JP7507865B2 - Colored composition, cured product, color filter, solid-state imaging device, image display device, resin, and method for producing the same - Google Patents

Description

The present disclosure relates to a colored composition, a cured product, a color filter, a solid-state imaging device, an image display device, a resin, and a method for producing the same.

Color filters are essential components of solid-state imaging devices or image display devices. In some cases, noise occurs in solid-state imaging devices and image display devices due to the reflection of visible light. To prevent this, light-shielding films are provided in solid-state imaging devices and image display devices to suppress the generation of noise.
As a method for producing such a color filter or a light-shielding film, a method is known in which a colored composition layer is formed using a colored photosensitive composition containing a colorant, a polymerizable compound, a photopolymerization initiator, and an alkali-soluble resin, and the colored photosensitive composition layer is exposed to light and developed to form a pattern.
Furthermore, as conventional block copolymers, those described in Patent Documents 1 and 2 are known.

Patent Document 1: JP 2007-321141 A Patent Document 2: JP 2001-81129 A

An object of the present disclosure is to provide a colored composition having excellent liquid stability.
Another problem to be solved by another embodiment of the present disclosure is to provide a cured product of the colored composition, a color filter including the cured product, or a solid-state imaging device or an image display device including the color filter.
Furthermore, a problem to be solved by another embodiment of the present disclosure is to provide a novel resin and a method for producing the same.

Means for solving the above problems include the following aspects.
<1> A coloring composition comprising a pigment, a resin represented by the following formula (1), and a solvent:

In formula (1), R ^1s each independently represent a divalent linking group, R ^2s each independently represent a hydrogen atom or a monovalent substituent, L ¹ represents a (n+1)-valent linking group, n represents an integer from 1 to 10, m represents an integer from 2 to 30, and P ¹ represents a polymer chain obtained by polymerizing an ethylenically unsaturated compound.

<2> The colored composition according to <1>, wherein P ¹ has a structure represented by the following formula (2):

In formula (2), ^R3 represents a hydrogen atom or an alkyl group, ^X1 represents a monovalent substituent, and L represents an integer of 1 or more.

<3> The colored composition according to <1> or <2>, wherein P ¹ has an adsorptive group.
<4> The colored composition according to <3>, wherein the adsorptive group is an acid group.
<5> The colored composition according to <2>, wherein the resin is a resin represented by the following formula (3):

In formula (3), R ¹ 's each independently represent a divalent linking group, R ² 's each independently represent a hydrogen atom or a monovalent substituent, L ² 's represents a (n+1)-valent linking group, n's represents an integer of 1 to 10, m's represents an integer of 2 to 30, and P ² 's represents a polymer chain having an acid group and a structure represented by formula (2) above.

<6> The coloring composition according to any one of <1> to <5>, in which R ¹ is an alkylene group having 3 to 6 carbon atoms, R ² is a hydrogen atom or an alkyl group, n is 1, and m is an integer of 4 to 20.
<7> The coloring composition according to any one of <1> to <4>, wherein the ethylenically unsaturated compound forming the ^P1 includes a compound having an acid group and having a minimum number of atoms connecting the ethylenically unsaturated group and the acid group of 6 to 20.
<8> The colored composition according to any one of <1> to <7>, wherein the resin has a weight average molecular weight of 3,000 to 15,000.
<9> The coloring composition according to any one of <1> to <4>, wherein the number of monomer units derived from the ethylenically unsaturated compound in ^P1 is 2 to 10.
<10> The colored composition according to any one of <1> to <9>, further comprising a polymerizable compound.
<11> A cured product obtained by drying or curing the colored composition according to any one of <1> to <10>.
<12> A color filter comprising the cured product according to <11>.
<13> A solid-state imaging device having the color filter according to <12>.
<14> An image display device having the color filter according to <12>.
<15> A resin represented by the following formula (3):

In formula (3), R ¹ 's each independently represent a divalent linking group, R ² 's each independently represent a hydrogen atom or a monovalent substituent, L ² 's represents a (n+1)-valent linking group, n's represents an integer of 1 to 10, m's represents an integer of 2 to 30, and P ² 's represents a polymer chain having an acid group and a structure represented by the following formula (2):

In formula (2), ^R3 represents a hydrogen atom or an alkyl group, ^X1 represents a monovalent substituent, and L represents an integer of 1 or more.

<16> A method for producing the resin according to <15>, comprising the following steps (i-1) and (i-2), or the following steps (ii-1) and (ii-2):
Step (i-1): A step of polymerizing an ethylenically unsaturated compound in the presence of a mercapto compound having a hydroxy group to prepare a resin having a hydroxy group at its terminal. Step (i-2): A step of forming a polyester resin chain at the hydroxy group of the resin having a hydroxy group at its terminal. Step (ii-1): A step of forming a polyester resin chain at the hydroxy group of a mercapto compound having a hydroxy group to prepare a polyester resin having a mercapto group. Step (ii-2): A step of polymerizing an ethylenically unsaturated compound in the presence of the polyester resin having a mercapto group.

According to an embodiment of the present disclosure, a colored composition having excellent liquid stability is provided.
Further, another embodiment according to the present disclosure provides a cured product of the colored composition, a color filter including the cured product, or a solid-state imaging device or an image display device including the color filter.
Furthermore, according to another embodiment of the present disclosure, a novel resin and a method for producing the same are provided.

The contents of the present disclosure will be described in detail below. The following description of the components may be based on a representative embodiment of the present disclosure, but the present disclosure is not limited to such an embodiment.
In the present disclosure, the use of "to" indicating a range of values means that the values before and after the range are included as the lower limit and upper limit.
In the numerical ranges described in the present disclosure in stages, the upper or lower limit value described in one numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. In addition, in the numerical ranges described in the present disclosure, the upper or lower limit value of the numerical range may be replaced with a value shown in the examples.
Furthermore, in the present disclosure, when a plurality of substances corresponding to each component are present in the composition, the amount of each component in the composition means the total amount of the corresponding substances present in the composition, unless otherwise specified.
In addition, in the description of groups (atomic groups) in this disclosure, descriptions that do not indicate whether they are substituted or unsubstituted include those that have no substituents as well as those that have a substituent. For example, an "alkyl group" includes not only an alkyl group that has no substituents (unsubstituted alkyl groups) but also an alkyl group that has a substituent (substituted alkyl groups).
In this disclosure, unless otherwise specified, "Me" represents a methyl group, "Et" represents an ethyl group, "Pr" represents a propyl group, "Bu" represents a butyl group, and "Ph" represents a phenyl group.
In the present disclosure, "(meth)acrylic" is a term used as a concept that includes both acrylic and methacrylic, and "(meth)acryloyl" is a term used as a concept that includes both acryloyl and methacryloyl.
In addition, in the present disclosure, the term "process" refers not only to an independent process, but also to a process that cannot be clearly distinguished from other processes, as long as the intended purpose of the process is achieved.
In the present disclosure, the term "total solid content" refers to the total mass of the components excluding the solvent from the entire composition of the composition. Also, as described above, the "solid content" refers to the components excluding the solvent, and may be, for example, solid or liquid at 25°C.

In the present disclosure, "mass %" and "weight %" are synonymous, and "parts by mass" and "parts by weight" are synonymous.
Furthermore, in the present disclosure, combinations of two or more preferred aspects are more preferred aspects.
In addition, unless otherwise specified, the weight average molecular weight (Mw) and number average molecular weight (Mn) in the present disclosure are molecular weights detected by a gel permeation chromatography (GPC) analyzer using columns of TSKgel GMHxL, TSKgel G4000HxL, or TSKgel G2000HxL (all product names manufactured by Tosoh Corporation) in a differential refractometer using THF (tetrahydrofuran) as a solvent, and converted using polystyrene as a standard substance.
In this specification, a pigment means a compound that is poorly soluble in a solvent.
In this specification, a dye means a compound that is easily soluble in a solvent.
The present disclosure will be described in detail below.

(Coloring composition)
The coloring composition according to the present disclosure contains a pigment, a resin represented by the following formula (1), and a solvent.

In formula (1), R ^1s each independently represent a divalent linking group, R ^2s each independently represent a hydrogen atom or a monovalent substituent, L ¹ represents a (n+1)-valent linking group, n represents an integer from 1 to 10, m represents an integer from 2 to 30, and P ¹ represents a polymer chain obtained by polymerizing an ethylenically unsaturated compound.

In recent years, the number of pixels in image sensors has increased, and patterns have become finer and thinner. Accordingly, there is a tendency for the pigment concentration in a coloring composition used in a color filter to be relatively increased, and for the amount of a curable component or a developable component to be reduced.
As a result of detailed investigations, the present inventors have found that conventional coloring compositions containing pigments do not have sufficient liquid stability, and there are cases in which pigment aggregation, precipitation, and the like frequently occur.
As a result of extensive investigations, the present inventors have found that by employing the above-mentioned configuration, a colored composition having excellent liquid stability can be obtained.
It is believed that by including the resin represented by the above formula (1), the polymer chain in ^P1 , which is presumed to have a polarity similar to that of the conjugated chain structure in the pigment, is coordinated to or adsorbed onto the pigment, and the polyester structure, which is a constituent repeating unit consisting of -O-R ¹ -CO- in the resin represented by the above formula (1), functions as a steric repulsive group and suppresses aggregation of the pigments, thereby resulting in excellent liquid stability.

<Resin represented by formula (1)>
The colored composition according to the present disclosure contains a resin represented by the above formula (1).
In formula (1), each R ¹ is preferably a divalent hydrocarbon group, more preferably an alkylene group, and particularly preferably a linear alkylene group, from the viewpoints of liquid stability and suppression of development residues.
The alkylene group may be linear or branched, or may have a ring structure.
From the viewpoints of liquid stability and suppression of development residues, the number of carbon atoms in ^R1 is preferably 1 to 10, more preferably 2 to 8, even more preferably 3 to 6, and particularly preferably 4 to 6.
The monovalent substituent in ^R2 of formula (1) is not particularly limited, and preferred examples include substituents having 1 to 20 carbon atoms. Examples of the monovalent substituent include an alkyl group, an aryl group, an acyl group, an alkylaminocarbonyl group, an alkoxycarbonyl group, an alkoxyalkyl group, a carboxyalkyl group, an alkoxycarbonylalkyl group, and a halogen atom-substituted alkyl group.
In formula (1), R ² is preferably each independently a hydrogen atom, an alkyl group, an acyl group, or an alkylaminocarbonyl group, more preferably a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an acyl group having 1 to 8 carbon atoms, or an alkylaminocarbonyl group having 2 to 9 carbon atoms, still more preferably a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an acyl group having 1 to 4 carbon atoms, or an alkylaminocarbonyl group having 2 to 5 carbon atoms, and particularly preferably a hydrogen atom, from the viewpoints of liquid stability, suppression of development residues, and adhesion.
In terms of liquid stability, suppression of development residue, and adhesion, ^L1 in formula (1) is preferably a (n+1)-valent linking group containing a sulfur atom, more preferably a (n+1)-valent linking group linked to ^P1 via a sulfur atom, further preferably a (n+1)-valent aliphatic hydrocarbon group having a sulfur atom at the end on the ^P1 side, and particularly preferably an alkylene group having a sulfur atom at the end on the ^P1 side.
From the viewpoints of liquid stability and suppression of development residues, the number of carbon atoms in ^L1 is preferably 2 to 10, more preferably 2 to 6, even more preferably 2 to 4, and particularly preferably 2 or 3.
In formula (1), n is preferably an integer of 1 to 4, more preferably an integer of 1 to 3, even more preferably 1 or 2, and particularly preferably 1, from the viewpoints of solution stability and suppression of development residues.
In formula (1), from the viewpoints of liquid stability and suppression of development residues, m is preferably an integer of from 2 to 25, more preferably an integer of from 4 to 20, even more preferably an integer of from 6 to 15, and particularly preferably an integer of from 8 to 12.

From the viewpoints of liquid stability and suppression of development residues, it is preferable that the resin represented by formula (1) has R ¹ as an alkylene group having 3 to 6 carbon atoms, R ² as a hydrogen atom or an alkyl group, n as 1, and m as an integer of 4 to 20.

The polymer chain obtained by polymerizing an ethylenically unsaturated compound in ^P1 of formula (1) is not particularly limited as long as it is a polymer chain having two or more monomer units derived from an ethylenically unsaturated compound.
The ethylenically unsaturated compound forming ^P1 is not particularly limited, and any known ethylenically unsaturated compound can be used. Examples of such compounds include (meth)acrylate compounds, (meth)acrylic acid, styrene compounds, (meth)acrylamide compounds, (meth)acrylonitrile compounds, vinyl ester compounds, vinyl ether compounds, olefin compounds, and (meth)allyl compounds.
Among these, from the viewpoints of liquid stability, suppression of development residue, and adhesion, at least one compound selected from the group consisting of a (meth)acrylate compound, (meth)acrylic acid, and a styrene compound is preferred, at least one compound selected from the group consisting of a (meth)acrylate compound and (meth)acrylic acid is more preferred, and a (meth)acrylate compound is particularly preferred.
The number of monomer units derived from an ethylenically unsaturated compound contained in ^P1 is not particularly limited, but from the viewpoints of liquid stability and suppression of development residues, it is preferably 2 to 20, more preferably 2 to 10, even more preferably 2 to 6, and particularly preferably 2 to 4.
In addition, in forming ^P1 , one kind of ethylenically unsaturated compound may be used alone, or two or more kinds of ethylenically unsaturated compounds may be used.
The terminal structure on the opposite side to ^L1 in the above ^P1 is not particularly limited, and may be a known terminal structure depending on the reaction termination conditions (quenching conditions) and isolation conditions during the production of the resin, such as a hydrogen atom, a hydroxyl group, an alkoxy group, a carboxyl group, an amino group, etc.

From the viewpoints of liquid stability, suppression of development residues, and adhesion, ^P1 preferably has an adsorptive group, and more preferably has a monomer unit having an adsorptive group.
Examples of the adsorptive group include an acid group, a hydroxy group, an aromatic group, a group having a dye structure, etc. Among them, from the viewpoints of liquid stability, suppression of development residue, and adhesion, an acid group is preferred, at least one group selected from the group consisting of a carboxy group, a salt of a carboxy group, a sulfonic acid group, a salt of a sulfonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group is more preferred, and a carboxy group is particularly preferred.
Furthermore, from the viewpoints of liquid stability, suppression of development residue, and adhesion, the monomer unit having the above-mentioned adsorptive group is preferably a monomer unit derived from a (meth)acrylate compound having an adsorptive group, or a monomer unit derived from (meth)acrylic acid, more preferably a monomer unit derived from a (meth)acrylate compound having an adsorptive group, and particularly preferably a monomer unit derived from a (meth)acrylate compound having a carboxy group.
Furthermore, from the viewpoints of liquid stability, suppression of development residues, and adhesion, the (meth)acrylate compound having an adsorptive group preferably further has an ester bond in addition to the (meth)acroxy group and the adsorptive group.

From the viewpoints of liquid stability, suppression of development residues, and adhesion, the ethylenically unsaturated compound forming ^P1 preferably includes a compound having an acid group and in which the minimum number of atoms linking the ethylenically unsaturated group and the acid group is 4 to 30, more preferably includes a compound having an acid group and in which the minimum number of atoms linking the ethylenically unsaturated group and the acid group is 6 to 20, and particularly preferably includes a compound having an acid group and in which the minimum number of atoms linking the ethylenically unsaturated group and the acid group is 6 to 12.
Incidentally, a specific example of the minimum number of atoms linking the ethylenically unsaturated group and the acid group is, for example, an ethylenically unsaturated compound that forms ^P1 in A-22 described below, where the minimum number of atoms is 8. Furthermore, when the ethylenically unsaturated compound is (meth)acrylic acid, the minimum number of atoms is 0, and when the ethylenically unsaturated compound is 2-carboxyethyl (meth)acrylate, the minimum number of atoms is 4.

From the viewpoints of liquid stability, suppression of development residues, and adhesion, ^P1 preferably has a structure represented by the following formula (2).

In formula (2), ^R3 represents a hydrogen atom or an alkyl group, ^X1 represents a monovalent substituent, and L represents an integer of 1 or more.

^R3 in formula (2) is preferably a hydrogen atom or a methyl group, and more preferably a methyl group.
In terms of liquid stability, suppression of development residues, and adhesion, ^X1 in formula (2) preferably has an adsorptive group, more preferably has an adsorptive group at its terminal. Preferred aspects of the adsorptive group in ^X1 are the same as those of the adsorptive group in ^P1 .
The number of carbon atoms in ^X1 in formula (2) is preferably 1 to 50, more preferably 1 to 40, even more preferably 4 to 30, and particularly preferably 6 to 25, from the viewpoints of liquid stability, suppression of development residue, and adhesion.
In terms of liquid stability, suppression of development residues, and adhesion, X ¹ in formula (2) is preferably a monovalent substituent comprising a carbon atom, a hydrogen atom, and an oxygen atom.
Furthermore, from the viewpoints of liquid stability, suppression of development residue, and adhesion, ^X1 in formula (2) is preferably a group consisting of one or more adsorptive groups, one or more divalent or trivalent alkylene groups, one or more ester bonds, and optionally an ether bond, more preferably a group consisting of one or more adsorptive groups, one or more divalent alkylene groups, and one or more ester bonds, and particularly preferably a group consisting of one or more adsorptive groups, two or more divalent alkylene groups, and two or more ester bonds.
In formula (2), L is preferably an integer of 2 to 20, more preferably an integer of 2 to 10, even more preferably an integer of 2 to 6, and particularly preferably an integer of 2 to 4, from the viewpoints of liquid stability and suppression of development residues.
When ^P1 has a structure represented by the formula (2), ^P1 may have only one type of structure represented by the formula (2), or may have two or more types of structures represented by the formula (2).

Specific examples of the structure represented by the above formula (2) include, but are not limited to, the structures shown below. Note that the numbers in the parentheses in the following specific examples indicate the number of repetitions.

From the viewpoints of liquid stability, suppression of development residue, and adhesion, the weight average molecular weight (Mw) of the resin represented by the above formula (1) is preferably 1,000 to 20,000, more preferably 3,000 to 15,000, even more preferably 3,000 to 10,000, particularly preferably 3,000 to 8,000, and most preferably 4,000 to 5,000.

When the resin represented by the above formula (1) has an acid group, preferably a carboxy group, the acid value of the resin represented by the above formula (1) is, from the viewpoints of liquid stability, suppression of development residue, and adhesion, preferably from 30 mgKOH/g to 200 mgKOH/g, more preferably from 40 mgKOH/g to 100 mgKOH/g, even more preferably from 50 mgKOH/g to 90 mgKOH/g, and particularly preferably from 60 mgKOH/g to 80 mgKOH/g.
The acid value of the compound or resin in the present disclosure is determined by neutralization titration using an aqueous sodium hydroxide solution. Specifically, the obtained compound or resin is dissolved in a solvent, and the solution is titrated with an aqueous sodium hydroxide solution using a potentiometric method to calculate the number of millimoles of acid contained in 1 g of solid resin, and then multiplied by the molecular weight of potassium hydroxide (KOH), 56.1, to determine the acid value. The unit of acid value is mgKOH/g.

From the viewpoints of liquid stability, suppression of development residue, and adhesion, it is preferable that the resin represented by the above formula (1) is a resin represented by the following formula (3).

In formula (3), R ¹ 's each independently represent a divalent linking group, R ² 's each independently represent a hydrogen atom or a monovalent substituent, L ² 's represents a (n+1)-valent linking group, n's represents an integer of 1 to 10, m's represents an integer of 2 to 30, and P ² 's represents a polymer chain having an acid group and a structure represented by formula (2) above.

Preferred embodiments of R ¹ , R ² , m and n in formula (3) are the same as the preferred embodiments of R ¹ , R ² , m and n in formula (1).
In terms of liquid stability, suppression of development residues, and adhesion, ^L2 in formula (3) is further preferably an (n+1)-valent aliphatic hydrocarbon group, even more preferably a divalent or trivalent aliphatic hydrocarbon group, and particularly preferably a linear alkylene group.
From the viewpoints of liquid stability and suppression of development residue, the number of carbon atoms in ^L2 is preferably 2 to 10, more preferably 2 to 6, even more preferably 2 to 4, and particularly preferably 2 or 3.

From the viewpoints of liquid stability, suppression of development residues, and adhesion, ^P2 preferably has an acid group at ^X1 in formula (2), and more preferably has an acid group at the terminal of ^X1 in formula (2).
Examples of the acid group in ^P2 include the acid groups described above as the adsorptive group, of which a carboxy group is preferred from the viewpoints of liquid stability, suppression of development residues, and adhesion.
The preferred embodiment of the structure represented by the formula (2) in the above ^P2 is the same as the preferred embodiment of the structure represented by the above formula (2).
Moreover, the above ^P2 may have one type of structure represented by the above formula (2) alone, or may have two or more types.
The terminal structure on the opposite side to the sulfur atom (S) in the above ^P2 is not particularly limited, and may be a known terminal structure depending on the reaction termination conditions (quenching conditions) and isolation conditions during the production of the resin, such as a hydrogen atom, a hydroxyl group, an alkoxy group, a carboxyl group, an amino group, etc.

The preferred ranges of the weight average molecular weight and acid value of the resin represented by the above formula (3) are the same as the preferred ranges of the weight average molecular weight and acid value of the resin represented by the above formula (1).

Preferred specific examples of the resin represented by the above formula (1) include the resins shown below, but needless to say, are not limited to these.
In the following specific examples, * represents the linking position between the polyester block and ^L1 , and * represents the linking position between ^L1 and ^P1 , the linking position between monomer units in ^P1 , or the linking position between ^P1 and the terminal structure. The number of * in ^L1 in the following specific examples represents the number n. Furthermore, the terminal structure on the opposite side to ^L1 in ^P1 is not particularly shown, and may be any of the above-mentioned structures.
As a specific example, a monomer unit derived from the following methacrylate compound may be preferably replaced with a monomer unit derived from the corresponding acrylate compound.

The colored composition according to the present disclosure may contain one type of resin represented by the above formula (1) alone, or may contain two or more types of resins.
The content of the resin represented by the above formula (1) is preferably 5% by mass to 40% by mass, and more preferably 5% by mass to 30% by mass, based on the total solid content of the colored composition, from the viewpoints of liquid stability, suppression of development residue, and adhesion.

The method for producing the resin represented by formula (1) is not particularly limited. In particular, when a resin represented by formula (3) is produced, a production method including the following steps (i-1) and (i-2) or the following steps (ii-1) and (ii-2) is preferred, and a production method including the following steps (i-1) and (i-2) is more preferred.
Step (i-1): A step of polymerizing an ethylenically unsaturated compound in the presence of a mercapto compound having a hydroxy group to prepare a resin having a hydroxy group at its terminal. Step (i-2): A step of forming a polyester resin chain at the hydroxy group of the resin having a hydroxy group at its terminal. Step (ii-1): A step of forming a polyester resin chain at the hydroxy group of a mercapto compound having a hydroxy group to prepare a polyester resin having a mercapto group. Step (ii-2): A step of polymerizing an ethylenically unsaturated compound in the presence of the polyester resin having a mercapto group.

The mercapto compound having a hydroxy group is preferably a hydroxyalkylthiol or a dihydroxyalkylthiol, and more preferably a hydroxyalkylthiol.
In the above step (i-1), the mercapto compound having a hydroxyl group acts as a chain transfer agent, and the ethylenically unsaturated compound is polymerized by the sulfur radical generated from the mercapto group, thereby obtaining a resin having a hydroxyl group at its terminal.
In the above step (ii-2), the polyester resin having a mercapto group acts as a chain transfer agent, and the ethylenically unsaturated compound is polymerized by the sulfur radical generated from the mercapto group, thereby obtaining the resin represented by formula (1).
The ethylenically unsaturated compound is not particularly limited, and the above-mentioned ethylenically unsaturated compounds can be suitably used. The amount of the compound used can be appropriately selected depending on the desired resin represented by formula (1).
As the monomer used to form the polyester resin chain, a hydroxycarboxylic acid compound and a lactone compound can be suitably used. The amount of the compound used can be appropriately selected depending on the desired resin represented by formula (1).
In each of the above steps, a known solvent, polymerization catalyst, polycondensation catalyst, etc. can be used as necessary, and the steps can be carried out in a known reaction apparatus. Furthermore, the reaction temperature and reaction time in each of the above steps can be appropriately set.
Furthermore, if necessary, a known purification treatment may be carried out after each step.

<Pigments>
The coloring composition according to the present disclosure includes a pigment.
The pigment may be either an inorganic pigment or an organic pigment, but is preferably an organic pigment. In addition, the pigment may be a material in which an inorganic pigment or an organic-inorganic pigment is partially substituted with an organic chromophore. By substituting an inorganic pigment or an organic-inorganic pigment with an organic chromophore, it becomes easier to design the hue.
The coloring composition according to the present disclosure can be preferably used as a coloring composition for forming color pixels in a color filter. Examples of the color pixels include red pixels, green pixels, blue pixels, magenta pixels, cyan pixels, and yellow pixels. Among them, green pixels are preferred.

The average primary particle diameter of the pigment is preferably 1 nm to 200 nm. The lower limit is more preferably 5 nm or more, and even more preferably 10 nm or more. The upper limit is more preferably 180 nm or less, even more preferably 150 nm or less, and particularly preferably 100 nm or less. If the average primary particle diameter of the pigment is within the above range, the dispersion stability of the pigment in the coloring composition is good. In this disclosure, the primary particle diameter of the pigment can be determined from an image photograph obtained by observing the primary particles of the pigment with a transmission electron microscope. Specifically, the projected area of the primary particles of the pigment is determined, and the corresponding circle equivalent diameter is calculated as the primary particle diameter of the pigment. In this disclosure, the average primary particle diameter is the arithmetic average value of the primary particle diameters of 400 primary particles of the pigment. In addition, the primary particles of the pigment refer to independent particles without aggregation.

The amount of pigment that dissolves in 100 g of propylene glycol methyl ether acetate at 25°C is preferably less than 0.01 g, more preferably less than 0.005 g, and even more preferably less than 0.001 g.

Examples of organic pigments include phthalocyanine pigments, dioxazine pigments, quinacridone pigments, anthraquinone pigments, perylene pigments, azo pigments, diketopyrrolopyrrole pigments, pyrrolopyrrole pigments, isoindoline pigments, quinophthalone pigments, triarylmethane pigments, xanthene pigments, methine pigments, and quinoline pigments.
Specific examples of organic pigments include the following:

Color Index (C.I.) Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 86, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 125, 126, 127, 128, 129, 137, 13 8, 139, 147, 148, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180, 181, 182, 185, 187, 188, 193, 194, 199, 213, 214, 215, 228, 231, 232 (methine type), 233 (quinoline type), 234 (aminoketone type), 235 (aminoketone type), 236 (aminoketone type) etc. (all yellow pigments),
C.I. Pigment Orange 2,5,13,16,17:1,31,34,36,38,43,46,48,49,51,52,55,59,60,61,62,64,71,73, etc. (orange pigments)
C. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 9, 10, 14, 17, 22, 23, 31, 38, 41, 48: 1, 48: 2, 48: 3, 48: 4, 49, 49: 1, 49: 2, 52: 1, 52: 2, 53: 1, 57: 1, 60: 1, 63: 1, 66, 67, 81: 1, 81: 2, 81: 3, 83, 88, 90, 105, 112, 119, 122, 123, 144, 146, 149, 150, 155, 166, 168, 169, 170, 171, 172, 175, 176, 177, 178, 179, 184, 185, 187, 188, 190, 200, 202, 206, 207, 208, 209, 210, 216, 220, 224, 226, 242, 246, 254, 255, 264, 270, 272, 279, 294 (xanthene type, Organo Ultramarine, Bluish Red), 295 (monoazo type), 296 (diazo type), 297 (aminoketone type) and the like (all red pigments),
C.I. Pigment Green 7, 10, 36, 37, 58, 59, 62, 63, 64 (phthalocyanine type), 65 (phthalocyanine type), 66 (phthalocyanine type) etc. (all green pigments),
C.I. Pigment Violet 1, 19, 23, 27, 32, 37, 42, 60 (triarylmethane type), 61 (xanthene type) etc. (all purple pigments),
C. I. Pigment Blue 1, 2, 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 22, 29, 60, 64, 66, 79, 80, 87 (monoazo type), 88 (methine type), etc. (all blue pigments).

Moreover, from the viewpoint of further exerting the effects of the present disclosure, the coloring composition according to the present disclosure preferably contains a green pigment as a pigment, and more preferably contains a green pigment and a yellow pigment.
Furthermore, from the viewpoints of sensitivity and spectral characteristics, the pigment preferably contains a phthalocyanine pigment, and more preferably contains a green phthalocyanine pigment.

As the green pigment, known pigments can be used, for example, phthalocyanine compounds such as Color Index (C.I.) Pigment Green 7, 10, 36, 37, 58, 59, 62, and 63.
In addition, as the green pigment, a halogenated zinc phthalocyanine compound having an average of 10 to 14 halogen atoms, an average of 8 to 12 bromine atoms, and an average of 2 to 5 chlorine atoms in one molecule can also be used. Specific examples include the compounds described in International Publication No. 2015/118720, the compounds described in Chinese Patent Publication No. 106909027, and phthalocyanine compounds having a phosphate ester as a ligand.
In addition, as the green pigment, the green pigment described in JP-A-2019-8014 or JP-A-2018-180023 may be used.
Among them, the green pigment preferably contains at least one compound selected from the group consisting of C.I. Pigment Green 58 and C.I. Pigment Green 36, and more preferably contains C.I. Pigment Green 58, because it is easy to form a film having spectral characteristics suitable for green pixels.

The green pigment may be used alone or in combination of two or more kinds.
The content of the green pigment in the total solid content of the coloring composition is preferably 10% by mass to 80% by mass. The lower limit is more preferably 15% by mass or more, and particularly preferably 20% by mass or more. The upper limit is more preferably 70% by mass or less, and particularly preferably 60% by mass or less.

Examples of yellow pigments include azo compounds, quinophthalone compounds, isoindolinone compounds, isoindoline compounds, anthraquinone compounds, etc. Among these, isoindoline compounds are preferred because they are easy to form a film with spectral characteristics suitable for green pixels.

Yellow pigments include Color Index (C.I.) Pigment Yellow (hereinafter, simply referred to as "PY") 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 24, 31, 32, 34, 35, 35:1, 36, 36:1, 37, 37:1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 86, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 125, 126, 12 7,128,129,137,138,139,147,148,150,151,152,153,154,155,156,161,162,164,166,167,168,169,170,171,172,173,174,175,176,177,179,180,181,182,185,187,188,193,194,199,213,214,215,228 (direct-linked quinophthalone dimers described in WO 2013/098836), 231,232 (methine/polymethine type), and the like.

In addition, the pigments described in JP 2017-201003 A and the pigments described in JP 2017-197719 A can be used as yellow pigments. In addition, a metal azo pigment containing at least one anion selected from the group consisting of azo compounds represented by the following formula (Y) and azo compounds having a tautomeric structure thereof, two or more metal ions, and a melamine compound can also be used as yellow pigments.

In formula (Y), R ^Y1 and R ^Y2 each independently represent -OH or -NR ^Y5 R ^Y6 , R ^Y3 and R ^Y4 each independently represent =O or =NR ^Y7 , and R ^Y5 to R ^Y7 each independently represent a hydrogen atom or an alkyl group.
The number of carbon atoms in the alkyl group represented by R ^Y5 to R ^Y7 is preferably 1 to 10, more preferably 1 to 6, and even more preferably 1 to 4. The alkyl group may be linear, branched, or cyclic, preferably linear or branched, and more preferably linear. The alkyl group may have a substituent. Preferred examples of the substituent include a halogen atom, a hydroxy group, an alkoxy group, a cyano group, and an amino group.

For the above metal azo pigments, please refer to the descriptions in paragraphs 0011 to 0062 and 0137 to 0276 of JP 2017-171912 A, paragraphs 0010 to 0062 and 0138 to 0295 of JP 2017-171913 A, paragraphs 0011 to 0062 and 0139 to 0190 of JP 2017-171914 A, and paragraphs 0010 to 0065 and 0142 to 0222 of JP 2017-171915 A, the contents of which are incorporated herein by reference.

In addition, as a yellow pigment, a quinophthalone dimer represented by the following formula (Q) can also be preferably used. Furthermore, the quinophthalone dimer described in Japanese Patent No. 6443711 can also be preferably used.

In formula (Q), X ₁ to X ₁₆ each independently represent a hydrogen atom or a halogen atom, and Z represents an alkylene group having 1 to 3 carbon atoms.

As yellow pigments, JP 2018-203798 A, JP 2018-62578 A, JP 6432077 A, JP 6432076 A, JP 2018-155881 A, JP 2018-111757 A, JP 2018-40835 A, JP 2017-197640 A, JP 2016-145282 A, JP 2014-85565 A, JP 2014-21139 A, JP 2013-209614 A, JP 2013-209435 A Quinophthalone pigments described in JP-A-2013-181015, JP-A-2013-61622, JP-A-2013-54339, JP-A-2013-32486, JP-A-2012-226110, JP-A-2008-74987, JP-A-2008-81565, JP-A-2008-74986, JP-A-2008-74985, JP-A-2008-50420, JP-A-2008-31281, or JP-B-48-32765 can also be suitably used.

In addition, as the yellow pigment, the quinophthalone compound described in paragraphs 0011 to 0034 of JP-A-2013-54339, the quinophthalone compound described in paragraphs 0013 to 0058 of JP-A-2014-26228, the yellow pigment described in JP-A-2019-8014, the quinophthalone compound described in Japanese Patent No. 6607427, the compound described in Korean Patent Publication No. 10-2014-0034963, the compound described in JP-A-2017-095706, the compound described in Taiwan Patent Application Publication No. 201920495, the compound described in Japanese Patent No. 6607427, and the like can also be used.
In addition, the compound described in JP-A-2018-62644 can also be used as a yellow pigment. This compound can also be used as a pigment derivative.
Furthermore, as described in JP-A-2018-155881, C.I. Pigment Yellow 129 may be added for the purpose of improving weather resistance.

As the red pigment, a diketopyrrolopyrrole compound having at least one bromine atom substituted in the structure described in JP 2017-201384 A, a diketopyrrolopyrrole compound described in paragraphs 0016 to 0022 of JP 6248838 A, a diketopyrrolopyrrole compound described in WO 2012/102399 A, a diketopyrrolopyrrole compound described in WO 2012/117965 A, a naphthol azo compound described in JP 2012-229344 A, a red pigment described in JP 6516119 A, a red pigment described in JP 6525101 A, etc. can also be used. In addition, as the red pigment, a compound having a structure in which an aromatic ring group having an oxygen atom, sulfur atom or nitrogen atom bonded to the aromatic ring is bonded to a diketopyrrolopyrrole skeleton can also be used.

In addition, an aluminum phthalocyanine compound having a phosphorus atom can also be used as a blue pigment. Specific examples include the compounds described in paragraphs 0022 to 0030 of JP-A No. 2012-247591 and paragraph 0047 of JP-A No. 2011-157478.

Examples of white pigments include titanium oxide, strontium titanate, barium titanate, zinc oxide, magnesium oxide, zirconium oxide, aluminum oxide, barium sulfate, silica, talc, mica, aluminum hydroxide, calcium silicate, aluminum silicate, hollow resin particles, zinc sulfide, etc. The white pigment is preferably a particle having a titanium atom, and more preferably titanium oxide. In addition, the white pigment is preferably a particle having a refractive index of 2.10 or more for light with a wavelength of 589 nm. The above-mentioned refractive index is preferably 2.10 to 3.00, and more preferably 2.50 to 2.75.

In addition, the white pigment may be titanium oxide as described in "Titanium Oxide: Physical Properties and Application Technology, by Kiyono Manabu, pages 13-45, published June 25, 1991, by Gihodo Publishing."

The white pigment may be not only a single inorganic substance, but also a particle composited with other materials. For example, it is preferable to use a particle having internal voids or other materials, a particle having a large number of inorganic particles attached to a core particle, or a core-shell composite particle composed of a core particle composed of a polymer particle and a shell layer composed of inorganic nanoparticles. For the core-shell composite particle composed of a core particle composed of a polymer particle and a shell layer composed of inorganic nanoparticles, the description in paragraphs 0012 to 0042 of JP 2015-047520 A can be referred to, for example, and the contents of this document are incorporated herein.

The white pigment may be hollow inorganic particles. Hollow inorganic particles are inorganic particles with a structure having a cavity inside, and refer to inorganic particles having a cavity surrounded by an outer shell. Examples of hollow inorganic particles include those described in JP 2011-075786 A, WO 2013/061621 A, JP 2015-164881 A, and the like, the contents of which are incorporated herein by reference.

There are no particular limitations on the black pigment, and known pigments can be used. Examples include carbon black, titanium black, graphite, etc., with carbon black and titanium black being preferred, and titanium black being more preferred. Titanium black is a black particle containing titanium atoms, and low-order titanium oxide or titanium oxynitride is preferred. Titanium black can be surface-modified as necessary for the purpose of improving dispersibility, suppressing aggregation, etc. For example, the surface of titanium black can be coated with silicon oxide, titanium oxide, germanium oxide, aluminum oxide, magnesium oxide, or zirconium oxide. It is also possible to treat it with a water-repellent substance as shown in JP-A-2007-302836. Examples of black pigments include Color Index (C.I.) Pigment Black 1 and 7. It is preferable that both the primary particle size and the average primary particle size of the individual particles of titanium black are small. Specifically, it is preferable that the average primary particle size is 10 to 45 nm. Titanium black can also be used as a dispersion. For example, a dispersion containing titanium black particles and silica particles, and having a ratio of Si atoms to Ti atoms in the dispersion adjusted to a range of 0.20 to 0.50, can be mentioned. For the above dispersion, the description in paragraphs 0020 to 0105 of JP 2012-169556 A can be referred to, and the contents of this specification are incorporated herein. Examples of commercially available titanium black products include Titanium Black 10S, 12S, 13R, 13M, 13M-C, 13R-N, and 13M-T (product names: manufactured by Mitsubishi Materials Corporation), Tilack D (product name: manufactured by Ako Kasei Co., Ltd.), and the like.

In addition, the pigments used in the present disclosure are preferably pigments having a specific X-ray diffraction pattern using CuKα radiation. Specific examples include the phthalocyanine pigments described in Japanese Patent No. 6,561,862, the diketopyrrolopyrrole pigments described in Japanese Patent No. 6,413,872, and the azo pigments (C.I. Pigment Red 269) described in Japanese Patent No. 6,281,345.

The coloring composition according to the present disclosure may contain one type of pigment alone, or may contain two or more types of pigments.
The content of the pigment is 40% by mass or more based on the total solid content in the coloring composition, and from the viewpoints of suppression of development residue, dispersion stability, and adhesion, it is preferably 45% by mass or more, more preferably 50% by mass or more, and particularly preferably 60% by mass or more. The upper limit is preferably 80% by mass or less.

<Resin>
The coloring composition according to the present disclosure contains a resin. The resin is blended, for example, for dispersing particles such as pigments in the coloring composition and for use as a binder. A resin used mainly for dispersing particles such as pigments is also called a dispersant. However, such uses of the resin are only examples, and the resin may be used for purposes other than such uses. It is presumed that the resin represented by the above formula (1) acts as a dispersant as described above.

The weight average molecular weight (Mw) of the resin is preferably 3,000 to 2,000,000. The upper limit is more preferably 1,000,000 or less, and particularly preferably 500,000 or less. The lower limit is more preferably 4,000 or more, and particularly preferably 5,000 or more.

Examples of resins include (meth)acrylic resins, ene-thiol resins, polycarbonate resins, polyether resins, polyarylate resins, polysulfone resins, polyethersulfone resins, polyphenylene resins, polyarylene ether phosphine oxide resins, polyimide resins, polyamideimide resins, polyolefin resins, cyclic olefin resins, polyester resins, and styrene resins. One of these resins may be used alone, or two or more may be mixed and used. In addition, the resins described in paragraphs 0041 to 0060 of JP-A-2017-206689, the resins described in paragraphs 0022 to 0071 of JP-A-2018-010856, the resins described in JP-A-2017-057265, the resins described in JP-A-2017-032685, the resins described in JP-A-2017-075248, and the resins described in JP-A-2017-066240 can also be used.

The coloring composition according to the present disclosure preferably contains a resin having an acid group as a resin. According to this aspect, the developability of the coloring composition can be improved, pixels with excellent rectangularity can be easily formed, and by interacting with the amine compound, the resin functions favorably as a dispersant, resulting in superior pigment dispersibility. Examples of the acid group include a carboxy group, a phosphate group, a sulfo group, and a phenolic hydroxy group, and the carboxy group is preferred. The resin having an acid group can be used, for example, as an alkali-soluble resin.

The resin having an acid group preferably contains a repeating unit having an acid group on a side chain, and more preferably contains 5 mol % to 70 mol % of the repeating units having an acid group on a side chain of all repeating units of the resin. The upper limit of the content of repeating units having an acid group on a side chain is preferably 50 mol % or less, and more preferably 30 mol % or less. The lower limit of the content of repeating units having an acid group on a side chain is preferably 10 mol % or more, and more preferably 20 mol % or more.

It is also preferable that the resin having an acid group contains a repeating unit derived from a monomer component containing at least one monomer selected from the group consisting of a compound represented by the following formula (ED1) and a compound represented by the following formula (ED2) (hereinafter, these compounds may be referred to as "ether dimers").

In formula (ED1), R ¹ and R ² each independently represent a hydrogen atom or a hydrocarbon group having 1 to 25 carbon atoms which may have a substituent.

In formula (ED2), R represents a hydrogen atom or an organic group having 1 to 30 carbon atoms. For details of formula (ED2), refer to the description in JP 2010-168539 A, the contents of which are incorporated herein by reference.

Specific examples of ether dimers can be found, for example, in paragraph 0317 of JP 2013-029760 A, the contents of which are incorporated herein by reference.

It is also preferred that the resin used in the present disclosure contains a repeating unit derived from a compound represented by the following formula (X):

In formula (X), _R1 represents a hydrogen atom or a methyl group, _R2 represents an alkylene group having 2 to 10 carbon atoms, _R3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms which may contain a benzene ring, and n represents an integer of 1 to 15.

For the resin having an acid group, please refer to the descriptions in paragraphs [0558] to [0571] of JP 2012-208494 A (corresponding paragraphs [0685] to [0700] of the specification of U.S. Patent Application Publication No. 2012/0235099) and the descriptions in paragraphs [0076] to [0099] of JP 2012-198408 A, the contents of which are incorporated herein by reference. In addition, commercially available products may be used as the resin having an acid group.

The acid value of the resin having acid groups is preferably 30 mgKOH/g to 500 mgKOH/g. The lower limit is more preferably 40 mgKOH/g or more, and particularly preferably 50 mgKOH/g or more. The upper limit is more preferably 400 mgKOH/g or less, even more preferably 300 mgKOH/g or less, and particularly preferably 200 mgKOH/g or less. The weight average molecular weight (Mw) of the resin having acid groups is preferably 5,000 to 100,000. The number average molecular weight (Mn) of the resin having acid groups is preferably 1,000 to 20,000.

The method for introducing an acidic functional group into the resin is not particularly limited, but may be, for example, the method described in Japanese Patent No. 6,349,629.
Further, examples of a method for introducing an acidic functional group into a resin include a method in which an acid anhydride is reacted with a hydroxy group generated by a ring-opening reaction of an epoxy group in a dispersant (particularly a dispersant having an ethylenically unsaturated group) or an alkali-soluble resin to introduce an acid group.

In the present disclosure, it is preferable to use a resin having a basic group as the resin. According to this embodiment, the developability of the coloring composition can be improved, and pixels with excellent rectangularity can be easily formed. Examples of the basic group include an amino group and a heteroaryl group having a nitrogen atom, and an amino group is preferable, and a tertiary amino group is more preferable. The resin having a basic group can be used, for example, as an alkali-soluble resin.

The amine value of the resin having an amino group as a basic group is preferably 30 mgKOH/g to 200 mgKOH/g. The lower limit is more preferably 40 mgKOH/g or more, and particularly preferably 50 mgKOH/g or more. The upper limit is more preferably 250 mgKOH/g or less, even more preferably 200 mgKOH/g or less, and particularly preferably 150 mgKOH/g or less. The weight average molecular weight (Mw) of the resin having an amino group is preferably 5,000 to 100,000. The number average molecular weight (Mn) of the resin having an amino group is preferably 1,000 to 20,000.

The coloring composition according to the present disclosure may contain a resin other than the resin represented by the above formula (1) as a dispersant. Examples of dispersants include acidic dispersants (acidic resins) and basic dispersants (basic resins). Here, the acidic dispersant (acidic resin) refers to a resin in which the amount of acid groups is greater than the amount of basic groups. The acidic dispersant (acidic resin) is preferably a resin in which the amount of acid groups is 70 mol% or more when the total amount of the acid groups and the amount of the basic groups is 100 mol%, and more preferably a resin consisting essentially of acid groups. The acid group possessed by the acidic dispersant (acidic resin) is preferably a carboxy group. The acid value of the acidic dispersant (acidic resin) is preferably 40 mgKOH/g to 105 mgKOH/g, more preferably 50 mgKOH/g to 105 mgKOH/g, and even more preferably 60 mgKOH/g to 105 mgKOH/g. The basic dispersant (basic resin) refers to a resin in which the amount of basic groups is greater than the amount of acid groups. The basic dispersant (basic resin) is preferably a resin having a basic group content of more than 50 mol % when the total amount of the acid group and the basic group is taken as 100 mol %. The basic group possessed by the basic dispersant is preferably an amino group.

It is preferable that the resin used as the dispersant contains a repeating unit having an acid group. By containing a repeating unit having an acid group in the resin used as the dispersant, the generation of development residues can be further suppressed when forming a pattern by photolithography.

It is also preferable that the resin used as the dispersant is a graft resin. For details of the graft resin, please refer to the description in paragraphs 0025 to 0094 of JP 2012-255128 A, the contents of which are incorporated herein by reference.

It is also preferable that the resin used as the dispersant is a polyimine-based dispersant containing nitrogen atoms in at least one of the main chain and the side chain. As the polyimine-based dispersant, a resin having a main chain with a partial structure having a functional group with a pKa of 14 or less and a side chain with 40 to 10,000 atoms, and having a basic nitrogen atom in at least one of the main chain and the side chain, is preferable. There are no particular limitations on the basic nitrogen atom as long as it is a nitrogen atom that exhibits basicity. For details of polyimine-based dispersants, please refer to the description in paragraphs 0102 to 0166 of JP 2012-255128 A, the contents of which are incorporated herein by reference.

It is also preferable that the resin used as the dispersant has a structure in which multiple polymer chains are bonded to a core portion. Examples of such resins include dendrimers (including star-shaped polymers). Specific examples of dendrimers include polymer compounds C-1 to C-31 described in paragraphs 0196 to 0209 of JP 2013-043962 A.

In addition, the above-mentioned resins having acid groups (alkali-soluble resins) can also be used as dispersants.

It is also preferable that the resin used as the dispersant is a resin containing a repeating unit having an ethylenically unsaturated bond-containing group in the side chain. The content of the repeating unit having an ethylenically unsaturated bond-containing group in the side chain is preferably 10 mol% or more of the total repeating units of the resin, more preferably 10 mol% to 80 mol%, and even more preferably 20 mol% to 70 mol%.

As the dispersant, a resin having an aromatic carboxy group (hereinafter, referred to as "resin B") is preferably used.
In the resin B, the aromatic carboxy group may be included in the main chain of the repeating unit, or may be included in the side chain of the repeating unit. For the reason that the developability and color removal are excellent, the aromatic carboxy group is preferably included in the main chain of the repeating unit. Although the details are unclear, it is presumed that the presence of the aromatic carboxy group near the main chain further improves these properties. In this specification, the aromatic carboxy group refers to a group having a structure in which one or more carboxyl groups are bonded to an aromatic ring. In the aromatic carboxy group, the number of carboxy groups bonded to the aromatic ring is preferably 1 to 4, and more preferably 1 to 2.

It is preferable that the resin B used in the present disclosure is a resin containing at least one repeating unit selected from the repeating unit represented by formula (b-1) and the repeating unit represented by formula (b-10).

In formula (b-1), Ar ¹ represents a group containing an aromatic carboxyl group, L ¹ represents --COO-- or --CONH--, and L ² represents a divalent linking group.
In formula (b-10), Ar ¹⁰ represents a group containing an aromatic carboxyl group, L ¹¹ represents --COO-- or --CONH--, L ¹² represents a trivalent linking group, and P ¹⁰ represents a polymer chain.

First, formula (b-1) will be described. In formula (b-1), the group containing an aromatic carboxy group represented by Ar ¹ includes a structure derived from an aromatic tricarboxylic acid anhydride, a structure derived from an aromatic tetracarboxylic acid anhydride, and the like. Examples of the aromatic tricarboxylic acid anhydride and aromatic tetracarboxylic acid anhydride include compounds having the following structures.

In the above formula, Q ¹ represents a single bond, —O—, —CO—, —COOCH ₂ CH ₂ OCO—, —SO ₂ —, —C(CF ₃ ) ₂ —, a group represented by the following formula (Q-1) or a group represented by the following formula (Q-2).

Specific examples of aromatic tricarboxylic anhydrides include benzenetricarboxylic anhydride (1,2,3-benzenetricarboxylic anhydride, trimellitic anhydride [1,2,4-benzenetricarboxylic anhydride], etc.), naphthalenetricarboxylic anhydride (1,2,4-naphthalenetricarboxylic anhydride, 1,4,5-naphthalenetricarboxylic anhydride, 2,3,6-naphthalenetricarboxylic anhydride, 1,2,8-naphthalenetricarboxylic anhydride, etc.), 3,4,4'-benzophenonetricarboxylic anhydride, 3,4,4'-biphenylethertricarboxylic anhydride, 3,4,4'-biphenyltricarboxylic anhydride, 2,3,2'-biphenyltricarboxylic anhydride, 3,4,4'-biphenylmethanetricarboxylic anhydride, and 3,4,4'-biphenylsulfonetricarboxylic anhydride. Specific examples of aromatic tetracarboxylic acid anhydrides include pyromellitic dianhydride, ethylene glycol ditrimellitic anhydride ester, propylene glycol ditrimellitic anhydride ester, butylene glycol ditrimellitic anhydride ester, 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride, 3,3',4,4'-biphenylsulfone tetracarboxylic acid dianhydride, 1,4,5,8-naphthalene tetracarboxylic acid dianhydride, 2,3,6,7-naphthalene tetracarboxylic acid dianhydride, 3,3',4,4'-biphenyl ether tetracarboxylic acid dianhydride, 3,3',4,4'-dimethyldiphenylsilane tetracarboxylic acid dianhydride, 3,3',4,4'-tetraphenylsilane tetracarboxylic acid dianhydride, 1,2,3,4-furan tetracarboxylic acid dianhydride, 4,4'-bis(3,4-dicarboxyphenoxy)diphenyl sulfide dianhydride, 4,4'-bis(3,4-dicarboxyphenoxy)diphenylsulfone dianhydride. dianhydride, 4,4'-bis(3,4-dicarboxyphenoxy)diphenylpropane dianhydride, 3,3',4,4'-perfluoroisopropylidenediphthalic dianhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride, bis(phthalic acid)phenylphosphine oxide dianhydride, p-phenylene-bis(triphenylphthalic acid) dianhydride, m-phenylene-bis(triphenylphthalic acid) dianhydride, bis(triphenylphthalic acid)-4,4'-diphenyl ether dianhydride, bis(triphenylphthalic acid)-4,4'-diphenylmethane dianhydride, 9,9-bis(3,4-dicarboxyphenyl)fluorene dianhydride, 9,9-bis[4-(3,4-dicarboxyphenoxy)phenyl]fluorene dianhydride, 3,4-dicarboxy-1,2,3,4-tetrahydro-1-naphthalene succinic dianhydride, or 3,4-dicarboxy-1,2,3,4-tetrahydro-6-methyl-1-naphthalene succinic dianhydride.

Specific examples of the group containing an aromatic carboxyl group represented by Ar ¹ include a group represented by formula (Ar-1), a group represented by formula (Ar-2), and a group represented by formula (Ar-3).

In formula (Ar-1), n1 represents an integer of 1 to 4, preferably 1 or 2, and more preferably 2.
In formula (Ar-2), n2 represents an integer of 1 to 8, preferably an integer of 1 to 4, more preferably 1 or 2, and even more preferably 2.
In formula (Ar-3), n3 and n4 each independently represent an integer of 0 to 4, and are preferably an integer of 0 to 2, more preferably 1 or 2, and even more preferably 1. However, at least one of n3 and n4 is an integer of 1 or more.
In formula (Ac-3), Q ¹ represents a single bond, —O—, —CO—, —COOCH ₂ CH ₂ OCO—, —SO ₂ —, —C(CF ₃ ) ₂ —, a group represented by the above formula (Q-1) or a group represented by the above formula (Q-2).

In formula (b-1), L ¹ represents —COO— or —CONH—, and preferably represents —COO—.

In formula (b-1), the divalent linking group represented by L ² includes an alkylene group, an arylene group, -O-, -CO-, -COO-, -OCO-, -NH-, -S-, and a group combining two or more of these. The number of carbon atoms of the alkylene group is preferably 1 to 30, more preferably 1 to 20, and even more preferably 1 to 15. The alkylene group may be linear, branched, or cyclic. The number of carbon atoms of the arylene group is preferably 6 to 30, more preferably 6 to 20, and even more preferably 6 to 10. The alkylene group and the arylene group may have a substituent. Examples of the substituent include a hydroxy group. The divalent linking group represented by L ² is preferably a group represented by -O-L ^2a -O-. Examples of L ^2a include an alkylene group; an arylene group; a group combining an alkylene group and an arylene group; and a group combining at least one selected from an alkylene group and an arylene group with at least one selected from the group consisting of -O-, -CO-, -COO-, -OCO-, -NH-, and -S-. The number of carbon atoms in the alkylene group is preferably 1 to 30, more preferably 1 to 20, and even more preferably 1 to 15. The alkylene group may be linear, branched, or cyclic. The alkylene group and the arylene group may have a substituent. Examples of the substituent include a hydroxy group.

Next, formula (b-10) will be described. The aromatic carboxyl-containing group represented by Ar ¹⁰ in formula (b-10) has the same meaning as Ar ¹ in formula (b-1), and the preferred range is also the same.

In formula (b-10), L ¹¹ represents —COO— or —CONH—, and preferably represents —COO—.

In formula (b-10), the trivalent linking group represented by L ¹² includes a hydrocarbon group, -O-, -CO-, -COO-, -OCO-, -NH-, -S-, and a group combining two or more of these. Examples of the hydrocarbon group include an aliphatic hydrocarbon group and an aromatic hydrocarbon group. The carbon number of the aliphatic hydrocarbon group is preferably 1 to 30, more preferably 1 to 20, and even more preferably 1 to 15. The aliphatic hydrocarbon group may be linear, branched, or cyclic. The carbon number of the aromatic hydrocarbon group is preferably 6 to 30, more preferably 6 to 20, and even more preferably 6 to 10. The hydrocarbon group may have a substituent. Examples of the substituent include a hydroxyl group. The trivalent linking group represented by L ¹² is preferably a group represented by the following formula (L12-1), and more preferably a group represented by formula (L12-2).

L ^12a and L ^12b each independently represent a trivalent linking group, X ¹ represents S, *1 represents the bonding position to L ¹¹ in formula (b-10), and *2 represents the bonding position to P ¹⁰ in formula (b-10).

Examples of the trivalent linking group represented by L ^12a and L ^12b include a hydrocarbon group; and a group formed by combining a hydrocarbon group with at least one selected from the group consisting of -O-, -CO-, -COO-, -OCO-, -NH-, and -S-.

In formula (b-10), P ¹⁰ represents a polymer chain. The polymer chain represented by P ¹⁰ preferably has at least one repeating unit selected from poly(meth)acrylic repeating units, polyether repeating units, polyester repeating units, and polyol repeating units. The weight average molecular weight of the polymer chain P ¹⁰ is preferably 500 to 20,000. The lower limit is more preferably 500 or more, and particularly preferably 1,000 or more. The upper limit is more preferably 10,000 or less, even more preferably 5,000 or less, and particularly preferably 3,000 or less. When the weight average molecular weight of P ¹⁰ is within the above range, the dispersibility of the pigment in the composition is good. When the resin B is a resin having a repeating unit represented by formula (b-10), the resin B is preferably used as a dispersant.

In formula (b-10), the polymer chain represented by ^P10 is preferably a polymer chain containing repeating units represented by the following formulas (P-1) to (P-5), and more preferably a polymer chain containing a repeating unit represented by formula (P-5).

In the above formula, R ^P1 and R ^P2 each represent an alkylene group. The alkylene group represented by R ^P1 and R ^P2 is preferably a linear or branched alkylene group having 1 to 20 carbon atoms, more preferably a linear or branched alkylene group having 2 to 16 carbon atoms, and even more preferably a linear or branched alkylene group having 3 to 12 carbon atoms.
In the above formula, R ^P3 represents a hydrogen atom or a methyl group.
In the above formula, L ^P1 represents a single bond or an arylene group, and L ^P2 represents a single bond or a divalent linking group. L ^P1 is preferably a single bond. Examples of the divalent linking group represented by L ^P2 include an alkylene group (preferably an alkylene group having 1 to 12 carbon atoms), an arylene group (preferably an arylene group having 6 to 20 carbon atoms), -NH-, -SO-, -SO ₂ -, -CO-, -O-, -COO-, -OCO-, -S-, -NHCO-, -CONH-, and groups formed by combining two or more of these.
R ^P4 represents a hydrogen atom or a substituent. Examples of the substituent include a hydroxy group, a carboxy group, an alkyl group, an aryl group, a heteroaryl group, an alkoxy group, an aryloxy group, a heteroaryloxy group, an alkylthioether group, an arylthioether group, a heteroarylthioether group, a (meth)acryloyl group, an oxetanyl group, and a blocked isocyanate group. In addition, the blocked isocyanate group in the present disclosure is a group capable of generating an isocyanate group by heat, and for example, a group in which a blocking agent and an isocyanate group are reacted to protect the isocyanate group can be preferably exemplified. Examples of the blocking agent include an oxime compound, a lactam compound, a phenol compound, an alcohol compound, an amine compound, an active methylene compound, a pyrazole compound, a mercaptan compound, an imidazole compound, and an imide compound. Examples of the blocking agent include the compounds described in paragraphs 0115 to 0117 of JP 2017-067930 A, the contents of which are incorporated herein. Moreover, the blocked isocyanate group is preferably a group capable of generating an isocyanate group by heat at 90°C to 260°C.

The polymer chain represented by P ¹⁰ preferably has at least one group selected from the group consisting of a (meth)acryloyl group, an oxetanyl group, a blocked isocyanate group, and a t-butyl group (hereinafter also referred to as "functional group A"). It is more preferable that the functional group A is at least one selected from the group consisting of a (meth)acryloyl group, an oxetanyl group, and a blocked isocyanate group. When the polymer chain contains the functional group A, it is easy to form a film having excellent solvent resistance. In particular, when the polymer chain contains at least one group selected from a (meth)acryloyl group, an oxetanyl group, and a blocked isocyanate group, the above effect is remarkable. In addition, when the functional group A has a t-butyl group, it is preferable to contain a compound having an epoxy group or an oxetanyl group in the composition. When the functional group A has a blocked isocyanate group, it is preferable to contain a compound having a hydroxyl group in the composition.

The polymer chain represented by ^P10 is more preferably a polymer chain having a repeating unit containing the functional group A in the side chain. The proportion of the repeating units containing the functional group A in the side chain in all repeating units constituting ^P10 is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more. The upper limit can be 100% by mass, and is preferably 90% by mass or less, and more preferably 60% by mass or less.

It is also preferable that the polymer chain represented by ^P10 has a repeating unit containing an acid group. Examples of the acid group include a carboxy group, a phosphate group, a sulfo group, and a phenolic hydroxy group. According to this embodiment, the dispersibility of the pigment in the composition can be further improved. Furthermore, the developability can also be further improved. The proportion of the repeating unit containing an acid group is preferably 1% by mass to 30% by mass, more preferably 2% by mass to 20% by mass, and even more preferably 3% by mass to 10% by mass.

Resin B can be produced by reacting at least one acid anhydride selected from the group consisting of aromatic tetracarboxylic anhydrides and aromatic tricarboxylic anhydrides with a hydroxyl group-containing compound. Examples of aromatic tetracarboxylic anhydrides and aromatic tricarboxylic anhydrides include those mentioned above. The hydroxyl group-containing compound is not particularly limited as long as it has a hydroxyl group in the molecule, but is preferably a polyol having two or more hydroxyl groups in the molecule. It is also preferable to use a compound having two hydroxyl groups and one thiol group in the molecule as the hydroxyl group-containing compound. Examples of compounds having two hydroxyl groups and one thiol group in the molecule include 1-mercapto-1,1-methanediol, 1-mercapto-1,1-ethanediol, 3-mercapto-1,2-propanediol (thioglycerin), 2-mercapto-1,2-propanediol, 2-mercapto-2-methyl-1,3-propanediol, 2-mercapto-2-ethyl-1,3-propanediol, 1-mercapto-2,2-propanediol, 2-mercaptoethyl-2-methyl-1,3-propanediol, or 2-mercaptoethyl-2-ethyl-1,3-propanediol. Other hydroxyl group-containing compounds include those described in paragraphs 0084 to 0095 of JP 2018-101039 A, the contents of which are incorporated herein by reference.

It is preferable that the molar ratio of the acid anhydride groups in the above acid anhydride to the hydroxyl groups in the hydroxyl group-containing compound (acid anhydride groups/hydroxyl groups) is 0.5 to 1.5.

In addition, a resin containing a repeating unit represented by the above-mentioned formula (b-10) can be synthesized by the following synthesis methods (1) to (2), etc.

[Synthesis method (1)]
The method comprises radically polymerizing a polymerizable monomer having an ethylenically unsaturated group in the presence of a hydroxyl group-containing thiol compound (preferably a compound having two hydroxyl groups and one thiol group in the molecule) to synthesize a vinyl polymer having two hydroxyl groups at one terminal region, and then reacting the synthesized vinyl polymer with one or more aromatic acid anhydrides selected from the group consisting of aromatic tetracarboxylic acid anhydrides and aromatic tricarboxylic acid anhydrides.

[Synthesis method (2)]
A method of producing the polymerizable monomer by reacting a hydroxyl group-containing compound (preferably a compound having two hydroxyl groups and one thiol group in the molecule) with one or more aromatic acid anhydrides selected from the group consisting of aromatic tetracarboxylic acid anhydrides and aromatic tricarboxylic acid anhydrides, and then radically polymerizing a polymerizable monomer having an ethylenically unsaturated group in the presence of the resulting reactant. In the synthesis method (2), after radically polymerizing the polymerizable monomer having a hydroxyl group, it may be further reacted with a compound having an isocyanate group (for example, a compound having an isocyanate group and the above-mentioned functional group A). This allows the functional group A to be introduced into the polymer chain P ¹⁰ .

Resin B can also be synthesized according to the method described in paragraphs 0120 to 0138 of JP 2018-101039 A.

The weight average molecular weight of resin B is preferably 2,000 to 35,000. The upper limit is more preferably 25,000 or less, even more preferably 20,000 or less, and particularly preferably 15,000 or less. The lower limit is more preferably 4,000 or more, even more preferably 6,000 or more, and particularly preferably 7,000 or more. If the weight average molecular weight of resin B is within the above range, the effects of the present disclosure can be obtained more significantly. In addition, the storage stability of the coloring composition can be improved.

Dispersants are also available as commercially available products, and specific examples include the DISPERBYK series manufactured by BYK Chemie (e.g., DISPERBYK-111, 161, etc.) and the Solsperse series manufactured by Lubrizol Japan Co., Ltd. (e.g., Solsperse 76500, etc.). In addition, pigment dispersants described in paragraphs 0041 to 0130 of JP 2014-130338 A can also be used, the contents of which are incorporated herein by reference. The resins described above as dispersants can also be used for purposes other than as dispersants. For example, they can be used as binders.

In the colored composition according to the present disclosure, only one type of resin may be used, or two or more types may be used in combination. When two or more types are used in combination, the total amount thereof is preferably in the following range.
The content of the resin is preferably 5% by mass to 40% by mass, more preferably 10% by mass to 30% by mass, and particularly preferably 10% by mass to 25% by mass, based on the total solid content of the colored composition, from the viewpoints of suppression of development residues, dispersion stability, and adhesion.
In addition, the content of the resin used as a dispersant is preferably less than the content of the resin represented by the above formula (1).

<Pigment Derivatives>
The coloring composition according to the present disclosure may contain a pigment derivative (hereinafter, also simply referred to as a "derivative").
Examples of the pigment derivative include compounds having a structure in which a part of the chromophore is replaced with an acid group or a basic group. Examples of the chromophore constituting the pigment derivative include a quinoline skeleton, a benzimidazolone skeleton, a diketopyrrolopyrrole skeleton, an azo skeleton, a phthalocyanine skeleton, an anthraquinone skeleton, a quinacridone skeleton, a dioxazine skeleton, a perinone skeleton, a perylene skeleton, a thioindigo skeleton, an isoindoline skeleton, an isoindolinone skeleton, a quinophthalone skeleton, a threne skeleton, and a metal complex skeleton, and the like. The quinoline skeleton, the benzimidazolone skeleton, the diketopyrrolopyrrole skeleton, an azo skeleton, a quinophthalone skeleton, an isoindoline skeleton, and a phthalocyanine skeleton are preferred, and the azo skeleton and the benzimidazolone skeleton are more preferred. Examples of the acid group include a sulfo group, a carboxy group, a phosphoric acid group, and salts thereof. Examples of atoms or atomic groups constituting the salt include alkali metal ions (Li ⁺ , Na ⁺ , K ⁺ , etc.), alkaline earth metal ions (Ca2 ⁺ , Mg2 ⁺ , etc.), ammonium ions, imidazolium ions, pyridinium ions, phosphonium ions, etc. Examples of basic groups include amino groups, pyridinyl groups and their salts, ammonium salts, and phthalimidomethyl groups. Examples of atoms or atomic groups constituting the salt include hydroxide ions, halogen ions, carboxylate ions, sulfonate ions, and phenoxide ions.

As the pigment derivative, a pigment derivative having excellent visible transparency (hereinafter also referred to as a transparent pigment derivative) can also be used. The maximum molar absorption coefficient (εmax) of the transparent pigment derivative in the wavelength region of 400 nm to 700 nm is preferably 3,000 L mol ^-1 cm ^-1 or less, more preferably 1,000 L mol ^-1 cm ^-1 or less, and even more preferably 100 L mol ^-1 cm ^-1 or less. The lower limit of εmax is, for example, 1 L mol- ¹ cm ^-1 or more, and may be 10 L mol ^-1 cm ^-1 or more.

Specific examples of pigment derivatives include JP-A-56-118462, JP-A-63-264674, JP-A-01-217077, JP-A-03-009961, JP-A-03-026767, JP-A-03-153780, JP-A-03-045662, JP-A-04-285669, JP-A-06-145546, JP-A-06-212088, JP-A-06-240158, JP-A-10-030063, JP-A-10-195326, paragraphs 0086 to 0098 of International Publication No. WO 2011/024896, and the like. Paragraphs 0063 to 0094 of International Publication No. 2012/102399, paragraph 0082 of International Publication No. 2017/038252, paragraph 0171 of JP-A-2015-151530, paragraphs 0162 to 0183 of JP-A-2011-252065, JP-A-2003-081972, Japanese Patent No. 5299151, JP-A-2015-172732, JP-A-2014-199308, JP-A-2014-085562, JP-A-2014-035351, JP-A-2008-081565, and compounds described in JP-A-2019-109512 are mentioned.

The coloring composition according to the present disclosure may contain one type of pigment derivative alone, or may contain two or more types of pigment derivatives.
The content of the pigment derivative is preferably 1 part by mass to 30 parts by mass, and more preferably 3 parts by mass to 20 parts by mass, based on 100 parts by mass of the pigment. Only one type of pigment derivative may be used, or two or more types may be used in combination.

<Photopolymerization initiator>
The coloring composition according to the present disclosure preferably contains a photopolymerization initiator. In particular, when the coloring composition according to the present disclosure contains a polymerizable compound, the coloring composition according to the present disclosure preferably further contains a photopolymerization initiator. In addition, the coloring composition according to the present disclosure is preferably a photosensitive coloring composition, and more preferably a negative type photosensitive coloring composition.
The photopolymerization initiator is not particularly limited and can be appropriately selected from known photopolymerization initiators. For example, a compound having photosensitivity to light rays in the ultraviolet to visible light range is preferred. The photopolymerization initiator is preferably a photoradical polymerization initiator.

Photopolymerization initiators include halogenated hydrocarbon derivatives (e.g., compounds having a triazine skeleton, compounds having an oxadiazole skeleton, etc.), acylphosphine compounds, hexaarylbiimidazoles, oxime compounds, organic peroxides, thio compounds, ketone compounds, aromatic onium salts, α-hydroxyketone compounds, α-aminoketone compounds, etc. From the viewpoint of exposure sensitivity, the photopolymerization initiator is preferably a compound selected from the group consisting of a trihalomethyltriazine compound, a benzyl dimethyl ketal compound, an α-hydroxyketone compound, an α-aminoketone compound, an acylphosphine compound, a phosphine oxide compound, a metallocene compound, an oxime compound, a triarylimidazole dimer, an onium compound, a benzothiazole compound, a benzophenone compound, an acetophenone compound, a cyclopentadiene-benzene-iron complex, a halomethyloxadiazole compound, and a 3-aryl substituted coumarin compound, more preferably a compound selected from the group consisting of an oxime compound, an α-hydroxyketone compound, an α-aminoketone compound, and an acylphosphine compound, and even more preferably an oxime compound, i.e., an oxime-based photopolymerization initiator. Further, the photopolymerization initiator includes the compounds described in paragraphs 0065 to 0111 of JP 2014-130173 A and JP 6301489 A, MATERIAL STAGE 37 to 60p, vol. 19, No. 3,2019 described peroxide-based photopolymerization initiators, photopolymerization initiators described in WO 2018/221177 A, photopolymerization initiators described in WO 2018/110179 A, photopolymerization initiators described in JP 2019-043864 A, photopolymerization initiators described in JP 2019-044030 A, and organic peroxides described in JP 2019-167313 A, the contents of which are incorporated herein.

Commercially available α-hydroxyketone compounds include Omnirad 184, Omnirad 1173, Omnirad 2959, Omnirad 127 (all manufactured by IGM Resins B.V.), Irgacure 184, Irgacure 1173, Irgacure 2959, Irgacure 127 (all manufactured by BASF), etc. Commercially available α-aminoketone compounds include Omnirad 907, Omnirad 369, Omnirad 369E, Omnirad 379EG (manufactured by IGM Resins B.V.), Irgacure 907, Irgacure 369, Irgacure 369E, Irgacure 379EG (manufactured by BASF), etc. Commercially available acylphosphine compounds include Omnirad 819, Omnirad TPO (manufactured by IGM Resins B.V.), Irgacure 819, Irgacure TPO (manufactured by BASF), etc.

Examples of oxime compounds include compounds described in JP-A-2001-233842, compounds described in JP-A-2000-080068, compounds described in JP-A-2006-342166, compounds described in J. C. S. Perkin II (1979, pp. 1653-1660), compounds described in J. C. S. Perkin II (1979, pp. 156-162), compounds described in Journal of Photopolymer Science and Technology (1995, pp.202-232) described compounds, compounds described in JP-A-2000-066385, compounds described in JP-A-2000-080068, compounds described in JP-T-2004-534797, compounds described in JP-A-2006-342166, compounds described in JP-A-2017-019766, compounds described in Japanese Patent No. 6065596, compounds described in WO 2015/152153, compounds described in WO 2017/051680, compounds described in JP-A-2017-198865, compounds described in paragraphs 0025 to 0038 of WO 2017/164127, compounds described in WO 2013/167515, and the like. Specific examples of the oxime compound include 3-benzoyloxyiminobutan-2-one, 3-acetoxyiminobutan-2-one, 3-propionyloxyiminobutan-2-one, 2-acetoxyiminopentan-3-one, 2-acetoxyimino-1-phenylpropan-1-one, 2-benzoyloxyimino-1-phenylpropan-1-one, 3-(4-toluenesulfonyloxy)iminobutan-2-one, and 2-ethoxycarbonyloxyimino-1-phenylpropan-1-one. Commercially available products include Irgacure OXE01, Irgacure OXE02, Irgacure OXE03, and Irgacure OXE04 (manufactured by BASF), TR-PBG-304 (manufactured by Changzhou Strong Electronic New Materials Co., Ltd.), and Adeka Optomer N-1919 (manufactured by ADEKA Corporation, photopolymerization initiator 2 described in JP-A-2012-014052). In addition, as the oxime compound, it is also preferable to use a compound that is not colorable or a compound that is highly transparent and does not easily discolor. Commercially available products include ADEKA Arcles NCI-730, NCI-831, and NCI-930 (manufactured by ADEKA Corporation).

As the photopolymerization initiator, an oxime compound having a fluorene ring can also be used. Specific examples of oxime compounds having a fluorene ring include the compounds described in JP 2014-137466 A.

As the photopolymerization initiator, an oxime compound having a skeleton in which at least one benzene ring of a carbazole ring is replaced with a naphthalene ring can also be used. Specific examples of such oxime compounds include the compounds described in WO 2013/083505.

As the photopolymerization initiator, an oxime compound having a fluorine atom can also be used. Specific examples of oxime compounds having a fluorine atom include the compounds described in JP-A-2010-262028, compounds 24, 36 to 40 described in JP-A-2014-500852, and compound (C-3) described in JP-A-2013-164471.

As the photopolymerization initiator, an oxime compound having a nitro group can be used. It is also preferable that the oxime compound having a nitro group is a dimer. Specific examples of oxime compounds having a nitro group include the compounds described in paragraphs 0031 to 0047 of JP 2013-114249 A, paragraphs 0008 to 0012 and 0070 to 0079 of JP 2014-137466 A, the compounds described in paragraphs 0007 to 0025 of Japanese Patent No. 4223071 A, and ADEKA ARCLES NCI-831 (manufactured by ADEKA Corporation).

As the photopolymerization initiator, an oxime compound having a benzofuran skeleton can also be used. Specific examples include OE-01 to OE-75 described in WO 2015/036910.

As a photopolymerization initiator, an oxime compound in which a substituent having a hydroxyl group is bonded to a carbazole skeleton can also be used. Examples of such photopolymerization initiators include the compounds described in WO 2019/088055.

Specific examples of oxime compounds that are preferably used in the present disclosure are shown below, but the present disclosure is not limited to these.

The oxime compound is preferably a compound having a maximum absorption wavelength in the wavelength range of 350 nm to 500 nm, more preferably a compound having a maximum absorption wavelength in the wavelength range of 360 nm to 480 nm. In addition, the molar absorption coefficient of the oxime compound at a wavelength of 365 nm or 405 nm is preferably high from the viewpoint of sensitivity, more preferably 1,000 to 300,000, even more preferably 2,000 to 300,000, and particularly preferably 5,000 to 200,000. The molar absorption coefficient of the compound can be measured using a known method. For example, it is preferable to measure using ethyl acetate at a concentration of 0.01 g/L using a spectrophotometer (Varian Cary-5 spectrophotometer).

As the photopolymerization initiator, a bifunctional or trifunctional or higher functional photoradical polymerization initiator may be used. By using such a photoradical polymerization initiator, two or more radicals are generated from one molecule of the photoradical polymerization initiator, so that good sensitivity can be obtained. In addition, when a compound having an asymmetric structure is used, the crystallinity is reduced and the solubility in a solvent or the like is improved, so that precipitation is less likely to occur over time, and the stability of the coloring composition over time can be improved. Specific examples of bifunctional or trifunctional or higher functional photoradical polymerization initiators include dimers of oxime compounds described in JP-T-2010-527339, JP-T-2011-524436, WO-P-2015/004565, paragraphs 0407 to 0412 of WO-P-2016-532675, and paragraphs 0039 to 0055 of WO-P-2017/033680, compound (E) and compound (G) described in WO-P-2013-522445, and WO-P-2015-00456 ... Examples of the photoinitiator include Cmpd1 to 7 described in JP 2016/034963 A, the oxime ester photoinitiator described in paragraph 0007 of JP-T 2017-523465 A, the photoinitiator described in paragraphs 0020 to 0033 of JP-A 2017-167399 A, the photopolymerization initiator (A) described in paragraphs 0017 to 0026 of JP-A 2017-151342 A, and the oxime ester photoinitiator described in Japanese Patent No. 6,469,669 A.

When the coloring composition according to the present disclosure contains a photopolymerization initiator, the content of the photopolymerization initiator in the total solid content of the coloring composition is preferably 0.1% by mass to 30% by mass. The lower limit is more preferably 0.5% by mass or more, and particularly preferably 1% by mass or more. The upper limit is more preferably 20% by mass or less, and particularly preferably 15% by mass or less. In the coloring composition according to the present disclosure, only one type of photopolymerization initiator may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is in the above range.

<Polymerizable Compound>
The coloring composition according to the present disclosure preferably contains a polymerizable compound. As the polymerizable compound, a known compound capable of being crosslinked by a radical, an acid, or heat can be used. In the present disclosure, the polymerizable compound is preferably, for example, a compound having an ethylenically unsaturated bond group. Examples of the ethylenically unsaturated bond group include a vinyl group, a (meth)allyl group, and a (meth)acryloyl group. The polymerizable compound used in the present disclosure is preferably a radical polymerizable compound.

The polymerizable compound may be in any chemical form, such as a monomer, prepolymer, or oligomer, but is preferably a monomer. The molecular weight of the polymerizable compound is preferably 100 to 3,000. The upper limit is more preferably 2,000 or less, and even more preferably 1,500 or less. The lower limit is more preferably 150 or more, and even more preferably 250 or more.

The polymerizable compound is preferably a compound containing 3 or more ethylenically unsaturated bond groups, more preferably a compound containing 3 to 15 ethylenically unsaturated bond groups, and even more preferably a compound containing 3 to 6 ethylenically unsaturated bond groups. The polymerizable compound is preferably a trifunctional to 15-functional (meth)acrylate compound, and more preferably a trifunctional to 6-functional (meth)acrylate compound. Specific examples of the polymerizable compound include compounds described in paragraphs 0095 to 0108 of JP 2009-288705 A, paragraph 0227 of JP 2013-029760 A, paragraphs 0254 to 0257 of JP 2008-292970 A, paragraphs 0034 to 0038 of JP 2013-253224 A, paragraph 0477 of JP 2012-208494 A, JP 2017-048367 A, Japanese Patent No. 6057891, and Japanese Patent No. 6031807, the contents of which are incorporated herein by reference.

Preferred polymerizable compounds include dipentaerythritol triacrylate (commercially available products include KAYARAD D-330, manufactured by Nippon Kayaku Co., Ltd.), dipentaerythritol tetraacrylate (commercially available products include KAYARAD D-320, manufactured by Nippon Kayaku Co., Ltd.), dipentaerythritol penta(meth)acrylate (commercially available products include KAYARAD D-310, manufactured by Nippon Kayaku Co., Ltd.), dipentaerythritol hexa(meth)acrylate (commercially available products include KAYARAD DPHA, manufactured by Nippon Kayaku Co., Ltd., and NK Ester A-DPH-12E, manufactured by Shin-Nakamura Chemical Co., Ltd.), and compounds in which the (meth)acryloyl groups are bonded via ethylene glycol and/or propylene glycol residues (e.g., SR454 and SR499, commercially available from Sartomer Corporation). Examples of the polymerizable compound that can be used include diglycerol EO (ethylene oxide) modified (meth)acrylate (commercially available product is M-460; manufactured by Toagosei Co., Ltd.), pentaerythritol tetraacrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., NK Ester A-TMMT), 1,6-hexanediol diacrylate (manufactured by Nippon Kayaku Co., Ltd., KAYARAD HDDA), RP-1040 (manufactured by Nippon Kayaku Co., Ltd.), Aronix TO-2349 (manufactured by Toagosei Co., Ltd.), NK Oligo UA-7200 (manufactured by Shin-Nakamura Chemical Co., Ltd.), 8UH-1006, 8UH-1012 (manufactured by Taisei Fine Chemical Co., Ltd.), and light acrylate POB-A0 (manufactured by Kyoeisha Chemical Co., Ltd.).

As the polymerizable compound, it is also preferable to use a trifunctional (meth)acrylate compound such as trimethylolpropane tri(meth)acrylate, trimethylolpropane propyleneoxy-modified tri(meth)acrylate, trimethylolpropane ethyleneoxy-modified tri(meth)acrylate, isocyanuric acid ethyleneoxy-modified tri(meth)acrylate, or pentaerythritol tri(meth)acrylate. Commercially available trifunctional (meth)acrylate compounds include ARONIX M-309, M-310, M-321, M-350, M-360, M-313, M-315, M-306, M-305, M-303, M-452, and M-450 (manufactured by Toagosei Co., Ltd.), NK Ester A9300, A-GLY-9E, A-GLY-20E, A-TMM-3, A-TMM-3L, A-TMM-3LM-N, A-TMPT, and TMPT (manufactured by Shin-Nakamura Chemical Co., Ltd.), KAYARAD GPO-303, TMPTA, THE-330, TPA-330, and PET-30 (manufactured by Nippon Kayaku Co., Ltd.).

As the polymerizable compound, a polymerizable compound having an acid group can also be used. By using a polymerizable compound having an acid group, the coloring composition in the unexposed area can be easily removed during development, and the generation of development residues can be suppressed. Examples of the acid group include a carboxy group, a sulfo group, and a phosphate group, and a carboxy group is preferred. Commercially available polymerizable compounds having an acid group include ARONIX M-510, M-520, and ARONIX TO-2349 (manufactured by Toagosei Co., Ltd.). The preferred acid value of the polymerizable compound having an acid group is 0.1 mgKOH/g to 40 mgKOH/g, and more preferably 5 mgKOH/g to 30 mgKOH/g. If the acid value of the polymerizable compound is 0.1 mgKOH/g or more, the solubility in the developer is good, and if it is 40 mgKOH/g or less, it is advantageous in terms of production and handling.

As the polymerizable compound, a polymerizable compound having a caprolactone structure can also be used. Polymerizable compounds having a caprolactone structure are commercially available, for example, from Nippon Kayaku Co., Ltd. as the KAYARAD DPCA series, and examples of such compounds include DPCA-20, DPCA-30, DPCA-60, and DPCA-120.

As the polymerizable compound, a polymerizable compound having an alkyleneoxy group can also be used. The polymerizable compound having an alkyleneoxy group is preferably a polymerizable compound having an ethyleneoxy group and/or a propyleneoxy group, more preferably a polymerizable compound having an ethyleneoxy group, and even more preferably a trifunctional to hexafunctional (meth)acrylate compound having 4 to 20 ethyleneoxy groups. Commercially available polymerizable compounds having an alkyleneoxy group include, for example, SR-494, a tetrafunctional (meth)acrylate having four ethyleneoxy groups manufactured by Sartomer, and KAYARAD TPA-330, a trifunctional (meth)acrylate having three isobutyleneoxy groups.

As the polymerizable compound, a polymerizable compound having a fluorene skeleton can also be used. Commercially available polymerizable compounds having a fluorene skeleton include OGSOL EA-0200 and EA-0300 (manufactured by Osaka Gas Chemicals Co., Ltd., (meth)acrylate monomers having a fluorene skeleton).

It is also preferable to use a polymerizable compound that is substantially free of environmentally regulated substances such as toluene. Commercially available products of such compounds include KAYARAD DPHA LT and KAYARAD DPEA-12 LT (manufactured by Nippon Kayaku Co., Ltd.).

As the polymerizable compound, it is also preferable to use urethane acrylates described in JP-B-48-041708, JP-A-51-037193, JP-B-02-032293, and JP-B-02-016765, urethane compounds having an ethylene oxide skeleton described in JP-B-58-049860, JP-B-56-017654, JP-B-62-039417, and JP-B-62-039418, and polymerizable compounds having an amino structure or sulfide structure in the molecule described in JP-A-63-277653, JP-A-63-260909, and JP-A-01-105238. In addition, as the polymerizable compound, commercially available products such as UA-7200 (manufactured by Shin-Nakamura Chemical Co., Ltd.), DPHA-40H (manufactured by Nippon Kayaku Co., Ltd.), UA-306H, UA-306T, UA-306I, AH-600, T-600, AI-600, and LINC-202UA (manufactured by Kyoeisha Chemical Co., Ltd.) can also be used.

When the coloring composition according to the present disclosure contains a polymerizable compound, the content of the polymerizable compound in the total solid content of the coloring composition is preferably 0.1% by mass to 50% by mass. The lower limit is more preferably 0.5% by mass or more, and even more preferably 1% by mass or more. The upper limit is more preferably 45% by mass or less, and even more preferably 40% by mass or less.

In addition, the total content of the polymerizable compound and the resin in the total solid content of the coloring composition is preferably 10% by mass to 65% by mass from the viewpoints of curability, developability, and film-forming property. The lower limit is more preferably 15% by mass or more, even more preferably 20% by mass or more, and particularly preferably 30% by mass or more. The upper limit is more preferably 60% by mass or less, even more preferably 50% by mass or less, and particularly preferably 40% by mass or less. In addition, it is preferable to contain 30 parts by mass to 300 parts by mass of the resin per 100 parts by mass of the polymerizable compound. The lower limit is more preferably 50 parts by mass or more, and particularly preferably 80 parts by mass or more. The upper limit is more preferably 250 parts by mass or less, and particularly preferably 200 parts by mass or less.

In the coloring composition according to the present disclosure, only one type of polymerizable compound may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is within the above range.

<Compound having a cyclic ether group>
The coloring composition according to the present disclosure may contain a compound having a cyclic ether group. Examples of the cyclic ether group include an epoxy group and an oxetanyl group. The compound having a cyclic ether group is preferably a compound having an epoxy group. Examples of the compound having an epoxy group include a compound having one or more epoxy groups in one molecule, and a compound having two or more epoxy groups is preferable. It is preferable that one molecule has 1 to 100 epoxy groups. The upper limit of the epoxy group can be, for example, 10 or less, or 5 or less. The lower limit of the epoxy group is preferably 2 or more. As the compound having an epoxy group, the compounds described in paragraphs 0034 to 0036 of JP-A-2013-011869, paragraphs 0147 to 0156 of JP-A-2014-043556, paragraphs 0085 to 0092 of JP-A-2014-089408, and the compounds described in JP-A-2017-179172 can also be used. The contents of these compounds are incorporated herein by reference.

The compound having an epoxy group may be either a low molecular weight compound (e.g., a molecular weight of less than 2,000, or even less than 1,000) or a high molecular weight compound (macromolecule) (e.g., a molecular weight of 1,000 or more, or in the case of a polymer, a weight average molecular weight of 1,000 or more). The weight average molecular weight of the compound having an epoxy group is preferably 200 to 100,000, more preferably 500 to 50,000. The upper limit of the weight average molecular weight is more preferably 10,000 or less, particularly preferably 5,000 or less, and most preferably 3,000 or less.

As a compound having an epoxy group, an epoxy resin can be preferably used. Examples of epoxy resins include epoxy resins which are glycidyl ethers of phenolic compounds, epoxy resins which are glycidyl ethers of various novolac resins, alicyclic epoxy resins, aliphatic epoxy resins, heterocyclic epoxy resins, glycidyl ester epoxy resins, glycidyl amine epoxy resins, epoxy resins obtained by glycidylating halogenated phenols, condensates of silicon compounds having epoxy groups and other silicon compounds, copolymers of polymerizable unsaturated compounds having epoxy groups and other polymerizable unsaturated compounds, etc. The epoxy equivalent of the epoxy resin is preferably 310 g/eq to 3,300 g/eq, more preferably 310 g/eq to 1,700 g/eq, and even more preferably 310 g/eq to 1,000 g/eq.

Commercially available examples of compounds having a cyclic ether group include EHPE3150 (manufactured by Daicel Corporation), EPICLON N-695 (manufactured by DIC Corporation), Marproof G-0150M, G-0105SA, G-0130SP, G-0250SP, G-1005S, G-1005SA, G-1010S, G-2050M, G-01100, and G-01758 (all manufactured by NOF Corporation, epoxy group-containing polymers).

When the coloring composition according to the present disclosure contains a compound having a cyclic ether group, the content of the compound having a cyclic ether group in the total solid content of the coloring composition is preferably 0.1% by mass to 20% by mass. The lower limit is more preferably 0.5% by mass or more, and particularly preferably 1% by mass or more. The upper limit is more preferably 15% by mass or less, and particularly preferably 10% by mass or less. In the coloring composition according to the present disclosure, only one type of compound having a cyclic ether group may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is in the above range.

<Silane coupling agent>
The coloring composition according to the present disclosure may contain a silane coupling agent. According to this aspect, the adhesion of the obtained film to the support can be further improved. In the present disclosure, the silane coupling agent means a silane compound having a hydrolyzable group and a functional group other than the hydrolyzable group. In addition, the hydrolyzable group refers to a substituent that is directly bonded to a silicon atom and can generate a siloxane bond by at least one of a hydrolysis reaction and a condensation reaction. Examples of the hydrolyzable group include a halogen atom, an alkoxy group, and an acyloxy group, and an alkoxy group is preferable. That is, the silane coupling agent is preferably a compound having an alkoxysilyl group. In addition, examples of functional groups other than the hydrolyzable group include a vinyl group, a (meth)allyl group, a (meth)acryloyl group, a mercapto group, an epoxy group, an oxetanyl group, an amino group, a ureido group, a sulfide group, an isocyanate group, and a phenyl group, and an amino group, a (meth)acryloyl group, and an epoxy group are preferable. Specific examples of silane coupling agents include N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBM-602), N-β-aminoethyl-γ-aminopropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBM-603), N-β-aminoethyl-γ-aminopropyltriethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBE-602), γ-aminopropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBM-903), γ-aminopropyltriethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBE-903), 3-methacryloxypropylmethyldimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBM-502), and 3-methacryloxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBM-503). Specific examples of the silane coupling agent include the compounds described in paragraphs 0018 to 0036 of JP-A-2009-288703 and the compounds described in paragraphs 0056 to 0066 of JP-A-2009-242604, the contents of which are incorporated herein by reference.

When the coloring composition according to the present disclosure contains a silane coupling agent, the content of the silane coupling agent in the total solid content of the coloring composition is preferably 0.1% by mass to 5% by mass. The upper limit is more preferably 3% by mass or less, and particularly preferably 2% by mass or less. The lower limit is more preferably 0.5% by mass or more, and particularly preferably 1% by mass or more. In the coloring composition according to the present disclosure, only one type of silane coupling agent may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is in the above range.

<Solvent>
The coloring composition according to the present disclosure contains a solvent.
The solvent is preferably an organic solvent.
Examples of organic solvents include ester solvents, ketone solvents, alcohol solvents, amide solvents, ether solvents, and hydrocarbon solvents. For details, see paragraph 0223 of International Publication No. 2015/166779, the contents of which are incorporated herein by reference. In addition, ester solvents substituted with a cyclic alkyl group and ketone solvents substituted with a cyclic alkyl group can also be preferably used. Specific examples of organic solvents include polyethylene glycol monomethyl ether, dichloromethane, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl cellosolve acetate, ethyl lactate, diethylene glycol dimethyl ether, butyl acetate, methyl 3-methoxypropionate, 2-heptanone, cyclohexanone, cyclohexyl acetate, cyclopentanone, ethyl carbitol acetate, butyl carbitol acetate, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, 3-methoxy-N,N-dimethylpropanamide, and 3-butoxy-N,N-dimethylpropanamide. However, there are cases where it is better to reduce the amount of aromatic hydrocarbons (benzene, toluene, xylene, ethylbenzene, etc.) used as organic solvents for environmental reasons, etc. (for example, the amount can be 50 ppm (parts per million) by mass or less, 10 ppm by mass or less, or 1 ppm by mass or less, relative to the total amount of organic solvents).

In the present disclosure, it is preferable to use an organic solvent with a low metal content, and the metal content of the organic solvent is preferably, for example, 10 parts per billion (ppb) by mass or less. If necessary, an organic solvent with a mass ppt (parts per trillion) level may be used, and such an organic solvent is provided, for example, by Toyo Gosei Co., Ltd. (The Chemical Daily, November 13, 2015).

Methods for removing impurities such as metals from organic solvents include, for example, distillation (molecular distillation, thin-film distillation, etc.) and filtration using a filter. The filter pore size of the filter used for filtration is preferably 10 μm or less, more preferably 5 μm or less, and even more preferably 3 μm or less. The filter material is preferably polytetrafluoroethylene, polyethylene, or nylon.

The organic solvent may contain isomers (compounds with the same number of atoms but different structures). In addition, the organic solvent may contain only one type of isomer or multiple types of isomers.

In the present disclosure, it is preferable that the peroxide content in the organic solvent is 0.8 mmol/L or less, and it is more preferable that the organic solvent is substantially free of peroxide.

The content of the organic solvent in the coloring composition is preferably 10% by mass to 95% by mass, more preferably 20% by mass to 90% by mass, and even more preferably 30% by mass to 90% by mass.

In addition, from the viewpoint of environmental regulations, it is preferable that the coloring composition according to the present disclosure does not substantially contain environmentally regulated substances. In this disclosure, substantially not containing environmentally regulated substances means that the content of environmentally regulated substances in the coloring composition is 50 ppm by mass or less, preferably 30 ppm by mass or less, more preferably 10 ppm by mass or less, and particularly preferably 1 ppm by mass or less. Examples of environmentally regulated substances include benzene; alkylbenzenes such as toluene and xylene; and halogenated benzenes such as chlorobenzene. These substances are registered as environmentally restricted substances under the REACH (Registration Evaluation Authorization and Restriction of Chemicals) Regulations, the PRTR (Pollutant Release and Transfer Register) Act, the VOC (Volatile Organic Compounds) Regulations, etc., and their usage and handling methods are strictly regulated. These compounds may be used as solvents when producing each component used in the colored composition according to the present disclosure, and may be mixed into the colored composition as a residual solvent. From the viewpoint of human safety and environmental consideration, it is preferable to reduce these substances as much as possible. As a method for reducing the environmentally restricted substances, a method of reducing the environmentally restricted substances by heating or reducing the pressure in the system to a temperature above the boiling point of the environmentally restricted substances and distilling off the environmentally restricted substances from the system can be mentioned. In addition, when a small amount of environmentally regulated substances is distilled off, it is useful to perform azeotropy with a solvent having a boiling point equivalent to that of the solvent in question in order to increase efficiency. In addition, when a compound having radical polymerizability is contained, a polymerization inhibitor or the like may be added and distilled off under reduced pressure in order to suppress crosslinking between molecules caused by the progress of radical polymerization reaction during distillation under reduced pressure. These distillation methods can be performed at any stage, such as the stage of raw materials, the stage of products obtained by reacting raw materials (for example, resin solutions or polyfunctional monomer solutions after polymerization), or the stage of colored compositions prepared by mixing these compounds.

From the viewpoint of environmental regulations, the use of perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts may be restricted. In the coloring composition according to the present disclosure, when the content of the above-mentioned compounds is reduced, the content of perfluoroalkylsulfonic acid (particularly perfluoroalkylsulfonic acid having 6 to 8 carbon atoms in the perfluoroalkyl group) and its salts, and perfluoroalkylcarboxylic acid (particularly perfluoroalkylcarboxylic acid having 6 to 8 carbon atoms in the perfluoroalkyl group) and its salts is preferably in the range of 0.01 ppb to 1,000 ppb, more preferably in the range of 0.05 ppb to 500 ppb, and even more preferably in the range of 0.1 ppb to 300 ppb, based on the total solid content of the coloring composition. The coloring composition according to the present disclosure may be substantially free of perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts. For example, a coloring composition that is substantially free of perfluoroalkylsulfonic acid and its salt, and perfluoroalkylcarboxylic acid and its salt may be selected by using a compound that can be a substitute for perfluoroalkylsulfonic acid and its salt, and a compound that can be a substitute for perfluoroalkylcarboxylic acid and its salt. Examples of compounds that can be a substitute for regulated compounds include compounds that are excluded from the scope of regulation due to the difference in the number of carbon atoms in the perfluoroalkyl group. However, the above content does not prevent the use of perfluoroalkylsulfonic acid and its salt, and perfluoroalkylcarboxylic acid and its salt. The coloring composition according to the present disclosure may contain perfluoroalkylsulfonic acid and its salt, and perfluoroalkylcarboxylic acid and its salt within the maximum allowable range.

<Polymerization inhibitor>
The coloring composition according to the present disclosure may contain a polymerization inhibitor. Examples of the polymerization inhibitor include hydroquinone, p-methoxyphenol, di-tert-butyl-p-cresol, pyrogallol, tert-butylcatechol, benzoquinone, 4,4'-thiobis(3-methyl-6-tert-butylphenol), 2,2'-methylenebis(4-methyl-6-t-butylphenol), and N-nitrosophenylhydroxyamine salts (ammonium salts, cerous salts, etc.). Among these, p-methoxyphenol is preferred. The content of the polymerization inhibitor in the total solid content of the coloring composition is preferably 0.0001% by mass to 5% by mass.

<Surfactant>
The coloring composition according to the present disclosure may contain a surfactant. As the surfactant, various surfactants such as fluorine-based surfactants, nonionic surfactants, cationic surfactants, anionic surfactants, and silicone-based surfactants may be used. As the surfactant, the surfactants described in paragraphs 0238 to 0245 of WO 2015/166779 may be mentioned, the contents of which are incorporated herein by reference.

In the present disclosure, the surfactant is preferably a fluorosurfactant. By including a fluorosurfactant in the coloring composition, the liquid properties (particularly, fluidity) can be further improved, and liquid saving can be further improved. In addition, a film with less unevenness in thickness can be formed.

The fluorine content in the fluorosurfactant is preferably 3% by mass to 40% by mass, more preferably 5% by mass to 30% by mass, and particularly preferably 7% by mass to 25% by mass. Fluorine surfactants with a fluorine content within this range are effective in terms of uniformity of the coating film thickness and liquid saving, and also have good solubility in the coloring composition.

Examples of fluorine-based surfactants include those described in paragraphs 0060 to 0064 of JP 2014-041318 A (corresponding paragraphs 0060 to 0064 of WO 2014/017669 A) and those described in paragraphs 0117 to 0132 of JP 2011-132503 A, the contents of which are incorporated herein by reference. Commercially available fluorine-based surfactants include, for example, Megafac F171, F172, F173, F176, F177, F141, F142, F143, F144, R30, F437, F475, F479, F482, F554, F780, EXP, and MFS-330 (all manufactured by DIC Corporation), Fluorad FC430, FC431, and FC171 (all manufactured by Sumitomo 3M Limited), Surflon S-382, SC-101, SC-103, SC-104, SC-105, SC-1068, SC-381, SC-383, S-393, and KH-40 (all manufactured by AGC Corporation), and PolyFox Examples of such polysiloxanes include PF636, PF656, PF6320, PF6520, and PF7002 (all manufactured by OMNOVA).

In addition, acrylic compounds that have a molecular structure with a functional group containing a fluorine atom and that volatilize the fluorine atom when heated due to cleavage of the functional group containing the fluorine atom can also be suitably used as the fluorosurfactant. Examples of such fluorosurfactants include the Megafac DS series manufactured by DIC Corporation (The Chemical Daily (February 22, 2016), Nikkei Business Daily (February 23, 2016)), such as Megafac DS-21.

It is also preferable to use a polymer of a fluorine atom-containing vinyl ether compound having a fluorinated alkyl group or a fluorinated alkylene ether group and a hydrophilic vinyl ether compound as the fluorine-based surfactant. For such a fluorine-based surfactant, see JP 2016-216602 A, the contents of which are incorporated herein by reference.

The fluorosurfactant may be a block polymer. For example, the compounds described in JP 2011-089090 A may be mentioned. As the fluorosurfactant, a fluorine-containing polymer compound containing a repeating unit derived from a (meth)acrylate compound having a fluorine atom and a repeating unit derived from a (meth)acrylate compound having two or more (preferably five or more) alkyleneoxy groups (preferably ethyleneoxy groups, propyleneoxy groups) may also be preferably used. In addition, the fluorine-containing surfactants described in paragraphs 0016 to 0037 of JP 2010-032698 A and the following compounds are also exemplified as the fluorosurfactant used in the present disclosure.

The weight average molecular weight of the above compounds is preferably 3,000 to 50,000, for example 14,000. In the above compounds, the percentage indicating the proportion of repeating units is mol%.

In addition, the fluorosurfactant may be a fluorine-containing polymer having an ethylenically unsaturated bond group in the side chain. Specific examples include the compounds described in paragraphs 0050 to 0090 and 0289 to 0295 of JP 2010-164965 A, such as Megafac RS-101, RS-102, RS-718K, and RS-72-K manufactured by DIC Corporation. In addition, the fluorosurfactant may be the compounds described in paragraphs 0015 to 0158 of JP 2015-117327 A.

Nonionic surfactants include glycerol, trimethylolpropane, trimethylolethane and their ethoxylates and propoxylates (e.g., glycerol propoxylate, glycerol ethoxylate, etc.), polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene nonylphenyl ether, polyethylene glycol dilaurate, polyethylene glycol distearate, and sorbitan fat. Acid esters, Pluronic L10, L31, L61, L62, 10R5, 17R2, 25R2 (manufactured by BASF), Tetronic 304, 701, 704, 901, 904, 150R1 (manufactured by BASF), Solsperse 20000 (manufactured by Lubrizol Japan Co., Ltd.), NCW-101, NCW-1001, NCW-1002 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), Paionin D-6112, D-6112-W, D-6315 (manufactured by Takemoto Oil Co., Ltd.), Olfine E1010, Surfynol 104, 400, 440 (manufactured by Nissin Chemical Industry Co., Ltd.), and the like.

Examples of silicone surfactants include Toray Silicone DC3PA, Toray Silicone SH7PA, Toray Silicone DC11PA, Toray Silicone SH21PA, Toray Silicone SH28PA, Toray Silicone SH29PA, Toray Silicone SH30PA, Toray Silicone SH8400 (all manufactured by Dow Corning Toray Co., Ltd.), TSF-4440, TSF-4300, TSF-4445, TSF-4460, TSF-4452 (all manufactured by Momentive Performance Materials), KP-341, KF-6001, KF-6002 (all manufactured by Shin-Etsu Silicone Co., Ltd.), BYK307, BYK323, BYK330 (all manufactured by BYK-Chemie).

The content of the surfactant in the total solid content of the coloring composition is preferably 0.001% by mass to 5.0% by mass, and more preferably 0.005% by mass to 3.0% by mass. In the coloring composition according to the present disclosure, only one type of surfactant may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is within the above range.

<Ultraviolet absorbing agent>
The coloring composition according to the present disclosure may contain an ultraviolet absorber. Examples of the ultraviolet absorber include conjugated diene compounds, aminodiene compounds, salicylate compounds, benzophenone compounds, benzotriazole compounds, acrylonitrile compounds, hydroxyphenyltriazine compounds, indole compounds, and triazine compounds. For details, compounds described in paragraphs 0052 to 0072 of JP-A-2012-208374, paragraphs 0317 to 0334 of JP-A-2013-068814, and paragraphs 0061 to 0080 of JP-A-2016-162946 are mentioned, the contents of which are incorporated herein by reference. Examples of commercially available ultraviolet absorbers include UV-503 (manufactured by Daito Chemical Co., Ltd.). Examples of benzotriazole compounds include the MYUA series (The Chemical Daily, February 1, 2016) manufactured by Miyoshi Oil & Fat Co., Ltd. In addition, the compounds described in paragraphs 0049 to 0059 of Japanese Patent No. 6268967 can also be used as the ultraviolet absorbing agent.

The content of the ultraviolet absorber in the total solid content of the coloring composition is preferably 0.01% by mass to 10% by mass, more preferably 0.01% by mass to 5% by mass. In the coloring composition according to the present disclosure, only one type of ultraviolet absorber may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is within the above range.

<Antioxidants>
The coloring composition according to the present disclosure may contain an antioxidant. Examples of the antioxidant include phenolic compounds, phosphite compounds, and thioether compounds. As the phenolic compound, any phenolic compound known as a phenolic antioxidant may be used. A preferred phenolic compound is a hindered phenolic compound. A compound having a substituent at the site (ortho position) adjacent to the phenolic hydroxy group is preferred. As the aforementioned substituent, a substituted or unsubstituted alkyl group having 1 to 22 carbon atoms is preferred. In addition, the antioxidant is also preferably a compound having a phenolic group and a phosphite group in the same molecule. In addition, a phosphorus-based antioxidant may also be suitably used as the antioxidant. Examples of phosphorus-based antioxidants include tris[2-[[2,4,8,10-tetrakis(1,1-dimethylethyl)dibenzo[d,f][1,3,2]dioxaphosphepin-6-yl]oxy]ethyl]amine, tris[2-[(4,6,9,11-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepin-2-yl)oxy]ethyl]amine, and ethyl bis(2,4-di-tert-butyl-6-methylphenyl)phosphite. Commercially available antioxidants include, for example, Adeka STAB AO-20, Adeka STAB AO-30, Adeka STAB AO-40, Adeka STAB AO-50, Adeka STAB AO-50F, Adeka STAB AO-60, Adeka STAB AO-60G, Adeka STAB AO-80, and Adeka STAB AO-330 (manufactured by ADEKA CORPORATION). In addition, the antioxidant may be a compound described in paragraphs 0023 to 0048 of Japanese Patent No. 6268967, a compound described in Korean Patent Publication No. 10-2019-0059371, or the like.

The content of the antioxidant in the total solid content of the coloring composition is preferably 0.01% by mass to 20% by mass, and more preferably 0.3% by mass to 15% by mass. In the coloring composition according to the present disclosure, only one type of antioxidant may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is within the above range.

<Other ingredients>
The coloring composition according to the present disclosure may contain, as necessary, a sensitizer, a curing accelerator, a filler, a heat curing accelerator, a plasticizer, and other auxiliaries (e.g., conductive particles, fillers, defoamers, flame retardants, leveling agents, peeling accelerators, fragrances, surface tension adjusters, chain transfer agents, etc.). By appropriately incorporating these components, it is possible to adjust the properties such as film properties. For these components, for example, the description in paragraphs 0183 and onward of JP-A-2012-003225 (corresponding to paragraph 0237 of US Patent Application Publication No. 2013/0034812), the description in paragraphs 0101 to 0104, 0107 to 0109, etc. of JP-A-2008-250074 can be taken into consideration, and the contents of these are incorporated herein. In addition, the coloring composition according to the present disclosure may contain, as necessary, a latent antioxidant. Examples of the latent antioxidant include compounds in which the site functioning as an antioxidant is protected by a protecting group, and the protecting group is removed by heating at 100 ° C. to 250 ° C., or by heating at 80 ° C. to 200 ° C. in the presence of an acid / base catalyst, and the compound functions as an antioxidant. Examples of the latent antioxidant include compounds described in WO 2014/021023, WO 2017/030005, and JP 2017-008219 A. Examples of commercially available latent antioxidants include Adeka Arcles GPA-5001 (manufactured by ADEKA Corporation). In addition, as described in JP 2018-155881 A, C.I. Pigment Yellow 129 may be added for the purpose of improving weather resistance.

The coloring composition according to the present disclosure may contain a metal oxide in order to adjust the refractive index of the resulting film. Examples of the metal oxide include TiO ₂ , ZrO ₂ , Al ₂ O ₃ , and SiO _2. The primary particle size of the metal oxide is preferably 1 nm to 100 nm, more preferably 3 nm to 70 nm, and particularly preferably 5 nm to 50 nm. The metal oxide may have a core-shell structure. In this case, the core may be hollow.

The coloring composition according to the present disclosure may also contain a light resistance improver. Examples of the light resistance improver include the compounds described in paragraphs 0036 to 0037 of JP-A-2017-198787, the compounds described in paragraphs 0029 to 0034 of JP-A-2017-146350, the compounds described in paragraphs 0036 to 0037 and 0049 to 0052 of JP-A-2017-129774, the compounds described in paragraphs 0031 to 0034 and 0058 to 0059 of JP-A-2017-129674, the compounds described in paragraphs 0036 to 0037 and 0051 to 0054 of JP-A-2017-122803, the compounds described in paragraphs 0025 to 0039 of WO 2017/164127, and the compounds described in paragraphs 0025 to 0039 of JP-A-2017-186546. JP-A-2015-025116, JP-A-2012-145604, JP-A-2012-103475, JP-A-2012-103475, JP-A-2012-103475, JP-A-2011-257591, JP-A-2011-257591, JP-A-2011-191483, JP-A-2011-145668, JP-A-2011-145668, JP-A-2011-253174 ...7591, JP-A-2011-257591, JP-A-2011-257591, JP-A-2011-253174, JP-A-2011-253174, JP-A-2011-253174, JP-A-2011-253174, JP-A-2011-253174, JP-A-2011-253174,

The coloring composition according to the present disclosure preferably contains 100 ppm or less of free metal that is not bonded or coordinated to pigments, etc., more preferably 50 ppm or less, even more preferably 10 ppm or less, and particularly preferably contains substantially no free metal. According to this embodiment, it is possible to expect effects such as stabilization of pigment dispersibility (prevention of aggregation), improvement of spectral characteristics due to improved dispersibility, stabilization of curable components, prevention of conductivity fluctuation due to elution of metal atoms and metal ions, and improvement of display characteristics. In addition, the effects described in JP 2012-153796 A, JP 2000-345085 A, JP 2005-200560 A, JP 08-043620 A, JP 2004-145078 A, JP 2014-119487 A, JP 2010-083997 A, JP 2017-090930 A, JP 2018-025612 A, JP 2018-025797 A, JP 2017-155228 A, JP 2018-036521 A, and the like can be obtained. The types of the free metals include Na, K, Ca, Sc, Ti, Mn, Cu, Zn, Fe, Cr, Co, Mg, Al, Sn, Zr, Ga, Ge, Ag, Au, Pt, Cs, Ni, Cd, Pb, Bi, etc. In addition, the coloring composition according to the present disclosure preferably has a content of free halogen not bonded or coordinated with a pigment or the like of 100 ppm or less, more preferably 50 ppm or less, even more preferably 10 ppm or less, and particularly preferably substantially free. Examples of halogens include F, Cl, Br, I, and anions thereof. Methods for reducing free metals and halogens in the coloring composition include washing with ion-exchanged water, filtration, ultrafiltration, purification with ion-exchange resin, and the like.

The coloring composition according to the present disclosure may contain a dye. As the dye, a highly-known dye can be used, for example, the methine dyes described in JP-A-2019-73695, the methine dyes described in JP-A-2019-073696, the methine dyes described in JP-A-2019-73697, and the methine dyes described in JP-A-2019-73698.
The coloring composition according to the present disclosure may also use a dye multimer. The dye multimer is preferably a dye dissolved in a solvent for use. The dye multimer may also form particles. When the dye multimer is in the form of particles, it is usually used in a state of being dispersed in a solvent. The dye multimer in a particle state can be obtained, for example, by emulsion polymerization, and specific examples of the compounds and manufacturing methods described in JP-A-2015-214682 include those described in JP-A-2015-214682. The dye multimer has two or more dye structures in one molecule, and preferably has three or more dye structures. The upper limit is not particularly limited, but may be 100 or less. The multiple dye structures in one molecule may be the same dye structure or different dye structures. The weight average molecular weight (Mw) of the dye multimer is preferably 2,000 to 50,000. The lower limit is more preferably 3,000 or more, and even more preferably 6,000 or more. The upper limit is more preferably 30,000 or less, and even more preferably 20,000 or less. As the dye multimer, compounds described in JP-A-2011-213925, JP-A-2013-041097, JP-A-2015-028144, JP-A-2015-030742, WO 2016/031442, etc. can also be used.
The content of the dye is preferably less than the content of the pigment.

It is also preferred that the coloring composition according to the present disclosure is substantially free of terephthalic acid esters.

The water content of the coloring composition according to the present disclosure is preferably 3% by mass or less, more preferably 0.01% by mass to 1.5% by mass, and particularly preferably 0.1% by mass to 1.0% by mass. The water content can be measured by the Karl Fischer method.

The coloring composition according to the present disclosure can be used with its viscosity adjusted for the purpose of adjusting the film surface state (flatness, etc.), adjusting the film thickness, etc. The viscosity value can be appropriately selected as needed, but for example, 0.3 mPa·s to 50 mPa·s at 23°C is preferable, and 0.5 mPa·s to 20 mPa·s is more preferable. The viscosity can be measured, for example, using a viscometer RE85L (rotor: 1°34'×R24, measurement range 0.6 to 1,200 mPa·s) manufactured by Toki Sangyo Co., Ltd., with the temperature adjusted to 23°C.

When the colored composition according to the present disclosure is used as a color filter for a liquid crystal display device, the voltage retention rate of the liquid crystal display element equipped with the color filter is preferably 70% or more, and more preferably 90% or more. Known means for obtaining a high voltage retention rate can be appropriately incorporated, and typical means include the use of high purity materials (e.g., reduction of ionic impurities) and control of the amount of acid groups in the composition. The voltage retention rate can be measured, for example, by the method described in paragraph 0243 of JP-A-2011-008004 and paragraphs 0123 to 0129 of JP-A-2012-224847.

<Containment container>
The container for storing the colored composition according to the present disclosure is not particularly limited, and a known container can be used. In addition, it is also preferable to use a multi-layer bottle having an inner wall made of six types of six-layer resin or a bottle having a seven-layer structure made of six types of resin as the container, in order to suppress the incorporation of impurities into the raw materials or the colored composition. Examples of such containers include the containers described in JP-A-2015-123351. In addition, it is also preferable that the inner wall of the container is made of glass or stainless steel, in order to prevent metal elution from the inner wall of the container, increase the storage stability of the composition, and suppress component deterioration. The storage conditions for the colored composition according to the present disclosure are not particularly limited, and a conventionally known method can be used. In addition, the method described in JP-A-2016-180058 can also be used.

<Method of preparing coloring composition>
The coloring composition according to the present disclosure can be prepared by mixing the above-mentioned components. When preparing the coloring composition, all components may be simultaneously dissolved and/or dispersed in a solvent to prepare the coloring composition, or, if necessary, each component may be appropriately prepared as two or more solutions or dispersions, which are mixed at the time of use (at the time of application) to prepare the coloring composition.

It is also preferable to include a process for dispersing the pigment when preparing the coloring composition. In the process for dispersing the pigment, examples of mechanical forces used for dispersing the pigment include compression, squeezing, impact, shear, and cavitation. Specific examples of these processes include a bead mill, a sand mill, a roll mill, a ball mill, a paint shaker, a microfluidizer, a high-speed impeller, a sand grinder, a flow jet mixer, high-pressure wet atomization, and ultrasonic dispersion. In addition, in the grinding of the pigment in a sand mill (bead mill), it is preferable to use beads with a small diameter, increase the bead packing rate, and perform the process under conditions that increase the grinding efficiency. In addition, it is preferable to remove coarse particles by filtration, centrifugation, or the like after the grinding process. In addition, the process and dispersing machine for dispersing the pigment may be suitably used as described in "Dispersion Technology Encyclopedia, published by Joho Kiko Co., Ltd., July 15, 2005" or "Dispersion Technology and Industrial Application Practice Focusing on Suspension (Solid/Liquid Dispersion System) Comprehensive Data Collection, published by Management Development Center Publishing Department, October 10, 1978" and the process and dispersing machine described in paragraph 0022 of JP-A-2015-157893. In addition, in the process for dispersing the pigment, a particle refinement treatment may be performed in a salt milling process. For the materials, equipment, processing conditions, etc. used in the salt milling process, the descriptions in, for example, JP-A-2015-194521 and JP-A-2012-046629 may be referred to.

In preparing the coloring composition, it is preferable to filter the coloring composition with a filter for the purpose of removing foreign matter and reducing defects. Any filter that has been conventionally used for filtering purposes can be used without any particular limitation. Examples of the filter include filters made of materials such as fluororesins such as polytetrafluoroethylene (PTFE), polyamide resins such as nylon (e.g., nylon-6, nylon-6,6), and polyolefin resins (including high-density and ultra-high-molecular-weight polyolefin resins) such as polyethylene and polypropylene (PP). Among these materials, polypropylene (including high-density polypropylene) and nylon are preferred.

The pore size of the filter is preferably 0.01 μm to 7.0 μm, more preferably 0.01 μm to 3.0 μm, and even more preferably 0.05 μm to 0.5 μm. If the pore size of the filter is within the above range, fine foreign matter can be removed more reliably. The nominal value of the filter manufacturer can be referred to for the pore size value of the filter. Various filters provided by Nippon Pole Co., Ltd. (DFA4201NIEY, etc.), Advantech Toyo Co., Ltd., Nippon Integris Co., Ltd. (formerly Nippon Microlith Co., Ltd.), Kitz Microfilter Co., Ltd., etc. can be used.

It is also preferable to use a fibrous filter material as the filter. Examples of fibrous filter materials include polypropylene fiber, nylon fiber, and glass fiber. Commercially available products include the SBP type series (SBP008, etc.), TPR type series (TPR002, TPR005, etc.), and SHPX type series (SHPX003, etc.) manufactured by Roki Techno Co., Ltd.

When using a filter, different filters (e.g., a first filter and a second filter) may be combined. In this case, filtration with each filter may be performed only once or two or more times. Filters with different pore sizes within the above-mentioned range may be combined. Filtration with the first filter may be performed only on the dispersion liquid, and filtration with the second filter may be performed after mixing with other components.

(Cured product)
The cured product according to the present disclosure is a cured product obtained by drying or curing the colored composition according to the present disclosure. In the present disclosure, the cured product also includes a dried product in which the colored composition according to the present disclosure is dried to remove at least a part of the solvent contained therein and loses fluidity. In addition, drying may be performed before curing to form a cured product.
The cured product according to the present disclosure can be suitably used for color filters, etc. Specifically, it can be suitably used as a colored layer (pixel) of a color filter, and more specifically, it can be suitably used as a red colored layer (red pixel) of a color filter.
The cured product according to the present disclosure is preferably a film-like cured product, and its film thickness can be appropriately adjusted according to the purpose. For example, the film thickness is preferably 20 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less. The lower limit of the film thickness is preferably 0.1 μm or more, more preferably 0.2 μm or more, and even more preferably 0.3 μm or more.

(Color Filter)
Next, the color filter according to the present disclosure will be described. The color filter according to the present disclosure includes the cured product according to the present disclosure described above. More preferably, the color filter has the cured film according to the present disclosure as a pixel. The color filter according to the present disclosure can be used in solid-state imaging devices such as CCDs (charge-coupled devices) and CMOSs (complementary metal-oxide semiconductors) and image display devices.

In the color filter according to the present disclosure, the film thickness of the film according to the present disclosure can be appropriately adjusted depending on the purpose. The film thickness is preferably 20 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less. The lower limit of the film thickness is preferably 0.1 μm or more, more preferably 0.2 μm or more, and even more preferably 0.3 μm or more.

In the color filter according to the present disclosure, the pixel width is preferably 0.5 μm to 20.0 μm. The lower limit is more preferably 1.0 μm or more, and particularly preferably 2.0 μm or more. The upper limit is more preferably 15.0 μm or less, and particularly preferably 10.0 μm or less. The Young's modulus of the pixel is preferably 0.5 GPa to 20 GPa, and more preferably 2.5 GPa to 15 GPa.

Each pixel included in the color filter according to the present disclosure preferably has high flatness. Specifically, the surface roughness Ra of the pixel is preferably 100 nm or less, more preferably 40 nm or less, and even more preferably 15 nm or less. Although the lower limit is not specified, it is preferably 0.1 nm or more, for example. The surface roughness of the pixel can be measured using, for example, an AFM (atomic force microscope) Dimension 3100 manufactured by Veeco. In addition, the contact angle of water on the pixel can be set to an appropriate preferred value, but is typically in the range of 50° to 110°. The contact angle can be measured using, for example, a contact angle meter CV-DT-A type (manufactured by Kyowa Interface Science Co., Ltd.). In addition, it is preferable that the volume resistance value of the pixel is high. Specifically, the volume resistance value of the pixel is preferably 10 ⁹ Ω·cm or more, more preferably 10 ¹¹ Ω·cm or more. Although the upper limit is not specified, it is preferably 10 ¹⁴ Ω·cm or less, for example. The volume resistance of the pixel can be measured, for example, by using an ultra-high resistance meter 5410 (manufactured by Advantest Corporation).

In addition, the color filter according to the present disclosure may have a protective layer on the surface of the film according to the present disclosure. By providing a protective layer, various functions such as oxygen blocking, low reflection, hydrophilicity/hydrophobicity, and shielding of light of a specific wavelength (ultraviolet rays, near infrared rays, etc.) can be imparted. The thickness of the protective layer is preferably 0.01 μm to 10 μm, and more preferably 0.1 μm to 5 μm. Examples of methods for forming the protective layer include a method of forming the protective layer by applying a resin composition dissolved in an organic solvent, a chemical vapor deposition method, and a method of attaching a molded resin with an adhesive. The components constituting the protective layer include (meth)acrylic resin, ene-thiol resin, polycarbonate resin, polyether resin, polyarylate resin, polysulfone resin, polyethersulfone resin, polyphenylene resin, polyarylene ether phosphine oxide resin, polyimide resin, polyamideimide resin, polyolefin resin, cyclic olefin resin, polyester resin, styrene resin, polyol resin, polyvinylidene chloride resin, melamine resin, urethane resin, aramid resin, polyamide resin, alkyd resin, epoxy resin, modified silicone resin, fluorine resin, polycarbonate resin, polyacrylonitrile resin, cellulose resin, Si, C, W, Al ₂ O ₃ , Mo, SiO ₂ , Si ₂ N ₄ , etc., and may contain two or more of these components. For example, in the case of a protective layer intended for oxygen blocking, the protective layer preferably contains a polyol resin, SiO ₂ , and Si ₂ N ₄ . In the case of a protective layer intended to reduce reflection, the protective layer preferably contains a (meth)acrylic resin and a fluorine resin.

When forming a protective layer by applying a resin composition, known methods such as spin coating, casting, screen printing, and inkjet can be used as a method for applying the resin composition. Known organic solvents (e.g., propylene glycol 1-monomethyl ether 2-acetate, cyclopentanone, ethyl lactate, etc.) can be used as the organic solvent contained in the resin composition. When forming a protective layer by chemical vapor deposition, known chemical vapor deposition methods (thermal chemical vapor deposition, plasma chemical vapor deposition, photochemical vapor deposition) can be used as the chemical vapor deposition method.

The protective layer may contain additives such as organic particles, inorganic particles, absorbents for light of specific wavelengths (e.g., ultraviolet rays, near infrared rays, etc.), refractive index adjusters, antioxidants, adhesion agents, and surfactants, as necessary. Examples of organic particles and inorganic particles include polymer particles (e.g., silicone resin particles, polystyrene particles, melamine resin particles), titanium oxide, zinc oxide, zirconium oxide, indium oxide, aluminum oxide, titanium nitride, titanium oxynitride, magnesium fluoride, hollow silica, silica, calcium carbonate, barium sulfate, etc. As an absorbent for light of specific wavelengths, known absorbents can be used. The content of these additives can be adjusted as appropriate, but is preferably 0.1% by mass to 70% by mass, and more preferably 1% by mass to 60% by mass, based on the total mass of the protective layer.

In addition, the protective layer described in paragraphs 0073 to 0092 of JP 2017-151176 A can also be used as the protective layer.

The color filter may have a base layer. The base layer may be formed, for example, using a composition obtained by removing a colorant such as a pigment from the coloring composition according to the present disclosure described above. The surface contact angle of the base layer is preferably 20° to 70° when measured with diiodomethane. Also, it is preferably 30° to 80° when measured with water. If the surface contact angle of the base layer is within the above range, the coloring composition has good wettability. The surface contact angle of the base layer can be adjusted, for example, by adding a surfactant.

<Manufacturing method of color filter>
Next, a method for producing a color filter using the coloring composition according to the present disclosure will be described. The method for producing a color filter can be produced through a step of forming a coloring composition layer on a support using the coloring composition according to the present disclosure described above, and a step of forming a pattern on the coloring composition layer by a photolithography method or a dry etching method. The coloring composition according to the present disclosure can also suppress the generation of development residues, so it is particularly effective in the case of producing a color filter by forming a pattern on the coloring composition layer by a photolithography method.

- Photolithography method -
First, a case of manufacturing a color filter by forming a pattern by photolithography will be described. This manufacturing method preferably includes a step of forming a colored composition layer on a support using the colored composition according to the present disclosure, a step of exposing the colored composition layer in a pattern, and a step of developing and removing the unexposed part of the colored composition layer to form a pattern (pixel). If necessary, a step of baking the colored composition layer (pre-baking step) and a step of baking the developed pattern (pixel) (post-baking step) may be provided.

In the step of forming the coloring composition layer, the coloring composition layer is formed on a support using the coloring composition according to the present disclosure. The support is not particularly limited and can be appropriately selected according to the application. For example, a glass substrate, a silicon substrate, etc. can be mentioned, and a silicon substrate is preferable. In addition, a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS), a transparent conductive film, etc. may be formed on the silicon substrate. In addition, a black matrix that isolates each pixel may be formed on the silicon substrate. In addition, a base layer may be provided on the silicon substrate to improve adhesion with the upper layer, prevent diffusion of substances, or flatten the substrate surface. The base layer may be formed using a composition obtained by removing the colorant from the coloring composition described in this specification, or a composition containing the resin, polymerizable compound, surfactant, etc. described in this specification.

As a method for applying the coloring composition, a known method can be used. For example, a dropping method (drop casting); a slit coating method; a spray method; a roll coating method; a rotary coating method (spin coating); a casting coating method; a slit and spin method; a pre-wetting method (for example, a method described in JP-A-2009-145395); various printing methods such as ejection printing such as inkjet (for example, on-demand method, piezo method, thermal method), nozzle jet, flexographic printing, screen printing, gravure printing, reverse offset printing, and metal mask printing; a transfer method using a mold, etc.; and a nanoimprint method. The application method in inkjet is not particularly limited, and for example, the method shown in "Spreading and Usable Inkjet-Infinite Possibilities Seen in Patents-, published in February 2005, Sumibe Techno Research" (particularly pages 115 to 133), JP 2003-262716 A, JP 2003-185831 A, JP 2003-261827 A, JP 2012-126830 A, JP 2006-169325 A, etc. can be mentioned. In addition, for the application method of the coloring composition, the descriptions in WO 2017/030174 and WO 2017/018419 can be taken into consideration, and the contents of these are incorporated herein.

The coloring composition layer formed on the support may be dried (prebaked). When a film is produced by a low-temperature process, prebaking may not be performed. When prebaking is performed, the prebaking temperature is preferably 150°C or less, more preferably 120°C or less, and even more preferably 110°C or less. The lower limit can be, for example, 50°C or more, and can also be 80°C or more. The prebaking time is preferably 10 seconds to 300 seconds, more preferably 40 seconds to 250 seconds, and even more preferably 80 seconds to 220 seconds. Prebaking can be performed using a hot plate, an oven, etc.

<<Exposure process>>
Next, the colored composition layer is exposed to light in a pattern (exposure step). For example, the colored composition layer can be exposed to light in a pattern by using a stepper exposure machine or a scanner exposure machine through a mask having a predetermined mask pattern. This allows the exposed portion to be cured.

Examples of radiation (light) that can be used for exposure include g-line and i-line. Light with a wavelength of 300 nm or less (preferably light with a wavelength of 180 nm to 300 nm) can also be used. Examples of light with a wavelength of 300 nm or less include KrF line (wavelength 248 nm) and ArF line (wavelength 193 nm), with KrF line (wavelength 248 nm) being preferred. Long-wavelength light sources of 300 nm or more can also be used.

In addition, the exposure may be performed by irradiating the light continuously or in pulses (pulse exposure). Pulse exposure is an exposure method in which light is irradiated and paused repeatedly in a short cycle (e.g., milliseconds or less).

The irradiation amount (exposure amount) is, for example, preferably 0.03 J/cm ² to 2.5 J/cm ² , more preferably 0.05 J/cm ² to 1.0 J/cm ^2. The oxygen concentration during exposure can be appropriately selected, and in addition to being performed under air, exposure may be performed under a low-oxygen atmosphere with an oxygen concentration of 19 volume% or less (e.g., 15 volume%, 5 volume%, or substantially oxygen-free), or under a high-oxygen atmosphere with an oxygen concentration of more than 21 volume% (e.g., 22 volume%, 30 volume%, or 50 volume%). The exposure illuminance can be appropriately set, and can be preferably selected from the range of 1,000 W/m ² to 100,000 W/m ² (e.g., 5,000 W/m ² , 15,000 W/m ² , or 35,000 W/m ² ). The oxygen concentration and exposure illuminance may be appropriately combined. For example, an oxygen concentration of 10% by volume and an illuminance of 10,000 W/m ² , and an oxygen concentration of 35% by volume and an illuminance of 20,000 W/m ² , can be used.

Next, the unexposed parts of the coloring composition layer are developed and removed to form a pattern (pixels). The unexposed parts of the coloring composition layer can be developed and removed using a developer. As a result, the coloring composition layer in the unexposed parts in the exposure process dissolves into the developer, and only the photocured parts remain. As the developer, an organic alkaline developer that does not cause damage to the underlying elements or circuits is preferred. The temperature of the developer is preferably, for example, 20°C to 30°C. The development time is preferably 20 seconds to 180 seconds. In addition, in order to improve the removability of residues, the process of shaking off the developer every 60 seconds and then supplying new developer may be repeated several times.

Examples of the developer include organic solvents and alkaline developers, and alkaline developers are preferably used. As the alkaline developer, an alkaline aqueous solution (alkaline developer) in which an alkaline agent is diluted with pure water is preferred. Examples of the alkaline agent include organic alkaline compounds such as ammonia, ethylamine, diethylamine, dimethylethanolamine, diglycolamine, diethanolamine, hydroxylamine, ethylenediamine, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, ethyltrimethylammonium hydroxide, benzyltrimethylammonium hydroxide, dimethylbis(2-hydroxyethyl)ammonium hydroxide, choline, pyrrole, piperidine, and 1,8-diazabicyclo[5.4.0]-7-undecene, and inorganic alkaline compounds such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogencarbonate, sodium silicate, and sodium metasilicate. As the alkaline agent, compounds with a large molecular weight are preferred from the standpoint of environmental and safety. The concentration of the alkaline agent in the alkaline aqueous solution is preferably 0.001% by mass to 10% by mass, more preferably 0.01% by mass to 1% by mass. The developer may further contain a surfactant. Examples of the surfactant include the surfactants described above, and nonionic surfactants are preferred. The developer may be produced as a concentrated solution once and diluted to a required concentration when used, from the viewpoint of convenience of transportation and storage. The dilution ratio is not particularly limited, but can be set in the range of, for example, 1.5 to 100 times. It is also preferred to wash (rinse) with pure water after development. It is also preferred to rinse by supplying a rinsing liquid to the colored composition layer after development while rotating the support on which the colored composition layer after development has been formed. It is also preferred to perform the rinsing by moving the nozzle that ejects the rinsing liquid from the center of the support to the periphery of the support. In this case, the nozzle may be moved while gradually decreasing the moving speed of the nozzle when moving from the center of the support to the periphery. By performing the rinsing in this manner, the in-plane variation of the rinse can be suppressed. The same effect can also be obtained by gradually decreasing the rotation speed of the support while moving the nozzle from the center to the periphery of the support.

After development and drying, it is preferable to perform additional exposure treatment or heating treatment (post-baking). Additional exposure treatment and post-baking are curing treatments after development to complete curing. The heating temperature in post-baking is preferably, for example, 100°C to 240°C, more preferably 200°C to 240°C. Post-baking can be performed continuously or batchwise using a heating means such as a hot plate, a convection oven (hot air circulation dryer), or a high-frequency heater to ensure that the developed film meets the above conditions. When additional exposure treatment is performed, it is preferable that the light used for exposure has a wavelength of 400 nm or less. In addition, additional exposure treatment may be performed by the method described in Korean Patent Publication No. 10-2017-0122130.

- Dry etching method -
Next, a case where a color filter is manufactured by forming a pattern by a dry etching method will be described. The pattern formation by the dry etching method preferably includes a step of forming a colored composition layer on a support using the colored composition according to the present disclosure, curing the entire colored composition layer to form a cured layer, a step of forming a photoresist layer on the cured layer, a step of exposing the photoresist layer in a pattern shape and developing it to form a resist pattern, and a step of dry etching the cured layer using an etching gas with the resist pattern as a mask. In the formation of the photoresist layer, it is preferable to further perform a pre-bake treatment. In particular, as a process for forming the photoresist layer, a form in which a heat treatment after exposure and a heat treatment after development (post-bake treatment) are performed is desirable. For the pattern formation by the dry etching method, the description in paragraphs 0010 to 0067 of JP 2013-064993 A can be referred to, and the contents thereof are incorporated herein.

(Solid-state imaging element)
The solid-state imaging device according to the present disclosure preferably has the cured product according to the present disclosure and the color filter according to the present disclosure described above. The configuration of the solid-state imaging device according to the present disclosure is not particularly limited as long as it has the film according to the present disclosure and functions as a solid-state imaging device, and examples thereof include the following configurations.

The substrate has a plurality of photodiodes constituting a light receiving area of a solid-state imaging device (such as a CCD (charge-coupled device) image sensor or a CMOS (complementary metal oxide semiconductor) image sensor) and a transfer electrode made of polysilicon or the like, a light-shielding film with only the light receiving portion of the photodiodes open on the photodiodes and the transfer electrodes, a device protection film made of silicon nitride or the like formed on the light-shielding film so as to cover the entire light-shielding film and the light receiving portion of the photodiode, and a color filter on the device protection film. Furthermore, the device protection film may have a light-collecting means (e.g., a microlens, etc.; the same applies below) on the device protection film and below the color filter (on the side closer to the substrate), or a light-collecting means on the color filter. The color filter may have a structure in which each colored pixel is embedded in a space partitioned by partitions, for example, in a lattice shape. In this case, the partitions preferably have a lower refractive index than each colored pixel. Examples of imaging devices having such a structure include those described in JP 2012-227478 A, JP 2014-179577 A, WO 2018/043654 A, and U.S. Patent Application Publication No. 2018/0040656 A. An imaging device including a solid-state imaging element according to the present disclosure can be used for digital cameras, electronic devices having an imaging function (such as mobile phones), as well as in-vehicle cameras and surveillance cameras.
In addition, as described in JP 2019-211559 A, the solid-state imaging element according to the present disclosure may have an ultraviolet absorbing layer (UV cut filter) in the structure of the solid-state imaging element, thereby improving the light resistance of the color filter.

(Image display device)
The image display device according to the present disclosure preferably has the cured product according to the present disclosure and the above-mentioned color filter according to the present disclosure. Examples of the image display device include liquid crystal display devices and organic electroluminescence display devices. The definition of the image display device and details of each image display device are described, for example, in "Electronic Display Devices (by Akio Sasaki, published by Kogyo Chosakai Co., Ltd. in 1990)" and "Display Devices (by Junsho Ibuki, published by Sangyo Tosho Co., Ltd. in 1989)". In addition, the liquid crystal display device is described, for example, in "Next Generation Liquid Crystal Display Technology (edited by Tatsuo Uchida, published by Kogyo Chosakai Co., Ltd. in 1994)". There is no particular limitation on the liquid crystal display device to which the present disclosure can be applied, and the present disclosure can be applied to various types of liquid crystal display devices described in the above "Next Generation Liquid Crystal Display Technology".

(Resin represented by formula (3))
The resin according to the present disclosure is a resin represented by the following formula (3).
The resin represented by the following formula (3) can be suitably used as a dispersant for dispersing pigments.

In formula (3), R ¹ 's each independently represent a divalent linking group, R ² 's each independently represent a hydrogen atom or a monovalent substituent, L ² 's represents a (n+1)-valent linking group, n's represents an integer of 1 to 10, m's represents an integer of 2 to 30, and P ² 's represents a polymer chain having an acid group and a structure represented by the following formula (2):

In formula (2), ^R3 represents a hydrogen atom or an alkyl group, ^X1 represents a monovalent substituent, and L represents an integer of 1 or more.

A preferred embodiment of the resin represented by formula (3) in the resin according to the present disclosure is the same as the preferred embodiment of the resin represented by formula (3) described above.
Moreover, a preferred embodiment of the structure represented by formula (2) in the resin according to the present disclosure is the same as the preferred embodiment of the structure represented by formula (2) described above.
The method for producing the resin represented by formula (3) in the resin according to the present disclosure is not particularly limited, but a production method including the above steps (i-1) and (i-2), or the above steps (ii-1) and (ii-2) is preferably used.
The method for producing the resin represented by formula (3) and the method for producing the resin including the above steps (i-1) and (i-2), or including the above steps (ii-1) and (ii-2), are the same as those described above, and preferred aspects are also the same.

The present disclosure will be described in detail below with reference to examples, but the present disclosure is not limited to these examples.
In the present examples, "%" and "parts" mean "% by mass" and "parts by mass", respectively, unless otherwise specified. In addition, in polymer compounds, unless otherwise specified, the molecular weight is the weight average molecular weight (Mw), and the ratio of the constitutional units is the mole percentage.
The weight average molecular weight (Mw) is a value measured in terms of polystyrene by gel permeation chromatography (GPC).
Furthermore, the resins A-1 to A-49 represented by formula (1) used in the examples are the same as the above-mentioned resins A-1 to A-49, respectively.

(Synthesis Example 1: Production of A-12)
27.6 parts by mass of propylene glycol monomethyl ether acetate (PGMEA) was introduced into the flask, 10.0 parts by mass of Light Ester HO-MS (N) (2-methacryloyloxyethyl succinate, manufactured by Kyoeisha Chemical Co., Ltd.), and 5.00 parts by mass of mercaptoethanol were introduced, and the mixture was heated to 90°C while flowing nitrogen into the flask. Furthermore, 0.302 parts by mass of V-601 (2,2'-azobis (2-methylpropionate) dimethyl, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was added, and the mixture was heated at the same temperature for 2 hours. Further, 0.302 parts by mass of V-601 was added, the mixture was heated to 90°C and heated for 3 hours, and the polymerization reaction was terminated.
Next, 73.5 parts by mass of caprolactone and 0.042 parts by mass of n-butyltin hydroxide were added to the obtained polymerization reaction product, and the mixture was heated and stirred at 90° C. for 2 hours and at 110° C. for 6 hours, and then PGMEA was added to obtain a solution with a solid content of 30% by mass.

(Synthesis Example 2: Production of A-48)
Into the flask, 30.6 parts by mass of propylene glycol monomethyl ether acetate (PGMEA) was introduced, 15.4 parts by mass of Light Ester HO-MS (N) (manufactured by Kyoeisha Chemical Co., Ltd.), and 5.00 parts by mass of mercaptohexanol were introduced, and the mixture was heated to 90°C while flowing nitrogen into the flask. Furthermore, 0.347 parts by mass of V-601 was added, and the mixture was heated at the same temperature for 2 hours. Further, 0.347 parts by mass of V-601 was added, and the mixture was heated to 90°C and heated for 3 hours to terminate the polymerization reaction.
Next, 47.6 parts by mass of caprolactone and 0.024 parts by mass of n-butyltin hydroxide were added to the obtained polymerization reaction product, and the mixture was heated and stirred at 90° C. for 2 hours and at 110° C. for 6 hours to complete the reaction.
Next, 9.57 parts by mass of 4HBAGE (4-hydroxybutyl acrylate glycidyl ether, manufactured by Mitsubishi Chemical Corporation) and 1.07 parts by mass of dodecyldimethylamine were added to the resulting reaction product, and the mixture was heated at 90° C. for 48 hours to terminate the reaction. PGMEA was added to obtain a solution with a solid content of 30% by mass.

(Synthesis Example 3: Production of A-1 to A-11 and A-13 to A-45)
A-1 to A-11 and A-13 to A-45 were prepared in the same manner as in Synthesis Example 1, except that the raw materials used were the corresponding mercapto compound having a hydroxy group, the ethylenically unsaturated compound, and the hydroxycarboxylic acid compound or the lactone compound.

(Synthesis Example 4: Production of A-47 to A-49)
A-47 to A-49 were prepared in the same manner as in Synthesis Example 2, except that the raw materials used were the corresponding mercapto compound having a hydroxy group, ethylenically unsaturated compound, hydroxycarboxylic acid compound or lactone compound, and ethylenically unsaturated compound having an epoxy group.

<Preparation of Dispersion G1>
As a green pigment (G pigment), 8.75 parts by mass of C.I. Pigment Green 58, 3.85 parts by mass of C.I. Pigment Yellow 185 as a yellow pigment (Y pigment), the derivatives described in Table 1 or Table 2 in the amounts described in Table 1 or Table 2 (not in dispersion G1), 11.55 parts by mass (equivalent to 3.465 parts by mass of solids) of resin A-1 (PGMEA solution with a solid content of 30%) as a resin, and 67.3 parts by mass of propylene glycol monomethyl ether acetate as a solvent were mixed, and then 230 parts by mass of zirconia beads having a diameter of 0.3 mm were added, and the dispersion treatment was performed for 5 hours using a paint shaker, and the beads were separated by filtration to produce dispersion G1.

<Preparation of Dispersions G2 to G63 and Comparative Dispersions GM1 and GM2>
Each dispersion was produced in the same manner as Dispersion G1, except that the type of resin, the type and blending amount of derivative, and the type of solvent were changed as shown in Table 1 or Table 2. The amount of solvent added in each dispersion was 67.3 parts by mass.

Details of the abbreviations in Tables 1 and 2 other than those mentioned above are shown below.
<Comparative Resin>
AM-1: Resin produced by the following method AM-2: Resin produced by the following method

- Manufacturing method of AM-1 -
62.6 parts by mass of 1-dodecanol, 287.4 parts by mass of ε-caprolactone, and 0.1 parts by mass of monobutyltin oxide were heated and stirred at 120° C. for 4 hours. Next, 64.5 parts by mass of trimellitic anhydride were added, and the mixture was reacted at 120° C. for 2 hours. Propylene glycol monomethyl ether acetate was added to adjust the solid content to 30%, and resin AM-1 having an acid value of 91 mgKOH/g and a weight average molecular weight of 1,200 was obtained.

- Manufacturing method of AM-2 -
A reaction vessel equipped with a gas inlet tube, a thermometer, a condenser, and a stirrer was charged with 75 parts by mass of methyl methacrylate, 75 parts by mass of n-butyl acrylate, and 68.1 parts by mass of propylene glycol monomethyl ether acetate (PGMEA), and the inside of the reaction vessel was replaced with nitrogen gas. The inside of the reaction vessel was heated to 70 ° C., 9 parts by mass of 3-mercapto-1,2-propanediol was added, and 0.18 parts by mass of AIBN (azobisisobutyronitrile) was further added, and the reaction was allowed to proceed for 12 hours. It was confirmed that 95% had reacted by measuring the solid content. Subsequently, 14.6 parts by mass of pyromellitic anhydride, 105.5 parts by mass of PGMEA, and 0.3 parts by mass of 1,8-diazabicyclo-[5.4.0]-7-undecene (DBU) as a reaction catalyst were added, and the reaction was allowed to proceed for 7 hours at 120 ° C. The reaction was terminated when it was confirmed by measuring the acid value that 98% or more of the acid anhydride had been half-esterified. PGMEA was added to adjust the solid content to 30%, and a resin (AM-2) having an acid value of 41 mgKOH/g and a weight average molecular weight of 8,800 was obtained.

<Derivatives (pigment derivatives)>
S-1 to S-4: The following compounds

<Solvent>
PGMEA: Propylene glycol monomethyl ether acetate PGME: Propylene glycol monomethyl ether

<Preparation of Dispersions G64 to G79>
Each dispersion was prepared in the same manner as for Dispersion G9, except that the types and blending amounts of the G pigment and Y pigment were changed as shown in Table 3 below.

Details of the abbreviations listed in Table 3 are shown below.
<Green pigment (G pigment)>
PG36: C. I. Pigment Green 36
PG58: C. I. Pigment Green 58
PG7: C. I. Pigment Green 7
PG59: C. I. Pigment Green 59
PG62: C. I. Pigment Green 62
PG63: C. I. Pigment Green 63

<Yellow pigment (Y pigment)>
PY129:C. I. Pigment Yellow 129
PY139:C. I. Pigment Yellow 139
PY150:C. I. Pigment Yellow 150
PY185:C. I. Pigment Yellow 185
PY215:C. I. Pigment Yellow 215

<Preparation of Dispersions R1 to R15, Y1, and Comparative Dispersions RM1 and RM2>
The mixture in which each component shown in Table 4 was blended in the amount shown in Table 4 was further mixed and dispersed for 3 hours using a bead mill (zirconia beads 0.3 mm in diameter). Thereafter, a dispersion treatment was further performed using a high-pressure disperser NANO-3000-10 equipped with a pressure reducing mechanism (manufactured by Japan BEE Co., Ltd.) at a flow rate of 500 g/min under a pressure of 2,000 kg/ ^cm3 . This dispersion treatment was repeated 10 times to obtain each of the dispersions R1 to R15 (red dispersions), dispersion Y1 (yellow dispersion), and comparative dispersions RM1 and RM2 (red dispersions).

Details of the abbreviations listed in Table 4 other than those mentioned above are shown below.
PR254: C. I. Pigment Red 254
PR264:C. I. Pigment Red 264
PR272:C. I. Pigment Red 272
PR122:C. I. Pigment Red 122
PO71: C. I. Pigment Orange 71

<Preparation of Dispersions B1 to B5 and Comparative Dispersions BM1 and BM2>
A mixture in which each component shown in Table 5 was blended in the amount shown in Table 5 was further mixed and dispersed for 3 hours using a bead mill (zirconia beads 0.3 mm in diameter). Thereafter, a dispersion treatment was further performed using a high-pressure disperser equipped with a pressure reducing mechanism, NANO-3000-10 (manufactured by Japan BEE Co., Ltd.), at a pressure of 2,000 kg/ ^cm3 and a flow rate of 500 g/min. This dispersion treatment was repeated 10 times to obtain each of the dispersions B1 to B5 (blue dispersions) and the comparative dispersions BM1 to BM3 (blue dispersions).

The units of values in the component columns of Table 5 are parts by mass.
Details of the abbreviations listed in Table 5 other than those mentioned above are shown below.
PB15:6:C. I. Pigment Blue 15:6
PV23: C. I. Pigment Violet 23

(Examples G1 to G63 and Comparative Examples GM1 and GM2)
<Preparation of Coloring Composition>
The following materials were mixed to prepare a colored composition.
Dispersion liquid described in Table 6 or Table 7 below: 39.4 parts by mass Resin C1: 0.58 parts by mass Polymerizable compound E1: 0.54 parts by mass Photopolymerization initiator F3: 0.33 parts by mass Surfactant H1: 4.17 parts by mass p-Methoxyphenol: 0.0006 parts by mass Propylene glycol monomethyl ether acetate (PGMEA): 7.66 parts by mass The pigment content in the colored compositions of Examples G1 to G63 and Comparative Examples GM1 and GM2 was 62.6% by mass relative to the total solid content of the colored composition.

Resin C1: Resin shown below, Mw 10,000, the numbers added to the main chain are molar ratios, and the numbers in parentheses to the right of the ethyleneoxy units represent the average repeating number.

Polymerizable compound E1: KAYARAD DPHA (manufactured by Nippon Kayaku Co., Ltd.)
Photopolymerization initiator F3: a compound having the following structure.

Surfactant H1: 1% by mass PGMEA solution of the following mixture (Mw = 14,000). In the formula below, the percentages indicating the proportion of repeating units are mol%.

The following evaluations were carried out using the obtained coloring composition. The evaluation results are shown in Table 6 or Table 7.

<Liquid stability (dispersion stability)>
The initial viscosity (V0) of the colored composition (dispersion or curable composition) obtained above was measured using "RE-85L" manufactured by Toki Sangyo Co., Ltd. Next, this colored composition was left to stand at 45°C for 3 days, and the viscosity (V1) after standing was measured. The viscosity increase rate (%) of the colored composition after standing was calculated from the following formula, and the liquid stability was evaluated according to the following evaluation criteria. The smaller the viscosity increase rate (%), the better the liquid stability. The viscosity of the colored composition was measured in a state where the temperature was adjusted to 25°C.
Viscosity increase rate (%)=[(viscosity after standing (V1)−initial viscosity (V0))/initial viscosity (V0)]×100
A: 0≦viscosity increase rate≦3%
B: 3% < viscosity increase rate ≦ 5%
C: 5%<viscosity increase rate≦10%
D: 10% < viscosity increase rate ≦ 15%
E: 15% < viscosity increase rate

<Developability (suppression of development residue)>
CT-4000 (manufactured by Fujifilm Electronics Materials Co., Ltd.) was applied by spin coating on a silicon wafer so that the film thickness was 0.1 μm, and heated at 220 ° C. for 1 hour using a hot plate to form an undercoat layer. Each coloring composition was applied by spin coating on the silicon wafer with the undercoat layer, and then heated at 100 ° C. for 2 minutes using a hot plate to obtain a composition layer with a film thickness of 1 μm. This composition layer was exposed by irradiating light with a wavelength of 365 nm at an exposure amount of 200 mJ / cm ² using an i-line stepper FPA-3000i5 + (manufactured by Canon Inc.) through a mask pattern in which square pixels with a side of 1.1 μm were arranged in an area of 4 mm × 3 mm on the substrate. The composition layer after exposure was subjected to paddle development at 23 ° C. for 60 seconds using a 0.3 mass % aqueous solution of tetramethylammonium hydroxide. Thereafter, it was rinsed with water in a spin shower, and further washed with pure water. Thereafter, the water droplets were blown off with high-pressure air, the silicon wafer was naturally dried, and then post-baked at 200° C. for 300 seconds using a hot plate to form a pattern. The developability was evaluated by observing the presence or absence of residue between patterns.
The area outside the pattern formation area (unexposed area) was observed with a scanning electron microscope (SEM) (magnification 10,000 times), and residues with a diameter of 0.1 μm or more per 5 μm × 5 μm area (1 area) of the unexposed area were counted and evaluated according to the following evaluation criteria.
A: No residue left in any one area.
B: The number of residues per area is less than 10.
C: The number of residues per area is 10 or more and less than 20.
D: The number of residues per area is 20 or more and less than 30.
E: The number of residues per area is 30 or more.
F: Development was not possible at all.

<Adhesion>
CT-4000 (manufactured by FUJIFILM Electronics Materials Co., Ltd.) was applied by spin coating on a silicon wafer so that the film thickness was 0.1 μm, and heated at 220 ° C. for 1 hour using a hot plate to form an undercoat layer. Each coloring composition was applied by spin coating on the silicon wafer with the undercoat layer, and then heated at 100 ° C. for 2 minutes using a hot plate to obtain a composition layer with a film thickness of 0.5 μm. This composition layer was exposed by irradiating light with a wavelength of 365 nm at an exposure amount of 500 mJ / cm ² using an i-line stepper FPA-3000i5 + (manufactured by Canon Inc.) through a mask pattern in which square pixels with a side of 1.1 μm were arranged in an area of 4 mm × 3 mm on the substrate. The composition layer after exposure was subjected to paddle development at 23 ° C. for 60 seconds using a 0.3 mass % aqueous solution of tetramethylammonium hydroxide. Thereafter, it was rinsed with water in a spin shower, and further washed with pure water. Thereafter, the water droplets were blown off with high-pressure air, the silicon wafer was naturally dried, and then post-baked for 300 seconds at 220° C. using a hot plate to form a pattern. The resulting pattern was observed using an optical microscope, and the number of patterns that were in close contact was counted to evaluate the adhesion.
A: All patterns are in close contact.
B: The percentage of patterns that are in close contact is 95% or more but less than 100% of the total patterns.
C: The percentage of patterns that are in close contact with each other is 90% or more and less than 95% of all patterns.
D: The percentage of patterns that are in close contact with each other is 85% or more and less than 90% of all patterns.
E: Less than 85% of the patterns are in close contact with each other.

(Examples G64 to G79)
A colored composition was prepared and the above evaluation was performed in the same manner as in Example G1, except that the dispersion liquid was changed to one shown in Table 8. The evaluation results are shown in Table 8.
The pigment content in each of the coloring compositions of Examples G64 to G79 was 63 mass % relative to the total solid content of the coloring composition.

(Examples G80 to G97)
A colored composition was prepared in the same manner as in Example G1, except that the types and amounts of the dispersion liquid, resin, polymerizable compound, photopolymerization initiator and solvent were changed to those shown in Table 9, and the above evaluations were performed.
The pigment content in each of the coloring compositions of Examples G80 to G97 was 62.6% by mass relative to the total solid content of the coloring composition.
The performance evaluation results were equivalent to those of Example G9.

Details of the abbreviations listed in Table 9 other than those mentioned above are shown below.
Resin C-1: PGMEA solution (solid content 30%) of the following resin
Resin C-2: PGMEA solution (solid content 30%) of the following resin

E2: Compound with the following structure

E3: Compound with the following structure

E4: Compound of the following structure

E5: Aronix TO-2349 (manufactured by Toagosei Co., Ltd.)
F1: IRGACURE-OXE01 (manufactured by BASF), a compound having the following structure.
F2: IRGACURE-OXE02 (manufactured by BASF), a compound having the following structure.
F4: IRGACURE 369 (manufactured by BASF), a compound having the following structure.
F5: A compound having the following structure:

(Examples G98 to G111)
A colored composition (curable composition) was prepared in the same manner as in Example G1, except that the types and amounts of the dispersion, resin, polymerizable compound, photopolymerization initiator, and solvent were changed to those shown in Table 10, and the above-mentioned evaluations were performed. The evaluation results are shown in Table 10.

In addition, "pigment concentration" in Table 10 represents the pigment content relative to the total solids content of the coloring composition.

(Examples R1 to R15, Example Y1, and Comparative Examples RM1 and RM2)
Colored compositions were prepared and the above evaluations were carried out in the same manner as in Example G1, except that the dispersion liquid was changed to one shown in Table 11. The evaluation results are shown in Table 11.
The pigment content in each of the coloring compositions of Examples R1 to R15, Example Y1, and Comparative Examples RM1 and RM2 was 63% by mass relative to the total solid content of the coloring composition.

(Examples B1 to B5, and Comparative Examples BM1 and BM2)
Colored compositions were prepared and the above evaluations were carried out in the same manner as in Example G1, except that the dispersion liquid was changed to one shown in Table 12. The evaluation results are shown in Table 12.
The pigment content in each of the coloring compositions of Examples B1 to B5 and Comparative Examples BM1 and BM2 was 63 mass % relative to the total solid content of the coloring composition.

As shown in Tables 6 to 12, the colored compositions of the Examples were superior in liquid stability to the colored compositions of the Comparative Examples.
Furthermore, as shown in Tables 6 to 12 above, the colored compositions of the Examples were also excellent in adhesion to the resulting cured products and in suppressing development residues.

(Example 201: Fabrication of solid-state imaging device)
On a silicon wafer, the colored composition of Example G33 was applied by spin coating so that the film thickness after film formation was 0.4 μm. Then, using a hot plate, it was heated at 100 ° C. for 2 minutes. Then, using an i-line stepper exposure device FPA-3000i5 + (manufactured by Canon Inc.), it was exposed through a mask of a 1.0 μm square dot pattern at 1,000 mJ / cm ^2. Then, using a 0.3 mass% aqueous solution of tetramethylammonium hydroxide (TMAH), paddle development was performed at 23 ° C. for 60 seconds. Thereafter, it was rinsed with a spin shower and further washed with pure water. Then, using a hot plate, it was heated at 200 ° C. for 5 minutes to form a pattern on the silicon wafer by curing the colored composition of Example G33. Similarly, the colored composition of Example R1 and the colored composition of Example B1 were patterned sequentially to form red, green and blue colored patterns (Bayer patterns).
The Bayer pattern is a repeated 2×2 array of color filter elements having one red element, two green elements, and one blue element, as disclosed in U.S. Pat. No. 3,971,065.
The obtained color filter was incorporated into a solid-state imaging device according to a known method. It was confirmed that the solid-state imaging device had excellent adhesion in the cured film and favorable image recognition ability, regardless of which colored composition prepared in the Examples was used.

The disclosure of Japanese Patent Application No. 2020-128455, filed on July 29, 2020, is incorporated herein by reference in its entirety.
All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

Claims (13)

Pigments,
A resin represented by the following formula (1), and
A coloring composition comprising:

In formula (1), R ¹ each independently represents a divalent linking group, R ² each independently represents a hydrogen atom or a monovalent substituent, L ¹ represents a (n+1)-valent linking group having a sulfur atom at the end on the P ¹ side, L ¹ has 2 to 10 carbon atoms, n represents an integer of 1 to 10, m represents an integer of 2 to 30, P ¹ represents a polymer chain obtained by polymerizing an ethylenically unsaturated compound and having an acid group and a structure represented by the following formula (2) , and the number of monomer units derived from the ethylenically unsaturated compound contained in P ¹ is 2 to 20.

In formula (2), R3 ^represents a hydrogen atom or an alkyl group, X1 ^represents a monovalent substituent, and L represents an integer of 2 to 6. The colored composition according to claim 1 , wherein the resin is a resin represented by the following formula (3):

In formula (3), R ¹ 's each independently represent a divalent linking group, R ² 's each independently represent a hydrogen atom or a monovalent substituent, L ² represents a (n+1)-valent linking group, L ² has 2 to 10 carbon atoms, n represents an integer of 1 to 10, m represents an integer of 2 to 30, and P ² represents a polymer chain having an acid group and a structure represented by formula (2). The coloring composition according to claim 1 or 2, wherein R ¹ is an alkylene group having 3 to 6 carbon atoms, R ² is a hydrogen atom or an alkyl group, n is 1, and m is an integer of 4 to 20. The coloring composition according to claim 1, wherein the ethylenically unsaturated compound forming the ^P1 includes a compound having an acid group and having a minimum number of atoms connecting the ethylenically unsaturated group and the acid group of 6 to 20 . The colored composition according to any one of claims 1 to 4 , wherein the resin has a weight average molecular weight of 3,000 to 15,000. The coloring composition according to claim 1 , wherein the number of monomer units derived from the ethylenically unsaturated compound in the ^P1 is 2 to 10. The colored composition according to any one of claims 1 to 5 , further comprising a polymerizable compound. A cured product obtained by drying or curing the colored composition according to any one of claims 1 to 7 . A color filter comprising the cured product according to claim 8 . A solid-state imaging device comprising the color filter according to claim 9 . An image display device comprising the color filter according to claim 9 . A resin represented by the following formula (3):

In formula (3), R ¹ 's each independently represent a divalent linking group, R ² 's each independently represent a hydrogen atom or a monovalent substituent, L ² represents a (n+1)-valent linking group, L ² has 2 to 10 carbon atoms, n represents an integer of 1 to 10, m represents an integer of 2 to 30, and P ² represents a polymer chain having an acid group and a structure represented by the following formula (2):

In formula (2), ^R3 represents a hydrogen atom or an alkyl group, ^X1 represents a monovalent substituent, and L represents an integer of 2 to 6 . The method for producing the resin according to claim 12 , comprising the following steps (i-1) and (i-2), or the following steps (ii-1) and (ii-2):
Step (i-1): A step of polymerizing an ethylenically unsaturated compound in the presence of a mercapto compound having a hydroxy group to prepare a resin having a hydroxy group at its terminal. Step (i-2): A step of forming a polyester resin chain at the hydroxy group of the resin having a hydroxy group at its terminal. Step (ii-1): A step of forming a polyester resin chain at the hydroxy group of a mercapto compound having a hydroxy group to prepare a polyester resin having a mercapto group. Step (ii-2): A step of polymerizing an ethylenically unsaturated compound in the presence of the polyester resin having a mercapto group.