WO2015198921A1 - 光硬化性組成物、及びそれを含む光学素子用接着剤 - Google Patents
光硬化性組成物、及びそれを含む光学素子用接着剤 Download PDFInfo
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- WO2015198921A1 WO2015198921A1 PCT/JP2015/067333 JP2015067333W WO2015198921A1 WO 2015198921 A1 WO2015198921 A1 WO 2015198921A1 JP 2015067333 W JP2015067333 W JP 2015067333W WO 2015198921 A1 WO2015198921 A1 WO 2015198921A1
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- 0 *C12NC1(*)C(*)(*)C(*)(*C1(*)C(*)(*)C(*)(*)C3(*)OC3(*)C1(*)*)C(*)(*)C2(*)* Chemical compound *C12NC1(*)C(*)(*)C(*)(*C1(*)C(*)(*)C(*)(*)C3(*)OC3(*)C1(*)*)C(*)(*)C2(*)* 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1525—Four-membered rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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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
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
Definitions
- the present invention relates to a photocurable composition and an adhesive for optical elements containing the same.
- This application claims the priority of Japanese Patent Application No. 2014-127872 for which it applied to Japan on June 23, 2014, and uses the content here.
- the imaging unit is generally composed of a solid-state imaging device (CCD type image sensor, CMOS type image sensor, etc.) and optical components such as a lens. ing. A plurality of lenses are used in a state where they are fixed with an adhesive for the purpose of improving the resolution.
- the cationic curable composition is preferably used because it does not inhibit the curing by oxygen and the shrinkage at the time of curing is smaller than that of the radical polymerizable composition.
- the compositions described in Patent Documents 1 to 3 are known.
- these compositions have a problem that sufficient curability cannot be obtained by UV-LED irradiation.
- the UV-LED is preferably used because it can be turned on / off quickly, has high efficiency and long life, does not generate harmful ozone, and does not use mercury as an environmentally hazardous substance. .
- the heat resistance of the obtained cured product is insufficient, and when the substrate is mounted by reflow soldering using lead-free solder, there is a problem that the lens is peeled off or displaced.
- the shape stability after application is low, it is difficult to control the discharge amount and the wet spread range using a discharge device such as a jet dispenser, and the adhesive adheres to the lens part and the optical characteristics deteriorate. It was also a problem to do.
- the object of the present invention is to control the discharge amount and the wet spreading range by using a discharge device or the like, and exhibit excellent curability by UV-LED irradiation, thereby improving the solder reflow heat resistance. It is providing the photocurable composition which can form the outstanding hardened
- a photocurability containing a specific compound having an alicyclic epoxy group, an oxetane compound, a specific photocationic polymerization initiator, and an inorganic filler can be discharged with good control using a discharge device such as a jet dispenser, and exhibits excellent curability when irradiated with UV-LED, thereby forming a cured product with excellent reflow heat resistance. I found what I could do.
- the “alicyclic epoxy group” means a group in which two adjacent carbon atoms constituting an alicyclic ring form a ring together with one oxygen atom (particularly, adjacent cyclohexane ring constituting a cyclohexane ring).
- this invention provides the photocurable composition containing the following component (A), a component (B), a component (C), and a component (D).
- the present invention also provides the photocurable composition, wherein the component (A) is a compound represented by the following formula (a).
- the component (A) is a compound represented by the following formula (a).
- R 1 to R 18 are the same or different and each represents a hydrogen atom, a halogen atom, an oxygen atom, a hydrocarbon group that may contain a halogen atom, or an alkoxy group that may have a substituent.
- X represents a single bond or a linking group (excluding a linking group containing an ester bond)]
- the present invention also provides the photocurable composition described above, wherein the content of component (B) is 5 to 40% by weight of the total cationically polymerizable compound contained in the photocurable composition.
- the present invention also provides the photocurable composition as described above, wherein the content of component (A) is 20 to 60% by weight of the total cationically polymerizable compound contained in the photocurable composition.
- the present invention also provides the photocurable composition described above, wherein the content of component (D) is 1 to 10% by weight of the total amount of the photocurable composition.
- the anion moiety of the photocationic polymerization initiator of the component (C) is represented by the following formula (c-1) [(Rf) s PF 6-s ] - (c-1)
- Rf represents an alkyl group having 1 to 4 carbon atoms in which 80% or more of hydrogen atoms are substituted with fluorine atoms, and s represents an integer of 1 to 5)
- R′f represents an aryl group in which part or all of the hydrogen atoms are substituted with fluorine atoms, and t represents an integer of 0 to 4
- the photocurable composition is an anion represented by:
- the present invention also provides the photocurable composition as described above, wherein the component (D) is silica.
- the present invention also has a viscosity [at 25 ° C., at a shear rate of 20 (1 / s)] of 5 to 20 Pa ⁇ s, and a TI value at 25 ° C. [viscosity at a shear rate of 2 (1 / s) / shear rate of 20].
- the above-mentioned photocurable composition having a viscosity at (1 / s)] of 2 or more is provided.
- the present invention also provides an adhesive for an optical element comprising the photocurable composition.
- the present invention also provides a method for producing an optical component, characterized in that the optical element adhesive is applied to an adherend and irradiated with light.
- the present invention also provides a method for producing the optical component, which includes the following steps.
- Step 1 Applying the optical element adhesive to the optical element array as an adherend, and stacking a plurality of the optical element arrays to produce an optical element array laminate
- Step 2 Irradiating light for optical elements
- Step 3 for curing the adhesive Step for dicing the optical element array laminate
- the present invention also provides a method for producing the above-mentioned optical component in which the application of the adhesive for optical elements is performed using a dispenser.
- the present invention also provides a method for manufacturing the above-described optical component, in which the application of the adhesive for optical elements is performed by screen printing.
- the present invention also provides a method for producing the above-mentioned optical component in which light irradiation is performed using a UV-LED (wavelength: 350 to 400 nm).
- the present invention also provides a method for producing the above-mentioned optical component, wherein the integrated light quantity of light irradiation is 5000 mJ / cm 2 or less.
- the present invention also provides the method for producing an optical component as described above, wherein the coating thickness of the adhesive for optical elements is 0.01 to 0.3 mm.
- the present invention also provides the method for manufacturing an optical component described above, wherein, in step 1, an optical element adhesive is applied to a substrate portion of an optical element array including an optical element portion and a substrate portion.
- the present invention also provides a method for producing the above optical component, wherein the adherend contains an epoxy resin as a constituent material thereof.
- the present invention also provides an optical component obtained by the above-described optical component manufacturing method.
- the present invention also provides the above-mentioned optical component, wherein the area where the cured product of the adhesive for optical elements is in contact with the adherend is 2 to 50% of the adherend surface area.
- the present invention also provides the above optical component, wherein the thickness of the cured product of the adhesive for optical elements is 0.01 to 0.3 mm.
- the present invention is also an optical element array in which the adherend is composed of an optical element portion and a substrate portion, and the area where the cured product of the adhesive for optical elements is in contact with the optical element array is 2 to 50% of the area of the optical element portion.
- An optical component as described above is provided.
- the present invention also provides an optical device provided with the optical component described above.
- the present invention also provides an optical device obtained by mounting the optical component on a substrate by reflow soldering.
- a photocurable composition comprising the following component (A), component (B), component (C), and component (D).
- the compound represented by the formula (a) is (3,4,3 ′, 4′-diepoxy) bicyclohexyl, bis (3,4-epoxycyclohexylmethyl) ether, 1,2-epoxy-1, 2-bis (3,4-epoxycyclohexane-1-yl) ethane, 2,2-bis (3,4-epoxycyclohexane-1-yl) propane, and 1,2-bis (3,4-epoxycyclohexane-
- the photocurable composition according to [2] which is at least one compound selected from the group consisting of 1-yl) ethane.
- Composition. [8] The photocurable composition according to any one of [1] to [7], wherein the content of the component (A) is 20 to 60% by weight of the total cationically polymerizable compound contained in the photocurable composition. Composition.
- the content of the alicyclic epoxy compound having an ester bond in the total cationic polymerizable compound contained in the photocurable composition is 5 to 30% by weight.
- the photocurable composition as described.
- the anion moiety of the photocationic polymerization initiator of component (C) is represented by the following formula (c-1) [(Rf) s PF 6-s ] - (c-1) (In the formula, Rf represents an alkyl group having 1 to 4 carbon atoms in which 80% or more of hydrogen atoms are substituted with fluorine atoms, and s represents an integer of 1 to 5) Or an anion represented by the following formula (c-2) [(R'f) t BF 4- t] - (c-2) (In the formula, R′f represents an aryl group in which part or all of the hydrogen atoms are substituted with fluorine atoms, and t represents an integer of 0 to 4)
- the photocurable composition according to the formula (c-1) [(R
- Anions containing boron are BF 4 ⁇ , [B (C 6 F 5 ) 4 ] ⁇ , [B (C 6 F 4 H) 4 ] ⁇ , [B (C 6 F 3 H 2 ) 4 ]. -, [B (C 6 F 2 H 3) 4] -, and [B (C 6 FH 4) 4] - in which at least one anion selected from the group consisting of [1] to [11]
- the photocurable composition as described in any one.
- Photocationic polymerization initiator is (4-hydroxyphenyl) methylbenzylsulfonium tetrakis (pentafluorophenyl) borate, 4- (4-biphenylylthio) phenyl-4-biphenylylphenylsulfonium tetrakis (pentafluorophenyl) Borate, 4- (phenylthio) phenyldiphenylsulfonium tris (pentafluoroethyl) trifluorophosphate, 4- (phenylthio) phenyldiphenylsulfonium tetrakis (pentafluorophenyl) borate, and [4- (4-biphenylylthio) phenyl]- Any one of [1] to [9], which is at least one compound selected from the group consisting of 4-biphenylylphenylsulfonium tris (pentafluoroethy
- An adhesive for optical elements comprising the photocurable composition according to any one of [1] to [17].
- the adherend is an optical element array composed of an optical element part and a substrate part, and the area where the cured product of the optical element adhesive is in contact with the optical element array is 2 to 50% of the area of the optical element part [ 28] to [30] The optical component according to any one of [30].
- An optical device comprising the optical component according to any one of [28] to [31].
- the photocurable composition of the present invention Since the photocurable composition of the present invention has the above-described configuration, it can be applied by using a discharge device such as a jet dispenser with good control of the discharge amount and the wetting and spreading range without causing stringing.
- the cured product exhibiting excellent curability by UV-LED irradiation and excellent reflow heat resistance can be formed. Further, even in an oxygen atmosphere, a cured product can be formed quickly and while suppressing curing shrinkage.
- a laminate of wafer level lenses can be efficiently produced using UV-LEDs. Since the laminate has resistance to reflow heat, the lens is not peeled off or displaced even when exposed to the reflow process. Therefore, it is not necessary to mount the lens in a separate process, and it is possible to mount the lens collectively by reflow processing, and it is possible to manufacture an optical device on which the lens is mounted with excellent productivity.
- FIG. 1 is a schematic view showing an example of a method for producing an optical component of the present invention, a step (Ia) of applying an optical element adhesive (4) to an optical element array (3), and a step of laminating a plurality of these. (Ib), a step (II) of irradiating light to cure the optical element adhesive to bond the laminated body, and dicing the bonded optical element array laminated body (5) to obtain an optical element module laminated body (9a, 9b) is obtained (III).
- Component (A) is an epoxy compound having an alicyclic epoxy group and having no ester bond.
- the epoxy compound is a cationically polymerizable compound.
- Examples of the epoxy compound having an alicyclic epoxy group and not having an ester bond include compounds represented by the following formula (a).
- R 1 to R 18 in the above formula (a) are the same or different and are a hydrogen atom, a halogen atom, an oxygen atom, a hydrocarbon group which may contain a halogen atom, or an alkoxy group which may have a substituent.
- X represents a single bond or a linking group (excluding a linking group containing an ester bond).
- Examples of the halogen atom in R 1 to R 18 include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- Examples of the hydrocarbon group in R 1 to R 18 include an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aromatic hydrocarbon group, and a group in which two or more of these are bonded.
- Examples of the aliphatic hydrocarbon group include a C 1-20 alkyl group (preferably a C 1-10 alkyl group, particularly a methyl, ethyl, propyl, isopropyl, butyl, hexyl, octyl, isooctyl, decyl, dodecyl group).
- a C 1-4 alkyl group vinyl, allyl, methallyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl C 2-20 alkenyl group such as 5-hexenyl group (preferably C 2-10 alkenyl group, particularly preferably C 2-4 alkenyl group); C 2-20 alkynyl group such as ethynyl, propynyl group (preferably C 2-10 alkynyl group, particularly preferably C 2-4 alkynyl group).
- Examples of the alicyclic hydrocarbon group include C 3-12 cycloalkyl groups such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cyclododecyl groups; C 3-12 cycloalkenyl groups such as cyclohexenyl groups; and bicycloheptanyl. And a C 4-15 bridged cyclic hydrocarbon group such as a bicycloheptenyl group.
- aromatic hydrocarbon group examples include C 6-14 aryl groups (preferably C 6-10 aryl groups) such as phenyl and naphthyl groups.
- the aliphatic hydrocarbon group and the alicyclic hydrocarbon group in a group in which two or more groups selected from the above-described aliphatic hydrocarbon group, alicyclic hydrocarbon group, and aromatic hydrocarbon group are bonded to each other.
- the bonded group include a C 3-12 cycloalkyl-substituted C 1-20 alkyl group such as a cyclohexylmethyl group; a C 1-20 alkyl-substituted C 3-12 cycloalkyl group such as a methylcyclohexyl group. Can do.
- Examples of the group in which an aliphatic hydrocarbon group and an aromatic hydrocarbon group are bonded include, for example, a C 7-18 aralkyl group such as a benzyl group or a phenethyl group (particularly a C 7-10 aralkyl group); 6-14 aryl-C 2-20 alkenyl group; C 1-20 alkyl substituted C 6-14 aryl group such as tolyl group; C 2-20 alkenyl substituted C 6-14 aryl group such as styryl group, etc. it can.
- a C 7-18 aralkyl group such as a benzyl group or a phenethyl group (particularly a C 7-10 aralkyl group)
- 6-14 aryl-C 2-20 alkenyl group C 1-20 alkyl substituted C 6-14 aryl group such as tolyl group
- C 2-20 alkenyl substituted C 6-14 aryl group such as styryl group, etc. it can.
- hydrocarbon group optionally containing an oxygen atom or a halogen atom in R 1 to R 18 at least one hydrogen atom in the above hydrocarbon group is substituted with a group having an oxygen atom or a group having a halogen atom.
- the group etc. can be mentioned.
- the group having an oxygen atom include hydroxyl group; hydroperoxy group; C 1-10 alkoxy group such as methoxy, ethoxy, propoxy, isopropyloxy, butoxy, isobutyloxy group; C 2-10 such as allyloxy group.
- alkoxy group in R 1 to R 18 examples include C 1-10 alkoxy groups such as methoxy, ethoxy, propoxy, isopropyloxy, butoxy, isobutyloxy groups and the like.
- alkoxy group may have include, for example, a halogen atom, a hydroxyl group, a C 1-10 alkoxy group, a C 2-10 alkenyloxy group, a C 6-14 aryloxy group, a C 1-10 Acyloxy group, mercapto group, C 1-10 alkylthio group, C 2-10 alkenylthio group, C 6-14 arylthio group, C 7-18 aralkylthio group, carboxyl group, C 1-10 alkoxycarbonyl group, C 6- 14 aryloxycarbonyl group, C 7-18 aralkyloxycarbonyl group, amino group, mono or di C 1-10 alkylamino group, C 1-10 acylamino group, epoxy group-containing group, oxetanyl group-containing group, C 1-10 Examples include an acyl group, an oxo group, and a group in which two or more of these are bonded through or without a C 1-10 alkylene
- R 1 to R 18 are preferably hydrogen atoms.
- X in the formula (a) represents a single bond or a linking group (excluding a divalent group having one or more atoms and a linking group containing an ester bond).
- the linking group include a divalent hydrocarbon group, an alkenylene group in which part or all of a carbon-carbon double bond is epoxidized, a carbonyl group, an ether bond, an amide group, and a plurality of these groups connected. Groups and the like.
- the divalent hydrocarbon group include linear or branched C 1-18 alkylene groups such as methylene, methylmethylene, dimethylmethylene, ethylene, propylene, and trimethylene groups (preferably linear or branched chain).
- C 1-3 alkylene group 1,2-cyclopentylene, 1,3-cyclopentylene, cyclopentylidene, 1,2-cyclohexylene, 1,3-cyclohexylene, 1,4-cyclohexylene, Examples thereof include a C 3-12 cycloalkylene group such as a cyclohexylidene group, and a C 3-12 cycloalkylidene group (preferably a C 3-6 cycloalkylene group and a C 3-6 cycloalkylidene group).
- alkenylene group in the alkenylene group in which part or all of the carbon-carbon double bond is epoxidized include, for example, vinylene group, propenylene group, 1-butenylene group And straight-chain or branched alkenylene groups having 2 to 8 carbon atoms such as 2-butenylene group, butadienylene group, pentenylene group, hexenylene group, heptenylene group, octenylene group and the like.
- the epoxidized alkenylene group is preferably an alkenylene group in which all of the carbon-carbon double bonds are epoxidized, more preferably 2 to 4 carbon atoms in which all of the carbon-carbon double bonds are epoxidized. Alkenylene group.
- Representative examples of the compound represented by the above formula (a) include (3,4,3 ′, 4′-diepoxy) bicyclohexyl, bis (3,4-epoxycyclohexylmethyl) ether, 1,2- Epoxy-1,2-bis (3,4-epoxycyclohexane-1-yl) ethane, 2,2-bis (3,4-epoxycyclohexane-1-yl) propane, 1,2-bis (3,4- And epoxycyclohexane-1-yl) ethane. These can be used alone or in combination of two or more.
- (3,3 ′, 4,4′-diepoxy) bicyclohexyl and / or bis (3,4-epoxycyclohexylmethyl) are particularly preferred in that a cured product having excellent heat resistance can be obtained. It is preferred to use ether.
- the content of component (A) in the total amount (100% by weight) of the cationically polymerizable compound contained in the photocurable composition is, for example, 20 to 60% by weight, preferably 20 to It is 50% by weight, particularly preferably 30 to 50% by weight.
- content of a component (A) is less than the said range, there exists a tendency for sclerosis
- the content of the component (A) exceeds the above range, the adhesiveness tends to decrease.
- Component (B) of the present invention is an oxetane compound.
- the oxetane compound is a cationically polymerizable compound.
- the oxetane compound is represented, for example, by the following formula (b).
- R a represents a monovalent organic group
- R b represents a hydrogen atom or an ethyl group
- m represents an integer of 0 or more.
- the monovalent organic group in Ra includes a monovalent hydrocarbon group, a monovalent heterocyclic group, a substituted oxycarbonyl group (alkoxycarbonyl group, aryloxycarbonyl group, aralkyloxycarbonyl group, cycloalkyloxycarbonyl group). Etc.), substituted carbamoyl groups (N-alkylcarbamoyl groups, N-arylcarbamoyl groups, etc.), acyl groups (aliphatic acyl groups such as acetyl groups; aromatic acyl groups such as benzoyl groups), and two or more of these A monovalent group bonded through a single bond or a linking group is included.
- Examples of the monovalent hydrocarbon group include the same examples as R 1 to R 18 in the above formula (a).
- the monovalent hydrocarbon group includes various substituents [eg, halogen atom, oxo group, hydroxyl group, substituted oxy group (eg, alkoxy group, aryloxy group, aralkyloxy group, acyloxy group, etc.), carboxyl group, Substituted oxycarbonyl group (alkoxycarbonyl group, aryloxycarbonyl group, aralkyloxycarbonyl group, etc.), substituted or unsubstituted carbamoyl group, cyano group, nitro group, substituted or unsubstituted amino group, sulfo group, heterocyclic group, etc.] You may have.
- the hydroxyl group and carboxyl group may be protected with a protective group commonly used in the field of organic synthesis.
- heterocyclic ring constituting the heterocyclic group examples include a heterocyclic ring containing an oxygen atom as a hetero atom (for example, a 4-membered ring such as an oxetane ring; a furan ring, a tetrahydrofuran ring, an oxazole ring, an isoxazole ring, a ⁇ - 5-membered ring such as butyrolactone ring; 6-membered ring such as 4-oxo-4H-pyran ring, tetrahydropyran ring, morpholine ring; benzofuran ring, isobenzofuran ring, 4-oxo-4H-chromene ring, chroman ring, isochroman ring 3-oxatricyclo [4.3.1.1 4,8 ] undecan-2-one ring, 3-oxatricyclo [4.2.1.0 4,8 ] nonane-2- A bridged ring such as an on-ring), a 4-
- the heterocyclic group optionally has substituent, an alkyl group (e.g., methyl group, etc. C 1-4 alkyl group such as ethyl group), a cycloalkyl group, an aryl group It may have a substituent such as a phenyl group or a naphthyl group.
- linking group examples include a carbonyl group (—CO—), an ether bond (—O—), a thioether bond (—S—), an ester bond (—COO—), an amide bond (—CONH—), and a carbonate bond. (—OCOO—), silyl bond (—Si—), a group in which a plurality of these are linked, and the like.
- Examples of the compound represented by the formula (b) include 3-methoxyoxetane, 3-ethoxyoxetane, 3-propoxyoxetane, 3-isopropoxyoxetane, 3- (n-butoxy) oxetane, and 3-isobutoxyoxetane.
- oxetane compounds include “Aron oxetane OXT-101”, “Aron oxetane OXT-121”, “Aron oxetane OXT-212”, “Aron oxetane OXT-211”, “Aron oxetane OXT-213”, “Aron oxetane”.
- Commercial products such as “OXT-221” and “Aron Oxetane OXT-610” (manufactured by Toagosei Co., Ltd.) can be used.
- the content of component (B) in the total amount (100% by weight) of the cationically polymerizable compound contained in the photocurable composition is, for example, 5 to 40% by weight, preferably 5 to 30% by weight, particularly preferably 10 to 30% by weight.
- the content of the component (B) is out of the above range, it is difficult to obtain fast curability and the initial adhesive force tends to be reduced.
- the photocurable composition of the present invention may contain other cationically polymerizable compounds in addition to the components (A) and (B).
- cationic polymerizable compounds include, for example, cationic polymerizable compounds having a weight average molecular weight of 500 or more (preferably 500 to 100,000, more preferably 500 to 80000, particularly preferably 500 to 50000, most preferably 1000 to 10,000). (Hereinafter sometimes referred to as “high molecular weight cation polymerizable compound”) or a cationic polymerizable compound having a weight average molecular weight or molecular weight of less than 500 (for example, about 100 to 450, preferably 100 to 300) (hereinafter referred to as “low molecular weight cation”). May be referred to as “polymerizable compound”).
- the initial curing rate can be further improved by adding a low molecular weight cationically polymerizable compound.
- the high molecular weight cationic polymerizable compound and the low molecular weight cationic polymerizable compound are compounds containing a cationic polymerizable functional group, and the number of cationic polymerizable functional groups contained in one molecule is preferably 2 or more.
- Examples of the cationic polymerizable functional group include electron donating groups such as a hydroxyl group, an epoxy group, and an oxetanyl group.
- the high molecular weight cationic polymerizable compound and the low molecular weight cationic polymerizable compound of the present invention may contain one kind of the electron donating group alone or in combination of two or more kinds.
- the high molecular weight cationically polymerizable compound examples include a compound having a main chain selected from a polycarbonate skeleton, a polyester skeleton, a polydiene skeleton, a novolak skeleton, an alicyclic skeleton, and the like and a side chain containing the cation polymerizable functional group.
- a side chain containing the cation polymerizable functional group can be mentioned. Specific examples include the compounds described in Japanese Patent Application No. 2013-004758. These can be used alone or in combination of two or more.
- Examples of the low molecular weight cationic polymerizable compound include epoxy compounds other than the compound represented by the above formula (a) [for example, aromatic glycidyl ether type epoxy compounds such as bisphenol A type epoxy compounds and bisphenol F type epoxy compounds; Alicyclic glycidyl ether epoxy compounds obtained by hydrogenating glycidyl ether epoxy compounds; aliphatic glycidyl ether epoxy compounds such as mono- or polyglycidyl ethers of aliphatic polyhydric alcohols; glycidyl ester epoxy compounds; glycidyl amines Epoxy compound; alicyclic epoxy compound having ester bond; epoxy-modified siloxane compound (for example, epoxy-modified polyorganosilsesquioxane, epoxy-modified silicone, etc.)] or hydroxyl group-containing compound (diethylene) Glycol), such as, it is preferable to use a low molecular weight cationic polymerizable compound containing an epoxy group or a
- the blending amount of other cationically polymerizable compounds in the total amount (100% by weight) of the cationically polymerizable compound contained in the photocurable composition of the present invention is, for example, 20 to 60% by weight. It is preferably 25 to 60% by weight, particularly preferably 30 to 55% by weight, and most preferably 40 to 55% by weight.
- the blending amount of the alicyclic epoxy compound having an ester bond in the total amount (100% by weight) of the cationically polymerizable compound contained in the photocurable composition of the present invention is, for example, 5 to 30% by weight, preferably 10 to 30% by weight, particularly preferably 10 to 20% by weight.
- the content of the alicyclic epoxy compound having an ester bond exceeds the above range, it becomes difficult to obtain fast curability and the initial adhesive force tends to decrease.
- Compounding amount of high molecular weight cationic polymerizable compound (especially high molecular weight cationic polymerizable compound containing an epoxy group or hydroxyl group) in the total amount (100 wt%) of the cationic polymerizable compound contained in the photocurable composition of the present invention (2
- the total amount) is, for example, 10 to 40% by weight, preferably 10 to 30% by weight, particularly preferably 20 to 30% by weight.
- the blending amount of the low molecular weight cationic polymerizable compound in the total amount (100% by weight) of the cationic polymerizable compound contained in the photocurable composition of the present invention is, for example, 10 to 50% by weight. It is preferably 20 to 50% by weight, particularly preferably 20 to 40% by weight.
- the above component (A), component (B), and a high amount containing an epoxy group or a hydroxyl group as other cationically polymerizable compounds In the total amount (100% by weight) of the cationically polymerizable compound contained in the photocurable composition of the present invention, the above component (A), component (B), and a high amount containing an epoxy group or a hydroxyl group as other cationically polymerizable compounds.
- the content of the cationic polymerizable compound other than the molecular weight cationic polymerizable compound and the low molecular weight cationic polymerizable compound containing an epoxy group or a hydroxyl group is, for example, 30% by weight or less, preferably 20% by weight or less, and particularly preferably 10% by weight. It is as follows.
- a photocationic polymerization initiator having an anion containing phosphorus to which a fluorinated alkyl group is bonded or an anion containing boron as an anion portion is used.
- a photocationic polymerization initiator can be used individually by 1 type or in combination of 2 or more types.
- the anion containing phosphorus to which the fluorinated alkyl group is bonded is preferably a fluorinated alkylfluorophosphate anion represented by the following formula (c-1).
- [(Rf) s PF 6-s ] - (c-1) (In the formula, Rf represents an alkyl group having 1 to 4 carbon atoms in which 80% or more of hydrogen atoms are substituted with fluorine atoms, and s represents an integer of 1 to 5)
- Rf is an alkyl group having 1 to 4 carbon atoms in which 80% or more of hydrogen atoms are substituted with fluorine atoms, and among them, CF 3 , C 2 F 5 , (CF 3 ) 2 CF, C 3 F 7 , C 4 F 9 , (CF 3 ) 2 CFCF 2 , CF 3 CF 2 (CF 3 ) CF, (CF 3 ) 3 C, etc., a straight or branched chain in which all hydrogen atoms are substituted with fluorine atoms C 1-4 alkyl groups are preferred.
- examples of the anion containing phosphorus to which a fluorinated alkyl group is bonded include [(C 2 F 5 ) 3 PF 3 ] ⁇ , [(C 3 F 7 ) 3 PF 3 ] ⁇ , [((CF 3 ) 2 CF ) 3 PF 3 ] ⁇ , [((CF 3 ) 2 CF) 2 PF 4 ] ⁇ , [((CF 3 ) 2 CFCF 2 ) 3 PF 3 ] ⁇ , and [((CF 3 ) 2 CFCF 2 ) 2 PF 4] -, and the like are preferable.
- the anion containing boron is preferably an anion represented by the following formula (c-2). [(R'f) t BF 4- t] - (c-2) (In the formula, R′f represents an aryl group in which part or all of the hydrogen atoms are substituted with fluorine atoms, and t represents an integer of 0 to 4)
- R′f is an aryl group in which some or all of the hydrogen atoms are substituted with fluorine atoms.
- R′f is an aryl group in which some or all of the hydrogen atoms are substituted with fluorine atoms.
- anions containing boron include BF 4 ⁇ , [B (C 6 F 5 ) 4 ] ⁇ , [B (C 6 F 4 H) 4 ] ⁇ , [B (C 6 F 3 H 2 ) 4 ].
- -, [B (C 6 F 2 H 3) 4] -, [B (C 6 FH 4) 4] - or the like are preferable, and [B (C 6 F 5) 4] - such as the above-mentioned formula (c- Fluorinated arylborate anions and fluorinated arylfluoroborate anions in which R′f in 2) is an aryl group in which all hydrogen atoms are substituted with fluorine atoms are preferred.
- examples of the cation part of the photocationic polymerization initiator include iodonium ions, sulfonium ions, selenium ions, and the like.
- a sulfonium ion is particularly preferable.
- sulfonium ion examples include arylsulfonium ions such as (4-hydroxyphenyl) methylbenzylsulfonium ion, triphenylsulfonium ion, diphenyl [4- (phenylthio) phenyl] sulfonium ion, and tri-p-tolylsulfonium ion (particularly, , Triarylsulfonium ion).
- arylsulfonium ions such as (4-hydroxyphenyl) methylbenzylsulfonium ion, triphenylsulfonium ion, diphenyl [4- (phenylthio) phenyl] sulfonium ion, and tri-p-tolylsulfonium ion (particularly, , Triarylsulfonium ion).
- Examples of the photocationic polymerization initiator of the present invention include (4-hydroxyphenyl) methylbenzylsulfonium tetrakis (pentafluorophenyl) borate, 4- (4-biphenylylthio) phenyl-4-biphenylylphenylsulfonium tetrakis (penta Fluorophenyl) borate, 4- (phenylthio) phenyldiphenylsulfonium tris (pentafluoroethyl) trifluorophosphate, 4- (phenylthio) phenyldiphenylsulfonium tetrakis (pentafluorophenyl) borate, [4- (4-biphenylylthio) phenyl ] -4-biphenylylphenylsulfonium, tris (pentafluoroethyl) trifluorophosphate and the like are preferable.
- the content of component (C) is, for example, 0.1 to 20 parts by weight, preferably 100 to 20 parts by weight, based on 100 parts by weight of the cationically polymerizable compound (the total amount when containing two or more kinds) contained in the photocurable composition. Is 0.5 to 10 parts by weight, particularly preferably 0.5 to 5 parts by weight.
- content of a component (C) is less than the said range, there exists a tendency for sclerosis
- content of a component (C) exceeds the said range, there exists a tendency for the storage stability of a photocurable composition to fall.
- Component (D) of the present invention is an inorganic filler. Since the photocurable composition of the present invention contains an inorganic filler, it has high thixotropic properties. Therefore, it is possible to accurately control the discharge amount when discharging using the discharge device. Further, the shape stability after discharge is excellent, and the wet spread range can be well controlled.
- Silica can be suitably used as the inorganic filler of the present invention.
- Examples of the shape of the inorganic filler include a true sphere, a substantially true sphere, a plate shape (square plate shape, disk shape), a cube, a rectangular parallelepiped, a prismatic shape, a columnar shape, a lump shape, and the like.
- the primary average particle diameter of the inorganic filler (when the inorganic filler is plate-like, the long axis length) is, for example, 5 to 100 nm, particularly preferably 5 to 50 nm.
- the average particle diameter in this invention is the value calculated
- the specific surface area of the inorganic filler for example, 100 ⁇ 500m 2 / g, particularly preferably 200 ⁇ 400m 2 / g.
- the inorganic filler may be surface-modified with a surface modifier such as a silane coupling agent.
- the content (blending amount) of component (D) is, for example, 1 to 10% by weight, preferably 3 to 8% by weight, particularly preferably 3 to 6% by weight, based on the total amount (100% by weight) of the photocurable composition. . Further, for example, 1 to 10 parts by weight, preferably 3 to 8 parts by weight, particularly preferably 100 parts by weight of the cationically polymerizable compound contained in the photocurable composition (the total amount when containing two or more kinds). 3 to 6 parts by weight.
- the content of the component (D) exceeds the above range, the viscosity becomes too high and it tends to be difficult to discharge using the discharge device.
- the component (D) is less than the above range, the shape stability after ejection is lowered, and it tends to be difficult to control the wet spread range.
- the photocurable composition of the present invention may contain other components in addition to the above cationic polymerizable compound, photocationic polymerization initiator, and inorganic filler as long as the effects of the present invention are not impaired.
- Other components include, for example, photosensitizers, antifoaming agents, leveling agents, coupling agents, surfactants, flame retardants, ultraviolet absorbers, ion adsorbers, phosphors, mold release agents, dispersants, and dispersions. Conventional additives such as auxiliaries can be mentioned. These contents (the total amount when two or more kinds are contained) are about 10% by weight or less of the total amount (100% by weight) of the photocurable composition.
- the photocurable composition of the present invention can be prepared, for example, by stirring and mixing the above components at a predetermined ratio and defoaming under vacuum as necessary.
- the viscosity of the photocurable composition of the present invention [at 25 ° C., shear rate 20 (1 / s)] is, for example, 5 to 20 Pa ⁇ s, preferably 10 to 20 Pa ⁇ s.
- the viscosity of the present invention can be measured using a rheometer (trade name “PHYSICA UDS200”, manufactured by Anton Paar).
- the photocurable composition of the present invention has high thixotropic properties, and the TI value at 25 ° C. is, for example, 2 or more, preferably 2 to 5.5, particularly preferably 2 to 4, particularly preferably 2 to 3.5. It is.
- the TI value Thixotropy Index
- the TI value is the ratio of the viscosity at a shear rate of 2 (1 / s) to the viscosity at a shear rate of 20 (1 / s) [viscosity / shear rate at a shear rate of 2 (1 / s). Viscosity at 20 (1 / s)] and can be measured using a rheometer (trade name “PHYSICA UDS200”, manufactured by Anton Paar).
- the photocurable composition of the present invention has both the above viscosity and thixotropy, it is possible to suppress the wetting and spreading of droplets when discharged using a discharge device (for example, a jet dispenser).
- a discharge device for example, a jet dispenser.
- the shape can be maintained.
- wetting and spreading of the droplets cannot be suppressed, and it tends to be difficult to maintain the coating shape.
- the viscosity exceeds the above range, it tends to be difficult to discharge using the discharge device.
- the TI value is out of the above range, it tends to be difficult to combine good ejection properties and the ability to suppress droplet wetting and spreading.
- the photocurable composition of the present invention is excellent in curability and can quickly form a cured product when irradiated with light.
- the light (active energy ray) used for the light irradiation may be any light that causes the polymerization reaction of the photocurable composition to proceed, and may be infrared rays, visible rays, ultraviolet rays, X-rays, electron beams, ⁇ rays, ⁇ rays, Any of gamma rays and the like can be used, but ultraviolet rays are preferable in terms of excellent handleability.
- a UV-LED (wavelength: 350 to 400 nm)
- a high-pressure mercury lamp for example, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a xenon lamp, a carbon arc, a metal halide lamp, sunlight, a laser, or the like
- a photocurable composition of the present invention has excellent curability, a cured product can be formed by promptly proceeding with a curing reaction even by light irradiation with a UV-LED.
- the integrated light amount can be adjusted to, for example, 5000 mJ / cm 2 or less (for example, 2500 to 5000 mJ / cm 2 ) when irradiating ultraviolet rays. preferable.
- the cured product of the photocurable composition of the present invention has an excellent initial adhesive force, for example, 5 MPa or more, preferably 6 MPa or more, particularly preferably 7 MPa or more.
- the cured product of the photocurable composition of the present invention has excellent heat resistance, and the adhesive strength after being subjected to a heat test (three consecutive times) based on a reflow temperature file (maximum temperature: 270 ° C.) is, for example, 5 MPa or more, preferably 6 MPa or more, particularly preferably 7 MPa or more.
- adhesive force can be measured by the method as described in an Example.
- the photocurable composition of the present invention can control the discharge amount and the wetting spread range well using a discharge device or the like, and can quickly become heat resistant by irradiating light using a UV-LED or the like. Since an excellent cured product can be formed, it can be suitably used as an adhesive for optical elements (particularly, a lens adhesive such as an adhesive for laminating wafer level lenses).
- the method for producing an optical component of the present invention is characterized in that an optical element adhesive containing the photocurable composition is applied to an adherend and irradiated with light.
- the method for producing an optical component of the present invention comprises an optical element adhesive comprising the photocurable composition (the content of the photocurable composition is, for example, 60% by weight or more, preferably 80% by weight of the total amount of the adhesive for optical elements) Therefore, an optical element array (a structure having a structure in which a plurality of optical element portions (for example, lens portions) such as a wafer level lens array are formed on a substrate portion) is suitable for the adherend. It is. Further, as the adherend, a material containing an epoxy resin as a constituent material is preferable in that it can exhibit particularly excellent adhesiveness.
- the method for manufacturing an optical component of the present invention preferably includes the following steps.
- Step 1 An optical element adhesive containing the photocurable composition is applied to an optical element array (consisting of a plurality of optical element parts and a substrate part) as an adherend, and a plurality of such elements (for example, 2 Step 5 for stacking and manufacturing an optical element array laminate
- Step 2 Step for irradiating light to cure the adhesive for optical elements
- Step 3 Step for dicing the optical element array laminate
- Examples of the method of applying the optical element adhesive in Step 1 to an adherend include a method using a dispenser, a screen printing method, a curtain coating method, a spray method, and the like. In the present invention, among these, a method using a dispenser and a method by screen printing are preferable.
- the coating thickness of the optical element adhesive is, for example, 0.01 to 0.3 mm, preferably 0.05 to 0.2 mm.
- the application range of the adhesive for the optical element is preferably applied to the substrate portion of the optical element array composed of the optical element portion and the substrate portion, and is 2 to 50% (preferably 2 to 30%,
- the adhesive for optical elements is preferably applied in a range of 2 to 20%, most preferably 2 to 10%. Further, it is preferable to apply the adhesive for optical elements to a range of 2 to 50% (preferably 2 to 30%, particularly preferably 2 to 20%) of the area including nine optical elements in the optical element array. . Furthermore, it is preferable to apply the optical element adhesive in a range of 2 to 60% (preferably 2 to 40%, particularly preferably 2 to 30%) of the area of the substrate portion in the optical element array.
- the adhesive for optical elements of this invention contains the said photocurable composition, it can control a discharge amount and a wetting-spreading range to the said range favorably using a discharge apparatus etc. If the application site is out of the above range, or the application area is out of the above range, the optical characteristics of the optical element tend to deteriorate. On the other hand, when the application area is less than the above range, the adhesive strength may be insufficient.
- Step 2 is a step of curing the adhesive for optical elements to bond and fix the optical element array laminate.
- the light used for light irradiation and the accumulated light amount are determined in the photocurable composition of the present invention. This is the same as the light used and its accumulated light quantity.
- step 3 the optical element array stack having the optical element portion formed on the substrate portion is cut at the substrate portion, so that a plurality of optical element modules each including one optical element portion and a peripheral substrate portion are provided.
- This is a step of separating into a laminated optical element module laminate.
- the dicing is performed using a cutting means such as a dicing blade.
- the area where the cured product of the adhesive for optical elements is in contact with the adherend is, for example, 2 to 50% (preferably 2 to 30%, particularly preferably 2 to 30%) of the adherend surface area. 20%).
- the area where the cured product of the adhesive for optical elements is in contact with the optical element module is, for example, 2 to 50% (preferably 2 to 30%, particularly preferably 2 to 20%) of the substrate part area. ), Preferably 2 to 50% (preferably 2 to 30%, particularly preferably 2 to 20%) of the area of the optical element portion, and the thickness of the cured product of the adhesive for optical elements is, for example, 0 A thickness of 0.01 to 0.3 mm (preferably 0.05 to 0.2 mm) is preferable in terms of having both excellent adhesiveness and optical characteristics.
- an optical component for example, a digital image sensor lens unit such as a digital camera, a mobile phone with a camera, or a surveillance camera
- an optical component for example, a camera lens unit obtained by the optical component manufacturing method of the present invention has an optical element module bonded and fixed with the optical element adhesive having excellent heat resistance. Even if it is subjected to a substrate mounting process in which solder (particularly lead-free soldering) is performed using, the lens will not peel off or be displaced.
- the adhesive for optical elements can control the discharge amount and the wetting and spreading range well, it can be selectively applied to the substrate portion of the optical element module, thereby reducing the optical performance of the optical element. It can be bonded without any problems.
- An optical device of the present invention (for example, a digital camera, a mobile phone with a camera, a surveillance camera, or the like) includes the above-described optical component, and has excellent optical performance (number of pixels, resolution).
- the optical element of the present invention is bonded and fixed with an adhesive having heat resistance sufficient to mount on a substrate by reflow soldering, there is no need to mount the lens in a separate process, and the reflow process Mounting is possible in a lump, and the optical device can be manufactured efficiently and at low cost.
- the obtained bicyclohexyl-3,3′-diene (243 g) and ethyl acetate (730 g) were charged into a reactor, and nitrogen was blown into the gas phase portion, and the temperature in the reaction system was controlled to 37.5 ° C. Then, 274 g of 30 wt% peracetic acid in ethyl acetate (water content: 0.41 wt%) was added dropwise over about 3 hours. After the peracetic acid solution was dropped, the reaction was terminated by aging at 40 ° C. for 1 hour.
- the crude liquid at the end of the reaction was washed with water at 30 ° C., and the low boiling point compound was removed at 70 ° C./20 mmHg to obtain 270 g of an alicyclic epoxy compound.
- the oxirane oxygen concentration of the obtained alicyclic epoxy compound was 15.0% by weight.
- Examples 1 to 6 and Comparative Examples 1 to 4 (Production of Photocurable Composition) A cationically polymerizable compound and a photocationic polymerization initiator were added to a container equipped with a stirrer at the blending ratio (unit: part by weight) shown in Table 1, and stirred at room temperature for 4 hours to mix uniformly. An inorganic filler was added to the obtained mixed solution, and the mixture was stirred for 2 hours using a homodisper (trade name “Homodisper”, manufactured by Primix Co., Ltd.). Stirring was stopped and the mixture was allowed to stand for 1 hour to obtain a photocurable composition, and the following evaluation was performed on the obtained photocurable composition.
- a homodisper trade name “Homodisper”, manufactured by Primix Co., Ltd.
- the viscosity (Pa ⁇ s) of the photocurable composition was measured using a rheometer (trade name “PHYSICA UDS200”, manufactured by Anton Paar) at a temperature of 25 ° C. and a rotation speed of 20 / sec.
- a 10 mL light-shielding syringe (trade name “UV Block Syringe”, manufactured by Musashi Engineering Co., Ltd.) is filled with the photocurable composition, and a jet dispenser (trade name “Aero Jet”, manufactured by Musashi Engineering Co., Ltd.) is used.
- a photocurable composition to a slide glass (trade name “S1112”, manufactured by Matsunami Glass Industry Co., Ltd.) so that the coating diameter (or droplet diameter) is 1.0 mm ⁇ 0.2 mm. And evaluated according to the following criteria.
- tool which measures adhesive force, or was unable to set was described as measurement impossible.
- an epoxy resin (trade name “Celoxide 2021P”, manufactured by Daicel Corporation) and a cationic polymerization initiator (trade name “Sun-Aid SI-100L”, manufactured by Sanshin Chemical Co., Ltd.) 0
- the epoxy resin composition obtained by adding 5% by weight was heated at 150 ° C. for 15 minutes using an imprint molding machine (trade name “NANOIMPRINTER NM-0501”, manufactured by Myeongchang Kiko Co., Ltd.) and cured. Then, a flat plate (thickness: 1.0 mm) obtained by molding, then releasing, and annealing by heating in an oven preheated to 150 ° C. for 30 minutes was used.
- Dicing blade thickness 0.1mm
- Dicing speed 30 mm / second Dicing blade rotation speed: 30000 rpm
- CCD camera trade name “VH-Z20UR”, manufactured by Keyence Corporation
- Adhesion area (Area where the cured product of the photocurable composition is adhered (mm 2 )) / (Area of flat plate (mm 2 )) ⁇ 100
- C-1 4- (phenylthio) phenyldiphenylsulfonium tris (pentafluoroethyl) trifluorophosphate
- c-2 [4- (4-biphenylylthio) phenyl] -4-biphenylylphenylsulfonium tris ( Pentafluoroethyl) trifluorophosphate
- c-3 4- (phenylthio) phenyldiphenylsulfonium tetrakis (pentafluorophenyl) borate
- CPI-100P propylene carbonate 50% solution of 4- (phenylthio) phenyldiphenylsulfonium hexafluorophosphate, Product name “CPI-100P”, manufactured by San Apro Co., Ltd.
- D-1 Hydrophilic fumed silica, specific surface area (BET method): 300 ⁇ 30 m 2 / g, trade name “Aerosil 300”, manufactured by Nippon Aerosil Co., Ltd.
- the photocurable composition of the present invention can be applied by using a discharge device such as a jet dispenser and controlling the discharge amount and the wetting and spreading range well without causing stringing.
- a cured product excellent in reflow heat resistance can be formed by expressing excellent curability by irradiation. Further, even in an oxygen atmosphere, a cured product can be formed quickly and while suppressing curing shrinkage. Therefore, the photocurable composition of the present invention is useful as an adhesive for optical elements.
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Abstract
Description
また、得られる硬化物の耐熱性が不十分であり、鉛フリーハンダを使用したリフロー半田付けにより基板実装する場合、レンズの剥がれや位置ずれが発生することが問題であった。
更に、塗布後の形状安定性が低い為、ジェットディスペンサー等の吐出装置を使用して吐出量及び濡れ広がり範囲をコントロールすることが困難であり、レンズ部に接着剤が付着して光学特性が低下することも問題であった。
本発明の他の目的は、前記光硬化性組成物を含む光学素子用接着剤を提供することにある。
本発明の更に他の目的は、前記光学素子用接着剤を使用することを特徴とする光学部品の製造方法を提供することにある。
本発明の更に他の目的は、前記製造方法により得られる光学部品や、該光学部品を備えた光学装置を提供することにある。
成分(A):脂環式エポキシ基を有し、且つエステル結合を有しないエポキシ化合物
成分(B):オキセタン化合物
成分(C):フッ化アルキル基が結合したリンを含むアニオン、又はホウ素を含むアニオンを有する光カチオン重合開始剤
成分(D):無機フィラー
[(Rf)sPF6-s]- (c-1)
(式中、Rfは水素原子の80%以上がフッ素原子で置換された炭素数1~4のアルキル基を示し、sは1~5の整数を示す)
で表されるアニオン、又は下記式(c-2)
[(R’f)tBF4-t]- (c-2)
(式中、R’fは水素原子の一部又は全部がフッ素原子で置換されたアリール基を示し、tは0~4の整数を示す)
で表されるアニオンである前記の光硬化性組成物を提供する。
工程1:前記の光学素子用接着剤を被着体としての光学素子アレイに塗布し、これを複数枚積層して光学素子アレイ積層体を製造する工程
工程2:光を照射して光学素子用接着剤を硬化させる工程
工程3:光学素子アレイ積層体をダイシングする工程
[1] 下記成分(A)、成分(B)、成分(C)、及び成分(D)を含む光硬化性組成物。
成分(A):脂環式エポキシ基を有し、且つエステル結合を有しないエポキシ化合物
成分(B):オキセタン化合物
成分(C):フッ化アルキル基が結合したリンを含むアニオン、又はホウ素を含むアニオンを有する光カチオン重合開始剤
成分(D):無機フィラー
[2] 成分(A)が、式(a)で表される化合物である[1]に記載の光硬化性組成物。
[3] 式(a)で表される化合物が、(3,4,3’,4’-ジエポキシ)ビシクロヘキシル、ビス(3,4-エポキシシクロヘキシルメチル)エーテル、1,2-エポキシ-1,2-ビス(3,4-エポキシシクロヘキサン-1-イル)エタン、2,2-ビス(3,4-エポキシシクロヘキサン-1-イル)プロパン、及び1,2-ビス(3,4-エポキシシクロヘキサン-1-イル)エタンからなる群より選択される少なくとも1種の化合物である[2]に記載の光硬化性組成物。
[4] 成分(B)が、式(b)で表される化合物である[1]~[3]の何れか1つに記載の光硬化性組成物。
[5] 式(b)で表される化合物が、式(b-1)~(b-15)で表される化合物からなる群より選択される少なくとも1種の化合物である[4]に記載の光硬化性組成物。
[6] 成分(A)、(B)以外に、カチオン重合性官能基としてエポキシ基又は水酸基を含有する、重量平均分子量が1000~10000のカチオン重合性化合物を、光硬化性組成物に含まれる全カチオン重合性化合物の10~40重量%含有する[1]~[5]の何れか1つに記載の光硬化性組成物。
[7] 成分(B)の含有量が光硬化性組成物に含まれる全カチオン重合性化合物の5~40重量%である[1]~[6]の何れか1つに記載の光硬化性組成物。
[8] 成分(A)の含有量が光硬化性組成物に含まれる全カチオン重合性化合物の20~60重量%である[1]~[7]の何れか1つに記載の光硬化性組成物。
[9] 光硬化性組成物に含まれる全カチオン重合性化合物におけるエステル結合を有する脂環式エポキシ化合物の含有量が5~30重量%である[1]~[8]の何れか1つに記載の光硬化性組成物。
[10] 成分(C)の光カチオン重合開始剤のアニオン部が、下記式(c-1)
[(Rf)sPF6-s]- (c-1)
(式中、Rfは水素原子の80%以上がフッ素原子で置換された炭素数1~4のアルキル基を示し、sは1~5の整数を示す)
で表されるアニオン、又は下記式(c-2)
[(R’f)tBF4-t]- (c-2)
(式中、R’fは水素原子の一部又は全部がフッ素原子で置換されたアリール基を示し、tは0~4の整数を示す)
で表されるアニオンである[1]~[9]の何れか1つに記載の光硬化性組成物。
[11] フッ化アルキル基が結合したリンを含むアニオンが、[(C2F5)3PF3]-、[(C3F7)3PF3]-、[((CF3)2CF)3PF3]-、[((CF3)2CF)2PF4]-、[((CF3)2CFCF2)3PF3]-、及び[((CF3)2CFCF2)2PF4]-からなる群より選択される少なくとも1種のアニオンである[1]~[10]の何れか1つに記載の光硬化性組成物。
[12] ホウ素を含むアニオンが、BF4 -、[B(C6F5)4]-、[B(C6F4H)4]-、[B(C6F3H2)4]-、[B(C6F2H3)4]-、及び[B(C6FH4)4]-からなる群より選択される少なくとも1種のアニオンである[1]~[11]の何れか1つに記載の光硬化性組成物。
[13] 光カチオン重合開始剤のカチオン部がアリールスルホニウムイオンである[1]~[12]の何れか1つに記載の光硬化性組成物。
[14] 光カチオン重合開始剤が、(4-ヒドロキシフェニル)メチルベンジルスルホニウム テトラキス(ペンタフルオロフェニル)ボレート、4-(4-ビフェニリルチオ)フェニル-4-ビフェニリルフェニルスルホニウム テトラキス(ペンタフルオロフェニル)ボレート、4-(フェニルチオ)フェニルジフェニルスルホニウム トリス(ペンタフルオロエチル)トリフルオロホスフェート、4-(フェニルチオ)フェニルジフェニルスルホニウム テトラキス(ペンタフルオロフェニル)ボレート、及び[4-(4-ビフェニリルチオ)フェニル]-4-ビフェニリルフェニルスルホニウム トリス(ペンタフルオロエチル)トリフルオロホスフェートからなる群より選択される少なくとも1種の化合物である[1]~[9]の何れか1つに記載の光硬化性組成物。
[15] 成分(D)の含有量が光硬化性組成物全量の1~10重量%である[1]~[14]の何れか1つに記載の光硬化性組成物。
[16] 成分(D)がシリカである[1]~[15]の何れか1つに記載の光硬化性組成物。
[17] 粘度[25℃、せん断速度20(1/s)における]が5~20Pa・s、且つ25℃におけるTI値[せん断速度2(1/s)時の粘度/せん断速度20(1/s)時の粘度]が2以上である[1]~[16]の何れか1つに記載の光硬化性組成物。
[18] [1]~[17]の何れか1つに記載の光硬化性組成物を含む光学素子用接着剤。
[19] [18]に記載の光学素子用接着剤を被着体に塗布して、光を照射することを特徴とする光学部品の製造方法。
[20] 下記工程を有する[19]に記載の光学部品の製造方法。
工程1:[18]に記載の光学素子用接着剤を被着体としての光学素子アレイに塗布し、これを複数枚積層して光学素子アレイ積層体を製造する工程
工程2:光を照射して光学素子用接着剤を硬化させる工程
工程3:光学素子アレイ積層体をダイシングする工程
[21] 光学素子用接着剤の塗布を、ディスペンサーを使用して行う[19]又は[20]に記載の光学部品の製造方法。
[22] 光学素子用接着剤の塗布を、スクリーン印刷により行う[19]又は[20]に記載の光学部品の製造方法。
[23] 光照射をUV-LED(波長:350~400nm)を使用して行う[19]~[22]の何れか1つに記載の光学部品の製造方法。
[24] 光照射の積算光量が5000mJ/cm2以下である[19]~[23]の何れか1つに記載の光学部品の製造方法。
[25] 光学素子用接着剤の塗布厚が0.01~0.3mmである[19]~[24]の何れか1つに記載の光学部品の製造方法。
[26] 工程1において、光学素子部と基板部からなる光学素子アレイの基板部に光学素子用接着剤を塗布する[20]~[25]の何れか1つに記載の光学部品の製造方法。
[27] 被着体が、その構成材料にエポキシ樹脂を含有する[19]~[26]の何れか1つに記載の光学部品の製造方法。
[28] [19]~[27]の何れか1つに記載の光学部品の製造方法により得られる光学部品。
[29] 光学素子用接着剤の硬化物が被着体と接する面積が、被着体表面積の2~50%である[28]に記載の光学部品。
[30] 光学素子用接着剤の硬化物の厚みが0.01~0.3mmである[28]又は[29]に記載の光学部品。
[31] 被着体が光学素子部と基板部からなる光学素子アレイであり、光学素子用接着剤の硬化物が光学素子アレイと接する面積が、光学素子部面積の2~50%である[28]~[30]の何れか1つに記載の光学部品。
[32] [28]~[31]の何れか1つに記載の光学部品を備えた光学装置。
[33] [28]~[31]の何れか1つに記載の光学部品をリフロー半田付けにより基板実装して得られる光学装置。
成分(A)は脂環式エポキシ基を有し、且つエステル結合を有しないエポキシ化合物である。前記エポキシ化合物は、カチオン重合性化合物である。
本発明の成分(B)はオキセタン化合物である。オキセタン化合物は、カチオン重合性化合物である。
本発明の光硬化性組成物は、上記成分(A)、(B)以外にも他のカチオン重合性化合物を含有していてもよい。
光カチオン重合開始剤(=光酸発生剤)は、光の照射によって酸を発生して、光硬化性組成物に含まれるカチオン重合性化合物の硬化反応を開始させる化合物であり、光を吸収するカチオン部と酸の発生源となるアニオン部からなる。本発明においては、アニオン部としてフッ化アルキル基が結合したリンを含むアニオン、又はホウ素を含むアニオンを有する光カチオン重合開始剤を使用することを特徴とする。光カチオン重合開始剤は1種を単独で、又は2種以上を組み合わせて使用することができる。
[(Rf)sPF6-s]- (c-1)
(式中、Rfは水素原子の80%以上がフッ素原子で置換された炭素数1~4のアルキル基を示し、sは1~5の整数を示す)
[(R’f)tBF4-t]- (c-2)
(式中、R’fは水素原子の一部又は全部がフッ素原子で置換されたアリール基を示し、tは0~4の整数を示す)
本発明の成分(D)は無機フィラーである。本発明の光硬化性組成物は無機フィラーを含有するためチクソトロピー性が高い。そのため、吐出装置を用いて吐出する場合に吐出量のコントロールを精度良く行うことができる。また、吐出後の形状安定性に優れ、濡れ広がり範囲を良好にコントロールすることができる。
本発明の光学部品の製造方法は、上記光硬化性組成物を含む光学素子用接着剤を被着体に塗布して、光を照射することを特徴とする。本発明の光学部品の製造方法は上記光硬化性組成物を含む光学素子用接着剤(上記光硬化性組成物の含有量は光学素子用接着剤全量の例えば60重量%以上、好ましくは80重量%以上)を使用するため、被着体には光学素子アレイ(ウェハレベルレンズアレイ等の、複数の光学素子部(例えば、レンズ部)が基板部に形成された構成を有する構造体)が好適である。また、被着体としては、構成材料にエポキシ樹脂を含有するものが、特に優れた接着性を発揮することができる点で好ましい。
工程1:上記光硬化性組成物を含む光学素子用接着剤を被着体としての光学素子アレイ(複数個の光学素子部と基板部からなる)に塗布し、これを複数枚(例えば、2~5枚)積層して光学素子アレイ積層体を製造する工程
工程2:光を照射して光学素子用接着剤を硬化させる工程
工程3:光学素子アレイ積層体をダイシングする工程
本発明の光学装置(例えば、デジタルカメラ、カメラ付き携帯電話、監視カメラ等)は、上記光学部品を備えることを特徴とし、優れた光学性能(画素数、分解能)を有する。また、本発明の光学部品はリフロー半田付けにより基板実装するのに十分な耐熱性を有する接着剤で光学素子が接着固定されているため、レンズを別工程で実装する必要がなく、リフロー処理により一括して実装が可能であり、光学装置を効率よく、且つ低コストで製造することができる。
95重量%硫酸70g(0.68モル)と1,8-ジアザビシクロ[5.4.0]ウンデセン-7(DBU)55g(0.36モル)を撹拌混合して脱水触媒を調製した。
撹拌機、温度計、及び脱水管を備え且つ保温された留出配管を具備した3リットルのフラスコに、水添ビフェノール(=4,4’-ジヒドロキシビシクロヘキシル)1000g(5.05モル)、上記で調製した脱水触媒125g(硫酸として0.68モル)、プソイドクメン1500gを入れ、フラスコを加熱した。内温が115℃を超えたあたりから水の生成が確認された。さらに昇温を続けてプソイドクメンの沸点まで温度を上げ(内温:162~170℃)、常圧で脱水反応を行った。副生した水は留出させ、脱水管により系外に排出した。脱水触媒は反応条件下において液体であり、反応液中に微分散していた。3時間経過後、ほぼ理論量の水(180g)が留出したため反応終了とした。反応終了液を10段のオールダーショウ型の蒸留塔を用い、プソイドクメンを留去した後、内部圧力10Torr(1.33kPa)、内温137~140℃にて蒸留し、731gのビシクロヘキシル-3,3’-ジエンを得た。
過酢酸溶液滴下終了後、40℃で1時間熟成し反応を終了した。さらに30℃で反応終了時の粗液を水洗し、70℃/20mmHgで低沸点化合物の除去を行い、脂環式エポキシ化合物270gを得た。得られた脂環式エポキシ化合物のオキシラン酸素濃度は15.0重量%であった。また1H-NMRの測定では、δ4.5~5ppm付近の内部二重結合に由来するピークが消失し、δ3.1ppm付近にエポキシ基に由来するプロトンのピークの生成が確認された。そのため、脂環式エポキシ化合物は(3,4,3’,4’-ジエポキシ)ビシクロヘキシルであることが確認された。
5Lの反応器に水酸化ナトリウム(顆粒状)(499g、12.48モル)、及びトルエン(727mL)を加え、窒素置換した後に、テトラヒドロベンジルアルコール(420g、3.74モル)のトルエン(484mL)溶液を添加し、70℃で1.5時間熟成した。次いで、メタンスルホン酸テトラヒドロベンジル(419g、2.20モル)を添加し、3時間還流下で熟成させた後、室温まで冷却し、水(1248g)を加えて反応を停止し、分液した。分液した有機層を濃縮後、減圧蒸留を行うことにより無色透明液体のジテトラヒドロベンジルエーテルを得た(収率:85%)。
撹拌装置付きの容器に、表1に示す配合割合(単位:重量部)で、カチオン重合性化合物、光カチオン重合開始剤を投入し、4時間室温で撹拌して均一に混合した。得られた混合液に無機フィラーを添加し、ホモディスパー(商品名「ホモディスパー」、プライミクス(株)製)を使用して2時間撹拌した。撹拌を停止し、1時間静置して、光硬化性組成物を得、得られた光硬化性組成物について、以下の評価を行った。
光硬化性組成物の粘度(Pa・s)は、レオメーター(商品名「PHYSICA UDS200」、Anton Paar社製)を用いて、温度25℃、回転速度20/秒で測定した。
チクソトロピー性は、レオメーター(商品名「PHYSICA UDS200」、Anton Paar社製)を使用し、25℃において、回転速度を50/秒まで上昇させて、粘度が十分下がったことを確認してから回転速度を除々に落とし、せん断速度2(1/s)時の粘度とせん断速度20(1/s)時の粘度からTI値を下記式にて算出した。
TI値=[せん断速度2(1/s)時の粘度/せん断速度20(1/s)時の粘度]
10mLの遮光性シリンジ(商品名「UVブロックシリンジ」、武蔵エンジニアリング(株)製)に光硬化性組成物を充填し、ジェットディスペンサー(商品名「Aero Jet」、武蔵エンジニアリング(株)製)を用いてスライドグラス(商品名「S1112」、松浪硝子工業(株)製)に、塗布径(若しくは液滴径)の大きさが1.0mm±0.2mmになるように光硬化性組成物を塗布し、下記基準で評価した。
評価基準
○:塗布してから1分後の液滴高さが100μm以上であり、塗布してから10分後の液滴高さが1分後の液滴高さと比べて80%以上である
△:塗布してから1分後の液滴高さが100μm以上であり、塗布してから10分後の液滴高さが1分後の液滴高さと比べて50%以上、80%未満である
×:塗布してから1分後の液滴高さが100μm以上であり、塗布してから10分後の液滴高さが1分後の液滴高さと比べて50%未満であるか、又は塗布してから1分後の液滴高さが100μm未満である
ジェットディスペンサー(商品名「Aero Jet」、武蔵エンジニアリング(株)製)を使って、光硬化性組成物(直径:1.0mm、高さ:0.2mm)を塗布した後、紫外線照射装置(商品名「LC-8」、浜松ホトニクス(株)製)を使用して光硬化性組成物に光を照射(照射強度:50~100mW/cm、積算照射量:2500~5000mJ/cm2)して硬化した。光を照射してから30分後に得られた硬化物の表面を指で触って、下記基準で硬化性を評価した。
評価基準
○:表面にタック性がなく、硬化物の表面形状に変化がなかった
△:表面のタック性はないが、硬化物の表面形状が変化した
×:表面にタック性を有する
高圧水銀ランプ(商品名「LC-8」、浜松ホトニクス(株)製)に代えて、UV-LED(365nm)(商品名「ZUV-C20H」、オムロン(株)製)を使用した以外は[高圧水銀ランプによる硬化性]と同様にして硬化性を評価した。
ジェットディスペンサー(商品名「Aero Jet」、武蔵エンジニアリング(株)製)を使って、エポキシ樹脂の平板上に光硬化性組成物(直径:1.0mm、高さ:0.2mm)を塗布した。光硬化性組成物の厚みが100μmになるようにエポキシ樹脂の平板を重ね合わせて、紫外線照射装置(商品名「ZUV-C20H」、オムロン(株)製)を使用して光硬化性組成物に光を照射(照射強度:50~100mW/cm、積算照射量:2500~5000mJ/cm2)してサンプル(光硬化性組成物の硬化物/エポキシ樹脂の平板積層体)を得た。
得られたサンプルを引張・圧縮試験機(商品名「テンシロンRTF-1350」、エー・アンド・ディ社製)を用いて、光硬化性樹脂組成物の硬化物(直径:1.0mm、厚み:100μm)の垂直方向における接着強度(MPa)を測定して、初期接着力とした。また、接着力を測定する治具にサンプルをセットした時点で剥がれたり、セットできなかったサンプルは測定不能と表記した。
尚、エポキシ樹脂の平板としては、エポキシ樹脂(商品名「セロキサイド2021P」、(株)ダイセル製)にカチオン重合開始剤(商品名「サンエイド SI-100L」、三新化学(株)製)を0.5重量%添加して得られたエポキシ樹脂組成物をインプリント成型機(商品名「NANOIMPRINTER NM-0501」、明昌機工(株)製)を使用して150℃で15分間加熱して、硬化、成型、次いで離型し、更に予め150℃に熱したオーブンで30分間加熱してアニール処理を行って得られた平板(厚み:1.0mm)を使用した。
ジェットディスペンサー(商品名「Aero Jet」、武蔵エンジニアリング(株)製)を使って、光硬化性組成物をエポキシ樹脂の平板上に、四角形(5mm×5mm)の頂点にくるように4点に塗布した(塗布形状;直径:1.0mm、高さ:0.2mm、尚、実施例6では、塗布形状を直径:0.6mm、高さ:0.2mmに変更した)。
その後、光硬化性組成物の厚みが100μmになるようにエポキシ樹脂の平板を重ね合わせて、紫外線照射装置(商品名「ZUV-C20H」、オムロン(株)製)を使用して光硬化性組成物に光を照射(照射強度:50~100mW/cm、積算照射量:2500~5000mJ/cm2)してサンプル(エポキシ樹脂の平板/光硬化性組成物の硬化物/エポキシ樹脂の平板)を得た。
得られたサンプルにおける光硬化性組成物の硬化物の中心をダイシング刃が通るように四角形の4辺をカットして個片サンプルを得た。尚、ダイシング条件は以下の通りである。
ダイシング刃厚み:0.1mm
ダイシング速度:30mm/秒
ダイシング刃の回転速度:30000rpm
サンプル100個をダイシングした後、CCDカメラ(商品名「VH-Z20UR」、キーエンス(株)製)を使って、ダイシング面を観察し、光硬化性組成物の硬化物と平板との間に剥離や割れがないサンプルの個数を計測してダイシング適性を評価した。
上記[ダイシング前後の剥離や割れ]試験で得られた個片サンプル(5mm×5mm)を真上から見た際の、全体の面積を平板の面積とし、平板と光硬化性組成物の硬化物が接着している面積を接着面積として、平板における接着面積の割合を以下の式から算出した。
接着面積(%)=(光硬化性組成物の硬化物が接着している面積(mm2))/(平板の面積(mm2))×100
上記[初期接着力]の評価用サンプルと同じサンプルに、シンアペック社製卓上リフロー炉を使用して、JEDEC規格記載のリフロー温度プロファイル(最高温度:270℃)に基づく耐熱試験を連続して3回施した後、[初期接着力]と同様の方法により接着力を評価した。尚、耐熱試験後に剥離等が生じ、装置にセットできなくなったサンプルは測定不能と表記した。
<カチオン重合性化合物>
(a-1):製造例1により得られた(3,4,3’,4’-ジエポキシ)ビシクロヘキシル
(a-2):製造例2により得られたビス(3,4-エポキシシクロヘキシルメチル)エーテル
(b-1):3-エチル-3{[(3-エチルオキセタン-3-イル)メトキシ]メチル}オキセタン、商品名「アロンオキセタンOXT221」、東亞合成(株)製
PB3600:エポキシ化ポリブタジエン、重量平均分子量:5900、商品名「エポリード PB3600」、(株)ダイセル製
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<光カチオン重合開始剤>
(c-1):4-(フェニルチオ)フェニルジフェニルスルホニウム トリス(ペンタフルオロエチル)トリフルオロホスフェート
(c-2):[4-(4-ビフェニリルチオ)フェニル]-4-ビフェニリルフェニルスルホニウム トリス(ペンタフルオロエチル)トリフルオロホスフェート
(c-3):4-(フェニルチオ)フェニルジフェニルスルホニウム テトラキス(ペンタフルオロフェニル)ボレート
CPI-100P:4-(フェニルチオ)フェニルジフェニルスルホニウム ヘキサフルオロホスフェートのプロピレンカーボネート50%溶液、商品名「CPI-100P」、サンアプロ(株)製
<無機フィラー>
(d-1):親水性フュームドシリカ、比表面積(BET法):300±30m2/g、商品名「アエロジル300」、日本アエロジル(株)製
2 光学素子部
3 光学素子アレイ
4 光学素子用接着剤
5 光学素子アレイ積層体
6 ダイシング部
7 光学素子モジュール
8 光学素子用接着剤の硬化物
9a 上から見た光学素子モジュール積層体
9b 側面から見た光学素子モジュール積層体
Claims (24)
- 下記成分(A)、成分(B)、成分(C)、及び成分(D)を含む光硬化性組成物。
成分(A):脂環式エポキシ基を有し、且つエステル結合を有しないエポキシ化合物
成分(B):オキセタン化合物
成分(C):フッ化アルキル基が結合したリンを含むアニオン、又はホウ素を含むアニオンを有する光カチオン重合開始剤
成分(D):無機フィラー - 成分(B)の含有量が光硬化性組成物に含まれる全カチオン重合性化合物の5~40重量%である請求項1又は2に記載の光硬化性組成物。
- 成分(A)の含有量が光硬化性組成物に含まれる全カチオン重合性化合物の20~60重量%である請求項1~3の何れか1項に記載の光硬化性組成物。
- 成分(D)の含有量が光硬化性組成物全量の1~10重量%である請求項1~4の何れか1項に記載の光硬化性組成物。
- 成分(C)の光カチオン重合開始剤のアニオン部が、下記式(c-1)
[(Rf)sPF6-s]- (c-1)
(式中、Rfは水素原子の80%以上がフッ素原子で置換された炭素数1~4のアルキル基を示し、sは1~5の整数を示す)
で表されるアニオン、又は下記式(c-2)
[(R’f)tBF4-t]- (c-2)
(式中、R’fは水素原子の一部又は全部がフッ素原子で置換されたアリール基を示し、tは0~4の整数を示す)
で表されるアニオンである請求項1~5の何れか1項に記載の光硬化性組成物。 - 成分(D)がシリカである請求項1~6の何れか1項に記載の光硬化性組成物。
- 粘度[25℃、せん断速度20(1/s)における]が5~20Pa・s、且つ25℃におけるTI値[せん断速度2(1/s)時の粘度/せん断速度20(1/s)時の粘度]が2以上である請求項1~7の何れか1項に記載の光硬化性組成物。
- 請求項1~8の何れか1項に記載の光硬化性組成物を含む光学素子用接着剤。
- 請求項9に記載の光学素子用接着剤を被着体に塗布して、光を照射することを特徴とする光学部品の製造方法。
- 下記工程を有する請求項10に記載の光学部品の製造方法。
工程1:請求項9に記載の光学素子用接着剤を被着体としての光学素子アレイに塗布し、これを複数枚積層して光学素子アレイ積層体を製造する工程
工程2:光を照射して光学素子用接着剤を硬化させる工程
工程3:光学素子アレイ積層体をダイシングする工程 - 光学素子用接着剤の塗布を、ディスペンサーを使用して行う請求項10又は11に記載の光学部品の製造方法。
- 光学素子用接着剤の塗布を、スクリーン印刷により行う請求項10又は11に記載の光学部品の製造方法。
- 光照射をUV-LED(波長:350~400nm)を使用して行う請求項10~13の何れか1項に記載の光学部品の製造方法。
- 光照射の積算光量が5000mJ/cm2以下である請求項10~14の何れか1項に記載の光学部品の製造方法。
- 光学素子用接着剤の塗布厚が0.01~0.3mmである請求項10~15の何れか1項に記載の光学部品の製造方法。
- 工程1において、光学素子部と基板部からなる光学素子アレイの基板部に光学素子用接着剤を塗布する請求項11~16の何れか1項に記載の光学部品の製造方法。
- 被着体が、その構成材料にエポキシ樹脂を含有する請求項10~17の何れか1項に記載の光学部品の製造方法。
- 請求項10~18の何れか1項に記載の光学部品の製造方法により得られる光学部品。
- 光学素子用接着剤の硬化物が被着体と接する面積が、被着体表面積の2~50%である請求項19に記載の光学部品。
- 光学素子用接着剤の硬化物の厚みが0.01~0.3mmである請求項19又は20に記載の光学部品。
- 被着体が光学素子部と基板部からなる光学素子アレイであり、光学素子用接着剤の硬化物が光学素子アレイと接する面積が、光学素子部面積の2~50%である請求項19~21の何れか1項に記載の光学部品。
- 請求項19~22の何れか1項に記載の光学部品を備えた光学装置。
- 請求項19~22の何れか1項に記載の光学部品をリフロー半田付けにより基板実装して得られる光学装置。
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JP2016529379A JP6709730B2 (ja) | 2014-06-23 | 2015-06-16 | 光硬化性組成物、及びそれを含む光学素子用接着剤 |
KR1020167035639A KR20170023834A (ko) | 2014-06-23 | 2015-06-16 | 광 경화성 조성물 및 그것을 포함하는 광학 소자용 접착제 |
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WO2018062930A3 (ko) * | 2016-09-30 | 2018-08-09 | 주식회사 엘지화학 | 접착제 조성물 |
WO2018153985A1 (de) | 2017-02-22 | 2018-08-30 | Lohmann Gmbh & Co. Kg | Wickel- und stanzbarer klebender film |
WO2020031941A1 (ja) * | 2018-08-10 | 2020-02-13 | 三井化学株式会社 | 封止剤 |
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CN112851600B (zh) * | 2021-01-11 | 2022-10-04 | 江苏泰特尔新材料科技股份有限公司 | 一种高耐热双环氧化物的制备方法 |
CN115029089B (zh) * | 2022-06-06 | 2023-06-06 | 韦尔通科技股份有限公司 | 一种高Tg、高粘接、耐老化的环氧胶黏剂组合物及其制备方法和应用 |
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JP2012046673A (ja) | 2010-08-27 | 2012-03-08 | Nippon Shokubai Co Ltd | 光学用接着樹脂組成物 |
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KR20170023834A (ko) | 2017-03-06 |
CN106459381B (zh) | 2020-02-07 |
TWI677548B (zh) | 2019-11-21 |
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