WO2017149981A1 - 粘着剤組成物及び粘着シート - Google Patents
粘着剤組成物及び粘着シート Download PDFInfo
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- WO2017149981A1 WO2017149981A1 PCT/JP2017/001818 JP2017001818W WO2017149981A1 WO 2017149981 A1 WO2017149981 A1 WO 2017149981A1 JP 2017001818 W JP2017001818 W JP 2017001818W WO 2017149981 A1 WO2017149981 A1 WO 2017149981A1
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- Prior art keywords
- pressure
- sensitive adhesive
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- polymer
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
Definitions
- the present invention relates to an adhesive composition and an adhesive sheet.
- Adhesives are widely used when bonding parts together.
- One of the uses of the pressure-sensitive adhesive is to temporarily fix the members to each other. For example, in the semiconductor wafer dicing process, the semiconductor wafer is cut in a state where the semiconductor wafer is temporarily fixed to the frame with an adhesive. Then, after the semiconductor wafer has been cut, the semiconductor wafer is removed from the frame.
- the pressure-sensitive adhesive used for such temporary fixing is required to have a sufficient adhesive force and can be peeled easily and without adhesive residue when temporary fixing is no longer necessary. Such an adhesive is required to be peeled off easily and without adhesive residue even when the components are bonded together and then subjected to the heating process together with the bonded components.
- the adhesive strength before ultraviolet irradiation is insufficient, and the decrease in the adhesive strength due to ultraviolet irradiation is also insufficient, and also sufficient for reducing the adhesive residue.
- the above conventional pressure-sensitive adhesive composition increases the adhesive strength when heated in a state of being bonded to an adherend, but this results in an insufficient decrease in the adhesive strength due to ultraviolet irradiation, resulting in adhesive residue.
- the pressure-sensitive adhesive composition is required to be excellent in embedding property of the pressure-sensitive adhesive layer to be formed and to be used satisfactorily for an adherend having a step or the like.
- the present invention has been made on the basis of the circumstances as described above, and its purpose is to provide a sufficiently high adhesive strength before ultraviolet irradiation regardless of the presence or absence of heating, and a sufficient decrease in adhesive strength due to ultraviolet irradiation. It is an object of the present invention to provide a pressure-sensitive adhesive composition that is large, has a small amount of adhesive residue, and has excellent embedding properties, and a pressure-sensitive adhesive sheet using this pressure-sensitive adhesive composition.
- the invention made in order to solve the above-mentioned problems includes a structural unit derived from methyl acrylate (hereinafter also referred to as “structural unit (I)”) and a polymerizable carbon-carbon double bond-containing group (hereinafter referred to as “double structure”).
- the content ratio of the structural unit (I) with respect to all structural units constituting the polymer [A] is 1% by mass or more and 60% by mass or less.
- Another invention made in order to solve the above-mentioned problems comprises a sheet-like base material and a pressure-sensitive adhesive layer laminated on one surface of the base material, and the pressure-sensitive adhesive layer comprises the pressure-sensitive adhesive composition. It is the adhesive sheet formed from.
- the pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet of the present invention regardless of the presence or absence of heating, the pressure-sensitive adhesive force before UV irradiation is sufficiently high, the amount of decrease in the pressure-sensitive adhesive strength by UV irradiation is sufficiently large, and the adhesive residue is sufficient Moreover, the pressure-sensitive adhesive layer to be formed is excellent in embeddability and can be suitably used for an adherend having a step or the like. Moreover, even when heated in a bonded state, it can be peeled off without any adhesive residue by ultraviolet irradiation. Therefore, the said adhesive composition and adhesive sheet can be used suitably in various manufacturing processes, such as the dicing process of the semiconductor wafer which has a heating process.
- the pressure-sensitive adhesive composition contains [A] a polymer, [B] a photopolymerization initiator, and [C] a thermosetting agent. Moreover, the said adhesive composition does not contain a polyfunctional monomer or a polyfunctional oligomer substantially.
- the pressure-sensitive adhesive composition may contain an optional component other than the components [A] to [C].
- the pressure-sensitive adhesive composition has a sufficiently high adhesive strength before ultraviolet irradiation regardless of the presence or absence of heating, a sufficiently large decrease in adhesive strength due to ultraviolet irradiation, a small amount of adhesive residue, and excellent embedding properties. .
- the reason why the pressure-sensitive adhesive composition exhibits the above-described effect by having the above-described configuration is not necessarily clear, but can be inferred as follows, for example. That is, the pressure-sensitive adhesive composition contains [A] to [C] components, and the [A] polymer together with the double bond-containing group (A) is a structural unit derived from methyl acrylate having a content ratio in the specific range. (I).
- the structural unit (I) derived from methyl acrylate is three-dimensionally small, an adhesive structure formed from [A] polymer and [C] thermosetting agent and the interaction with the adherend Can be made larger, and as a result, the adhesive strength before curing can be made sufficiently high.
- the structural unit (I) derived from methyl acrylate is sterically small, the bond between the double bond-containing groups (A) of the [A] polymer by the [B] photopolymerization initiator It is considered that the formation occurs more effectively, and as a result, the decrease in the adhesive strength after curing by ultraviolet irradiation is sufficiently large, and the adhesive residue is sufficiently reduced.
- the pressure-sensitive adhesive composition is substantially free of a polyfunctional monomer or polyfunctional oligomer.
- the pressure-sensitive adhesive composition does not substantially contain a polyfunctional monomer or a polyfunctional oligomer, so that when the pressure-sensitive adhesive layer is cured, low molecular weight components such as oligomers that are considered to be caused by the polyfunctional monomer are generated. It is thought that it can suppress, As a result, adhesive residue can further be reduced further enough.
- the [A] polymer has the structural unit (I) derived from sterically small methyl acrylate as described above in a content ratio within the specific range, it can relatively freely move in the molecule. As a result, the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition is also excellent in embeddability.
- each component will be described.
- the polymer is a polymer having the structural unit (I) and the double bond-containing group (A).
- the polymer is a structural unit derived from a (meth) acrylic acid alkyl ester containing an alkyl group having 4 to 10 carbon atoms in addition to the structural unit (I) (hereinafter also referred to as “structural unit (II)”).
- structural unit (II) Preferably having a structural unit containing a hydroxy group (hereinafter also referred to as “structural unit (III)”) and / or a structural unit containing an epoxy group (hereinafter also referred to as “structural unit (IV)”).
- structural unit (III) a structural unit containing a hydroxy group
- structural unit (IV) a structural unit containing an epoxy group
- Other structural units other than the units (I) to (IV) may be further included.
- the double bond-containing group (A) may be contained in the structural units (II) to (IV) and other structural units.
- the double bond-containing group (A) is a group containing a polymerizable carbon-carbon double bond.
- a polymerizable carbon-carbon double bond means an ethylenic carbon-carbon double bond.
- the double bond-containing group (A) is not particularly limited as long as it contains a polymerizable carbon-carbon double bond, and examples thereof include a (meth) acryloyl group, a vinyl group, an allyl group, and a styryl group. Among these, a (meth) acryloyl group is preferable from the viewpoints of excellent polymerizability and a sufficiently large decrease in the adhesive strength after ultraviolet irradiation.
- the polymer may have a double bond-containing group (A) in any of the main chain, the side chain, and the terminal, but the polymerizability of the polymerizable carbon-carbon double bond is improved, and an ultraviolet ray From the viewpoint of sufficiently increasing the decrease in the adhesive strength after irradiation, it is preferable to have the side chain.
- a precursor polymer having at least one of a hydroxy group and an epoxy group is prepared, and (1) a precursor polymer A method of reacting an isocyanate group of a compound having an isocyanate group and a double bond-containing group (A) with the hydroxy group of (2), (2) a carboxy group and a double bond-containing group (A) to the epoxy group of the precursor polymer (3) a method of reacting a carboxy group of a compound having carboxy group of a compound having a carboxy group and a double bond-containing group (A) with a hydroxy group of a precursor polymer, The method etc. which use two or more of (3) together are mentioned.
- the double bond-containing group (A) is introduced into the side chain of the precursor polymer and a urethane group is formed.
- Examples of the compound having an isocyanate group and a double bond-containing group (A) include (meth) acryloylalkyl isocyanates such as 2- (meth) acryloyloxyethyl isocyanate and 2- (meth) acryloyloxypropyl isocyanate; 2- (2 Examples include 2- (2- (meth) acryloyloxyalkyloxy) alkyl isocyanate such as-(meth) acryloyloxyethyloxy) ethyl isocyanate and 2- (2- (meth) acryloyloxypropyloxy) propyl isocyanate.
- Examples of commercially available 2- (meth) acryloyloxyethyl isocyanate include “Karenz AOI” and “Karenz MOI” manufactured by Showa Denko KK.
- Examples of commercially available 2- (2-methacryloyloxyethyloxy) ethyl isocyanate include “Karenz MOIEG” from Showa Denko.
- Examples of the compound having a carboxy group and a double bond-containing group (A) include (meth) acrylic acid; carboxyalkyl (meth) acrylates such as carboxymethyl (meth) acrylate and carboxyethyl (meth) acrylate.
- a precursor polymer having at least one of a hydroxy group and an epoxy group is prepared, and (4 ) One of the isocyanate groups of the polyisocyanate compound is reacted with the hydroxy group of the precursor polymer, and the other isocyanate group of the polyisocyanate compound has a hydroxyl group and a double bond-containing group (A).
- polyisocyanate compound examples include methylene diphenyl diisocyanate (MDI), tolylene diisocyanate (TDI), isophorone diisocyanate (IPDI), and the like.
- MDI methylene diphenyl diisocyanate
- TDI tolylene diisocyanate
- IPDI isophorone diisocyanate
- polycarboxylic acid compound examples include aliphatic dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, and adipic acid, and aromatic dicarboxylic acids such as phthalic acid and terephthalic acid.
- the lower limit of the content of the double bond-containing group (A) in the polymer is preferably 0.6% by mass, more preferably 0.8% by mass, still more preferably 0.9% by mass. 0% by mass is particularly preferred.
- As an upper limit of the said content rate 10 mass% is preferable, 5 mass% is more preferable, 4 mass% is further more preferable, and 3 mass% is especially preferable.
- the content rate of a double bond containing group (A) into the said range the fall width of the adhesive force by ultraviolet irradiation can be enlarged more fully, and adhesive residue can be reduced more fully.
- the content (% by mass) of the double bond-containing group (A) in the polymer is obtained by dividing the total mass of each atom constituting the double bond-containing group (A) by the total mass of the polymer. Can be sought.
- the structural unit (I) is a structural unit derived from methyl acrylate.
- the structural unit (I) has a structure represented by —CH 2 —CH (COOCH 3 ) —.
- the content rate of structural unit (I) it is 1 mass% with respect to all the structural units which comprise a [A] polymer, 5 mass% is preferable, 10 mass% is more preferable, and 20 mass% is More preferred is 30% by mass. As an upper limit of the said content rate, it is 60 mass%, 55 mass% is preferable, 50 mass% is more preferable, 45 mass% is further more preferable, 40 mass% is especially preferable.
- the content ratio of the structural unit (I) is less than the above lower limit, it is considered that the strength of the pressure-sensitive adhesive layer is reduced, and as a result, the adhesive strength before ultraviolet irradiation is reduced, the adhesive residue is generated, and the embedding property is reduced.
- Tend When the content ratio of the structural unit (I) exceeds the above upper limit, it is considered that the effect that the [A] polymer aggregates by crosslinking when the pressure-sensitive adhesive layer is irradiated with ultraviolet rays is reduced. There is a tendency to decrease. In addition, since the flexibility of the pressure-sensitive adhesive layer is lowered, the embedding property before ultraviolet irradiation tends to be lowered.
- the structural unit (II) is a structural unit derived from a (meth) acrylic acid alkyl ester containing an alkyl group having 4 to 10 carbon atoms.
- the said adhesive composition can raise the intensity
- alkyl group having 4 to 10 carbon atoms examples include an n-butyl group, an n-pentyl group, an n-hexyl group, an n-octyl group, a 2-ethylhexyl group, and an n-decyl group. Of these, n-butyl group and 2-ethylhexyl group are preferable.
- Monomers that give structural unit (II) include n-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, n-octyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.
- alkyl (meth) acrylates such as n-decyl (meth) acrylate.
- alkyl acrylate is preferable, and n-butyl acrylate and 2-ethylhexyl acrylate are more preferable.
- the lower limit of the content ratio of the structural unit (II) is preferably 5% by mass, more preferably 10% by mass, further preferably 30% by mass, and 40% by mass. Is particularly preferred.
- As an upper limit of the said content rate 95 mass% is preferable, 80 mass% is more preferable, 70 mass% is further more preferable, 60 mass% is especially preferable.
- the structural unit (III) is a structural unit containing a hydroxy group. [A] When the polymer has the structural unit (III), the adhesive force of the pressure-sensitive adhesive layer before ultraviolet irradiation is further improved and the water resistance is improved.
- hydroxy group examples include alcoholic hydroxy groups and phenolic hydroxy groups.
- an alcoholic hydroxy group is preferable from the viewpoint of further improving the adhesive strength before ultraviolet irradiation.
- Examples of monomers that give structural unit (III) include hydroxyalkyl (meth) acrylates such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, and hydroxybutyl (meth) acrylate; hydroxyphenyl (meth) acrylate and hydroxynaphthyl And hydroxyaryl (meth) acrylates such as (meth) acrylates.
- hydroxyalkyl (meth) acrylate is preferable, hydroxyalkyl acrylate is more preferable, and hydroxyethyl acrylate is more preferable.
- the lower limit of the content of the structural unit (III) is preferably 1% by mass, more preferably 3% by mass, further preferably 4% by mass, and 5% by mass. Is particularly preferred.
- As an upper limit of the said content rate 30 mass% is preferable, 25 mass% is more preferable, 15 mass% is further more preferable, and 10 mass% is especially preferable.
- the structural unit (IV) is a structural unit containing an epoxy group. [A] When the polymer has the structural unit (IV), the adhesive force of the pressure-sensitive adhesive layer before ultraviolet irradiation is further improved, and the adhesion to the substrate and the like is improved.
- Examples of the monomer that gives the structural unit (IV) include (meth) acrylates containing oxiranyl groups such as glycidyl (meth) acrylate, oxiranylethyl (meth) acrylate, and oxiranylpropyl (meth) acrylate; oxetanylmethyl (meth) ) Acrylate, oxetanylethyl (meth) acrylate, oxetanylpropyl (meth) acrylate and other (meth) acrylates containing an oxetanyl group.
- a (meth) acrylate containing an oxiranyl group is preferred, a methacrylate containing an oxiranyl group is more preferred, and glycidyl methacrylate is more preferred.
- the lower limit of the content ratio of the structural unit (IV) is preferably 0.1% by mass, more preferably 1% by mass, further preferably 2% by mass. Mass% is particularly preferred. As an upper limit of the said content rate, 30 mass% is preferable, 20 mass% is more preferable, 10 mass% is further more preferable, and 5 mass% is especially preferable.
- the polymer may have other structural units other than the structural units (I) to (IV).
- other structural units include structural units derived from styrene compounds.
- the styrene compound include styrene, ⁇ -methylstyrene, o-, m- or p-methylstyrene, o-, m- or p-hydroxystyrene.
- As an upper limit of the content rate of another structural unit 30 mass% is preferable with respect to all the structural units which comprise a [A] polymer, 20 mass% is more preferable, and 10 mass% is further more preferable.
- the lower limit of the reaction temperature in the polymerization is preferably 40 ° C, more preferably 60 ° C.
- 150 degreeC is preferable and 100 degreeC is more preferable.
- polymerization 1 hour is preferable and 4 hours is more preferable.
- the upper limit of the reaction time is preferably 48 hours, more preferably 24 hours.
- the lower limit of the reaction temperature for the introduction reaction of the double bond-containing group (A) is preferably 20 ° C, more preferably 30 ° C.
- 100 degreeC is preferable and 60 degreeC is more preferable.
- the upper limit of the reaction time is preferably 20 hours, and more preferably 8 hours.
- the lower limit of the weight average molecular weight (Mw) in terms of polystyrene by gel permeation chromatography (GPC) of the polymer is preferably 50,000, more preferably 100,000, even more preferably 150,000, and particularly preferably 200,000.
- Mw weight average molecular weight
- 500,000 is preferable
- 400,000 is more preferable
- 300,000 is more preferable
- 250,000 is particularly preferable.
- the said adhesive composition can make adhesive force before ultraviolet irradiation more fully high by making Mw of [A] polymer into the said range.
- the lower limit of the ratio (Mw / Mn) of Mw to the number average molecular weight (Mn) in terms of polystyrene by GPC of the polymer is usually 1 and preferably 1.1.
- As an upper limit of the ratio 5 is preferable, 3 is more preferable, 2 is more preferable, and 1.7 is particularly preferable.
- each condition of GPC used for measuring Mw and Mn of [A] polymer is as follows.
- GPC column For example, “TSKgel Multipore H XL- M” from Tosoh Corporation Column temperature: 40 ° C Elution solvent: Tetrahydrofuran (Wako Pure Chemical Industries) Flow rate: 1.0 mL / min Sample concentration: 0.05% by mass Sample injection volume: 100 ⁇ L Detector: Differential refractometer Standard material: Monodisperse polystyrene
- the lower limit of the glass transition temperature (Tg) of the polymer is preferably ⁇ 100 ° C., more preferably ⁇ 80 ° C., further preferably ⁇ 60 ° C., and particularly preferably ⁇ 40 ° C.
- the upper limit of Tg is preferably 20 ° C., more preferably 0 ° C., further preferably ⁇ 10 ° C., and particularly preferably ⁇ 20 ° C.
- the said adhesive composition can improve the adhesive force before ultraviolet irradiation more by making Tg of [A] polymer into the said range.
- the Tg of the [A] polymer in this specification is determined by increasing the dry film of the [A] polymer in a nitrogen atmosphere using a differential scanning calorimeter (for example, “MDSCQ200 type” manufactured by TA Instruments). It is a value measured under conditions of a temperature rate of 20 ° C./min and a sample amount of 20 mg.
- the photopolymerization initiator is a component capable of initiating a polymerization reaction by irradiation with ultraviolet rays.
- the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition contains [B] a photopolymerization initiator, so that the double bond-containing groups (A) possessed by the polymer [A] when irradiated with ultraviolet irradiation. It is cured by the polymerization reaction. As a result, the interaction between the pressure-sensitive adhesive layer and the adherend is reduced, and the adhesive strength is reduced.
- photopolymerization initiator for example, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenyl Acetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl ] -2-Morpholino-propan-1-one, 4- (2-hydroxyethoxy) phenyl-2- (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4′-die Aminobenzophenone, dichlorobenzophenone, 2-methylanthraquino
- photopolymerization initiators include, for example, “Irgacure 184”, “651”, “2959”, “127”, “819”, “784” and “754” of BASF. , “Same 500”, “Same 250”, “Same 270”, “Same 907”, “Same 369”, “Same 379EG”, “Same OXE 01”, “Same OXE 02”, “Lucirin TPO”, “Darocure” 1173 ",” same MBF ", and the like.
- the lower limit of the content of the photopolymerization initiator is preferably 0.1 parts by weight, more preferably 0.5 parts by weight, and even more preferably 1 part by weight with respect to 100 parts by weight of the polymer [A]. 2 parts by mass is particularly preferred. As an upper limit of the said content, 20 mass parts is preferable, 10 mass parts is more preferable, 8 mass parts is further more preferable, 6 mass parts is especially preferable. [B] By setting the content of the photopolymerization initiator in the above range, the polymerization reaction between the double bond-containing groups (A) by ultraviolet irradiation proceeds more effectively, and as a result, the adhesive strength after ultraviolet irradiation. Is further sufficiently large, and the adhesive residue is more sufficiently reduced.
- thermosetting agent is a component capable of forming a crosslinked structure in the [A] polymer by heating.
- the pressure-sensitive adhesive composition can form a pressure-sensitive adhesive layer having a crosslinked structure by further containing a [C] thermosetting agent in addition to the [A] polymer and the [B] photopolymerization initiator.
- the pressure-sensitive adhesive composition can suppress the protrusion of the pressure-sensitive adhesive layer when pressure is applied by forming a pressure-sensitive adhesive sheet and rolling it.
- thermosetting agent examples include polyfunctional isocyanate compounds and polyfunctional epoxy compounds.
- thermosetting agent examples include melamine compounds, urea compounds, metal salt compounds, metal chelate compounds, metal alkoxide compounds, aziridine compounds, amine compounds, amino resin compounds, peroxides, and the like can also be used.
- polyfunctional isocyanate compound examples include aliphatic diisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, 1,6-hexamethylene diisocyanate (HDI); cyclopentylene diisocyanate, cyclohexylene diisocyanate, and isophorone diisocyanate.
- aliphatic diisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, 1,6-hexamethylene diisocyanate (HDI); cyclopentylene diisocyanate, cyclohexylene diisocyanate, and isophorone diisocyanate.
- IPDI cycloaliphatic diisocyanates such as hydrogenated tolylene diisocyanate, hydrogenated xylylene diisocyanate; diisocyanate compounds such as aromatic diisocyanates such as tolylene diisocyanate (TDI), xylylene diisocyanate, diphenylmethane diisocyanate (MDI), and the above diisocyanates
- TDI tolylene diisocyanate
- MDI diphenylmethane diisocyanate
- a polyisocyanate compound which is a multimer of a dimer or more of the compound and the above polyisocyanate compound were modified. Such compounds, and the like.
- TDI tolylene diisocyanate
- MDI diphenylmethane diisocyanate
- polyfunctional epoxy compound examples include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, dibromo Neopentyl glycol diglycidyl ether, o-phthalic acid diglycidyl ester, glycerin polyglycidyl ether, trimethylolpropane polyglycidyl ether, diglycerol polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitol polyglycidyl ether, N, N, N ′ , N′-tetraglycidyl-m-xylylenediamine, N, N, N ′, N ′′, N '- penta glycidyl di
- the lower limit of the content of the thermosetting agent is preferably 0.05 parts by mass, more preferably 0.07 parts by mass, and even more preferably 0.1 parts by mass with respect to 100 parts by mass of the polymer [A]. 0.12 parts by mass is particularly preferable.
- the upper limit of the content is preferably 2 parts by mass, more preferably 1 part by mass, further preferably 0.5 parts by mass, and particularly preferably 0.3 parts by mass.
- the pressure-sensitive adhesive composition contains substantially no polyfunctional monomer or polyfunctional oligomer. Since the pressure-sensitive adhesive composition does not substantially contain a polyfunctional monomer or a polyfunctional oligomer, the curing of the pressure-sensitive adhesive layer generates a low molecular weight component that is considered to be caused by the polyfunctional monomer or the polyfunctional oligomer. It is thought that it can suppress, As a result, adhesive residue can fully be decreased.
- the polyfunctional monomer include dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, and the like.
- polyfunctional oligomer examples include bifunctional urethane acrylate, tetrafunctional urethane acrylate, hexafunctional urethane acrylate, epoxy acrylate, and methacrylates corresponding to these.
- “Substantially free of polyfunctional monomer or polyfunctional oligomer” means that the total content of the polyfunctional monomer and polyfunctional oligomer is, for example, 10 parts by mass or less, preferably 5 with respect to 100 parts by mass of the polymer [A]. It means that it is not more than part by mass, more preferably not more than 2 parts by mass, particularly preferably 0 part by mass.
- the pressure-sensitive adhesive composition includes, as an optional component, for example, an antioxidant, an anti-aging agent, an ultraviolet absorber, a light stabilizer, an antifoaming agent, a leveling agent, an antistatic agent, a surfactant, a storage stabilizer, and a thermal polymerization prohibition.
- an antioxidant for example, an antioxidant, an anti-aging agent, an ultraviolet absorber, a light stabilizer, an antifoaming agent, a leveling agent, an antistatic agent, a surfactant, a storage stabilizer, and a thermal polymerization prohibition.
- antioxidants examples include butylhydroxytoluene (BHT), butylhydroxyanisole (BHA), pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], thiodiethylenebis [ 3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and the like.
- antioxidants examples include “Irganox 1035”, “1010”, “1076”, “1135”, and “1520L” of BASF.
- antiaging agent examples include phenolic antiaging agent, allylamine antiaging agent, and ketone amine antiaging agent.
- commercially available anti-aging agents include, for example, “Antigen W”, “S”, “P”, “3C”, “6C”, “RD-G”, “FR” from Sumitomo Chemical Co., Ltd. , “Same AW” and the like.
- UV absorbers examples include benzotriazole UV absorbers and triazine UV absorbers.
- Commercially available UV absorbers include, for example, “TINUVIN P”, “234”, “320”, “326”, “327”, “328”, “213”, “ 400, Sumitomo Chemical's “Sumisorb 110”, “130”, “140”, “220”, “250”, “300”, “320”, “340”, “350” “, 400”, and the like.
- antifoaming agent examples include a silicone-based antifoaming agent, a fluorine atom-containing antifoaming agent, and an antifoaming agent containing an organic copolymer containing no silicon atom or fluorine atom.
- examples of commercially available antifoaming agents include silicone-based antifoaming agents such as “Same AC-901”, “Same AC-950”, “Same AC-1140”, “Same AO-3”, “ AO-4OH, Toray Dow Corning Silicone's “FS1265”, “SH200”, “SH5500”, “SC5540”, “SC5570”, “F-1”, “SD5590”, etc.
- DIC's “Megafac F-142D”, “F-144D”, “F-178K”, “F-179”, “F-815”, etc. are silicon atoms and fluorine atoms.
- an antifoaming agent containing an organic copolymer that does not contain any of the above Kyoeisha Chemical Co., Ltd. “Floren AC-202”, “AC-300”, “AC-303”, “AC-326F”, “AC -900 " "The AC-1190", and the like, "the AC-2000".
- leveling agent examples include “Polyflow No. 7”, “No. 38”, “No. 50”, “No. 75”, “No. 77”, and “No. 90” of Kyoeisha Chemical Co., Ltd. ”,“ No. 95 ”,“ No. 300 ”,“ No. 460 ”,“ ATF ”,“ KL-245 ”, and the like.
- adhesion-imparting agent examples include thiol compounds having an alkoxysilyl group and phosphate ester compounds. These compounds have the effect of improving the adhesion to the metal surface.
- Examples of the thiol compound having an alkoxysilyl group include mercaptoalkyl-mono, di- or tri-methoxysilane such as ⁇ -mercaptopropyltrimethoxysilane, ⁇ -mercaptopropylmethylmonomethoxysilane, and ⁇ -mercaptopropylmethyldimethoxysilane.
- mercaptoalkyl-mono, di- or tri-methoxysilane such as ⁇ -mercaptopropyltrimethoxysilane, ⁇ -mercaptopropylmethylmonomethoxysilane, and ⁇ -mercaptopropylmethyldimethoxysilane.
- Commercially available products include “SH6062” and “AY43-062” from Toray Dow Corning Silicone, “Syra Ace S810” from Chisso, “KBM803”, “KBM403” and “KBE5103” from Shin-Etsu Chemical Co., Ltd. Can be
- Examples of the phosphoric acid ester compound include mono [2- (meth) acryloyloxyethyl] phosphate, mono [2- (meth) acryloyloxyethyl] diphenyl phosphate, mono [2- (meth) acryloyloxypropyl] phosphate, bis [ 2- (meth) acryloyloxyethyl] phosphate, bis [2- (meth) acryloyloxypropyl] phosphate, tris [2- (meth) acryloyloxyethyl] phosphate, and the like.
- Examples of commercially available products include “Light Ester P-1M”, “P-2M”, “Light Acrylate P-1A” and “P-2A” manufactured by Kyoeisha Chemical Co., Ltd., “KAYAMER PM-2” manufactured by Nippon Kayaku Co., Ltd. And “PM-21”.
- tackifier examples include alicyclic saturated hydrocarbon resin, rosin ester series, terpene phenol series, C5 or C9 petroleum resin, and the like.
- commercially available products include “Arcon P-70”, “P-90”, “P-100”, “M-90”, “M-100”, “M-M” of Arakawa Chemical Industries, Ltd. 135 ”,“ Alastor 700 ”,“ Same KE-359 ”,“ Tamanol 521 ”,“ Superester A-75 ”,“ Same A-115 ”and the like.
- the solvent examples include aromatic solvents such as toluene and xylene; Ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, 2-methyl-5-hexanone; Ester solvents such as ethyl acetate and butyl acetate; Halogen solvents such as methyl chloride, dichloromethane, dichloroethane; Glycol ether solvents such as ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol mono n-propyl ether, propylene glycol; Examples include glycol ether carboxylate solvents such as propylene glycol monomethyl ether acetate.
- aromatic solvents such as toluene and xylene
- Ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, 2-methyl-5-hexanone
- Ester solvents such as e
- the amount of the optional component used can be appropriately selected within a range that does not impair the effect of the pressure-sensitive adhesive composition of the present invention.
- the lower limit of the viscosity at 25 ° C. of the pressure-sensitive adhesive composition is preferably 100 mPa ⁇ s, more preferably 200 mPa ⁇ s, further preferably 300 mPa ⁇ s, and particularly preferably 400 mPa ⁇ s.
- the upper limit of the viscosity is preferably 5,000 mPa ⁇ s, more preferably 3,000 mPa ⁇ s, further preferably 1,500 mPa ⁇ s, and particularly preferably 1,000 mPa ⁇ s.
- the pressure-sensitive adhesive composition can be prepared, for example, by mixing [A] polymer, [B] photopolymerization initiator, [C] thermosetting agent and optional components contained as necessary at a predetermined ratio. it can.
- the pressure-sensitive adhesive sheet of the present invention includes a sheet-like base material and a pressure-sensitive adhesive layer laminated on one surface of the base material, and the pressure-sensitive adhesive layer is formed from the pressure-sensitive adhesive composition. Since the pressure-sensitive adhesive sheet is provided with a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition described above, the pressure-sensitive adhesive force before ultraviolet irradiation is sufficiently high, the decrease in the pressure-sensitive adhesive force due to ultraviolet irradiation is sufficiently large, and the adhesive residue is removed. It can be sufficiently reduced and has excellent embeddability. Therefore, the said adhesive sheet can be adhere
- the pressure-sensitive adhesive sheet is, for example, a dicing tape for fixing a semiconductor wafer to a frame or the like when performing a dicing process of a semiconductor wafer, or a temporary fixing tape for temporarily fixing circuit elements or the like in a manufacturing process of an electronic component or the like.
- it can be suitably used as a transport tape used when transporting circuit elements or the like in a semiconductor wafer manufacturing process.
- the pressure-sensitive adhesive sheet can also be used as a film with a metal foil used in the production of a multilayer wiring board or a transfer sheet for circuit formation.
- the material of the sheet-like base material is not particularly limited, and examples thereof include synthetic resin, glass, metal, and ceramics.
- As a minimum of the average thickness of a sheet-like base material 10 micrometers is preferred, 20 micrometers is more preferred, and 25 micrometers is still more preferred.
- the upper limit of the average thickness is preferably 300 ⁇ m, more preferably 250 ⁇ m, and even more preferably 200 ⁇ m.
- the pressure-sensitive adhesive layer is formed from the above-mentioned pressure-sensitive adhesive composition, the pressure-sensitive adhesive layer is effectively cured by irradiation with ultraviolet rays, and its adhesive strength is greatly reduced.
- As a minimum of average thickness of an adhesive layer 5 micrometers is preferred, 10 micrometers is more preferred, 20 micrometers is still more preferred, and 30 micrometers is especially preferred.
- the upper limit of the average thickness is preferably 1,000 ⁇ m, more preferably 500 ⁇ m, still more preferably 100 ⁇ m, and particularly preferably 50 ⁇ m.
- the said adhesive sheet can be manufactured as follows, for example. First, the pressure-sensitive adhesive composition is applied onto at least one surface of a sheet-like base material by a coating apparatus such as an applicator. Next, the said adhesive sheet can be obtained by drying the said coating film.
- the pressure-sensitive adhesive sheet When the pressure-sensitive adhesive sheet is peeled from the adherend, the pressure-sensitive adhesive sheet can be peeled easily and without adhesive residue by irradiating the pressure-sensitive adhesive sheet with ultraviolet rays to cure the pressure-sensitive adhesive layer.
- the cumulative amount of ultraviolet light for curing the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet can be appropriately selected depending on the average thickness of the pressure-sensitive adhesive layer on the surface of the substrate, and the lower limit of this cumulative light amount is 10 mJ / cm 2. Is preferable, and 20 mJ / cm 2 is preferable.
- the upper limit of the integrated light quantity is preferably 4,000 mJ / cm 2, more preferably 2,000 mJ / cm 2, more preferably 1,000 mJ / cm 2.
- the light source include a high-pressure mercury lamp, a low-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, an arc lamp, and a gallium lamp.
- Mw of the polymer is 2 GPC columns (“TSKgel Multipore H XL- M”) manufactured by Tosoh Corporation, flow rate: 1.0 mL / min, elution solvent: tetrahydrofuran, sample concentration: 0.05% by mass, Sample injection volume: 100 ⁇ L, column temperature: 40 ° C., detector: measured by GPC using monodisperse polystyrene as a standard under the analysis conditions of a differential refractometer.
- Tg [A] A solution containing the polymer was thinly stretched on a glass plate and dried at 25 ° C. for 7 days to obtain a dry film. Using a differential scanning calorimeter (“TSC Instruments” “MDSCQ200 type”), the resulting dried film was subjected to a temperature increase rate of 20 ° C./min and a sample amount of 20 mg under the conditions of [A The Tg (° C.) of the polymer was measured.
- TSC Instruments “MDSCQ200 type”
- the hydroxyl group in the precursor polymer (a-1) reacts with the isocyanate group in the MOI to obtain a polymer (A-1) having a methacryloyl group as a double bond-containing group (A) in the side chain. It was. Mw of this polymer (A-1) was 206,000, Tg was ⁇ 25.1 ° C., and the content of the double bond-containing group (A) was 1.0% by mass.
- thermosetting agent C-1 Coronate L (Tosoh Corporation)
- Example 1 [A] 100 parts by mass of (A-1) as a polymer, [B] 4 parts by mass of (B-1) as a photopolymerization initiator, [C] 0.15 parts by mass of (C-1) as a thermosetting agent
- a pressure-sensitive adhesive composition (T-1) was prepared by mixing 0.3 parts by weight of (E-1) as an antioxidant and an antioxidant.
- Adhesive compositions (T-2) to (T-9) and (CT-1) to (CT) were obtained in the same manner as in Example 1 except that the components having the types and contents shown in Table 2 below were used. -3) was prepared. “-” In Table 2 indicates that the corresponding component was not used.
- the adhesive sheet was produced according to the following method, and it evaluated by implementing the following tests about this adhesive sheet.
- the prepared adhesive sheet was bonded to an adherend made of SUS304 (Engineering Test Service Co., Ltd.) to create a test piece, and the test piece was subjected to a 180 ° peel test method in accordance with JIS-Z0237: 2009.
- the peel strength (unit: N / 25 mm) was measured under the conditions of an atmospheric temperature of 23 ° C. and a peeling rate of 300 mm / min.
- the UV pre-adhesive strength can be evaluated as “good” when it is 10 N / 25 mm or more and “bad” when it is less than 10 N / 25 mm for an SUS304 adherend.
- the test piece prepared in the above “UV pre-adhesive strength” section was (1) heat-treated at 23 ° C. for 0.5 hour, or (2) 100 ° C. for 1 hour, and then subjected to high pressure from the substrate side of the adhesive sheet.
- the pressure-sensitive adhesive layer was cured by irradiating with an ultraviolet ray with an accumulated light amount of 500 mJ / cm 2 using a mercury lamp (“Igrand Stage ECS-410GX” manufactured by Eye Graphics). In this case, the pressure-sensitive adhesive layer is irradiated with ultraviolet rays that have passed through the substrate.
- peel strength was measured under the conditions of an atmosphere of 23 ° C. and a peeling rate of 300 mm / min by a 180 ° peel test method in accordance with JIS-Z0237: 2009.
- the post-UV adhesive strength is “good” in the case of 1.5 N / 25 mm or less in both (1) and (2) with respect to the adherend made of SUS304, and at least one of (1) and (2) On the other hand, when it exceeds 1.5 N / 25 mm, it can be evaluated as “bad”.
- the embedding property was evaluated as follows. On the glass plate, a PET film having an average thickness of 25 ⁇ m cut into a width of 10 mm was closely adhered to form a step. Next, a pressure-sensitive adhesive sheet formed by applying a pressure-sensitive adhesive composition on a PET film (“A4300” manufactured by Toyobo Co., Ltd., average thickness 50 ⁇ m) so that the average thickness after drying is 50 ⁇ m is formed in the region including the steps. After placing, the 2 kg roller was reciprocated once and bonded together by pressing. Subsequently, it was allowed to stand at room temperature for 10 minutes, and the presence or absence of floating or bubbles around the step was observed to evaluate the embedding property. The embedding property was evaluated as “A” (good) when no floating or bubbles were observed, and “B” (bad) when floating or bubbles were observed.
- the pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet of the present invention regardless of the presence or absence of heating, the pressure-sensitive adhesive force before UV irradiation is sufficiently high, the amount of decrease in the pressure-sensitive adhesive strength by UV irradiation is sufficiently large, and the adhesive residue is sufficient Moreover, the pressure-sensitive adhesive layer to be formed is excellent in embeddability and can be suitably used for an adherend having a step or the like. Moreover, even when heated in a bonded state, it can be peeled off without any adhesive residue by ultraviolet irradiation. Therefore, the said adhesive composition and adhesive sheet can be used suitably in various manufacturing processes, such as the dicing process of the semiconductor wafer which has a heating process.
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Abstract
Description
当該粘着剤組成物は、[A]ポリマーと、[B]光重合開始剤と、[C]熱硬化剤とを含有する。また、当該粘着剤組成物は、多官能モノマー又は多官能オリゴマーを実質的に含有しない。当該粘着剤組成物は、[A]~[C]成分以外の任意成分を含有していてもよい。
[A]ポリマーは、構造単位(I)及び二重結合含有基(A)を有するポリマーである。[A]ポリマーは、構造単位(I)以外に、炭素数4以上10以下のアルキル基を含む(メタ)アクリル酸アルキルエステルに由来する構造単位(以下、「構造単位(II)」ともいう)、ヒドロキシ基を含む構造単位(以下、「構造単位(III)」ともいう)及び/又はエポキシ基を含む構造単位(以下、「構造単位(IV)」ともいう)をさらに有することが好ましく、構造単位(I)~(IV)以外のその他の構造単位をさらに有していてもよい。二重結合含有基(A)は、構造単位(II)~(IV)やその他の構造単位に含まれていてもよい。以下、二重結合含有基(A)及び各構造単位について説明する。
二重結合含有基(A)は、重合性炭素-炭素二重結合を含む基である。重合性炭素-炭素二重結合は、エチレン性炭素-炭素二重結合を意味する。
構造単位(I)は、アクリル酸メチルに由来する構造単位である。構造単位(I)は、-CH2-CH(COOCH3)-で表される構造を有している。
構造単位(II)は、炭素数4以上10以下のアルキル基を含む(メタ)アクリル酸アルキルエステルに由来する構造単位である。当該粘着剤組成物は、[A]ポリマーが構造単位(II)を有することで、粘着剤層の強度をより高めることができ、その結果、紫外線照射前の粘着力をより高めることができる。
構造単位(III)は、ヒドロキシ基を含む構造単位である。[A]ポリマーが構造単位(III)を有することで、紫外線照射前における粘着剤層の粘着力がより向上すると共に、耐水性が向上する。
構造単位(IV)は、エポキシ基を含む構造単位である。[A]ポリマーが構造単位(IV)を有することで、紫外線照射前の粘着剤層の粘着力がより向上すると共に、基材等に対する密着性が向上する。
[A]ポリマーは、構造単位(I)~(IV)以外のその他の構造単位を有していてもよい。その他の構造単位としては、例えばスチレン化合物に由来する構造単位等が挙げられる。スチレン化合物としては、例えば、スチレン、α-メチルスチレン、o-、m-又はp-メチルスチレン、o-、m-又はp-ヒドロキシスチレン等が挙げられる。その他の構造単位の含有割合の上限としては、[A]ポリマーを構成する全構造単位に対して、30質量%が好ましく、20質量%がより好ましく、10質量%がさらに好ましい。
[A]ポリマーの合成方法では、例えば構造単位(I)~(IV)及びその他の構造単位を与える単量体を、アゾビスイソブチロニトリル(AIBN)等のラジカル重合開始剤などを用い、酢酸エチル等の溶媒中で重合することにより前駆体ポリマーを得る。次に、この前駆体ポリマーのヒドロキシ基、エポキシ基等に、二重結合含有基(A)とイソシアネート基、カルボキシ基等とを有する化合物を、ジブチルスズジラウレート等の反応触媒の存在下、酢酸エチル等の溶媒中で反応させる。これにより、前駆体ポリマーに二重結合含有基(A)を導入されるため、[A]ポリマーを合成することができる。
GPCカラム:例えば東ソー社の「TSKgel Multipore HXL-M」2本、
カラム温度:40℃
溶出溶媒:テトラヒドロフラン(和光純薬工業社)
流量: 1.0mL/分
試料濃度: 0.05質量%
試料注入量:100μL
検出器:示差屈折計
標準物質:単分散ポリスチレン
[B]光重合開始剤は、紫外線の照射によって重合反応を開始することができる成分である。当該粘着剤組成物から形成される粘着剤層は、[B]光重合開始剤を含まれることで、紫外線照射を照射された際に[A]ポリマーが有する二重結合含有基(A)同士の重合反応で硬化する。その結果、粘着剤層と被着体との相互作用が低減し、粘着力が低下する。
[C]熱硬化剤は、加熱によって[A]ポリマーに架橋構造を形成することができる成分である。当該粘着剤組成物は、[A]ポリマー及び[B]光重合開始剤に加えてさらに[C]熱硬化剤を含有することで、架橋構造を有する粘着剤層を形成できる。その結果、当該粘着剤組成物は、粘着シートを形成してロール化することで圧力がかかった際の粘着剤層のはみ出しを抑制できる。
当該粘着剤組成物は、任意成分として、例えば酸化防止剤、老化防止剤、紫外線吸収剤、光安定剤、消泡剤、レベリング剤、帯電防止剤、界面活性剤、保存安定剤、熱重合禁止剤、可塑剤、濡れ性改良剤、密着性付与剤、粘着付与剤(タッキーファイヤー)、溶媒等が挙げられる。
トルエン、キシレン等の芳香族系溶媒;
アセトン、メチルエチルケトン、メチルイソブチルケトン、2-メチル-5-ヘキサノン等のケトン系溶媒;
酢酸エチル、酢酸ブチル等のエステル系溶媒;
塩化メチル、ジクロロメタン、ジクロロエタン等のハロゲン系溶媒;
エチレングリコールモノエチルエーテル、プロピレングリコールモノメチルエーテル、プロピレングリコールモノn-プロピルエーテル、プロピレングリコール等のグリコールエーテル系溶媒;
プロピレングリコールモノメチルエーテルアセテート等のグリコールエーテルカルボキシレート系溶媒などが挙げられる。
当該粘着剤組成物は、例えば[A]ポリマー、[B]光重合開始剤、[C]熱硬化剤及び必要に応じて含有される任意成分を所定の割合で混合することにより調製することができる。
本発明の粘着シートは、シート状の基材と、上記基材の一方の面に積層される粘着剤層とを備え、上記粘着剤層が、当該粘着剤組成物から形成されている。当該粘着シートは、上述した当該粘着剤組成物から形成された粘着剤層を備えるので、紫外線照射前の粘着力が十分に高く、紫外線照射による粘着力の低下幅が十分に大きく、糊残りを十分に低減することができ、かつ埋め込み性にも優れる。従って、当該粘着シートは、種々の被着体に対して高い粘着力で接着させることができ、かつ被着体から容易に剥離することができる。「シート」とは、シート状のものを意味し、例えば、テープやフィルムも含む概念である。
当該粘着シートは、例えば以下のようにして製造することができる。まず、シート状の基材の少なくとも一方の面上に、アプリケーター等の塗工装置により、当該粘着剤組成物を塗工する。次に、上記塗膜を乾燥させることにより、当該粘着シートを得ることができる。
当該粘着シートを被着体から剥離する場合、当該粘着シートに紫外線を照射して粘着剤層を硬化させることで容易かつ糊残りなく剥離できる。当該粘着シートの粘着剤層を硬化させる際の紫外線の積算光量は、基材表面の粘着剤層の平均厚み等により適宜選択することができるが、この積算光量の下限としては、10mJ/cm2が好ましく、20mJ/cm2が好ましい。上記積算光量の上限としては、4,000mJ/cm2が好ましく、2,000mJ/cm2がより好ましく、1,000mJ/cm2がさらに好ましい。紫外線の積算光量を上記範囲とすることで、粘着剤層がより効果的に硬化するため、粘着力をより十分に低下させることができる。光源としては、例えば高圧水銀ランプ、低圧水銀ランプ、超高圧水銀ランプ、メタルハライドランプ、アーク灯、ガリウムランプ等が挙げられる。
[A]ポリマーのMwは、東ソー社のGPCカラム(「TSKgel Multipore HXL-M」)2本を用い、流量:1.0mL/分、溶出溶媒:テトラヒドロフラン、試料濃度:0.05質量%、試料注入量:100μL、カラム温度:40℃、検出器:示差屈折計の分析条件で、単分散ポリスチレンを標準とするGPCにより測定した。
[A]ポリマーを含む溶液をガラス板の上に薄く引き伸ばし、25℃で7日間乾燥させて乾燥フィルムを得た。得られた乾燥フィルムを示差走査熱量分析計(ティー・エイ・インスツルメント社の「MDSCQ200型」)を用い、窒素雰囲気下、昇温速度20℃/分、サンプル量20mgの条件で、[A]ポリマーのTg(℃)を測定した。
[A]ポリマー中の二重結合含有基(A)の含有率(質量%)は、核磁気共鳴装置(Bruker社の「ASCEND400」)を使用し、測定溶媒として重クロロホルムを用いて13C-NMRを測定することにより、[A]ポリマーにおける二重結合含有基(A)を含む構造単位及びそれ以外の構造単位の各構造単位についてその構造と各含有割合とを求め、これらの測定結果から算出した。
[A]ポリマーの合成に用いた各単量体について以下に示す。
MA:メチルアクリレート(東亞合成社)
BA:ブチルアクリレート(和光純薬工業社)
2EHA:2-エチルヘキシルアクリレート(東亞合成社)
HEA:2-ヒドロキシエチルアクリレート(大阪有機化学工業社)
GMA:グリシジルメタクリレート(三菱レイヨン社)
MMA:メチルメタクリレート(三菱レイヨン社)
4口フラスコに、単量体としてのMA40.0質量部、2EHA53.0質量部及びHEA7.0質量部、ラジカル重合開始剤としてのAIBN2質量部並びに溶媒としての酢酸エチル150質量部を仕込み、窒素雰囲気下、70℃で8時間反応させ、さらに80℃で1時間反応させることにより、前駆体ポリマー(a-1)を含む溶液を得た。次に、冷却器及び温度計を備えた4口丸底フラスコに、この前駆体ポリマー(a-1)100質量部(樹脂固形分換算)を含む溶液及び反応触媒としてのジブチルスズジラウレート0.01質量部を仕込み、撹拌しながら40℃に加熱した。次いで、2-メタクリロイルオキシエチルイソシアネート(昭和電工社の「カレンズMOI」、以下、「MOI」ともいう)2.4質量部を加え、40℃で5時間反応を行った。これにより、前駆体ポリマー(a-1)中の水酸基とMOI中のイソシアネート基とが反応し、側鎖に二重結合含有基(A)としてのメタクリロイル基を有するポリマー(A-1)を得た。このポリマー(A-1)のMwは20.6万、Tgは-25.1℃、二重結合含有基(A)の含有率は1.0質量%であった。
表1に示す種類及び使用量の単量体及び二重結合含有基導入化合物を用いた以外は、合成例1と同様にして、ポリマー(A-2)~(A-9)並びに(CA-1)及び(CA-2)を合成した。二重結合含有基導入化合物である「AA」は、アクリル酸(大阪有機化学工業社)を示す。合成したポリマーの二重結合含有基(A)の含有率(質量%)、Mw及びTgについて表1に合わせて示す。
粘着剤組成物の調製に用いた[A]ポリマー以外の成分について以下に示す。
B-1:1-ヒドロキシ-シクロヘキシルフェニルケトン(BASF社の「Irgacure184」)
C-1:コロネートL(東ソー社)
D-1:ジペンタエリスリトールヘキサアクリレート(日本化薬社の「KAYARAD DPHA」)
E-1:Irganox1035(BASF社)
[A]ポリマーとしての(A-1)100質量部、[B]光重合開始剤としての(B-1)4質量部、[C]熱硬化剤としての(C-1)0.15質量部及び酸化防止剤としての(E-1)0.3質量部を混合することにより、粘着剤組成物(T-1)を調製した。
下記表2に示す種類及び含有量の各成分を用いた以外は、実施例1と同様にして、粘着剤組成物(T-2)~(T-9)及び(CT-1)~(CT-3)を調製した。表2中の「-」は、該当する成分を用いなかったことを示す。
上記調製した粘着剤組成物について、下記方法に従って粘着シートを作製し、この粘着シートについて、以下の試験を実施することにより評価した。
上記調製した粘着剤組成物をそのまま塗工液として用い、シート状の基材としてのポリエチレンテレフタレート(PET)フィルム(東洋紡社の「コスモシャイン4300」、平均厚み100μm)の表面にアプリケーターを用いて塗布し、次いで、100℃で3分間乾燥させることにより、基材の表面に平均厚み25μmの粘着剤層が積層された粘着シートを得た。
上記作製した粘着シートを、SUS304製の被着体(エンジニアリングテストサービス社)に貼りあわせて試験片を作成した後、この試験片について、JIS-Z0237:2009に準拠する180°ピール試験法によって、雰囲気温度23℃、剥離速度300mm/分の条件でピール強度(単位:N/25mm)を測定した。
上記「UV前粘着力」の項で作製した試験片を、(1)23℃で0.5時間、又は(2)100℃で1時間加熱処理し、次いで、粘着シートの基材側から高圧水銀ランプ(アイグラフィックス社の「アイグランステージECS-410GX」)による積算光量500mJ/cm2の紫外線照射を行い、粘着剤層を硬化させた。この場合、基材を透過した紫外線が粘着剤層に照射される。次いで、JIS-Z0237:2009に準拠する180°ピール試験法によって、雰囲気23℃、剥離速度300mm/分の条件でピール強度を測定した。
上記[UV後粘着力]の(2)100℃で1時間加熱処理した場合において、紫外線照射後に粘着シートを被着体から剥がした後、被着体の表面における「糊残り」の状態を光学顕微鏡で測定した。具体的には、被着体の表面に最大長さが1μm以上の異物(粘着剤層の一部)が認められなかった場合は「A」(良好)と、1μm以上の異物が認められた場合は「B」(不良)と評価した。
埋め込み性は、以下のようにして評価した。ガラス板の上に、平均厚み25μmのPETフィルムを10mm幅にカットしたものを密着させ、段差を形成した。次に、乾燥後の平均厚みが50μmになるようにPETフィルム(東洋紡社の「A4300」、平均厚み50μm)上に粘着剤組成物を塗布して形成した粘着シートを、上記段差を含む領域に置いた後、その上で2kgローラーを1往復させ圧接することにより貼り合わせた。次いで、10分間常温で静置し、上記段差周辺の浮きや気泡等の有無を観察し、埋め込み性を評価した。埋め込み性は、浮きや気泡が認められない場合は「A」(良好)と、浮きや気泡が認められた場合は「B」(不良)と評価した。
Claims (5)
- アクリル酸メチルに由来する構造単位及び重合性炭素-炭素二重結合含有基を有するポリマーと、
光重合開始剤と、
熱硬化剤と
を含有し、
上記ポリマーを構成する全構造単位に対する上記構造単位の含有割合が1質量%以上60質量%以下であり、
多官能モノマー又は多官能オリゴマーを実質的に含有しない粘着剤組成物。 - 上記ポリマーが上記重合性炭素-炭素二重結合含有基を側鎖に有する請求項1に記載の粘着剤組成物。
- 上記重合性炭素-炭素二重結合含有基が(メタ)アクリロイル基である請求項2に記載の粘着剤組成物。
- 上記ポリマーが、炭素数4以上10以下のアルキル基を含む(メタ)アクリル酸アルキルエステルに由来する構造単位をさらに有する請求項1、請求項2又は請求項3に記載の粘着剤組成物。
- シート状の基材と、
上記基材の一方の面に積層される粘着剤層と
を備え、
上記粘着剤層が、請求項1から請求項4のいずれか1項に記載の粘着剤組成物から形成される粘着シート。
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| CN201780010053.3A CN108603086A (zh) | 2016-02-29 | 2017-01-19 | 粘着剂组合物及粘着片 |
| KR1020187024840A KR20180111878A (ko) | 2016-02-29 | 2017-01-19 | 점착제 조성물 및 점착 시트 |
| JP2018502572A JPWO2017149981A1 (ja) | 2016-02-29 | 2017-01-19 | 粘着剤組成物及び粘着シート |
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| WO (1) | WO2017149981A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020063328A (ja) * | 2018-10-15 | 2020-04-23 | 大日本印刷株式会社 | ブロック共重合体、表面調整剤、粘着組成物、粘着シート、粘着保護シート、積層体、光学部材及び電子部材 |
| JP2020200388A (ja) * | 2019-06-10 | 2020-12-17 | リンテック株式会社 | 粘着シートおよび積層体 |
| WO2021131735A1 (ja) * | 2019-12-27 | 2021-07-01 | 日東電工株式会社 | 粘着シート |
| WO2021131517A1 (ja) * | 2019-12-27 | 2021-07-01 | 日東電工株式会社 | 粘着シート |
| JP2021155690A (ja) * | 2019-12-27 | 2021-10-07 | 日東電工株式会社 | 粘着シート |
| EP3922692A4 (en) * | 2019-02-06 | 2022-11-09 | Nitto Denko Corporation | PRESSURE SENSITIVE ADHESIVE FILM |
| US11842916B2 (en) | 2018-06-26 | 2023-12-12 | Lintec Corporation | Semiconductor processing adhesive tape and method of manufacturing semiconductor device |
| EP4242279A4 (en) * | 2020-11-09 | 2024-06-19 | Denka Company Limited | PRESSURE-SENSITIVE ADHESIVE TAPE AND PROCESSING METHODS |
| CN119391323A (zh) * | 2024-12-02 | 2025-02-07 | 佛山印艺印务有限公司 | 一种强粘耐久的不干胶及其制备方法 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI798394B (zh) * | 2018-03-26 | 2023-04-11 | 日商琳得科股份有限公司 | 黏著劑組合物、黏著片及加工物的製造方法 |
| US20230407149A1 (en) * | 2020-11-09 | 2023-12-21 | Denka Company Limited | Adhesive tape and processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261035A (ja) * | 2006-03-28 | 2007-10-11 | Lintec Corp | チップ用保護膜形成用シート |
| WO2014030699A1 (ja) * | 2012-08-23 | 2014-02-27 | リンテック株式会社 | 保護膜形成層付ダイシングシートおよびチップの製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3410371B2 (ja) * | 1998-08-18 | 2003-05-26 | リンテック株式会社 | ウエハ裏面研削時の表面保護シートおよびその利用方法 |
| JP5687897B2 (ja) * | 2010-12-28 | 2015-03-25 | 日東電工株式会社 | 放射線硬化型粘着剤組成物及び粘着シート |
| JP5781302B2 (ja) * | 2010-12-28 | 2015-09-16 | 日東電工株式会社 | 放射線硬化型粘着剤組成物及び粘着シート |
-
2017
- 2017-01-19 JP JP2018502572A patent/JPWO2017149981A1/ja active Pending
- 2017-01-19 WO PCT/JP2017/001818 patent/WO2017149981A1/ja not_active Ceased
- 2017-01-19 KR KR1020187024840A patent/KR20180111878A/ko not_active Withdrawn
- 2017-01-19 CN CN201780010053.3A patent/CN108603086A/zh active Pending
- 2017-02-10 TW TW106104399A patent/TW201800522A/zh unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261035A (ja) * | 2006-03-28 | 2007-10-11 | Lintec Corp | チップ用保護膜形成用シート |
| WO2014030699A1 (ja) * | 2012-08-23 | 2014-02-27 | リンテック株式会社 | 保護膜形成層付ダイシングシートおよびチップの製造方法 |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11842916B2 (en) | 2018-06-26 | 2023-12-12 | Lintec Corporation | Semiconductor processing adhesive tape and method of manufacturing semiconductor device |
| JP2020063328A (ja) * | 2018-10-15 | 2020-04-23 | 大日本印刷株式会社 | ブロック共重合体、表面調整剤、粘着組成物、粘着シート、粘着保護シート、積層体、光学部材及び電子部材 |
| JP7215061B2 (ja) | 2018-10-15 | 2023-01-31 | 大日本印刷株式会社 | ブロック共重合体、表面調整剤、粘着組成物、粘着シート、粘着保護シート、積層体、光学部材及び電子部材 |
| EP3922692A4 (en) * | 2019-02-06 | 2022-11-09 | Nitto Denko Corporation | PRESSURE SENSITIVE ADHESIVE FILM |
| JP7378230B2 (ja) | 2019-06-10 | 2023-11-13 | リンテック株式会社 | 粘着シートおよび積層体 |
| JP2020200388A (ja) * | 2019-06-10 | 2020-12-17 | リンテック株式会社 | 粘着シートおよび積層体 |
| JPWO2021131517A1 (ja) * | 2019-12-27 | 2021-07-01 | ||
| JP2021155690A (ja) * | 2019-12-27 | 2021-10-07 | 日東電工株式会社 | 粘着シート |
| WO2021131517A1 (ja) * | 2019-12-27 | 2021-07-01 | 日東電工株式会社 | 粘着シート |
| WO2021131735A1 (ja) * | 2019-12-27 | 2021-07-01 | 日東電工株式会社 | 粘着シート |
| JP7566490B2 (ja) | 2019-12-27 | 2024-10-15 | 日東電工株式会社 | 粘着シート |
| JP7742306B2 (ja) | 2019-12-27 | 2025-09-19 | 日東電工株式会社 | 粘着シート |
| EP4242279A4 (en) * | 2020-11-09 | 2024-06-19 | Denka Company Limited | PRESSURE-SENSITIVE ADHESIVE TAPE AND PROCESSING METHODS |
| CN119391323A (zh) * | 2024-12-02 | 2025-02-07 | 佛山印艺印务有限公司 | 一种强粘耐久的不干胶及其制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017149981A1 (ja) | 2018-12-20 |
| CN108603086A (zh) | 2018-09-28 |
| TW201800522A (zh) | 2018-01-01 |
| KR20180111878A (ko) | 2018-10-11 |
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