TWI752137B - Liquid crystal composition and liquid crystal display element - Google Patents

Abstract

Although the compound represented by the following general formula (i) has excellent properties, it has many problems in practical use as a liquid crystal composition.

That is, a liquid crystal composition that contains the compound represented by the general formula (i) to a certain extent, is excellent in various properties such as dielectric anisotropy and refractive index anisotropy, and can be stored at a low temperature cannot be obtained yet. It is a liquid crystal composition with high reliability required for performance or liquid crystal display device applications.

The present invention relates to a liquid crystal composition comprising a compound represented by general formula (i), a compound represented by general formula (ii), a compound represented by general formula (iii), and a compound represented by general formula (Ni) The compound or the compound represented by the general formula (N-ii), the content of the compound represented by the general formula (ii) is 1% by weight or more and 24% by weight or less, and the content of the compound represented by the general formula (iii) is more than 0 % by weight and 15% by weight or less.

Description

Liquid crystal composition and liquid crystal display element

The present invention relates to liquid crystal compositions.

Liquid crystal display elements using a liquid crystal composition exhibiting negative dielectric anisotropy are widely used in liquid crystal displays and the like. As the performance of liquid crystal displays has been improved in recent years and applications have been expanded, liquid crystal compositions used in such applications are required to have higher various properties.

Among them, a liquid crystal composition excellent in negative dielectric anisotropy is urgently required. However, there is a situation in which "there are limited practical liquid crystal compounds that exhibit negative dielectric anisotropy and do not impair other various properties of the liquid crystal composition", and it is not easy to satisfy this requirement.

In response to the above-mentioned demands, attempts are being made to apply novel compounds exhibiting negative dielectric anisotropy to liquid crystal compositions. For example, in recent years, a composition containing a compound represented by the following general formula (i) has been studied (Patent Documents 1 to 3).

Due to its excellent dielectric anisotropy, refractive index anisotropy, and the like, this compound is expected to impart further improvement in properties than liquid crystal compositions exhibiting negative dielectric anisotropy.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2015-131956

[Patent Document 2] WO2015/139827A1

[Patent Document 3] DE102015003411A

Although the compound represented by the general formula (i) has excellent properties, there are many problems in practical use as a liquid crystal composition.

That is, a liquid crystal composition that contains the compound represented by the general formula (i) to a certain extent, is excellent in various properties such as dielectric anisotropy and refractive index anisotropy, and can be stored at a low temperature cannot be obtained yet. It is a liquid crystal composition with high reliability required for performance or liquid crystal display device applications.

The inventors of the present application, as a result of earnestly studying the properties of a liquid crystal composition containing a compound represented by the general formula (i), found that a liquid crystal composition having a certain specific composition exhibits practically excellent properties, thereby completing the present invention . That is, the present invention is a liquid crystal composition comprising a compound represented by the general formula (i), a compound represented by the general formula (ii), a compound represented by the general formula (iii), and a compound represented by the general formula (Ni) The compound represented by the general formula (N-ii) or the compound represented by the general formula (N-ii), the content of the compound represented by the general formula (ii) is 1% by weight or more and 24% by weight or less, and the content of the compound represented by the general formula (iii) is More than 0% by weight and less than 15% by weight,

(in the formula, R ⁱ¹ and R ⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted)

(In the formula, R ⁱⁱ¹ and R ⁱⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms)

(In the formula, R ⁱⁱⁱ¹ represents an alkenyl group with 2 to 8 carbon atoms, and R ⁱⁱⁱ² represents an alkyl group with 1 to 8 carbon atoms or an alkenyl group with 2 to 8 carbon atoms)

(In the formula, R ^Ni1 and R ^Ni2 each independently represent an alkyl group with 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted)

(In the formula, R ^Nii1 and R ^Nii2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted, n ^Nii1 represents 1 or 2).

The liquid crystal composition of the present invention can have both high dielectric anisotropy and other various properties at a high level. By using the liquid crystal composition of the present invention, a liquid crystal display element for active matrix driving excellent in characteristics can be obtained.

[The compound represented by the general formula (i)]

In the general formula (i), R ⁱ¹ and R ⁱ² preferably each independently represent one or two or more non-adjacent -CH ₂ -, and can also be independently represented by -O-, -COO- or -OCO. -The substituted alkyl group having 1 to 8 carbon atoms, preferably an alkyl group or alkoxy group having 1 to 8 carbon atoms. In order to exhibit particularly excellent dielectric anisotropy, an alkoxy group is preferred.

The alkyl group is preferably a methyl group, an ethyl group, an n-propyl group, an n-butyl group, and an n-pentyl group. As the alkoxy group, a methoxy group, an ethoxy group, an n-propoxy group, an n-butoxy group, or an n-pentoxy group is preferable.

Specifically, the compound represented by the general formula (i) is preferably a compound selected from the group of compounds represented by the formula (i-1) to the formula (i-9), preferably selected from the formula (i-1) ) to the compound in the compound group represented by the formula (i-5), preferably the compound of the formula (i-3).

Regarding the compounds represented by formula (i-1) to formula (i-9), from the viewpoint of improving the low-temperature storage property of the liquid crystal composition, it is preferable to use two or more kinds together.

[The compound represented by the general formula (ii)]

In the general formula (ii), R ⁱⁱ¹ and R ^{ii2 are} preferably each independently an alkyl group having 2 to 5 carbon atoms.

Further, the compound represented by the general formula (ii) is preferably a compound selected from the compound group represented by the formula (ii.1) to the formula (ii.4), preferably the formula (ii.1), the formula ( ii.3) or the compound represented by formula (ii.4). The compound represented by the formula (ii.1) is particularly preferable because it can improve the response speed of the composition. Moreover, when higher Tni is required rather than a response speed, it is preferable to use the compound represented by a formula (ii.3) and a formula (ii.4).

Regarding the compounds represented by formula (ii.1) to (ii.4), it is preferable to use two or more kinds together from the viewpoint of improving the low-temperature storage property of the liquid crystal composition.

[The compound represented by the general formula (iii)]

In the general formula (iii), R ^{iii1 is} preferably an alkenyl group having 2 to 5 carbon atoms, more preferably an alkenyl group having 2 or 3 carbon atoms.

Moreover, R ^{iii2 is more} preferably an alkyl group or an alkenyl group having 2 to 5 carbon atoms, more preferably an alkyl group or an alkenyl group having 2 or 3 carbon atoms. The compound represented by general formula (iii) Specifically, the compound represented by general formula (iii) is preferably a compound selected from the group of compounds represented by formula (iii.1) to (iii.3). In addition, when it is desired to improve the afterimage, drip marks, and volatility, it is preferable to use the compounds represented by the formula (iii.2) and the formula (iii.3).

It is preferable to use 2 or more types together from a viewpoint of improving the low temperature storage property of a liquid crystal composition about the compound represented by a formula (iii.1) - a formula (iii.3).

When two or more compounds represented by formula (iii.1) to formula (iii.3) are combined to constitute a liquid crystal composition, the usage amount may be adjusted, for example, from the following viewpoints. When the emphasis is placed on improving the response speed of the liquid crystal composition, it is preferable to mainly use the compound represented by the formula (iii.1) and use a small amount of the compound represented by the formula (iii.2) or the formula (iii.3) compound. When the emphasis is placed on suppressing the volatilization of the components of the liquid crystal composition, it is preferable to mainly use the compound represented by the formula (iii.2) or the formula (iii.3).

[The compound represented by the general formula (N-i)]

In the general formula (Ni), R ^Ni1 and R ^Ni2 preferably each independently represent one or two or more non-adjacent -CH ₂ -, and can also be independently represented by -O-, -COO- or -OCO. -Substituted alkyl group with 1 to 8 carbon atoms, more preferably an alkyl group with 1 to 8 carbon atoms or an alkoxy group, still more preferably an alkyl group with 1 to 5 carbon atoms or an alkoxy group, especially preferred represents an alkyl group or an alkoxy group having 1 to 3 carbon atoms.

Specifically, the compound represented by general formula (Ni) is preferably formula (Ni.1) to formula (Ni.7), formula (Ni.10), formula (Ni.11), formula (Ni.20) or The compound represented by the formula (Ni.21) is preferably the compound represented by the formula (Ni.1)~(Ni.7) or the formula (Ni.21), preferably the formula (Ni.1), the formula ( A compound represented by Ni.2), formula (Ni.3), formula (Ni.4) or formula (Ni.6).

Regarding the compounds represented by formula (Ni.1) to formula (Ni.7), formula (Ni.10), formula (Ni.11), formula (Ni.20) or formula (Ni.21), the liquid crystal is improved. From the viewpoint of the low-temperature storage properties of the composition, it is preferable to use two or more kinds together.

[The compound represented by the general formula (N-ii)]

In the general formula (N-ii), R ^Nii1 and R ^Nii2 preferably each independently represent one or two or more -CH ₂ - which are not adjacent to each other, and may also be independently represented by -O-, -COO- or The -OCO- substituted alkyl group having 1 to 8 carbon atoms is more preferably an alkyl group or an alkoxy group having 1 to 8 carbon atoms, and even more preferably an alkyl group or an alkoxy group having 2 to 5 carbon atoms.

Moreover, from the viewpoint of improving the response speed, n ^{Nii1 is} preferably 1, and from the viewpoint of improving the Tni of the liquid crystal composition, n ^{Nii1 is} preferably 2.

Specifically, the compound represented by the general formula (N-ii) is preferably the formula (N-ii.1-1) to the formula (N-ii.1-5) or the formula (N-ii.2-1) to A compound represented by formula (N-ii.2-5).

Regarding the compounds represented by formula (N-ii.1-1) ~ formula (N-ii.1-5) or formula (N-ii.2-1) ~ formula (N-ii.2-5), the From the viewpoint of improving the low-temperature storage properties of the liquid crystal composition, it is preferable to use two or more types together.

[The compound represented by the general formula (N-iii)]

Further, the liquid crystal composition of the present invention preferably contains a compound represented by the general formula (N-iii).

(In the formula, R ^Niii1 and R ^Niii2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted).

In the general formula (N-iii), R ^Niii1 and R ^Niii2 preferably each independently represent one or two or more non-adjacent -CH ₂ -, and may be independently represented by -O-, -COO- or The -OCO- substituted alkyl group having 1 to 8 carbon atoms is more preferably an alkyl group or an alkoxy group having 1 to 8 carbon atoms, and even more preferably an alkyl group or an alkoxy group having 2 to 5 carbon atoms.

[Content of each compound]

In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (ii) is 1% by weight or more and 24% by weight or less, and the content of the compound represented by the general formula (iii) is more than 0% by weight and 15% by weight %the following.

When the content of the compound represented by the general formula (ii) exceeds 24% by weight, it becomes difficult to maintain the low-temperature storage properties of the liquid crystal composition. From the viewpoint of reducing the viscosity of the liquid crystal composition, the content of the compound represented by the general formula (ii) is preferably 5% by weight or more, more preferably 10% by weight or more, still more preferably 15% by weight or more; From the viewpoint of low temperature storage properties, it is preferably 22% by weight or less, more preferably 20% by weight or less.

When the content of the compound represented by the general formula (iii) exceeds 15 wt %, the reliability of the liquid crystal composition is lowered, and problems such as image sticking tend to occur when used in a display element. From the viewpoint of reducing the viscosity of the liquid crystal composition, the content of the compound represented by the general formula (iii) is preferably 1% by weight or more, more preferably 3% by weight or more, still more preferably 5% by weight or more, particularly preferably It is 7% by weight or more; from the viewpoint of improving the reliability of the liquid crystal composition, it is preferably 14% by weight or less, more preferably 12% by weight or less, and still more preferably 10% by weight or less.

The content of the compound represented by the general formula (i), the compound represented by the general formula (Ni), and the compound represented by the general formula (N-ii) in the liquid crystal composition of the present invention is not particularly limited, and can be mixed as desired The characteristics of the liquid crystal composition can be adjusted appropriately. Among them, from the viewpoint of constituting "a liquid crystal composition having excellent various properties including dielectric anisotropy", it is preferable to adjust to the following range.

From the viewpoint of improving the dielectric anisotropy and refractive index anisotropy of the liquid crystal composition, the content of the compound represented by the general formula (i) is preferably 1% by weight or more, more preferably 2% by weight or more, and More preferably, it is 3% by weight or more, particularly preferably 4% by weight or more; from the viewpoint of maintaining low-temperature storage properties, it is preferably 15% by weight or less, more preferably 12% by weight or less, and still more preferably 9% by weight or less , particularly preferably 6 wt % or less.

From the viewpoint of improving the dielectric anisotropy of the liquid crystal composition, the total content of the compounds represented by the general formula (Ni) and the general formula (N-ii) is preferably 10% by weight or more, more preferably 15% by weight above, more preferably 20% by weight or more, still more preferably 25% by weight or more, particularly preferably 30% by weight or more; More preferably, it is 50% by weight or less, and even more preferably 40% by weight or less.

From the viewpoint of improving the refractive index anisotropy of the liquid crystal composition, the content of the compound represented by the general formula (Ni) is preferably more than 0 wt %, more preferably 1 wt % or more, still more preferably 2 wt % above, more preferably 2.2 wt % or more, particularly preferably 2.4 wt % or more; from the viewpoint of the low-temperature storage property of the liquid crystal composition, preferably 30 wt % or less, more preferably 25 wt % or less, and still more It is preferably 20% by weight or less, more preferably 15% by weight or less, and particularly preferably 10% by weight or less.

From the viewpoint of improving the dielectric anisotropy of the liquid crystal composition, the content of the compound represented by the general formula (N-ii) is preferably more than 0 wt %, more preferably 2 wt % or more, still more preferably 4 wt % or more % by weight or more, particularly preferably 6% by weight or more; from the viewpoint of the low-temperature storage property of the liquid crystal composition, preferably 30% by weight or less, more preferably 20% by weight or less, still more preferably 15% by weight or less, It is especially preferable that it is 10 weight% or less.

From the viewpoint of improving the dielectric anisotropy and refractive index anisotropy of the liquid crystal composition, the content of the compound represented by the general formula (N-iii) is preferably more than 0 wt %, more preferably 2 wt % or more , more preferably 5 wt % or more, still more preferably 10 wt % or more, still more preferably 15 wt % or more, particularly preferably 20 wt % or more; It is preferably 60% by weight or less, more preferably 50% by weight or less, and still more preferably 40% by weight or less.

Regarding the total content of the compounds represented by the general formulae (i), (ii), (iii), (Ni) and (N-ii) in the liquid crystal composition of the present invention, it becomes easy to ensure various excellent properties. From the viewpoint of practicality, it is preferably 10% by weight or more, more preferably 20% by weight or more, still more preferably 30% by weight or more, more preferably 90% by weight or less, more preferably 80% by weight or less, and More preferably, it is 70% by weight or less.

In addition, regarding the total content of the compounds represented by the general formulae (i), (ii), (iii), (Ni), (N-ii) and (N-iii), it becomes easy to ensure various excellent properties. From the viewpoint of practicality, it is preferably 30% by weight or more, more preferably 40% by weight or more, still more preferably 45% by weight or more, preferably 95% by weight or less, more preferably 85% by weight or less, and More preferably, it is 75% by weight or less.

[Liquid crystal composition]

Since the liquid crystal composition of the present invention has the above-mentioned compositional characteristics, various characteristics can be well maintained, and high dielectric anisotropy can be realized.

The dielectric anisotropy can be appropriately adjusted according to the design of the desired liquid crystal display device. When considering the driving voltage of the liquid crystal display element, the value of the dielectric anisotropy is preferably, for example, -2.6 or less, more preferably -2.7 or less, and still more preferably -2.8 or less.

The adjustment of the dielectric anisotropy can mainly be achieved by adjusting the ratio of the compound represented by the general formula (i), the compound represented by the general formula (N-i), or the compound represented by the general formula (N-ii). In addition, a known compound having negative dielectric anisotropy, which will be described later, may be added and adjusted as necessary.

Furthermore, the liquid crystal composition of the present invention can also be excellent in properties such as refractive index anisotropy and γ1 by appropriately adjusting the content of each compound.

For example, the value of the refractive index anisotropy is preferably 0.090 or more, more preferably 0.095 or more, still more preferably 0.100 or more, still more preferably 0.105 or more, and particularly preferably 0.105 or more. 0.107 or more. The adjustment of the refractive index anisotropy can mainly be achieved by adjusting the content of the compound represented by the general formula (i) or the compound represented by the general formula (N-i).

For example, the value of γ1 is preferably 120 mPa·s or less, and more preferably 115 mPa·s or less. The adjustment of γ1 can mainly be performed by adjusting the content of the compound represented by the general formula (i), the compound represented by the general formula (ii), or the compound represented by the general formula (iii).

The liquid crystal composition of the present invention may contain known compounds used in conventional liquid crystal compositions. As such a compound, the following are mentioned. In addition, when describing only a composition below, it is assumed that it means the liquid crystal composition of this invention.

The composition of the present invention preferably contains one or more compounds selected from the compounds represented by the general formulae (N-1), (N-2) and (N-3). Among them, these compounds are selected from compounds different from the compounds represented by the general formulae (N-i) and (N-ii) actually contained in the composition. These compounds correspond to compounds with a negative dielectric (the sign of Δε is negative and its absolute value is greater than 2).

(In the formula, R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent alkyl groups -CH ₂ - can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-, A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 and A ^N32 independently represent the freedom of selection

(a) 1,4- cyclohexylene (in the presence of a group -CH ₂ - or two or more of the adjacent -CH ₂ - may be substituted with -O-) and

(b) 1,4-phenylene group (one -CH= present in the group or two or more non-adjacent -CH= may be substituted with -N=)

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (existing in naphthalene-2,6-diyl Diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, one -CH= or two or more non-adjacent -CH= may be substituted with -N=)

(d) 1,4-Cyclohexenyl

The groups in the formed group, the above group (a), group (b), group (c) and group (d) may be independently substituted by cyano group, fluorine atom or chlorine atom, Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO- , -OCF ₂ -, - CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-, X ^N21 represents hydrogen atom or fluorine atom, T ^N31 represents -CH ₂ - or oxygen atom, n ^N11 , n ^N12 , n ^N21 , n ^N22 , n ^N31 and n ^N32 independently represent an integer of 0 to 3, n ^N11 +n ^N12 , n ^N21 +n ^N22 and n ^N31 + n ^{N32 is} independently 1, 2 or 3, when there are multiple A ^N11 ~A ^N32 and Z ^N11 ~Z ^N32 , these may be the same or different)

The compounds represented by the general formulae (N-1), (N-2) and (N-3) are preferably compounds whose Δε is negative and whose absolute value is greater than 3.

In the general formulae (N-1), (N-2) and (N-3), R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^{N32 are} preferably each independently having 1 to 1 carbon atoms. 8 alkyl groups, alkoxy groups with 1 to 8 carbon atoms, alkenyl groups with 2 to 8 carbon atoms, or alkenyloxy groups with 2 to 8 carbon atoms, preferably alkyl groups with 1 to 5 carbon atoms, An alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms or an alkyl group having 2 to 5 carbon atoms. The alkenyl group of 5 is more preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group of 2 to 3 carbon atoms, and particularly preferably an alkenyl group (propenyl group) having 3 carbon atoms.

烷等飽和之環結構之情形時，較佳為直鏈狀之碳原子數1~5之烷基、直鏈狀之碳原子數1~4之烷氧基及直鏈狀之碳原子數2~5之烯基。為了使向列相穩定化，碳原子及於存在之情形時之氧原子之合計較佳為5以下，且較佳為直鏈狀。 Furthermore, when the ring structure to which it is bonded is a phenyl group (aromatic), it is preferably a straight-chain alkyl group having 1 to 5 carbon atoms, or a straight-chain alkane having 1 to 4 carbon atoms. Oxygen and alkenyl with 4 to 5 carbon atoms, and the ring structure to which they are bonded is cyclohexane, pyran and bis

In the case of a saturated ring structure such as an alkane, a straight-chain alkyl group having 1 to 5 carbon atoms, a straight-chain alkoxy group having 1 to 4 carbon atoms, and a straight-chain carbon number 2 are preferred. Alkenyl of ~5. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and it is preferably linear.

As an alkenyl group, the group represented by any one selected from formula (R1) to formula (R5) is preferable. (The black dots in the formulas represent the carbon atoms in the ring structure)

When it is required to increase Δn independently, A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 and A ^{N32 are} preferably aromatic, in order to improve the response speed, preferably aliphatic, and For trans-1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-diphenylene Fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 1,4-cyclohexenyl, 1,4-bicyclo[2.2.2]octylene, piperylene pyridine-1,4-diyl, naphthalene-2,6-diyl, decalin-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably to represent the following structure,

More preferably, it represents trans-1,4-cyclohexylene, 1,4-cyclohexenylene, or 1,4-phenylene.

Preferably, Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 each independently represent -CH ₂ O-, -CF ₂ O-, -CH ₂ CH ₂ -, -CF ₂ CF ₂ - or Single bond, more preferably -CH ₂ O-, -CH ₂ CH ₂ - or single bond, particularly _{preferably -CH 2} O- or single bond.

X ^{N21 is} preferably a fluorine atom.

T ^{N31 is} preferably an oxygen atom.

n ^N11 +n ^N12 , n ^N21 +n ^N22 and n ^N31 +n ^{N32 are} preferably 1 or 2, preferably n ^N11 is 1 and n ^N12 is 0, n ^N11 is 2 and n ^N12 is 0 , n ^N11 is 1 and n ^N12 is 1 combination, n ^N11 is 2 and n ^N12 is 1 combination, n ^N21 is 1 and n ^N22 is 0 combination, n ^N21 is 2 and n ^N22 is 0 combination, n ^{A combination where N31} is 1 and n ^N32 is 0, and a combination where n ^N31 is 2 and n ^N32 is 0.

The preferred content ranges described below in relation to the compounds represented by the general formulae (N-1), (N-2) and (N-3) are defined as: including the general formula ( Compounds represented by Ni) and (N-ii). The lower limit of the preferable content of the compound represented by the formula (N-1) relative to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The preferred upper limit of the content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

The lower limit of the preferable content of the compound represented by formula (N-2) relative to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The preferred upper limit of the content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

The lower limit of the preferable content of the compound represented by the formula (N-3) relative to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The preferred upper limit of the content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

In the case where the viscosity of the composition of the present invention needs to be kept low and the response speed of the composition is fast, it is preferable that the lower limit value is lower and the upper limit value is lower. Furthermore, when the composition of the present invention is required to _{maintain a high T NI} and a composition having good temperature stability, it is preferable that the lower limit value is lower and the upper limit value is lower. In addition, when the dielectric anisotropy is to be increased in order to keep the driving voltage low, it is preferable that the lower limit value is higher and the upper limit value is higher.

As a compound represented by general formula (N-1), the compound group represented by following general formula (N-1a) - (N-1g) is mentioned.

(wherein, R ^N11 and R ^N12 have the same meanings as ^{R N11} and R ^N12 in the general formula (N-1) ^{, n Na11} represents 0 or 1, n ^Nb11 represents 0 or 1, n ^Nc11 represents 0 or 1, n ^Nd11 represents 0 or 1, n ^Ne11 represents 1 or 2, n ^Nf11 represents 1 or 2, n ^Ng11 represents 1 or 2, A ^Ne11 represents trans-1,4-cyclohexylene or 1,4-phenylene, A ^Ng11 represents trans-1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene, but at least one of them represents 1,4-cyclohexenyl, Z ^Ne11 represents single bond or ethylene, but at least one represents ethylene)

More specifically, the compound represented by the general formula (N-1) is preferably a compound selected from the group of compounds represented by the general formulae (N-1-1) to (N-1-21).

The compound represented by the general formula (N-1-1) is the following compound.

(In the formula, R ^N111 and R ^N112 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N))

R ^{N111 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a propyl group, a pentyl group or a vinyl group. R ^{N112 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group or a butoxy group.

The compound represented by general formula (N-1-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The kind of compound to be used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more as one embodiment of the present invention.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be smaller, the effect is higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-1) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20%, 23% %, 25%, 27%, 30%, 33%, 35%. Regarding the preferable upper limit of the content, relative to the total amount of the composition of the present invention, it is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

Furthermore, the compound represented by the general formula (N-1-1) is preferably a compound selected from the group of compounds represented by the formula (N-1-1.1) to the formula (N-1-1.23), preferably the formula The compounds represented by (N-1-1.1) to (N-1-1.4) are preferably compounds represented by formula (N-1-1.1) and formula (N-1-1.3).

The compounds represented by the formulae (N-1-1.1)~(N-1-1.22) can be used alone or in combination, and the compounds represented by the formulas (N-1-1.1)~(N-1-1.22) can be used alone or in combination. The lower limit of the content is 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. Regarding the preferable upper limit of the content, relative to the total amount of the composition of the present invention, it is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by the general formula (N-1-2) is the following compound.

(In the formula, R ^N121 and R ^N122 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N))

R ^{N121 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group, a butyl group or a pentyl group. R ^{N122 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, preferably methyl, propyl, methoxy, ethyl oxy or propoxy.

The compound represented by the general formula (N-1-2) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The kind of compound to be used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more as one embodiment of the present invention.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set less, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-2) relative to the total amount of the composition of the present invention is 5%, 7%, 10%, 13%, 15%, 17%, 20% %, 23%, 25%, 27%, 30%, 33%, 35%, 37%, 40%, 42%. The preferable upper limit of the content is 50%, 48%, 45%, 43%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%.

Furthermore, the compound represented by the general formula (N-1-2) is preferably a compound selected from the group of compounds represented by the formula (N-1-2.1) to the formula (N-1-2.22), preferably the formula (N-1-2.3) to formula (N-1-2.7), formula (N-1-2.10), formula (N-1-2.11), formula (N-1-2.13) and formula (N-1- 2.20) The compounds represented by the formula (N-1-2.3) to (N-1-2.7) are preferred when the improvement of Δε is emphasized, and the improvement of _{T NI is emphasized.} , the compounds represented by the formula (N-1-2.10), the formula (N-1-2.11) and the formula (N-1-2.13) are preferred, and when the improvement of the response speed is emphasized, the formula The compound represented by (N-1-2.20).

The compounds represented by formula (N-1-2.1) to formula (N-1-2.22) can be used alone or in combination, with respect to the total amount of the composition of the present invention alone or compared with the compounds. The lower limit of the optimal content is 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. Regarding the preferable upper limit of the content, relative to the total amount of the composition of the present invention, it is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by the general formula (N-1-4) is the following compound.

(In the formula, R ^N141 and R ^N142 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^N141 and R ^{N142 are} preferably independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably methyl, propyl group, ethoxy or butoxy.

The compound represented by the general formula (N-1-4) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be smaller, the effect is higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-4) relative to the total amount of the composition of the present invention is 3%, 5%, 7%, 10%, 13%, 15%, 17% %, 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10%, 8%.

Furthermore, the compound represented by the general formula (N-1-4) is preferably a compound selected from the group of compounds represented by the formula (N-1-4.1) to the formula (N-1-4.14), and is preferably the formula The compounds represented by (N-1-4.1) to (N-1-4.4) are preferably represented by formula (N-1-4.1), formula (N-1-4.2) and formula (N-1-4.4) represented compound.

The compounds represented by the formulas (N-1-4.1) to (N-1-4.14) can be used alone or in combination, with respect to the total amount of the composition of the present invention alone or the better of these compounds. The lower limit of the content is 3%, 5%, 7%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10%, 8%.

The compound represented by the general formula (N-1-5) is the following compound.

(In the formula, R ^N151 and R ^N152 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^N151 and R ^{N152 are} preferably independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably ethyl, propyl base or butyl.

The compound represented by the general formula (N-1-5) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set less, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-5) relative to the total amount of the composition of the present invention is 5%, 8%, 10%, 13%, 15%, 17%, 20% %. The preferable upper limit of the content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Further, the compound represented by the general formula (N-1-5) is preferably a compound selected from the group of compounds represented by the formula (N-1-5.1) to the formula (N-1-5.6), preferably the formula (N-1-5.1), a compound represented by formula (N-1-5.2) and formula (N-1-5.4).

The compounds represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) can be used alone or in combination, relative to the total composition of the present invention. The lower limit of the amount alone or the preferable content of these compounds is 5%, 8%, 10%, 13%, 15%, 17%, 20%. The preferable upper limit of the content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-10) are the following compounds. However, the compound represented by the general formula (N-1-10) is selected from a compound different from the compound represented by the general formula (N-ii) actually contained in the composition.

(In the formula, R ^N1101 and R ^N1102 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1101 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl, butyl, vinyl or 1-propenyl. R ^{N1102 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-10) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The preferable content range in relation to the compound represented by the general formula (N-1-10) described below is defined as including the compound represented by the general formula (N-ii) actually contained in the composition. The lower limit of the preferable content of the compound represented by the formula (N-1-10) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (N-1-10) is preferably a compound selected from the group of compounds represented by the formula (N-1-10.1) to the formula (N-1-10.21), preferably the formula Compounds represented by (N-1-10.1) to (N-1-10.5), formula (N-1-10.20), and formula (N-1-10.21), preferably formula (N-1-10.1) , a compound represented by formula (N-1-10.2), formula (N-1-10.20), and formula (N-1-10.21).

The compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.20), and formula (N-1-10.21) can be used alone or in combination , relative to the total amount of the composition of the present invention alone or the lower limit of the preferred content of these compounds is 5%, 10%, 13%, 15%, 17%, 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-11) are the following compounds. However, the compound represented by the general formula (N-1-11) is selected from a compound different from the compound represented by the general formula (N-ii) actually contained in the composition.

(In the formula, R ^N1111 and R ^N1112 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1111 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl, butyl, vinyl or 1-propenyl. R ^{N1112 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-11) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set less, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The preferable content range in relation to the compound represented by the general formula (N-1-11) described below is defined as including the compound represented by the general formula (N-ii) actually contained in the composition.

The lower limit of the preferable content of the compound represented by the formula (N-1-11) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (N-1-11) is preferably a compound selected from the group of compounds represented by the formula (N-1-11.1) to the formula (N-1-11.15), preferably the formula The compounds represented by (N-1-11.1) to (N-1-11.15) are preferably compounds represented by formula (N-1-11.2) and formula (N-1-11.4).

The compounds represented by the formula (N-1-11.2) and the formula (N-1-11.4) can be used alone or in combination, relative to the total amount of the composition of the present invention alone or the ratio of these compounds. The lower limit of the optimal content is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-12) are the following compounds.

(In the formula, R ^N1121 and R ^N1122 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1121 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl. R ^{N1122 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-12) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-12) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-13) is the following compound.

(In the formula, R ^N1131 and R ^N1132 each independently represent the same meaning as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1131 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl. R ^{N1132 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-13) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-13) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-14) are the following compounds.

(In the formula, R ^N1141 and R ^N1142 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1141 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl. R ^{N1142 is} preferably an alkyl group with 1-5 carbon atoms, an alkenyl group with 4-5 carbon atoms or an alkoxy group with 1-4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-14) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-14) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-15) are the following compounds.

(In the formula, R ^N1151 and R ^N1152 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1151 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl. R ^{N1152 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-15) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, the content is preferably set higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-15) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-16) is the following compound.

(In the formula, R ^N1161 and R ^N1162 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1161 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl. R ^{N1162 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by general formula (N-1-16) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, the content is preferably set higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-16) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-17) are the following compounds.

(In the formula, R ^N1171 and R ^N1172 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1171 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl. R ^{N1172 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-17) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-17) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-18) is the following compound.

(In the formula, R ^N1181 and R ^N1182 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^{N1181 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably methyl, ethyl, propyl or butyl. R ^{N1182 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-18) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-18) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (N-1-18) is preferably a compound selected from the group of compounds represented by the formula (N-1-18.1) to the formula (N-1-18.5), preferably the formula The compounds represented by (N-1-18.1) to (N-1-18.3) are preferably compounds represented by (N-1-18.2) and formula (N-1-18.3).

The compound represented by the general formula (N-1-20) is the following compound.

(In the formula, R ^N1201 and R ^N1202 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^N1201 and R ^{N1202 are} preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl.

The compound represented by the general formula (N-1-20) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-20) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, and 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compounds represented by the general formula (N-1-21) are the following compounds.

(In the formula, R ^N1211 and R ^N1212 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^N1211 and R ^{N1212 are} preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl.

The compound represented by the general formula (N-1-21) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) relative to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20%. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-22) is the following compound.

(In the formula, R ^N1221 and R ^N1222 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-1))

R ^N1221 and R ^{N1222 are} preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl.

The compound represented by the general formula (N-1-22) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set higher, and when the emphasis is on T _NI , if the content is set to be larger, the effect will be higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-22) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20% %. The preferable upper limit of the content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 5%.

Furthermore, the compound represented by the general formula (N-1-22) is preferably a compound selected from the group of compounds represented by the formula (N-1-22.1) to the formula (N-1-22.12), preferably the formula The compounds represented by (N-1-22.1) to (N-1-22.5) are preferably compounds represented by formulae (N-1-22.1) to (N-1-22.4).

The compound represented by the general formula (N-3) is preferably a compound selected from the group of compounds represented by the general formula (N-3-2).

(In the formula, R ^N321 and R ^N322 independently represent the same meanings as ^{R N11} and R ^N12 in the general formula (N-3))

R ^N321 and R ^{N322 are} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a propyl group or a pentyl group.

The compound represented by the general formula (N-3-2) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When emphasis is placed on the improvement of Δε, it is preferable to set the content higher, when the solubility at low temperature is important, the effect is higher when the content is set less, and when the emphasis is on T _NI , if the content is set to be smaller, the effect is higher. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (N-3-2) relative to the total amount of the composition of the present invention is 3%, 5%, 10%, 13%, 15%, 17%, 20% %, 23%, 25%, 27%, 30%, 33%, 35%. Regarding the preferable upper limit of the content, relative to the total amount of the composition of the present invention, it is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%.

Furthermore, the compound represented by general formula (N-3-2) is preferably a compound selected from the group of compounds represented by formula (N-3-2.1) to formula (N-3-2.3).

The composition of the present invention preferably contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a compound that is substantially neutral in terms of dielectric properties (the value of Δε is -2 to 2). However, the compound represented by the general formula (L) is selected from compounds different from the compounds represented by the general formulae (ii) and (iii) actually contained in the composition.

(In the formula, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may be independently represented by -CH= CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted, n ^L1 represents 0, 1, 2 or 3, and A ^L1 , A ^L2 and A ^L3 independently represent alternative free

(a) 1,4- cyclohexylene (in the presence of a group -CH ₂ - or two or more of the adjacent -CH ₂ - may be substituted with -O-) and

(b) 1,4-phenylene group (one -CH= present in the group or two or more non-adjacent -CH= may be substituted with -N=)

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (existing in naphthalene-2,6-diyl Diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, one -CH= or two or more non-adjacent -CH= may be substituted with -N=)

In the group formed, the above-mentioned group (a), group (b) and group (c) may be independently substituted by cyano group, fluorine atom or chlorine atom, Z ^L1 and Z ^L2 respectively independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN= CH-, -CH=CH-, -CF=CF- or -C≡C-, when n ^L1 is 2 or 3 and there are multiple A ^L2 , these can be the same or different, and n ^L1 is When there are a plurality of Z ^L2s of 2 or 3, these may be the same or different, except for the compounds represented by the general formulae (Ni) and (N-ii). )

The compound represented by the general formula (L) may be used alone or in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there is one kind. Or in other embodiment of this invention, it is 2 types, 3 types, 4 types, 5 types, 6 types, 7 types, 8 types, 9 types, 10 types or more.

In the composition of the present invention, the content of the compound represented by the general formula (L) must be based on the solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, drip marks, afterimages, and dielectric properties. It can be adjusted appropriately according to the required properties such as electrical anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L) relative to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60% , 65%, 70%, 75%, 80%. The preferable upper limit of the content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%. However, the range of the content also includes the value of the compounds represented by the general formulae (ii) and (iii) actually contained in the composition.

In the case where the viscosity of the composition of the present invention needs to be kept low and the response speed is fast, it is preferable that the lower limit value is higher and the upper limit value is higher. Furthermore, when the composition of the present invention is required to _{maintain a high T NI} and a composition having good temperature stability, it is preferable that the lower limit value is higher and the upper limit value is higher. In addition, when the dielectric anisotropy is to be increased in order to keep the driving voltage low, it is preferable to lower the lower limit value and lower the upper limit value.

In the case of attaching importance to reliability, R ^L1 and R ^{L2 are} preferably both alkyl groups, in the case of attaching importance to the reduction of the volatility of the compound, preferably an alkoxy group, and in the case of attaching importance to the reduction of viscosity, more Preferably, at least one of them is an alkenyl group.

The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3, preferably 0 or 1, and preferably 1 when compatibility with other liquid crystal molecules is important.

烷等飽和之環結構之情形時，較佳為直鏈狀之碳原子數1~5之烷基、直鏈狀之碳原子數1~4之烷氧基及直鏈狀之碳原子數2~5之烯基。為了使向列相穩定化，碳原子及於存在之情形時之氧原子之合計較佳為5以下，較佳為直鏈狀。 R ^L1 and R ^L2 are preferably straight-chain alkyl groups having 1 to 5 carbon atoms, or straight-chain carbon atoms having 1 to 5, when the ring structure to which they are bonded is a phenyl group (aromatic). The alkoxyl group of 4 and the alkenyl group of carbon number 4-5, the ring structure to which they are bonded are cyclohexane, pyran and two

In the case of a saturated ring structure such as an alkane, a straight-chain alkyl group having 1 to 5 carbon atoms, a straight-chain alkoxy group having 1 to 4 carbon atoms, and a straight-chain carbon number 2 are preferred. Alkenyl of ~5. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and preferably linear.

As an alkenyl group, the group represented by any one selected from formula (R1) to formula (R5) is preferable. (The black dots in the formulas represent the carbon atoms in the ring structure)

n ^L1 is preferably 0 when the response speed is important, and is preferably 2 or 3 in order to improve the upper limit temperature of the nematic phase, and preferably 1 in order to achieve the balance of these. Moreover, in order to satisfy|fill the characteristic requested|required as a composition, it is preferable to combine the compound of a different value.

A ^L1 , A ^L2 and A ^L3 are preferably aromatic when it is required to increase Δn, and are preferably aliphatic in order to improve the response speed, and preferably each independently represents trans-1,4-cycloextended Hexyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1 ,4-cyclohexenyl, 1,4-bicyclo[2.2.2]octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6- Diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably the following structure

More preferably, it represents trans-1,4-cyclohexylene or 1,4-phenylene.

When the response speed is important, Z ^L1 and Z ^{L2 are} preferably single keys.

The number of halogen atoms in the molecule of the compound represented by the general formula (L) is preferably 0 or 1.

The compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formulae (L-1) to (L-8).

The compound represented by the general formula (L-1) is the following compound. However, the compound represented by the general formula (L-1) is selected from compounds different from the compounds represented by the general formulae (ii) and (iii) actually contained in the composition.

(In the formula, R ^L11 and R ^L12 independently represent the same meanings as ^{R L1} and R ^L2 in the general formula (L))

R ^L11 and R ^{L12 are} preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms .

The compound represented by general formula (L-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are used in appropriate combinations according to the properties required such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

The preferable content range in relation to the compound represented by the general formula (L-1) described below is defined as including the compounds represented by the general formulae (ii) and (iii) actually contained in the composition.

The lower limit of the preferable content of the compound represented by formula (L-1) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%. The preferable upper limit of the content is 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50% with respect to the total amount of the composition of the present invention , 45%, 40%, 35%, 30%, 25%.

In the case where the viscosity of the composition of the present invention needs to be kept low and the response speed is fast, it is preferable that the lower limit value is higher and the upper limit value is higher. Furthermore, in the case where the composition of the present invention is required to _{maintain a high T NI} and a composition having good temperature stability, it is preferable that the lower limit value is in the middle and the upper limit value is in the middle. In addition, when the dielectric anisotropy is to be increased in order to keep the driving voltage low, the lower limit value is preferably lower and the upper limit value is lower.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-1). However, the compound represented by the general formula (L-1-1) is selected from a compound different from the compound represented by the general formula (iii) actually contained in the composition.

(In the formula, R ^L12 represents the same meaning as in the general formula (L-1))

The compound represented by the general formula (L-1-1) is preferably a compound selected from the group of compounds represented by the formula (L-1-1.1) to the formula (L-1-1.3), preferably the formula (L -1-1.2) or the compound represented by the formula (L-1-1.3), particularly preferably the compound represented by the formula (L-1-1.3).

The preferable content range in relation to the compound represented by the general formula (L-1-1) described below is defined as including the compound represented by the general formula (iii) actually contained in the composition.

The lower limit of the preferable content of the compound represented by the formula (L-1-1.3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, and 10%. The preferable upper limit of the content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, and 3% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-2). However, the compound represented by the general formula (L-1-2) is selected from a compound different from the compound represented by the general formula (iii) actually contained in the composition.

(In the formula, R ^L12 represents the same meaning as in the general formula (L-1))

The preferable content range in relation to the compound represented by the general formula (L-1-2) described below is defined as including the compound represented by the general formula (iii) actually contained in the composition.

The lower limit of the preferable content of the compound represented by the formula (L-1-2) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 15%, 17%, 20%, 23% %, 25%, 27%, 30%, 35%. The preferable upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (L-1-2) is preferably a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4), and is preferably the formula (L-1-2.2) to compounds represented by formula (L-1-2.4). The compound represented by the formula (L-1-2.2) is particularly preferable because it can improve the response speed of the composition of the present invention. In addition, when higher Tni is required than response speed, it is preferable to use the compound represented by formula (L-1-2.3) or formula (L-1-2.4). In order to make the solubility in low temperature favorable, it is unfavorable to make content of the compound represented by Formula (L-1-2.3) and Formula (L-1-2.4) 30% or more.

The lower limit of the preferable content of the compound represented by the formula (L-1-2.2) relative to the total amount of the composition of the present invention is 10%, 15%, 18%, 20%, 23%, 25%, 27% %, 30%, 33%, 35%, 38%, 40%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27% relative to the total amount of the composition of the present invention %, 25%, 22%.

The lower limit of the preferable content of the compound represented by the formula (L-1-1.3) and the compound represented by the formula (L-1-2.2) in total with respect to the total amount of the composition of the present invention is 10%, 15%, 20%, 25%, 27%, 30%, 35%, 40%. The preferable upper limit of the content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27%, 25%, 22%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-3). However, the compound represented by the general formula (L-1-3) is selected from a compound different from the compound represented by the general formula (ii) actually contained in the composition.

(In the formula, R ^L13 and R ^L14 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms)

R ^L13 and R ^{L14 are} preferably linear alkyl groups having 1 to 5 carbon atoms, and linear alkoxy groups having 1 to 4 carbon atoms.

The preferable content range in relation to the compound represented by the general formula (L-1-3) described below is defined as including the compound represented by the general formula (ii) actually contained in the composition.

The lower limit of the preferable content of the compound represented by the formula (L-1-3) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20% %, 23%, 25%, 30%. Regarding the preferable upper limit of the content, relative to the total amount of the composition of the present invention, it is 60%, 55%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.

Furthermore, the compound represented by the general formula (L-1-3) is preferably a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.12), preferably the formula (L-1-3.1), a compound represented by formula (L-1-3.3) or formula (L-1-3.4). The compound represented by the formula (L-1-3.1) is particularly preferable because it can improve the response speed of the composition of the present invention. _{In addition, when higher T NI} is required than response speed, it is preferable to use formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11), and formula (L- 1-3.12) represented by the compound. In order to make the solubility at low temperature good, the total of the compounds represented by the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11) and the formula (L-1-3.12) It is unfavorable to make content 20% or more.

The lower limit of the preferable content of the compound represented by the formula (L-1-3.1) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13% %, 15%, 18%, 20%. The preferable upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, 7%, 6% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-4) and/or (L-1-5). However, the compounds represented by the general formulae (L-1-4) and (L-1-5) are selected from compounds different from the compounds represented by the general formula (iii) actually contained in the composition.

(In the formula, R ^L15 and R ^L16 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms)

R ^L15 and R ^{L16 are} preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms .

The preferred content range related to the compounds represented by the general formula (N-1-4) and the general formula (N-1-5) described below is defined as: including the general formula ( The compound represented by N-ii).

The lower limit of the preferable content of the compound represented by the formula (L-1-4) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20% %. The preferable upper limit of the content is 25%, 23%, 20%, 17%, 15%, 13%, 10% with respect to the total amount of the composition of the present invention.

The lower limit of the preferable content of the compound represented by the formula (L-1-5) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20% %. The preferable upper limit of the content is 25%, 23%, 20%, 17%, 15%, 13%, 10% with respect to the total amount of the composition of the present invention.

Furthermore, the compounds represented by the general formulae (L-1-4) and (L-1-5) are preferably selected from the group of compounds represented by the formulae (L-1-4.1) to (L-1-5.3) Among them, the compound is preferably a compound represented by formula (L-1-4.2) or formula (L-1-5.2).

The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13% %, 15%, 18%, 20%. The preferable upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, 7% and 6% with respect to the total amount of the composition of the present invention.

Preferably, the combination is selected from formula (L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) , two or more compounds in the compounds represented by formula (L-1-3.11) and formula (L-1-3.12), preferably in combination selected from formula (L-1-1.3), formula (L-1 -2.2), two or more compounds among the compounds represented by formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and formula (L-1-4.2) , the preferred lower limit of the total content of these compounds is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15% relative to the total amount of the composition of the present invention %, 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, the upper limit is 80%, 70%, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23%, 20%. When the reliability of the composition is important, it is preferable to combine two compounds selected from the compounds represented by the formula (L-1-3.1), the formula (L-1-3.3) and the formula (L-1-3.4) More than one compound, when the response speed of the composition is important, is preferably a combination of two or more compounds selected from the compounds represented by formula (L-1-1.3) and formula (L-1-2.2) .

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-6). However, the compound represented by the general formula (L-1-6) is selected from a compound different from the compound represented by the general formula (iii) actually contained in the composition.

(in the formula, R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom)

The preferable content range in relation to the compound represented by the general formula (N-1-6) described below is defined as including the compound represented by the general formula (N-ii) actually contained in the composition.

The lower limit of the preferable content of the compound represented by the formula (L-1-6) relative to the total amount of the composition of the present invention is 1%, 5%, 10%, 15%, 17%, 20%, 23% %, 25%, 27%, 30%, 35%. The preferable upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by general formula (L-1-6) is preferably a compound selected from the group of compounds represented by formula (L-1-6.1) to formula (L-1-6.3).

The compound represented by the general formula (L-2) is the following compound.

(In the formula, R ^L21 and R ^L22 independently represent the same meanings as ^{R L1} and R ^L2 in the general formula (L))

R ^{L21 is} preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and R ^{L22 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or An alkoxy group having 1 to 4 carbon atoms.

The compound represented by general formula (L-1) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

When the solubility at low temperature is important, the effect is high when the content is set to be large, and on the contrary, when the response speed is emphasized, the effect is high when the content is set to be small. Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

The lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, and 10%. The preferable upper limit of the content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by the general formula (L-2) is preferably a compound selected from the group of compounds represented by the formula (L-2.1) to the formula (L-2.6), preferably the formula (L-2.1), Compounds represented by formula (L-2.3), formula (L-2.4) and formula (L-2.6).

The compound represented by the general formula (L-3) is the following compound.

(In the formula, R ^L31 and R ^L32 independently represent the same meanings as ^{R L1} and R ^L2 in the general formula (L))

R ^L31 and R ^L32 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

The compound represented by the general formula (L-3) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

The lower limit of the preferable content of the compound represented by the formula (L-3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, and 10%. The preferable upper limit of the content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3% with respect to the total amount of the composition of the present invention.

In the case of obtaining higher birefringence, the effect is higher when the content is set to be larger, and conversely, when the content is set to be smaller, the effect is higher when the content of _{higher T NI is emphasized.} Furthermore, in the case of improving drip marks or afterimage characteristics, it is preferable to set the range of the content to the middle.

Further, the compound represented by the general formula (L-3) is preferably a compound selected from the group of compounds represented by the formula (L-3.1) to the formula (L-3.4), preferably the formula (L-3.2) to A compound represented by formula (L-3.7).

The compound represented by the general formula (L-4) is the following compound.

(In the formula, R ^L41 and R ^L42 independently represent the same meanings as ^{R L1} and R ^L2 in the general formula (L))

R ^{L41 is} preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and R ^{L42 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or Alkoxy with 1 to 4 carbon atoms)

The compound represented by the general formula (L-4) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are used in appropriate combinations according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, drip marks, and afterimages. , dielectric anisotropy and other required properties and appropriately adjusted.

The lower limit of the preferable content of the compound represented by formula (L-4) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. The preferable upper limit of the content of the compound represented by formula (L-4) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5%.

The compound represented by the general formula (L-4) is preferably a compound represented by the formula (L-4.1) to (L-4.3), for example.

According to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., the compound represented by formula (L-4.1) may be contained, the compound represented by formula (L-4.2) may be contained, and the compound represented by formula (L-4.2) may be contained. Both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2) may be contained, or all the compounds represented by the formula (L-4.1) to (L-4.3) may be contained. The lower limit of the preferable content of the compound represented by formula (L-4.1) or formula (L-4.2) relative to the total amount of the composition of the present invention is 3%, 5%, 7%, 9%, 11% , 12%, 13%, 18%, 21%, the best upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10 %,8%.

In the case where both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2) are contained, the lower limit of the preferable content of the two compounds relative to the total amount of the composition of the present invention It is 15%, 19%, 24%, 30%, and the preferred upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably, for example, the compound represented by the formula (L-4.4) to (L-4.6), and more preferably the compound represented by the formula (L-4.4).

According to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., the compound represented by the formula (L-4.4) may be contained, the compound represented by the formula (L-4.5) may be contained, or Both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) may be contained.

The lower limit of the preferable content of the compound represented by formula (L-4.4) or formula (L-4.5) relative to the total amount of the composition of the present invention is 3%, 5%, 7%, 9%, 11% , 12%, 13%, 18%, 21%. The preferred upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

In the case of containing both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5), the lower limit of the preferable content of the two compounds relative to the total amount of the composition of the present invention It is 15%, 19%, 24%, 30%, and the preferred upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably the compound represented by the formula (L-4.7) to (L-4.10), and particularly preferably the compound represented by the formula (L-4.9).

The compound represented by the general formula (L-5) is the following compound.

(In the formula, R ^L51 and R ^L52 independently represent the same meanings as ^{R L1} and R ^L2 in the general formula (L))

R ^{L51 is} preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and R ^{L52 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or An alkoxy group having 1 to 4 carbon atoms.

The compound represented by the general formula (L-5) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, drip marks, and afterimages. , dielectric anisotropy and other required properties and appropriately adjusted.

The lower limit of the preferable content of the compound represented by formula (L-5) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. The upper limit of the preferable content of the compound represented by the formula (L-5) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, 30%, 20%, 15%, 10% , 5%

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.1) or formula (L-5.2), particularly preferably a compound represented by formula (L-5.1).

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The preferable upper limit of the content of these compounds is 20%, 15%, 13%, 10% and 9%.

The compound represented by the general formula (L-5) is preferably a compound represented by the formula (L-5.3) or the formula (L-5.4).

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The preferable upper limit of the content of these compounds is 20%, 15%, 13%, 10% and 9%.

The compound represented by the general formula (L-5) is preferably a compound selected from the group of compounds represented by the formula (L-5.5) to the formula (L-5.7), particularly preferably the compound represented by the formula (L-5.7) compound.

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The preferable upper limit of the content of these compounds is 20%, 15%, 13%, 10%, 9%.

The compound represented by the general formula (L-6) is the following compound.

(In the formula, R ^L61 and R ^L62 independently represent the same meanings as ^{R L1} and R ^L2 in the general formula (L), ^{and X L61} and X ^L62 each independently represent a hydrogen atom or a fluorine atom)

R ^L61 and R ^{L62 are} preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably one of ^XL61 and ^XL62 is a fluorine atom and the other is a fluorine atom. are hydrogen atoms.

The compound represented by the general formula (L-6) may be used alone, or two or more compounds may be used in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1, 2, 3, 4, 5 or more kinds.

The lower limit of the preferable content of the compound represented by formula (L-6) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. The preferred upper limit of the content of the compound represented by formula (L-6) relative to the total amount of the composition of the present invention is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5%. When the emphasis is placed on increasing Δn, the content is preferably increased, and when the emphasis is placed on precipitation at low temperatures, the content is preferably small.

The compound represented by general formula (L-6) is preferably a compound represented by formula (L-6.1) to formula (L-6.9).

The types of the compounds that can be combined are not particularly limited, but it is preferable to contain one to three kinds of these compounds, and more preferably to contain one to four kinds. Moreover, since the molecular weight distribution of the selected compound is wide and the solubility is also effective, it is preferable to select one compound from the compounds represented by the formula (L-6.1) or (L-6.2), for example, from the formula (L-6.2). -6.4) or (L-6.5), select one compound, select one compound from the compounds represented by formula (L-6.6) or formula (L-6.7), select one compound from formula (L-6.8) Or one compound is selected from the compounds represented by (L-6.9), and these are appropriately combined. Among them, compounds represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6) and formula (L-6.9) are preferably included.

Furthermore, the compound represented by the general formula (L-6) is preferably, for example, the compound represented by the formula (L-6.10) to the formula (L-6.17), and among them, the compound represented by the formula (L-6.11) is preferable. .

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The preferable upper limit of the content of these compounds is 20%, 15%, 13%, 10% and 9%.

The compound represented by the general formula (L-7) is the following compound.

(Wherein, R ^L71 and R ^L72 each independently represent the same meaning as the general formula (L) in the R ^L1 and R ^L2, A ^L71 and A ^L72 each independently represents general formula (L) and A ^L2 of the A ^{L3 has the} same meaning, ^{the hydrogen atoms on A L71} and A ^L72 can be independently substituted by fluorine atoms, Z ^L71 represents the same meaning as ^{Z L2} in the general formula (L), ^{and X L71} and X ^L72 represent independently fluorine atom or hydrogen atom)

In the formula, R ^L71 and R ^{L72 are} preferably respectively independently an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, A ^L71 and A ^{L72 is} preferably each independently 1,4-cyclohexylene or 1,4-phenylene, ^{the hydrogen atoms on A L71} and A ^L72 can be independently substituted by fluorine atoms, Z ^{L71 is} preferably a single bond or COO- is preferably a single bond, and ^XL71 and ^{XL72 are} preferably hydrogen atoms.

The types of compounds that can be combined are not particularly limited, and are combined according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1 type, 2 types, 3 types, and 4 types.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, drip marks, and afterimages. , dielectric anisotropy and other required properties and appropriately adjusted.

The lower limit of the preferable content of the compound represented by formula (L-7) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%. The preferred upper limit of the content of the compound represented by formula (L-7) relative to the total amount of the composition of the present invention is 30%, 25%, 23%, 20%, 18%, 15%, 10%, 5%.

When the composition of the present invention is expected to have a higher _TNI , it is preferable to increase the content of the compound represented by the formula (L-7), and when the embodiment of a low viscosity is expected , it is preferable to make the content less.

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.1) to (L-7.4), and more preferably a compound represented by formula (L-7.2).

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.11) to (L-7.13), and more preferably a compound represented by formula (L-7.11).

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.21) to formula (L-7.23). The compound represented by formula (L-7.21) is preferable.

Furthermore, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.31) to the formula (L-7.34), preferably the formula (L-7.31) or/and the formula (L- 7.32) The compound represented.

Furthermore, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.41) to the formula (L-7.44), preferably the formula (L-7.41) or/and the formula (L- 7.42) The compound represented.

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.51) to formula (L-7.53).

The compound represented by the general formula (L-8) is the following compound.

(Wherein, R ^L81 and R ^L82 each independently represents general formula (R) are of the same meaning as L ^L1 and R ^L2, A ^L81 represents the same as the general formula (L) in the meaning of A ^L1, or a single bond, The hydrogen atoms on A ^L81 can be independently substituted by fluorine atoms, and X ^L81 ~ X ^L86 independently represent fluorine atoms or hydrogen atoms)

Wherein, R ^L81 and R ^L82 is each independently preferably represent an alkyl group having 1 to 5 carbon atoms, the carbon atoms of the alkenyl group having 2 to 5 carbon atoms or an alkoxy group of 1 to 4, A ^L81 preferred is 1,4-cyclohexylene or 1,4-phenylene, and the ^{hydrogen atoms on A L71 and A L72} can be independently substituted by fluorine atoms, preferably on the same ring structure in the general formula (L-8) , 0 or 1 fluorine atom, preferably 0 or 1 fluorine atom in the molecule.

The types of compounds that can be combined are not particularly limited, and are combined according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound to be used, for example, as one embodiment of the present invention, there are 1 type, 2 types, 3 types, and 4 types.

In the composition of the present invention, the content of the compound represented by the general formula (L-8) must be based on solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, drip marks, and afterimages. , dielectric anisotropy and other required properties and appropriately adjusted.

The lower limit of the preferable content of the compound represented by formula (L-8) relative to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16%, 20%. The preferred upper limit of the content of the compound represented by formula (L-8) relative to the total amount of the composition of the present invention is 30%, 25%, 23%, 20%, 18%, 15%, 10%, 5%.

In the composition of the present invention, _{when an embodiment with a high T NI} is expected, the content of the compound represented by the formula (L-8) is preferably increased, and when an embodiment with a low viscosity is expected , it is preferable to make the content less.

Furthermore, the compound represented by general formula (L-8) is preferably a compound represented by formula (L-8.1) to formula (L-8.4), more preferably formula (L-8.3) and formula (L-8.5) , the compound represented by the formula (L-8.6), the formula (L-8.13), the formula (L-8.16) to the formula (L-8.18), the formula (L-8.23) to the formula (L-8.28).

The preferred content ranges described below in relation to the compounds represented by the general formulae (i), (L), (N-1), (N-2) and (N-3) are defined as: including the composition The compounds represented by the general formulas (ii), (iii), (Ni), and (N-ii) actually contained in it.

The lower limit of the preferable content of the total of the compounds represented by the general formulae (i), (L), (N-1), (N-2) and (N-3) relative to the total amount of the composition of the present invention Values are 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The preferable upper limit of the content is 100%, 99%, 98% and 95%. Among them, from the viewpoint of obtaining a composition having a large absolute value of Δε, preferably any one of the compounds represented by the general formulae (N-1), (N-2) and (N-3) is: 5% or less, preferably 3% or less, preferably 0%.

The lower limit of the preferred content of the total of the compounds represented by the general formulas (L-1) to (L-8) and the general formulas (N-1a) to (N-1g) relative to the total amount of the composition of the present invention Values are 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The preferable upper limit of the content is 100%, 99%, 98% and 95%.

The preferred ratio of the sum of the compounds represented by the general formulae (L-1) to (L-8) and the general formulae (N-1-1) to (N-1-21) relative to the total amount of the composition of the present invention The lower limit of the content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The preferable upper limit of the content is 100%, 99%, 98% and 95%.

The composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms are bonded to each other, such as a peracid (-CO-OO-) structure, in the molecule.

When the reliability and long-term stability of the composition are emphasized, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less, with respect to the total mass of the composition. It is preferable to make it 1% or less, and it is preferable that it does not contain substantially.

When the stability due to UV irradiation is important, the content of the compound substituted with chlorine atom is preferably 15% or less, preferably 10% or less, with respect to the total mass of the above-mentioned composition, Preferably it is 8% or less, More preferably, it is 5% or less, More preferably, it is 3% or less, More preferably, it does not contain substantially.

It is preferable to increase the content of the compound whose ring structure is 6-membered ring in the molecule, and it is preferable to set the content of the compound whose ring structure is 6-membered ring in the molecule to 80% with respect to the total mass of the above-mentioned composition. Above, more preferably 90% or more, more preferably 95% or more, and it is more preferable to constitute a composition substantially only from a compound having a 6-membered ring structure in the molecule.

In order to suppress the deterioration caused by the oxidation of the composition, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and it is preferable to set the content of the compound having a cyclohexene group relative to the content of the above-mentioned composition. The total mass is 10% or less, preferably 8% or less, more preferably 5% or less, more preferably 3% or less, and more preferably not substantially contained.

When emphasis is placed on the improvement of viscosity and the improvement of T _NI , it is preferable to reduce the content of the compound having 2-methylbenzene-1,4-diyl in which a hydrogen atom can be substituted with halogen in the molecule, preferably The content of the compound having 2-methylbenzene-1,4-diyl in the molecule is 10% or less, preferably 8% or less, more preferably 8% or less with respect to the total mass of the composition. It is 5% or less, preferably 3% or less, and more preferably not substantially contained.

In the present invention, the term "substantially not contained" means not contained except for those contained unintentionally.

When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, when the above-mentioned alkenyl group is bonded to cyclohexane, the number of carbon atoms of the alkenyl group is preferably 2 to 5. When the above alkenyl group is bonded to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, preferably the unsaturated bond of the above alkenyl group is not directly bonded to benzene.

[Liquid crystal display element]

The liquid crystal composition of the present invention is preferably used for liquid crystal display elements. Since the liquid crystal composition of the present invention can maintain the same reliability and low temperature storage properties as conventional liquid crystal compositions used for liquid crystal display elements, it can also be preferably used as a substitute for conventional liquid crystal compositions. In addition, the liquid crystal composition of the present invention can also be applied to novel liquid crystal display elements requiring higher electrical properties than conventional ones.

The above-mentioned liquid crystal display element is preferably a liquid crystal display element for active matrix driving, and among them, a liquid crystal display element for VA mode, IPS mode or FFS mode is preferred. In addition to using the liquid crystal composition of this invention as a liquid crystal composition about each said liquid crystal display element, a conventionally well-known structure can also be used.

[Example]

The following examples are given to describe the present invention in further detail, but the present invention is not limited by these examples. In addition, "%" in the composition of the following Examples and Comparative Examples means "mass %".

The properties measured in the examples are as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (°C)

Δn: Refractive index anisotropy at 20°C

Δε: Dielectric anisotropy at 20°C

γ ₁ : Rotational viscosity at 20°C (mPa·s)

Low temperature storage property: Put an appropriate amount of the liquid crystal composition into a 0.5 g small glass bottle, and store it at a temperature of -20°C. During storage, the presence or absence of precipitation was visually observed over two weeks. As a result, when precipitation was confirmed after one week, it was set as ×, when one week passed, no precipitation was confirmed, and when two weeks passed, when precipitation was confirmed, it was set as ○, and when two weeks passed, no precipitation was observed. case, set as ◎.

Reliability (VHR (UV)): For the liquid crystal composition, use a high-pressure mercury lamp to irradiate light with an illuminance of 100 mW/cm ² at 365 nm for 120 seconds, and then measure the voltage holding ratio at a frequency of 60 Hz, an applied voltage of 1 V, and a temperature of 60 °C . As a result, what was 80.0% or more was made into ⊚, and what was less than 80.0 was made into ×.

Regarding the description of the compounds in the examples, the following abbreviations are used.

In addition, all the side chains shown below are made into a linear form.

(side chain)

-n -C _n H _2n+1

n- C _n H _2n+1 -

-On -OC _n H _2n+1

nO- C _n H _2n+1 O-

-nO- -C _n H _2n O-

-V -CH=CH ₂

V- CH ₂ =CH-

-Vn -CH=CH-C _n H _2n+1

nV- C _n H _2n+1 -CH=CH-

-OnV -OC _n H _2n CH=CH ₂

-OnVm -OC _n H _2n CH=C _m H _2m

(ring structure)

(Example 1, Comparative Examples 1 to 5)

Liquid crystal compositions having the respective compositions of Examples and Comparative Examples shown in (Table 1) were prepared by an ordinary method. Here, in a liquid crystal phase temperature range of 75° C. or higher, which is practical for use as a liquid crystal element for TV, a composition system having both Δε and Δn at a high level has been verified. Specifically, the composition system of Δε≦-2.7 and Δn≧0.108 is targeted.

About each obtained liquid crystal composition, the characteristic of each item shown in (Table 1) was measured. The evaluation results are shown in the table.

The measurement of reliability used the VA liquid crystal display element produced using the said liquid crystal composition. The VA liquid crystal display element has an inverse staggered thin film transistor as an active element. The injection of the liquid crystal composition is performed by a dropwise method. Hereinafter, the measurement was performed in the same manner in any of the Examples and Comparative Examples.

The liquid crystal composition of Example 1 has high absolute values of Δε and Δn. Furthermore, γ1, low-temperature storage properties, and reliability were also favorable. From this result, it was shown that the liquid crystal composition of Example 1 has excellent performance and practicability for use as a liquid crystal display element.

On the other hand, the compounds represented by the general formula (i), the general formula (ii), the general formula (iii), the general formula (Ni) or the general formula (N-ii) in Comparative Examples 1 to 5 were not properly adjusted. Therefore, as described below, any one of the properties is deteriorated, or there is a problem in practicality.

Since Comparative Example 1 did not contain the compound represented by the general formula (i), the target values of Δn and Δε were not reached.

Since Comparative Example 2 contained 29 parts by weight of the compound represented by the general formula (ii), the low-temperature storage properties were deteriorated.

Since Comparative Example 3 contained 24 parts by weight of the compound represented by the general formula (iii), reliability deteriorated.

Since Comparative Examples 4 and 5 did not contain any of the compounds represented by the general formula (N-i) and the general formula (N-ii), the target value of Δn was not reached.

(Examples 2 to 6)

Liquid crystal compositions having the respective compositions of the examples shown in (Table 2) were prepared by ordinary methods. Here, verification is performed for a composition system focusing on Δε. Specifically, the composition system of Δε≦-3.0 is targeted.

About each obtained liquid crystal composition, the characteristic of each item shown to (Table 2) was measured. The evaluation results are shown in the table.

Any of the examples showed excellent performance and utility. In particular, Example 2 was excellent in Δn and Δε, and Example 3 and Example 5 were excellent in low-temperature storage properties.

From this result, it was shown that the liquid crystal compositions of any of the examples have excellent performance and practicality for use as liquid crystal elements.

Claims (8)

A liquid crystal composition comprising a compound represented by general formula (i), a compound represented by general formula (ii), a compound represented by general formula (iii), and a compound represented by general formula (N-ii), The content of the compound represented by the general formula (ii) is 1% by weight or more and 24% by weight or less, and the content of the compound represented by the general formula (iii) is more than 0% by weight and 15% by weight or less, and contains 4% by weight or more The compound represented by the general formula (N-ii) is an essential component, and the compound represented by the general formula (ii) above contains a compound selected from the group of compounds represented by the following formulas (ii.1) to (ii.4) compound of,

(In the formula, R ⁱ¹ and R ⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted)

(In the formula, R ⁱⁱ¹ and R ⁱⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms)

(In the formula, R ⁱⁱⁱ¹ represents an alkenyl group with 2 to 8 carbon atoms, and R ⁱⁱⁱ² represents an alkyl group with 1 to 8 carbon atoms or an alkenyl group with 2 to 8 carbon atoms)

(In the formula, R ^Nii1 and R ^Nii2 each independently represent an alkyl group with 1 to 8 carbon atoms, and one or two or more of the non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted, n ^Nii1 represents 1 or 2)

The liquid crystal composition according to claim 1, wherein in the general formula (i), R ⁱ¹ and R ⁱ² each independently represent an alkoxy group having 1 to 8 carbon atoms. The liquid crystal composition according to claim 1 or 2, wherein in the general formula (N-ii), n ^Nii1 represents 2. The liquid crystal composition according to claim 1 or 2, wherein the content of the compound represented by the general formula (i) is 1% by weight or more and 15% by weight or less. The liquid crystal composition according to claim 1 or 2, further comprising a compound represented by the general formula (Ni),

(In the formula, R ^Ni1 and R ^Ni2 each independently represent an alkyl group with 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may also be independently -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted). A liquid crystal display element using the liquid crystal composition according to any one of claims 1 to 5. A liquid crystal display element for active matrix driving using the liquid crystal composition according to any one of claims 1 to 5. A liquid crystal display element for VA mode, IPS mode, or FFS mode, which uses the liquid crystal composition according to any one of claims 1 to 5.