WO2013099693A1 - 硬化性エポキシ樹脂組成物 - Google Patents
硬化性エポキシ樹脂組成物 Download PDFInfo
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- WO2013099693A1 WO2013099693A1 PCT/JP2012/082755 JP2012082755W WO2013099693A1 WO 2013099693 A1 WO2013099693 A1 WO 2013099693A1 JP 2012082755 W JP2012082755 W JP 2012082755W WO 2013099693 A1 WO2013099693 A1 WO 2013099693A1
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- acrylic polymer
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- 0 *C1(CN(C(N(CC2(*)OC2)C(N2CC(*)=C)=O)=O)C2=O)OC1 Chemical compound *C1(CN(C(N(CC2(*)OC2)C(N2CC(*)=C)=O)=O)C2=O)OC1 0.000 description 1
- DISSYNSLBWSJHH-UHFFFAOYSA-N CC(C1)CC=C(C)C1O Chemical compound CC(C1)CC=C(C)C1O DISSYNSLBWSJHH-UHFFFAOYSA-N 0.000 description 1
- FPQOQDFWCJXVKF-UHFFFAOYSA-N CC1CC(C)OCC1 Chemical compound CC1CC(C)OCC1 FPQOQDFWCJXVKF-UHFFFAOYSA-N 0.000 description 1
- ULPDSNLBZMHGPI-UHFFFAOYSA-N CC1CC2OC2CC1 Chemical compound CC1CC2OC2CC1 ULPDSNLBZMHGPI-UHFFFAOYSA-N 0.000 description 1
- YEJCHVFCLNKZPU-UHFFFAOYSA-N CC1COC(C)CC1 Chemical compound CC1COC(C)CC1 YEJCHVFCLNKZPU-UHFFFAOYSA-N 0.000 description 1
- HXTYAJYEZGMVNC-UHFFFAOYSA-N CCC1OCC(C)C1 Chemical compound CCC1OCC(C)C1 HXTYAJYEZGMVNC-UHFFFAOYSA-N 0.000 description 1
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- H10W74/47—
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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
- C08G59/20—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 epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
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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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- H10W76/47—
Definitions
- the present invention relates to a curable epoxy resin composition, a cured product obtained by curing the curable epoxy resin composition, and an optical semiconductor device in which an optical semiconductor element is sealed with a cured product of the curable epoxy resin composition About.
- a liquid alicyclic epoxy resin having an alicyclic skeleton such as an adduct of cyclohexanecarboxylate and ⁇ -caprolactone and 1,2,8,9-diepoxylimonene is known.
- the cured products of these alicyclic epoxy resins are vulnerable to various stresses, and cracks occur when a thermal shock such as a cooling cycle (repeating heating and cooling periodically) is applied. Etc. had occurred.
- an optical semiconductor device for example, a surface-mount type optical semiconductor device
- a reflow process for joining the electrodes of the optical semiconductor device to a wiring board by soldering.
- lead-free solder having a high melting point has been used as a solder as a bonding material, and the heat treatment in the reflow process has become a higher temperature (for example, the peak temperature is 240 to 260 ° C.).
- the peak temperature is 240 to 260 ° C.
- the sealing material in the optical semiconductor device has high heat resistance and light resistance, and also has a characteristic that a crack is not easily generated even when a thermal shock is applied (sometimes referred to as “thermal shock resistance”), and Further, there is a demand for characteristics in which cracks and peeling are unlikely to occur even when heat treatment is performed in the reflow process.
- thermal shock resistance sometimes referred to as “thermal shock resistance”
- high humidity conditions for example, 168 hours under conditions of 30 ° C. and 70% RH; under conditions of 60 ° C. and 60% RH
- moisture absorption reflow resistance this characteristic is sometimes referred to as “moisture absorption reflow resistance”.
- an object of the present invention is to provide a curable epoxy resin composition that provides a cured product having high heat resistance, light resistance, and thermal shock resistance, and particularly excellent in moisture absorption reflow resistance.
- Another object of the present invention is to provide a cured product having high heat resistance, light resistance, and thermal shock resistance, and particularly excellent in moisture absorption reflow resistance.
- Another object of the present invention is to provide an optical semiconductor device in which deterioration such as a decrease in luminous intensity is suppressed, and in particular, a decrease in luminous intensity is suppressed when heated in a reflow process after being stored under high humidity conditions. It is in.
- a curable epoxy resin composition containing a specific amount of an alicyclic epoxy compound and a specific core-shell type polymer particle and having a specific viscosity has a high heat resistance.
- the present invention has been completed by finding that a cured product having excellent heat resistance, light resistance, and thermal shock resistance, and particularly excellent in moisture absorption and reflow resistance can be formed.
- the present invention includes an alicyclic epoxy compound and core-shell acrylic polymer particles having a solubility parameter (Fedors method) of 19.5 to 21.5 [MPa 1/2 ], and the core-shell acrylic polymer
- the glass transition temperature of the acrylic polymer constituting the particle core is 60 to 120 ° C.
- the glass transition temperature of the acrylic polymer constituting the shell is 60 to 120 ° C.
- the content of the core-shell type acrylic polymer particles is Provided is a curable epoxy resin composition having a viscosity of 1 to 30 parts by weight with respect to 100 parts by weight of the formula epoxy compound and a viscosity at 25 ° C. of 60 to 6000 mPa ⁇ s.
- R 1 and R 2 are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- the said alicyclic epoxy compound provides the said curable epoxy resin composition which is a compound represented by following formula (1).
- X represents a monovalent organic group.
- the curable epoxy resin composition is provided in which the alicyclic epoxy compound is a compound represented by the following formula (2-1).
- the curable epoxy resin composition containing a curing agent and a curing accelerator or a curing catalyst is provided.
- the present invention also provides a cured product obtained by curing the curable epoxy resin composition.
- the said curable epoxy resin composition which is a resin composition for optical semiconductor sealing is provided.
- the present invention also provides an optical semiconductor device in which an optical semiconductor element is sealed with a cured product of the curable epoxy resin composition.
- the curable epoxy resin composition of the present invention Since the curable epoxy resin composition of the present invention has the above-described configuration, by curing the resin composition, it has high heat resistance, light resistance, and thermal shock resistance, and particularly excellent in moisture absorption reflow resistance. A cured product can be formed. For this reason, when the curable epoxy resin composition of the present invention is used as a resin composition for encapsulating an optical semiconductor, the luminous intensity is lowered even when it is heat-treated in a reflow process after being stored under a high humidity condition. It is difficult to obtain a high-quality optical semiconductor device.
- the left figure (a) is a perspective view
- the right figure (b) is a sectional view. It is an example of the surface temperature profile (temperature profile in one heating of two heatings) in the luminous intensity maintenance factor measurement after the reflow of an Example.
- the curable epoxy resin composition of the present invention has an alicyclic epoxy compound, a solubility parameter (Fedors method) of 19.5 to 21.5 [MPa 1/2 ], and a glass transition temperature of an acrylic polymer constituting the core.
- the resin composition contains at least core-shell type acrylic polymer particles having a glass transition temperature of 60 to 120 ° C. and a glass transition temperature of the acrylic polymer constituting the shell of 60 to 120 ° C.
- the alicyclic epoxy compound that is an essential component of the curable epoxy resin composition of the present invention is a compound having at least an alicyclic (aliphatic ring) structure and an epoxy group in the molecule (in one molecule).
- Specific examples of the alicyclic epoxy compound include (i) a compound having an epoxy group composed of two adjacent carbon atoms and oxygen atoms constituting the alicyclic ring, and (ii) an alicyclic ring. Examples include compounds in which an epoxy group is directly bonded by a single bond.
- the compound having an epoxy group (alicyclic epoxy group) composed of two adjacent carbon atoms and oxygen atoms constituting the alicyclic ring (i) is arbitrarily selected from known or commonly used compounds. Can be used. Especially, as said alicyclic epoxy group, a cyclohexene oxide group is preferable.
- the compound having an epoxy group composed of two adjacent carbon atoms and oxygen atoms constituting the alicyclic ring (i) described above the following formula having a cyclohexene oxide group, particularly from the viewpoint of transparency and heat resistance:
- the compound (alicyclic epoxy compound) represented by (1) is preferable.
- X represents a monovalent organic group.
- the monovalent organic group include a hydrocarbon group (monovalent hydrocarbon group), an alkoxy group, an alkenyloxy group, an aryloxy group, an aralkyloxy group, an acyloxy group, an alkylthio group, an alkenylthio group, and an arylthio group.
- hydrocarbon group examples 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 an alkyl group, an alkenyl group, and an alkynyl group.
- Examples of the alkyl group include C 1-20 alkyl groups such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a hexyl group, an octyl group, an isooctyl group, a decyl group, and a dodecyl group.
- alkenyl group examples include a vinyl group, allyl group, methallyl group, 1-propenyl group, isopropenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, 1-pentenyl group, 2-pentenyl group, C 2-20 alkenyl groups such as 3-pentenyl group, 4-pentenyl group, 5-hexenyl group and the like can be mentioned.
- alkynyl group examples include C 2-20 alkynyl groups such as ethynyl group and propynyl group.
- Examples of the alicyclic hydrocarbon group include a C 3-12 cycloalkyl group such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclododecyl group; a C 3-12 cyclo group such as a cyclohexenyl group.
- An alkenyl group; a C 4-15 bridged cyclic hydrocarbon group such as a bicycloheptanyl group and a bicycloheptenyl group.
- C6-14 aryl groups (especially C6-10 aryl group), such as a phenyl group and a naphthyl group, etc. are mentioned, for example.
- Examples of the group in which the aliphatic hydrocarbon group and the alicyclic hydrocarbon group are bonded include a cyclohexylmethyl group and a methylcyclohexyl group.
- Examples of the group in which the aliphatic hydrocarbon group and the aromatic hydrocarbon group are bonded include, for example, a C 7-18 aralkyl group such as a benzyl group and a phenethyl group, and a C 6-10 aryl-C 2-6 alkenyl such as a cinnamyl group.
- C 1-4 alkyl-substituted aryl groups such as a tolyl group and C 2-4 alkenyl-substituted aryl groups such as a styryl group.
- the hydrocarbon group may have a substituent.
- the number of carbon atoms of the substituent in the hydrocarbon group is not particularly limited, but is preferably 0 to 20, more preferably 0 to 10.
- the substituent include halogen atoms such as fluorine atom, chlorine atom, bromine atom and iodine atom; hydroxyl group; alkoxy group such as methoxy group, ethoxy group, propoxy group, isopropyloxy group, butoxy group and isobutyloxy group (Especially C 1-6 alkoxy group); alkenyloxy group such as allyloxy group (particularly C 2-6 alkenyloxy group); C 1-4 alkyl on aromatic ring such as phenoxy group, tolyloxy group, naphthyloxy group, etc.
- An arylthio group (particularly a C 6-14 arylthio group) optionally having a substituent such as aralkylthio group (particularly a C 7-18 aralkylthio group) such as a benzylthio group or a phenethylthio group; a carboxyl group; methoxycarbonyl group, ethoxycarbonyl group, propoxycarbonyl group, butoxycarbonyl alkoxycarbonyl group such as a group (in particular, C 1-6 alkoxy - Carbonyl group); phenoxycarbonyl group, a tolyl group, an aryloxycarbonyl group such as a naphthyloxycarbonyl group (particularly, C 6-14 aryloxy - carbonyl group); aralkyloxycarbonyl group such as benzyloxycarbonyl group (especially, C 7-18 aralkyloxy - carbonyl group); an amino group; methylamino group, ethyla
- a compound represented by the following formula (2) (alicyclic epoxy compound) is particularly preferable from the viewpoint of heat resistance and light resistance of the cured product.
- Y represents a single bond or a linking group (a divalent group having one or more atoms).
- the linking group include a divalent hydrocarbon group, a carbonyl group, an ether bond, an ester bond, a carbonate group, an amide group, and a group in which a plurality of these groups are linked (for example, a carbonyloxy group).
- Examples of the alicyclic epoxy compound in which Y in the formula (2) is a single bond include 3,4,3 ′, 4′-diepoxybicyclohexane ((3,3 ′, 4,4′-diepoxy) Bicyclohexyl).
- a commercial item can also be used as such an alicyclic epoxy compound.
- Examples of the divalent hydrocarbon group include a linear or branched alkylene group having 1 to 18 carbon atoms and a divalent alicyclic hydrocarbon group.
- Examples of the linear or branched alkylene group having 1 to 18 carbon atoms include a methylene group, a methylmethylene group, a dimethylmethylene group, an ethylene group, a propylene group, and a trimethylene group.
- Examples of the divalent alicyclic hydrocarbon group include 1,2-cyclopentylene group, 1,3-cyclopentylene group, cyclopentylidene group, 1,2-cyclohexylene group, 1,3-cyclohexene group.
- divalent cycloalkylene groups including cycloalkylidene groups
- linking group Y a linking group containing an oxygen atom is particularly preferable.
- divalent hydrocarbon group include those exemplified above.
- Typical examples of the alicyclic epoxy compound represented by the above formula (2) include compounds represented by the following formulas (2-1) to (2-10).
- R in the following formula (2-5) is an alkylene group having 1 to 8 carbon atoms, such as a methylene group, an ethylene group, a propylene group, an isopropylene group, a butylene group, an isobutylene group, an s-butylene group, or a pentylene group.
- a linear or branched alkylene group such as a hexylene group, a heptylene group, and an octylene group.
- linear or branched alkylene groups having 1 to 3 carbon atoms such as a methylene group, an ethylene group, a propylene group, and an isopropylene group are preferable.
- N1 to n6 in the following formulas (2-9) and (2-10) each represents an integer of 1 to 30.
- Examples of the alicyclic epoxy compounds represented by the above formulas (2-1) to (2-10) include commercial products such as trade names “Celoxide 2021P” and “Celoxide 2081” (manufactured by Daicel Corporation). Can also be used.
- Examples of the compound (ii) in which the epoxy group is directly bonded to the alicyclic ring with a single bond include a compound represented by the following formula (3).
- R ′ is a group obtained by removing p —OH from a p-valent alcohol, and p and n represent natural numbers.
- the p-valent alcohol [R ′-(OH) p ] include polyhydric alcohols such as 2,2-bis (hydroxymethyl) -1-butanol (alcohols having 1 to 15 carbon atoms, etc.).
- p is preferably 1 to 6, and n is preferably 1 to 30.
- n in each () (in parentheses) may be the same or different.
- the alicyclic epoxy compound may be used alone or in combination of two or more.
- the alicyclic epoxy compound 3,4-epoxycyclohexylmethyl (3,4-epoxy) cyclohexanecarboxylate represented by the above formula (2-1), trade name “Celoxide 2021P” (Corporation) Daicel) is particularly preferable.
- content (blending amount) of the alicyclic epoxy compound in the curable epoxy resin composition of the present invention is not particularly limited, the total amount of the compound having an epoxy group contained in the curable epoxy resin composition (total epoxy compound).
- the amount is preferably 50 to 100% by weight, more preferably 60 to 100% by weight, still more preferably 70 to 100% by weight, and particularly preferably 80 to 100% by weight with respect to 100% by weight. If content of an alicyclic epoxy compound is less than 50 weight%, the heat resistance of a hardened
- the core-shell type acrylic polymer particle which is an essential component of the curable epoxy resin composition of the present invention, has a core-shell structure comprising a core and a single-layer or multi-layer shell layer (shell) covering the core, and the core
- the shell layer is a polymer particle composed of an acrylic polymer (a polymer having an acrylic monomer as an essential monomer component).
- the curable epoxy resin composition of the present invention can form a cured product having excellent handling properties at room temperature and excellent moisture absorption resistance by containing the above core-shell type acrylic polymer particles.
- the acrylic polymer constituting the core of the core-shell type acrylic polymer particle is “acrylic polymer (C)”, and the acrylic polymer constituting the core of the core-shell type acrylic polymer particle is “acrylic polymer (S)”. May be called. Although it does not specifically limit in the said core-shell type acrylic polymer particle, It is preferable that an acrylic polymer (C) and an acrylic polymer (S) have a different composition.
- the solubility parameter ( ⁇ ) at 25 ° C. calculated by the Fedors method of the core-shell type acrylic polymer particles is 19.5 to 21.5 [MPa 1/2 ],
- the pressure is preferably 19.7 to 21.3 [MPa 1/2 ], more preferably 20.0 to 21.0 [MPa 1/2 ].
- solubility parameter (Fedors method) of the core-shell type acrylic polymer particles is less than 19.5 [MPa 1/2 ] , the compatibility with the alicyclic epoxy compound is reduced, the heat resistance of the cured product, and the moisture absorption resistance Reflow property and thermal shock resistance are reduced.
- a monomer resulting from a high solubility parameter has a hydrophilic functional group (for example, carboxyl group or nitrile group). Reflowability tends to decrease.
- the solubility parameter (Fedors method) of the core-shell type acrylic polymer particles is calculated by, for example, calculating the solubility parameter (Fedors method) of acrylic polymer (C) and acrylic polymer (S), respectively, and calculating a weighted average thereof. Can do.
- the solubility parameter (Fedors method) of the core-shell type acrylic polymer particles is controlled by the composition of the monomers constituting the core-shell type acrylic polymer particles.
- the glass transition temperature of the acrylic polymer (C) is 60 to 120 ° C., preferably 70 to 110 ° C., more preferably 80 to 100 ° C.
- cured material falls that the glass transition temperature of an acrylic polymer (C) is less than 60 degreeC.
- the glass transition temperature of the acrylic polymer (C) exceeds 120 ° C., for example, there are many monomer components (for example, (meth) acrylic acid, etc.) that contribute to a high glass transition temperature, so that the cured product has moisture absorption resistance. Reflowability may be reduced.
- the glass transition temperature of the acrylic polymer (C) means a calculated value calculated by the following Fox equation (see Bull. Am. Phys.
- Tg is the glass transition temperature of the acrylic polymer (unit: K) indicates
- W i represents the weight fraction of the monomer i for the monomer total amount constituting the acrylic polymer.
- Tg i is the glass transition temperature of the homopolymer of monomer i (unit: K) shows a.
- the glass transition temperature of the homopolymer values described in various documents can be adopted, for example, values described in “POLYMER HANDBOOK 3rd edition” (published by John Wiley & Sons, Inc.) can be adopted. In addition, about the thing which is not described in literature, the value of the glass transition temperature measured by DSC of the homopolymer obtained by superposing
- the glass transition temperature of the acrylic polymer (C) is controlled by the composition of the monomers constituting the acrylic polymer (C).
- the glass transition temperature of the acrylic polymer (S) is 60 to 120 ° C., preferably 70 to 115 ° C.
- cured material falls that the glass transition temperature of an acrylic polymer (S) is less than 60 degreeC.
- the glass transition temperature of the acrylic polymer (S) exceeds 120 ° C., for example, there are many monomer components (for example, (meth) acrylic acid, etc.) that contribute to a high glass transition temperature, so the moisture absorption resistance of the cured product In some cases, the reflowability may decrease, and the long-term storage stability may deteriorate due to thickening or the like.
- the glass transition temperature of the acrylic polymer (S) means a value calculated by the above Fox equation, and can be calculated in the same manner as the glass transition temperature of the acrylic polymer (C).
- the glass transition temperature of acrylic polymer (S) is controlled by the composition of the monomer which comprises acrylic polymer (S).
- Difference between glass transition temperature of acrylic polymer (C) and glass transition temperature of acrylic polymer (S) in the above-mentioned core-shell type acrylic polymer particles [glass transition temperature of acrylic polymer (S) ⁇ glass transition temperature of acrylic polymer (C)] Is not particularly limited, but is preferably ⁇ 5 to 60 ° C., more preferably 0 to 55 ° C.
- the acrylic polymer (C) and the acrylic polymer (S) are acrylic polymers each composed of an acrylic monomer (acrylic monomer) as an essential monomer component.
- acrylic monomer constituting the acrylic polymer (C) and the acrylic polymer (S) examples include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, (meth) ) I-propyl acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate, n- (meth) acrylate Heptyl, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-nonyl (meth) acrylate, i-nonyl (meth) acrylate, decyl (meth) acrylate, (meth) acrylic acid (Meth) acrylic acid alkyl esters such as dodecyl, stearyl (meth)
- monomers other than acrylic monomers can be used in combination.
- the monomer other than the acrylic monomer include aromatic vinyl monomers such as styrene, ⁇ -methylstyrene, and vinyl toluene; vinyl cyanide monomers such as acrylonitrile and methacrylonitrile; crotonic acid , Monomers having a carboxyl group such as itaconic acid, fumaric acid and maleic acid; vinyl monomers such as vinyl pyridine, vinyl alcohol, vinyl imidazole, vinyl pyrrolidone, vinyl acetate and 1-vinyl imidazole; monomethyl itaconate, mono Itaconic esters such as ethyl itaconate, monopropyl itaconate, monobutyl itaconate, dimethyl itaconate, diethyl itaconate, dipropyl itaconate, dibutyl itaconate; monomethyl fumarate,
- the monomer constituting the acrylic polymer (C) and acrylic polymer (S) is a polyfunctional monomer having two or more polymerizable functional groups (for example, an aliphatic carbon-carbon double bond).
- the body can also be used.
- the polyfunctional monomer include divinylbenzene, allyl (meth) acrylate, ethylene glycol di (meth) acrylate, diallyl maleate, triallyl cyanurate, diallyl phthalate, butylene glycol diacrylate, and the like.
- the ratio of the acrylic monomer to the total amount (100% by weight) of the monomer constituting the acrylic polymer (C) is not particularly limited, but is preferably 70 to 100% by weight.
- the acrylic polymer (C) is a polymer composed substantially only of acrylic monomers (for example, a polymer having a ratio of acrylic monomers to 98 to 100% by weight based on the total amount of monomers).
- the monomer constituting the acrylic polymer (C) is preferably a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms, more preferably methyl methacrylate, butyl acrylate or methacrylic acid. Butyl.
- the ratio of the acrylic monomer to the total amount (100% by weight) of the monomer constituting the acrylic polymer (S) is not particularly limited, but is preferably 70 to 100% by weight.
- the acrylic polymer (S) is a polymer composed substantially only of acrylic monomers (for example, a polymer having a ratio of acrylic monomers to 98 to 100% by weight based on the total amount of monomers). It is preferable that As the monomer constituting the acrylic polymer (S), (meth) acrylic acid alkyl ester having 1 to 4 carbon atoms and (meth) acrylic acid are preferable, and methyl methacrylate is more preferable. They are butyl acrylate, butyl methacrylate, and methacrylic acid.
- the core-shell type acrylic polymer particle is a polymer substantially composed of only an acrylic monomer (for example, the ratio of the acrylic monomer to the total amount of monomers constituting the core-shell type acrylic polymer particle)
- the polymer is preferably a core-shell type acrylic polymer particle formed by a polymer having a weight ratio of 98 to 100% by weight.
- the monomer When a large amount of vinyl cyanide monomer such as (meth) acrylonitrile is used as a monomer constituting the acrylic polymer (C) and the acrylic polymer (S), the monomer has high polarity, so that it is cured. This is not preferable because the moisture absorption reflow resistance of the product tends to decrease.
- an aromatic vinyl monomer such as styrene, ⁇ -methylstyrene, vinyltoluene or the like is used as a monomer constituting the acrylic polymer (C) or the acrylic polymer (S)
- the cured product is colored. Since it becomes easy, it is not preferable.
- the ratio of the vinyl cyanide monomer and the aromatic vinyl monomer to the total amount (100% by weight) of the monomer constituting the acrylic polymer (C) (or acrylic polymer (S)) is 5% by weight.
- the following is preferable, more preferably 2% by weight or less, and it is particularly preferable that it is not substantially contained (not actively blended as a monomer component).
- the core-shell type acrylic polymer particles preferably do not contain butadiene rubber from the viewpoint of suppressing coloring and deterioration of the cured product. Moreover, it is preferable that the said core-shell type acrylic polymer particle does not contain silicone rubber from a viewpoint of compatibility or cost.
- the ratio (weight ratio) of the acrylic polymer (C) to the acrylic polymer (S) in the core-shell type acrylic polymer particles (acrylic polymer (C) / acrylic polymer (S)) is not particularly limited, but is 1 / 0.1 to 1/200 is preferable, more preferably 1 / 0.3 to 1/120, still more preferably 1 / 0.4 to 1/10.
- the ratio of the acrylic polymer (C) and the acrylic polymer (S) is out of the above range, it is difficult to obtain the effect of improving the adhesion to the adherend described later and quickly increasing the viscosity by heating, and as a result, a curable epoxy resin.
- the effect of improving the handleability of the composition and improving the moisture absorption reflow resistance of the cured product may not be obtained.
- an alkyl ester having a C 1-4 alkyl group is used as an essential monomer component.
- Examples thereof include core-shell type acrylic polymer particles having a glass transition temperature of 60 to 120 ° C.
- the acrylic polymer (S) further includes a monomer having a hydroxyl group (for example, a (meth) acrylic acid ester having a hydroxyl group) and / or a monomer having a carboxyl group (for example, (meth) acrylic acid). It is preferably contained as a monomer component.
- the shell may be a single layer or a multilayer.
- the ratio of the alkyl methacrylate having 1 to 4 carbon atoms to the total amount (100% by weight) of the monomer component constituting the acrylic polymer (C) is preferably 60% by weight or more, more preferably 80%. % By weight or more.
- the ratio of the alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms to the total amount (100% by weight) of the monomer component constituting the acrylic polymer (S) is preferably 60% by weight or more, more preferably. Is 80% by weight or more.
- the content of alkali metal ions (for example, Na ions, K ions, etc.) in the core-shell type acrylic polymer particles is not particularly limited, but is preferably 10 ppm or less, more preferably 5 ppm or less, and still more preferably 1 ppm or less. If the content of alkali metal ions exceeds 10 ppm, the insulating properties of the cured product may be deteriorated.
- the content of the alkali metal ions can be measured using, for example, an ICP emission analyzer or ion chromatography.
- content of the said alkali metal ion can be controlled by selection of the polymerization initiator and emulsifier used for superposition
- the average secondary particle diameter of the core-shell type acrylic polymer particles is not particularly limited, but is preferably 5 to 50 ⁇ m. When the average secondary particle size is less than 5 ⁇ m, it is easy to fly and static electricity easily occurs, which may be difficult to handle. On the other hand, if the average secondary particle diameter exceeds 50 ⁇ m, there may be a large time load when dispersed in the primary particles.
- the said average secondary particle diameter can be measured using electron microscopes, such as a scanning electron microscope (SEM) and a transmission electron microscope (TEM), for example.
- SEM scanning electron microscope
- TEM transmission electron microscope
- the average secondary particle diameter can be controlled by, for example, granulation conditions, drying conditions (temperature, air volume), and the like.
- the volume average primary particle diameter (Dv) of the core-shell type acrylic polymer particles is not particularly limited, but is preferably 200 nm or more, and more preferably 500 nm or more. Further, the volume average primary particle diameter of the core-shell type acrylic polymer particles is preferably 8 ⁇ m or less, more preferably 5 ⁇ m or less, and further preferably 1 ⁇ m or less. If the volume average primary particle diameter is less than 200 nm, the dispersibility may decrease. On the other hand, if the volume average primary particle diameter exceeds 8 ⁇ m, the transparency of the cured product may be lowered.
- the volume average primary particle size can be measured using, for example, a laser diffraction / scattering particle size distribution analyzer (for example, trade name “LA-910W”, manufactured by Horiba, Ltd.).
- the said volume average primary particle diameter can be controlled by the conditions at the time of emulsification of a monomer, etc., for example.
- the monodispersity of the core-shell type acrylic polymer particles is not particularly limited, but is preferably 3.0 or less, more preferably 2 0.0 or less, more preferably 1.5 or less.
- Dv / Dn exceeds 3.0, the moisture absorption reflow resistance and thermal shock resistance of the cured product may decrease.
- the Dv / Dn can be measured using, for example, a laser diffraction / scattering particle size distribution analyzer (for example, trade name “LA-910W”, manufactured by Horiba, Ltd.).
- the Dv / Dn can be controlled by, for example, the conditions during the emulsification of the monomer.
- the core-shell type acrylic polymer particles can be produced by using a known or conventional method for producing core-shell type polymer particles.
- the core-shell type acrylic polymer particles can be obtained by coating the core with a shell.
- the core-shell type acrylic polymer particles can be obtained by coating the surface of the core with an acrylic polymer constituting the shell, or using the acrylic polymer constituting the core as a trunk component. Examples thereof include a method of graft polymerization of an acrylic polymer (branch component) constituting the shell. More specifically, the core-shell type acrylic polymer particles can be produced, for example, according to the method disclosed in International Publication 2010/090246.
- the core-shell type acrylic polymer particles can be used alone or in combination of two or more.
- commercially available products such as trade names “METABBRENE KP-0917”, “METABBRENE KP-0930”, “METABBRENE KP-0950” (manufactured by Mitsubishi Rayon Co., Ltd.) are used. You can also.
- the content (blending amount) of the core-shell type acrylic polymer particles is 1 to 30 parts by weight, preferably 3 to 20 parts by weight with respect to 100 parts by weight of the alicyclic epoxy compound.
- the content of the core-shell type acrylic polymer particles is less than 1 part by weight, the effect of adding the core-shell type acrylic polymer particles is difficult to obtain, and the moisture absorption reflow resistance and thermal shock resistance of the cured product become poor.
- the content of the core-shell type acrylic polymer particles exceeds 30 parts by weight, the curable epoxy resin composition is thickened and handling is not easy.
- the curable epoxy resin composition of the present invention containing the alicyclic epoxy compound and the core-shell type acrylic polymer particles as essential components has high heat resistance, light resistance, and thermal shock resistance, and in particular, moisture absorption reflow resistance. Gives a cured product with excellent properties. These effects in the cured product (especially the effect of improving moisture absorption reflow resistance) are that the core-shell type acrylic polymer particles in the curable epoxy resin composition have a core-shell structure, and the glass transition temperature and solubility of the core and shell. By controlling the parameters within a specific range, the adhesion of cured products to adherends (especially silver electrodes in optical semiconductor devices, etc.) is improved. ) And the shape is presumed to be retained (fixed) before being completely cured.
- the above-described adhesive improvement and thickening effect by heating cannot be obtained.
- the resin composition that is remarkably reduced in viscosity by heating is easily deformed in shape, it is liable to cause defects (for example, reduced moisture absorption reflow resistance) due to such deformation.
- the curable epoxy resin composition of the present invention containing the core-shell type acrylic polymer particles has a relatively low viscosity at room temperature as described later, it is excellent in handleability.
- the above-described thickening effect of the curable epoxy resin composition by heating is particularly high when the core-shell type acrylic polymer is heated (particularly around the Tg of the core or shell, specifically at 80 to 90 ° C.). And the core-shell acrylic polymer particles in which the alicyclic epoxy compound is swollen (surface) by controlling the solubility parameter (Fedors method) of the core-shell acrylic polymer to a specific range. This is presumed to be an effect obtained by being able to easily penetrate the layer.
- the curable epoxy resin composition of the present invention preferably further contains a compound represented by the following formula (I) (monoallyl diglycidyl isocyanurate compound).
- a compound represented by the following formula (I) monoallyl diglycidyl isocyanurate compound.
- R 1 and R 2 are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- the alkyl group having 1 to 8 carbon atoms include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, pentyl, hexyl, heptyl, octyl and the like. Examples thereof include a chain or branched alkyl group. Of these, a linear or branched alkyl group having 1 to 3 carbon atoms such as a methyl group, an ethyl group, a propyl group, and an isopropyl group is preferable.
- R 1 and R 2 in the above formula (I) are particularly preferably hydrogen atoms.
- monoallyl diglycidyl isocyanurate compound examples include monoallyl diglycidyl isocyanurate, 1-allyl-3,5-bis (2-methylepoxypropyl) isocyanurate, 1- (2-methylpropenyl) -3,5-diglycidyl isocyanurate, 1- (2-methylpropenyl) -3,5-bis (2-methylepoxypropyl) isocyanurate, and the like.
- a monoallyl diglycidyl isocyanurate compound can be used individually by 1 type or in combination of 2 or more types.
- the monoallyl diglycidyl isocyanurate compound may be modified in advance by adding a compound that reacts with an epoxy group, such as alcohol or acid anhydride.
- the content (blending amount) of the monoallyl diglycidyl isocyanurate compound is not particularly limited, but is preferably 3 to 50 parts by weight, more preferably 5 to 45 parts by weight with respect to 100 parts by weight of the alicyclic epoxy compound. More preferably, it is 10 to 40 parts by weight.
- the content of the monoallyl diglycidyl isocyanurate compound exceeds 50 parts by weight, the solubility of the monoallyl diglycidyl isocyanurate compound in the curable epoxy resin composition is lowered, and the physical properties of the cured product may be adversely affected. .
- the content of the monoallyl diglycidyl isocyanurate compound is less than 3 parts by weight, the moisture absorption reflow resistance and thermal shock resistance of the cured product may be insufficient.
- the curable epoxy resin composition of the present invention may further contain a curing agent and a curing accelerator or a curing catalyst.
- the curing agent in the curable epoxy resin composition of the present invention is a compound having a function of curing a compound having an epoxy group.
- curing agent a well-known thru
- acid anhydrides that are liquid at 25 ° C. are preferable, and examples thereof include methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, dodecenyl succinic anhydride, and methylendomethylenetetrahydrophthalic anhydride. .
- solid acid anhydrides at room temperature such as phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylcyclohexene dicarboxylic acid anhydride are liquid at room temperature (about 25 ° C.). It can be used as a curing agent in the present invention by dissolving in an acid anhydride to form a liquid mixture.
- curing agent can be used individually by 1 type or in combination of 2 or more types.
- anhydride of a saturated monocyclic hydrocarbon dicarboxylic acid an alkyl group or the like in the ring. And those having the substituents bonded thereto are preferred.
- the content (blending amount) of the curing agent is not particularly limited, but is 50 to 200 parts by weight with respect to the total amount (100 parts by weight) of the compound having an epoxy group contained in the curable epoxy resin composition of the present invention. And more preferably 100 to 145 parts by weight. More specifically, it is preferably used in a ratio of 0.5 to 1.5 equivalents per 1 equivalent of epoxy groups in all compounds having an epoxy group contained in the curable epoxy resin composition of the present invention. .
- curing agent is less than 50 weight part, hardening will become inadequate and there exists a tendency for the toughness of hardened
- the curing accelerator in the curable epoxy resin composition of the present invention is a compound having a function of accelerating the curing rate when a compound having an epoxy group is cured by the curing agent.
- the curing accelerator known or commonly used curing accelerators can be used.
- DBU 1,8-diazabicyclo [5.4.0] undecene-7
- salts thereof for example, phenol salts
- Octylate p-toluenesulfonate, formate, tetraphenylborate salt
- salts thereof eg, phenol salt, octyl
- Acid salt p-toluenesulfonate, formate, tetraphenylborate salt
- tertiary amines such as benzyldimethylamine, 2,4,6-tris (dimethylaminomethyl) phenol, N, N-dimethylcyclohexylamine
- Imidazoles such as 2-ethyl-4-methylimidazole and 1-cyanoethyl-2-ethyl-4-methylimidazole
- phosphoric acid Ester phosphines such as triphenylphosphin
- the content (blending amount) of the curing accelerator is not particularly limited, but is 0.05 to 5 parts by weight with respect to the total amount (100 parts by weight) of the epoxy group-containing compound contained in the curable epoxy resin composition. More preferred is 0.1 to 3 parts by weight, still more preferred is 0.2 to 3 parts by weight, and particularly preferred is 0.25 to 2.5 parts by weight. If the content of the curing accelerator is less than 0.05 parts by weight, the curing acceleration effect may be insufficient. On the other hand, when content of a hardening accelerator exceeds 5 weight part, hardened
- a curing catalyst can be used instead of the above-mentioned curing agent and curing accelerator.
- a curing catalyst by using a curing catalyst, the curing reaction of the compound having an epoxy group can be advanced to obtain a cured product.
- the cationic catalyst cationic polymerization initiator which generate
- a curing catalyst can be used individually by 1 type or in combination of 2 or more types.
- Examples of the cation catalyst that generates cation species by ultraviolet irradiation include hexafluoroantimonate salt, pentafluorohydroxyantimonate salt, hexafluorophosphate salt, and hexafluoroarsenate salt.
- cationic catalyst examples include trade names “UVACURE1590” (manufactured by Daicel Cytec Co., Ltd.), trade names “CD-1010”, “CD-1011”, “CD-1012” (above, manufactured by Sartomer, USA), Commercial products such as trade name “Irgacure 264” (manufactured by Ciba Japan Co., Ltd.) and trade name “CIT-1682” (manufactured by Nippon Soda Co., Ltd.) can also be preferably used.
- Examples of the cation catalyst that generates cation species by heat treatment include aryldiazonium salts, aryliodonium salts, arylsulfonium salts, allene-ion complexes, and the like, and trade names “PP-33”, “ CP-66 ”,“ CP-77 ”(manufactured by ADEKA Corporation), trade name“ FC-509 ”(manufactured by 3M), trade name“ UVE1014 ”(manufactured by GE), trade name“ Sun-Aid SI ” -60L "," Sun Aid SI-80L “,” Sun Aid SI-100L “,” Sun Aid SI-110L “(manufactured by Sanshin Chemical Industry Co., Ltd.), trade name” CG-24-61 "(Ciba Japan) (Commercially available products) can be preferably used.
- a chelate compound of a metal such as aluminum or titanium and a acetoacetate or diketone compound and a silanol such as triphenylsilanol or a chelate compound of a metal such as aluminum or titanium and acetoacetate or diketone and bisphenol S
- a chelate compound of a metal such as aluminum or titanium and acetoacetate or diketone and bisphenol S
- the compound with phenols, such as these may be sufficient.
- the content (blending amount) of the curing catalyst is not particularly limited, but is 0.01 to 15 parts by weight with respect to the total amount (100 parts by weight) of the compound having an epoxy group contained in the curable epoxy resin composition.
- the amount is preferably 0.01 to 12 parts by weight, more preferably 0.05 to 10 parts by weight, and particularly preferably 0.1 to 10 parts by weight.
- the curable epoxy resin composition of the present invention may further contain a glycidyl ether epoxy compound having no aromatic ring in addition to the alicyclic epoxy compound as an epoxy compound.
- the inclusion of the glycidyl ether-based epoxy compound having no aromatic ring is preferable because it can improve the crack resistance without impairing the high heat resistance of the cured product, and in particular, the high heat resistance and light resistance of the cured product. It is preferable at the point which can improve crack resistance, without impairing.
- the glycidyl ether-based epoxy compound having no aromatic ring includes an aliphatic glycidyl ether-based epoxy compound and a compound obtained by hydrogenating an aromatic glycidyl ether-based epoxy compound.
- Examples of the glycidyl ether-based epoxy compound having no aromatic ring include, for example, trade names “EPICLON 703”, “EPICLON 707”, “EPICLON 720”, “EPICLON 725” (manufactured by DIC Corporation), trade names “YH-300”, “ “YH-315”, “YH-324”, “PG-202”, “PG-207”, “Santoto ST-3000” (manufactured by Nippon Steel Chemical Co., Ltd.), trade names “Rikaresin DME-100”, “ Jamaica Resin HBE-100 (manufactured by Shin Nippon Rika Co., Ltd.), trade names “Denacol EX-212”, “Denacol EX-321” (manu
- the content (blending amount) of the glycidyl ether-based epoxy compound having no aromatic ring is not particularly limited, but is 100% by weight based on the total amount of the compound having an epoxy group (total epoxy compound) contained in the curable epoxy resin composition.
- the content is preferably 10 to 70% by weight, more preferably 20 to 50% by weight.
- the curable epoxy resin composition of the present invention may contain a polyol compound.
- the inclusion of the polyol compound is preferable in that the heat resistance and crack resistance of the cured product can be further improved.
- the polyol compound is a polymer (oligomer or polymer) having a number average molecular weight of 200 or more having two or more hydroxyl groups in the molecule (in one molecule).
- the said polyol compound can be used individually by 1 type or in combination of 2 or more types.
- polyester polyol examples include, for example, trade names "Placcel 205", “Placcel 205H”, “Placcel 205U”, “Placcel 205BA”, “Placcel 208", "Placcel 210", “Placcel 210CP”, “Placcel 210BA”, “Placcel 212”, “Plaxel 212CP”, “Plaxel 220”, “Plaxel 220CPB”, “Plaxel 220NP1”, “Plaxel 220BA”, “Plaxel 220ED”, “Plaxel 220EB”, “Plaxel 220EC”, “Plaxel 230”, “Plaxel 230CP”, “Plaxel 240”, “Plaxel 240CP”, “Plaxel 210N”, “Plaxel 220N”, “Plaxel L205AL”, “Plaxel L208” L, Plaxel L212AL, Plaxel L220AL, Plaxel L230AL, Plaxel 305, Plaxe
- polyether polyol examples include trade name “PEP-101” (manufactured by Freund Sangyo Co., Ltd.), trade names “Adeka Pluronic L”, “Adeka Pluronic P”, “Adeka Pluronic F”, “Adeka Pluronic R”.
- polycarbonate polyol examples include, for example, trade names “Placcel CD205PL”, “Plaxel CD205HL”, “Plaxel CD210PL”, “Plaxel CD210HL”, “Plaxel CD220PL”, “Plaxel CD220HL” (manufactured by Daicel Corporation) Names “UH-CARB50”, “UH-CARB100”, “UH-CARB300”, “UH-CARB90 (1/3)”, “UH-CARB90 (1/1)”, “UC-CARB100” (and above, Ube) Products manufactured by Kosan Co., Ltd.), trade names such as “PCDL T4671”, “PCDL T4672”, “PCDL T5650J”, “PCDL T5651”, “PCDL T5652” (above, manufactured by Asahi Kasei Chemicals) be able to
- polyol compounds other than the polyether polyol, polyester polyol, and polycarbonate polyol may be used.
- examples of the other polyol compounds include trade names “YP-50”, “YP-50S”, “YP-55U”, “YP-70”, “ZX-1356-2”, “YPB-43C”, “YPB-43M”, “FX-316”, “FX-310T40”, “FX-280S”, “FX-293”, “YPS-007A30”, “TX-1016” (Nippon Steel Chemical Co., Ltd.
- Phenoxy resins such as “jER1256”, “jER4250”, “jER4275” (manufactured by Mitsubishi Chemical Corporation); trade names “Epototo YD-014”, “Epototo YD-017”, “Epototo” “YD-019”, “Epototo YD-020G”, “Epototo YD-904", “Epototo YD-907”, “Epototo YD-6020” Epoxy equivalents such as “JER1007”, “jER1009”, “jER1010”, “jER1005F”, “jER1009F”, “jER1006FS”, “jER1007FS” (above, manufactured by Mitsubishi Chemical Corporation) Is 1000 g / eq.
- the content (blending amount) of the polyol compound is not particularly limited, but is 1 to 50 parts by weight with respect to 100 parts by weight of the total amount of compounds having an epoxy group (total epoxy compound) contained in the curable epoxy resin composition. More preferred is 1.5 to 40 parts by weight, still more preferred is 5 to 30 parts by weight.
- the content of the polyol compound exceeds 50 parts by weight, the Tg of the cured product is excessively lowered, the volume change due to heating is increased, and problems such as non-lighting of the optical semiconductor device may occur.
- the content of the polyol compound is less than 1 part by weight, the heat resistance and light resistance of the cured product may be insufficient.
- the curable epoxy resin composition of the present invention may contain rubber particles.
- rubber particles include particulate NBR (acrylonitrile-butadiene rubber), reactive terminal carboxyl group NBR (CTBN), metal-free NBR, particulate SBR (styrene-butadiene rubber), and the like.
- the rubber particles include rubber particles having a multilayer structure (core-shell structure) composed of a core portion having rubber elasticity and at least one shell layer covering the core portion.
- the rubber particles having the core-shell structure have hydroxyl groups and / or carboxyl groups as functional groups capable of reacting with an alicyclic epoxy compound on the surface, an average particle size of 10 to 500 nm, and a maximum particle size of 50.
- the difference between the refractive index of the rubber particles and the refractive index of the cured product of the curable epoxy resin composition containing the rubber particles is within ⁇ 0.02.
- the blending amount of the rubber particles can be appropriately adjusted as necessary, and is not particularly limited, but is 0 with respect to the total amount (100 parts by weight) of the compound having an epoxy group contained in the curable epoxy resin composition.
- the amount is preferably 5 to 30 parts by weight, more preferably 1 to 20 parts by weight. If the amount of rubber particles used is less than 0.5 parts by weight, the crack resistance of the cured product tends to be reduced. On the other hand, if the amount of rubber particles used exceeds 30 parts by weight, the heat resistance and transparency of the cured product are reduced. Tend to decrease.
- the curable epoxy resin composition of the present invention may contain various additives as long as the effects of the present invention are not impaired.
- a compound having a hydroxyl group such as ethylene glycol, diethylene glycol, propylene glycol, or glycerin
- the reaction can be allowed to proceed slowly.
- Other silane coupling agents such as silicone-based and fluorine-based antifoaming agents, leveling agents, ⁇ -glycidoxypropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane as long as the viscosity and transparency are not impaired.
- the curable epoxy resin composition of the present invention is not particularly limited, but can be prepared by stirring and mixing each of the above components in a heated state as necessary.
- the curable epoxy resin composition of the present invention can be used as a one-component composition in which components mixed in advance are used as they are, for example, two or more stored separately. These components can also be used as a multi-liquid composition (for example, a two-liquid system) that is used by mixing them at a predetermined ratio before use.
- the viscosity of the curable epoxy resin composition of the present invention at 25 ° C. is 60 to 6000 mPa ⁇ s, preferably 100 to 5500 mPa ⁇ s, more preferably 150 to 5000 mPa ⁇ s.
- the viscosity of the curable epoxy resin composition at 25 ° C. is 60 to 6000 mPa ⁇ s, preferably 100 to 5500 mPa ⁇ s, more preferably 150 to 5000 mPa ⁇ s.
- a cured product having excellent heat resistance, light resistance, and thermal shock resistance, and particularly excellent in moisture absorption reflow resistance can be obtained.
- the heating temperature (curing temperature) during curing is not particularly limited, but is preferably 45 to 200 ° C, more preferably 100 to 190 ° C, and still more preferably 100 to 180 ° C.
- the heating time (curing time) for curing is not particularly limited, but is preferably 30 to 600 minutes, more preferably 45 to 540 minutes, and further preferably 60 to 480 minutes. When the curing temperature and the curing time are lower than the lower limit value in the above range, curing is insufficient.
- the resin component may be decomposed.
- the curing conditions depend on various conditions, for example, when the curing temperature is increased, the curing time can be shortened, and when the curing temperature is decreased, the curing time can be appropriately increased.
- the curable epoxy resin composition of the present invention can be preferably used as a resin composition for optical semiconductor encapsulation.
- a device is obtained. Even if the above optical semiconductor device is provided with a high-output, high-brightness optical semiconductor element, the light intensity is unlikely to decrease with time, especially when it is heated in a reflow process after being stored under high humidity conditions. However, deterioration such as a decrease in luminous intensity is unlikely to occur.
- the optical semiconductor device of the present invention is an optical semiconductor device in which an optical semiconductor element is sealed with a cured product of the curable epoxy resin composition (resin composition for optical semiconductor sealing) of the present invention.
- the optical semiconductor element is sealed by injecting the curable epoxy resin composition prepared by the above-described method into a predetermined mold and heat-curing under predetermined conditions. Thereby, the optical semiconductor device with which the optical semiconductor element was sealed with the hardened
- the curing temperature and the curing time can be set in the same range as at the time of preparing the cured product.
- the curable epoxy resin composition of the present invention can be preferably used as a sealant used in a mode of being cured after pouring into a certain space.
- the curable epoxy resin composition of the present invention is cured even in a case where a load due to high temperature (for example, thermal history in a reflow process) or thermal shock (for example, cooling / heating cycle) is applied after curing in the above-described fixed space. This is because the effect of hardly causing peeling or cracking can be exhibited. Therefore, the curable epoxy resin composition of the present invention is particularly preferably used as a sealing agent for forming a PLCC sealing material for LEDs, an inner sealing material for bullet-type LEDs, a flip chip sealing material, and the like. be able to.
- the curable epoxy resin composition of the present invention is not limited to the above-mentioned optical semiconductor element sealing application, for example, an adhesive, an electrical insulating material, a laminate, a coating, an ink, a paint, a sealant, a resist, a composite material, It can also be used for applications such as transparent substrates, transparent sheets, transparent films, optical elements, optical lenses, optical members, optical modeling, electronic paper, touch panels, solar cell substrates, optical waveguides, light guide plates, holographic memories, etc. .
- a mixture (M1) was prepared, 10% of the monomer mixture (M1) was charged into the flask, and then heated to 80 ° C. in a nitrogen atmosphere. Next, an aqueous solution of 0.30 g of ammonium persulfate prepared in advance (dissolved in 15.0 g of ion exchange water) was charged all at once into the flask and held for 60 minutes to form seed particles. Further, the remaining monomer mixture (M1) was dropped into the flask in which the seed particles were formed over 180 minutes, and the mixture was held for 1 hour after the dropping, thereby completing the first stage polymerization.
- the glass transition temperature of the core component formed by the first stage polymerization is 90.6 ° C.
- the solubility parameter (Fedors method) is 20.45
- the glass transition temperature of the shell component formed by the second stage polymerization is 106.9 ° C.
- the solubility parameter (Fedors method) is 20.66.
- the obtained acrylic polymer emulsion (E1) was spray-dried to obtain an acrylic polymer powder (P1).
- Production Examples 2-6 Acrylic polymer emulsions (E2) to (E6) and acrylic polymer powders (P2) to (P6) were prepared in the same manner as in Production Example 1 except that the raw material compositions and polymerization conditions shown in Table 1 were changed. Obtained.
- Production Example 7 Manufacture of acrylic polymer emulsion (E7) and acrylic polymer powder (P7) 624 g of ion-exchanged water was charged into a 2 liter separable flask equipped with a stirrer, a reflux condenser, a dropping pump, a temperature controller, and a nitrogen introduction tube, and stirred. Separately, 483.7 g of methyl methacrylate and 76.3 g of n-butyl methacrylate were mixed to prepare a monomer mixture (M7) used for the first stage polymerization. 40.0 g of the monomer mixture (M7) was charged into the flask, and then heated to 80 ° C. in a nitrogen atmosphere.
- E7 acrylic polymer emulsion
- P7 acrylic polymer powder
- an aqueous solution of 0.32 g of ammonium persulfate prepared in advance (dissolved in 16.0 g of ion exchange water) was charged all at once into the flask and held for 60 minutes to form seed particles. Further, 520.0 g of the remaining monomer mixture (M7), 5.6 g of ammonium di-2-ethylhexylsulfosuccinate, and 280.0 g of ion-exchanged water were homogenizer (25000 rpm) in the flask in which the seed particles were formed. The mixture obtained by the emulsification treatment was added dropwise over 210 minutes and held for 1 hour to complete the first stage polymerization.
- the glass transition temperature of the core component formed by the first stage polymerization is 90.6 ° C.
- the solubility parameter (Fedors method) is 20.45
- the glass transition temperature of the shell component formed by the second stage polymerization is 106.9 ° C.
- the solubility parameter (Fedors method) is 20.66.
- the obtained acrylic polymer emulsion (E7) was spray-dried to obtain an acrylic polymer powder (P7).
- Production Example 8 Manufacture of acrylic polymer emulsion (E8) and acrylic polymer powder (P8)
- E8 acrylic polymer emulsion
- P8 acrylic polymer powder
- an aqueous solution of 0.30 g of ammonium persulfate prepared in advance (dissolved in 15.0 g of ion exchange water) was charged all at once into the flask and held for 60 minutes to form seed particles. Further, the remaining monomer mixture (M8) was dropped into the flask in which the seed particles were formed over 270 minutes, held for 1 hour after dropping, the polymerization was terminated, and the average particle size was 0.62 ⁇ m.
- An acrylic polymer emulsion (E8) was obtained. From the composition of the acrylic monomer in the acrylic polymer emulsion (E8), the glass transition temperature is 95.3 ° C., and the solubility parameter (Fedors method) is 20.52. The obtained acrylic polymer emulsion (E8) was spray-dried to obtain an acrylic polymer powder (P8).
- Example 1 100 parts by weight of an alicyclic epoxy compound (trade name “Celoxide 2021P”, manufactured by Daicel Corporation) and 10 parts by weight of an acrylic polymer powder (P1) were mixed into a self-revolving stirrer (trade name “Noritaro Awatori” AR-250 "(manufactured by Shinky Co., Ltd.) was mixed uniformly and defoamed to obtain agent A.
- an alicyclic epoxy compound trade name “Celoxide 2021P”, manufactured by Daicel Corporation
- P1 acrylic polymer powder
- 100 is a reflector (light reflecting resin composition)
- 101 is a metal wiring
- 102 is an optical semiconductor element
- 103 is a bonding wire
- 104 is a cured product (sealing material).
- Examples 2 to 14 and Comparative Examples 1 to 8 A curable epoxy resin composition was prepared in the same manner as in Example 1 except that the compositions of Agent A and Agent B were changed to the compositions shown in Tables 2 and 3. In addition, an optical semiconductor device was fabricated in the same manner as in Example 1. As shown in Tables 2 and 3, in Example 2 and Comparative Example 2, B agent was not used as a constituent component of the curable epoxy resin composition, and only A agent was used.
- the total luminous fluxes of the optical semiconductor devices (10 used for each curable epoxy resin composition) obtained in the examples and comparative examples were measured using a total luminous flux measuring instrument (referred to as “initial total luminous flux”). Furthermore, the optical semiconductor device was placed in a condition of 30 ° C. and 70% RH for 168 hours to absorb moisture, then placed in a reflow furnace and heated under the following heating conditions. Thereafter, the optical semiconductor device was taken out in a room temperature environment and allowed to cool, and then placed in a reflow furnace again and heated under the same conditions. That is, in this test, the thermal history under the following heating conditions was given twice to the optical semiconductor device.
- FIG. 2 shows an example of the surface temperature profile of the optical semiconductor device during heating in the reflow furnace (temperature profile in one of the two heating operations). Thereafter, the total luminous flux of the optical semiconductor device was measured (referred to as “total luminous flux after reflow”).
- Luminance maintenance rate (%) 100 ⁇ (total luminous flux after reflow (lm)) / (initial total luminous flux (lm))
- MMA Methyl methacrylate n-BMA: n-butyl methacrylate BA: n-butyl acrylate i-BMA: i-butyl methacrylate
- MAA methacrylic acid
- HEMA 2-hydroxyethyl methacrylate
- MA-DGIC monoallyl diglycidyl isocyanurate, manufactured by Shikoku Chemicals Co., Ltd.
- Celoxide 3000 1,2,8,9- Diepoxy limonene, manufactured by Daicel Corporation
- YD-128 bisphenol A type epoxy resin, manufactured by Nippon Steel Chemical Co., Ltd.
- Z-6040 silane coupling agent, manufactured by Toray Dow Corning Co., Ltd., SI-100L (Sun Aid SI) -100L): Ally Sulfonium salt, MH-700F (Rikasid MH-700F) manufactured by Sanshin Chemical Industry Co., Ltd .: Curing agent, U-CAT 18XD: Curing accelerator manufactured by Shin Nippon Chemical Co., Ltd. Ethylene glycol: Jun Wako Pure Made by Yakuhin Co., Ltd.
- Test equipment Resin curing oven Espec Co., Ltd. GPHH-201 -Thermostatic chamber ESPEC Co., Ltd. Small high temperature chamber ST-120B1 ⁇ Total luminous flux measuring machine Optronic Laboratories Multi-spectral Radiation Measurement System OL771 ⁇ Thermal shock tester Espec Co., Ltd. Small thermal shock device TSE-11-A ⁇ Reflow furnace manufactured by Nippon Antom Co., Ltd., UNI-5016F
- the curable epoxy resin composition of the present invention is an optical semiconductor sealing resin composition (particularly for forming a PLCC sealing material for LEDs, an inner sealing material for bullet-type LEDs, a flip chip sealing material, etc.) It can be preferably used as a sealing agent.
- the curable epoxy resin composition of the present invention includes, for example, an adhesive, an electrical insulating material, a laminate, a coating, an ink, a paint, a sealant, a resist, a composite material, a transparent substrate, a transparent sheet, a transparent film, and an optical element.
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Abstract
Description
また、本発明の他の目的は、高い耐熱性、耐光性、及び耐熱衝撃性を有し、特に、耐吸湿リフロー性に優れた硬化物を提供することにある。
また、本発明の他の目的は、光度低下等の劣化が抑制され、特に高湿条件下で保管された後にリフロー工程で加熱された場合の光度低下が抑制された光半導体装置を提供することにある。
本発明の硬化性エポキシ樹脂組成物は、脂環式エポキシ化合物と、溶解度パラメータ(Fedors法)が19.5~21.5[MPa1/2]、コアを構成するアクリルポリマーのガラス転移温度が60~120℃、シェルを構成するアクリルポリマーのガラス転移温度が60~120℃であるコアシェル型アクリルポリマー粒子とを少なくとも含有する樹脂組成物である。
本発明の硬化性エポキシ樹脂組成物の必須成分である脂環式エポキシ化合物は、分子内(1分子内)に脂環(脂肪族環)構造とエポキシ基とを少なくとも有する化合物である。上記脂環式エポキシ化合物としては、具体的には、例えば、(i)脂環を構成する隣接する2つの炭素原子と酸素原子とで構成されるエポキシ基を有する化合物、(ii)脂環にエポキシ基が直接単結合で結合している化合物などが挙げられる。
本発明の硬化性エポキシ樹脂組成物の必須成分であるコアシェル型アクリルポリマー粒子は、コアと、該コアを被覆する単層又は多層のシェル層(シェル)とからなるコアシェル構造を有し、上記コア及びシェル層がともにアクリルポリマー(アクリル系単量体を必須の単量体成分とする重合体)により構成されたポリマー粒子である。本発明の硬化性エポキシ樹脂組成物は、後述のように、上記コアシェル型アクリルポリマー粒子を含有することにより、特に、室温での取り扱い性に優れ、耐吸湿性に優れた硬化物を形成できる。
1/Tg=W1/Tg1+W2/Tg2+・・・・+Wn/Tgn
上記単独重合体のガラス転移温度は、各種文献に記載の値を採用することができ、例えば、「POLYMER HANDBOOK 第3版」(John Wiley & Sons,Inc.発行)に記載の値を採用できる。なお、文献に記載のないものについては、単量体を常法により重合して得られる単独重合体のDSCにより測定されるガラス転移温度の値を採用することができる。
本発明の硬化性エポキシ樹脂組成物は、さらに、下記式(I)で表される化合物(モノアリルジグリシジルイソシアヌレート化合物)を含むことが好ましい。上記モノアリルジグリシジルイソシアヌレート化合物を含む場合、特に、硬化物の耐吸湿リフロー性及び耐熱衝撃性がいっそう向上する傾向がある。
本発明の硬化性エポキシ樹脂組成物における硬化剤は、エポキシ基を有する化合物を硬化させる働きを有する化合物である。上記硬化剤としては、エポキシ樹脂用硬化剤として公知乃至慣用の硬化剤を使用することができる。上記硬化剤としては、中でも、25℃で液状の酸無水物が好ましく、例えば、メチルテトラヒドロ無水フタル酸、メチルヘキサヒドロ無水フタル酸、ドデセニル無水コハク酸、メチルエンドメチレンテトラヒドロ無水フタル酸などが挙げられる。また、例えば、無水フタル酸、テトラヒドロ無水フタル酸、ヘキサヒドロ無水フタル酸、メチルシクロヘキセンジカルボン酸無水物などの常温(約25℃)で固体状の酸無水物は、常温(約25℃)で液状の酸無水物に溶解させて液状の混合物とすることで、本発明における硬化剤として使用することができる。なお、硬化剤は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。上述のように、上記硬化剤としては、硬化物の耐熱性、耐光性、耐クラック性(クラックを生じにくい特性)の観点で、飽和単環炭化水素ジカルボン酸の無水物(環にアルキル基等の置換基が結合したものも含む)が好ましい。
本発明の硬化性エポキシ樹脂組成物における硬化促進剤は、エポキシ基を有する化合物が硬化剤により硬化する際に、硬化速度を促進する機能を有する化合物である。上記硬化促進剤としては、公知乃至慣用の硬化促進剤を使用することができ、例えば、1,8-ジアザビシクロ[5.4.0]ウンデセン-7(DBU)、及びその塩(例えば、フェノール塩、オクチル酸塩、p-トルエンスルホン酸塩、ギ酸塩、テトラフェニルボレート塩);1,5-ジアザビシクロ[4.3.0]ノネン-5(DBN)、及びその塩(例えば、フェノール塩、オクチル酸塩、p-トルエンスルホン酸塩、ギ酸塩、テトラフェニルボレート塩);ベンジルジメチルアミン、2,4,6-トリス(ジメチルアミノメチル)フェノール、N,N-ジメチルシクロヘキシルアミンなどの3級アミン;2-エチル-4-メチルイミダゾール、1-シアノエチル-2-エチル-4-メチルイミダゾールなどのイミダゾール類;リン酸エステル、トリフェニルホスフィンなどのホスフィン類;テトラフェニルホスホニウムテトラ(p-トリル)ボレートなどのホスホニウム化合物;オクチル酸スズ、オクチル酸亜鉛などの有機金属塩;金属キレートなどが挙げられる。硬化促進剤は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。
本発明の硬化性エポキシ樹脂組成物においては、上述の硬化剤及び硬化促進剤の代わりに、硬化触媒を用いることもできる。硬化剤及び硬化促進剤を用いた場合と同様に、硬化触媒を用いることによって、エポキシ基を有する化合物の硬化反応を進行させ、硬化物を得ることができる。上記硬化触媒としては、特に限定されないが、紫外線照射又は加熱処理を施すことによりカチオン種を発生して、重合を開始させるカチオン触媒(カチオン重合開始剤)を用いることができる。なお、硬化触媒は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。
本発明の硬化性エポキシ樹脂組成物は、エポキシ化合物として上記脂環式エポキシ化合物以外にも、さらに、芳香環を有しないグリシジルエーテル系エポキシ化合物を含んでいてもよい。上記芳香環を有しないグリシジルエーテル系エポキシ化合物を含むことは、硬化物の高い耐熱性を損なうことなく耐クラック性を向上させることができる点で好ましく、特に、硬化物の高い耐熱性及び耐光性を損なうことなく耐クラック性を向上させることができる点で好ましい。
本発明の硬化性エポキシ樹脂組成物は、ポリオール化合物を含んでいてもよい。上記ポリオール化合物を含むことは、硬化物の耐熱性及び耐クラック性をより向上させることができる点で好ましい。上記ポリオール化合物は、分子内(一分子中)に2個以上の水酸基を有する数平均分子量が200以上の重合体(オリゴマー又はポリマー)であり、例えば、ポリエーテルポリオール、ポリエステルポリオール、ポリカーボネートポリオール等が含まれる。なお、上記ポリオール化合物は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。
本発明の硬化性エポキシ樹脂組成物は、ゴム粒子を含んでいてもよい。ゴム粒子としては、例えば、粒子状NBR(アクリロニトリル-ブタジエンゴム)、反応性末端カルボキシル基NBR(CTBN)、メタルフリーNBR、粒子状SBR(スチレン-ブタジエンゴム)等が挙げられる。また、上記ゴム粒子としては、例えば、ゴム弾性を有するコア部分と、該コア部分を被覆する少なくとも1層のシェル層とからなる多層構造(コアシェル構造)を有するゴム粒子などが挙げられる。上記コアシェル構造を有するゴム粒子としては、特に、表面に脂環式エポキシ化合物と反応し得る官能基としてヒドロキシル基及び/又はカルボキシル基を有し、平均粒子径が10~500nm、最大粒子径が50~1000nmであり、該ゴム粒子の屈折率と該ゴム粒子を含む硬化性エポキシ樹脂組成物の硬化物の屈折率との差が±0.02以内であるものが好ましい。上記ゴム粒子の配合量は、必要に応じて適宜調整することができ、特に限定されないが、硬化性エポキシ樹脂組成物に含まれるエポキシ基を有する化合物の全量(100重量部)に対して、0.5~30重量部が好ましく、より好ましくは1~20重量部である。ゴム粒子の使用量が0.5重量部を下回ると、硬化物の耐クラック性が低下する傾向があり、一方、ゴム粒子の使用量が30重量部を上回ると、硬化物の耐熱性及び透明性が低下する傾向がある。
本発明の硬化性エポキシ樹脂組成物は、上記以外にも、本発明の効果を損なわない範囲内で各種添加剤を含有していてもよい。上記添加剤として、例えば、エチレングリコール、ジエチレングリコール、プロピレングリコール、グリセリンなどの水酸基を有する化合物を使用すると、反応を緩やかに進行させることができる。その他にも、粘度や透明性を損なわない範囲内で、シリコーン系やフッ素系消泡剤、レベリング剤、γ-グリシドキシプロピルトリメトキシシランや3-メルカプトプロピルトリメトキシシランなどのシランカップリング剤、界面活性剤、シリカ、アルミナなどの無機充填剤、難燃剤、着色剤、酸化防止剤、紫外線吸収剤、イオン吸着体、顔料、蛍光体、離型剤などの慣用の添加剤を使用することができる。
本発明の硬化性エポキシ樹脂組成物を硬化させることにより、耐熱性、耐光性、及び耐熱衝撃性に優れ、特に、耐吸湿リフロー性に優れた硬化物を得ることができる。硬化の際の加熱温度(硬化温度)は、特に限定されないが、45~200℃が好ましく、より好ましくは100~190℃、さらに好ましくは100~180℃である。また、硬化の際に加熱する時間(硬化時間)は、特に限定されないが、30~600分が好ましく、より好ましくは45~540分、さらに好ましくは60~480分である。硬化温度と硬化時間が上記範囲の下限値より低い場合は、硬化が不十分となり、逆に上記範囲の上限値より高い場合は、樹脂成分の分解が起きる場合があるので、いずれも好ましくない。硬化条件は種々の条件に依存するが、例えば、硬化温度を高くした場合は硬化時間を短く、硬化温度を低くした場合は硬化時間を長くする等により、適宜調整することができる。
本発明の硬化性エポキシ樹脂組成物は、光半導体封止用樹脂組成物として好ましく使用できる。上記光半導体封止用樹脂組成物として用いることにより、高い耐熱性、耐光性、及び耐熱衝撃性を有し、特に耐吸湿リフロー性に優れた硬化物により光半導体素子が封止された光半導体装置が得られる。上記光半導体装置は、高出力、高輝度の光半導体素子を備える場合であっても、経時で光度が低下しにくく、特に、高湿条件下で保管された後にリフロー工程にて加熱された場合でも光度低下等の劣化が生じにくい。
本発明の光半導体装置は、本発明の硬化性エポキシ樹脂組成物(光半導体封止用樹脂組成物)の硬化物により光半導体素子が封止された光半導体装置である。光半導体素子の封止は、上述の方法で調製した硬化性エポキシ樹脂組成物を所定の成形型内に注入し、所定の条件で加熱硬化して行う。これにより、硬化性エポキシ樹脂組成物の硬化物により光半導体素子が封止された光半導体装置が得られる。硬化温度と硬化時間は、硬化物の調製時と同様の範囲で設定することができる。
(アクリル重合体エマルション(E1)、アクリル重合体粉体(P1)の製造)
攪拌機、還流冷却管、滴下ポンプ、温度制御装置、及び窒素導入管を備えた2リットルのセパラブルフラスコにイオン交換水585.0gを仕込み、攪拌を行った。
別途、メタクリル酸メチル453.5g、メタクリル酸n-ブチル71.5g、ジ-2-エチルヘキシルスルホコハク酸アンモニウム5.25g、及びイオン交換水262.5gをホモジナイザー(25000rpm)で乳化処理して単量体混合物(M1)を調製し、該単量体混合物(M1)のうちの10%を上記フラスコ内に投入し、その後、窒素雰囲気下で80℃に昇温した。次いで、予め調製した過硫酸アンモニウム0.30gの水溶液(イオン交換水15.0gに溶解させた)を、上記フラスコ内に一括仕込みし、60分間保持して、シード粒子を形成させた。さらに、シード粒子が形成された上記フラスコ内に残りの単量体混合物(M1)を180分かけて滴下し、滴下後1時間保持し、第1段目の重合を終了した。
次いで、メタクリル酸メチル219.3g、メタクリル酸5.7g、ジ-2-エチルヘキシルスルホコハク酸アンモニウム2.25g、及びイオン交換水112.5gをホモジナイザー(25000rpm)で乳化処理して得られた単量体混合物を、上記フラスコ内に90分かけて滴下し、滴下後1時間保持して、第2段目の重合を終了し、平均粒子径0.84μmのアクリル重合体エマルション(E1)を得た。上記アクリル重合体エマルション(E1)におけるアクリルモノマーの組成から、第1段目の重合により形成したコア成分のガラス転移温度は90.6℃、溶解度パラメータ(Fedors法)は20.45であり、第2段目の重合により形成したシェル成分のガラス転移温度は106.9℃、溶解度パラメータ(Fedors法)は20.66である。
得られたアクリル重合体エマルション(E1)を噴霧乾燥処理し、アクリル重合体粉体(P1)を得た。
表1に記載の原料組成及び重合条件に変更したこと以外は製造例1と同様にして、アクリル重合体エマルション(E2)~(E6)、及びアクリル重合体粉体(P2)~(P6)を得た。
(アクリル重合体エマルション(E7)、アクリル重合体粉体(P7)の製造)
攪拌機、還流冷却管、滴下ポンプ、温度制御装置、及び窒素導入管を備えた2リットルのセパラブルフラスコにイオン交換水624gを仕込み、攪拌を行った。
別途、メタクリル酸メチル483.7g、メタクリル酸n-ブチル76.3gを混合し、第1段目の重合に用いる単量体混合物(M7)を調製した。上記単量体混合物(M7)のうちの40.0gを上記フラスコ内に投入し、その後、窒素雰囲気下で80℃に昇温した。次いで、予め調製した過硫酸アンモニウム0.32gの水溶液(イオン交換水16.0gに溶解させた)を、上記フラスコ内に一括仕込みし、60分間保持して、シード粒子を形成させた。さらに、シード粒子が形成された上記フラスコ内に、残りの単量体混合物(M7)520.0g、ジ-2-エチルヘキシルスルホコハク酸アンモニウム5.6g、及びイオン交換水280.0gをホモジナイザー(25000rpm)で乳化処理して得られた混合物を210分かけて滴下し、1時間保持して、第1段目の重合を終了した。
次いで、上記フラスコ内に、メタクリル酸メチル233.9g、メタクリル酸6.1g、ジ-2-エチルヘキシルスルホコハク酸アンモニウム2.4g、及びイオン交換水120.0gをホモジナイザー(25000rpm)で乳化処理して得られた単量体混合物を90分かけて滴下し、滴下後1時間保持して、第2段目の重合を終了し、平均粒子径0.81μmのアクリル重合体エマルション(E7)を得た。上記アクリル重合体エマルション(E7)におけるアクリルモノマーの組成から、第1段目の重合により形成したコア成分のガラス転移温度は90.6℃、溶解度パラメータ(Fedors法)は20.45であり、第2段目の重合により形成したシェル成分のガラス転移温度は106.9℃、溶解度パラメータ(Fedors法)は20.66である。
得られたアクリル重合体エマルション(E7)を噴霧乾燥処理し、アクリル重合体粉体(P7)を得た。
(アクリル重合体エマルション(E8)、アクリル重合体粉体(P8)の製造)
攪拌機、還流冷却管、滴下ポンプ、温度制御装置、及び窒素導入管を備えた2リットルのセパラブルフラスコにイオン交換水585.0gを仕込み、攪拌を行った。
別途、メタクリル酸メチル672.75g、メタクリル酸n-ブチル71.5g、メタクリル酸5.72g、ジ-2-エチルヘキシルスルホコハク酸アンモニウム7.5g、及びイオン交換水375.0gをホモジナイザー(25000rpm)で乳化処理して単量体混合物(M8)を調製し、該単量体混合物(M8)のうちの10%を上記フラスコに投入した後、窒素雰囲気下で80℃に昇温した。次いで、予め調製した過硫酸アンモニウム0.30gの水溶液(イオン交換水15.0gに溶解させた)を、上記フラスコ内に一括仕込みして、60分間保持して、シード粒子を形成させた。さらに、シード粒子が形成された上記フラスコ内に、残りの単量体混合物(M8)を270分かけて滴下し、滴下後1時間保持して、重合を終了して、平均粒子径0.62μmのアクリル重合体エマルション(E8)を得た。上記アクリル重合体エマルション(E8)におけるアクリルモノマーの組成から、ガラス転移温度は95.3℃、溶解度パラメータ(Fedors法)は20.52である。
得られたアクリル重合体エマルション(E8)を噴霧乾燥処理し、アクリル重合体粉体(P8)を得た。
脂環式エポキシ化合物(商品名「セロキサイド2021P」、(株)ダイセル製)100重量部、及びアクリル重合体粉体(P1)10重量部を、自公転式攪拌装置(商品名「あわとり練太郎AR-250」、(株)シンキー製)を使用して均一に混合し、脱泡してA剤を得た。
硬化剤(酸無水物)(商品名「MH-700F」、新日本理化(株)製)110重量部、硬化促進剤(商品名「U-CAT 18XD」、サンアプロ(株)製)0.5重量部、及びエチレングリコール(和光純薬工業(株)製)3重量部を、自公転式攪拌装置(商品名「あわとり練太郎AR-250」、(株)シンキー製)を使用して均一に混合し、脱泡してB剤を得た。
上記で得たA剤とB剤とを[A剤/B剤](重量比)=100/100の割合で、自公転式攪拌装置(商品名「あわとり練太郎AR-250」、(株)シンキー製)を使用して均一に混合し、脱泡して、硬化性エポキシ樹脂組成物を得た。
さらに、上記で得た硬化性エポキシ樹脂組成物を図1に示す光半導体のリードフレーム(InGaN素子、3.5mm×2.8mm)に注型した後、120℃のオーブン(樹脂硬化オーブン)で5時間加熱することで、上記硬化性エポキシ樹脂組成物の硬化物により光半導体素子を封止した光半導体装置を得た。なお、図1において、100はリフレクター(光反射用樹脂組成物)、101は金属配線、102は光半導体素子、103はボンディングワイヤ、104は硬化物(封止材)を示す。
A剤、B剤の組成を表2、表3に示す組成に変更したこと以外は実施例1と同様にして、硬化性エポキシ樹脂組成物を調製した。また、実施例1と同様に光半導体装置を作製した。なお、表2、表3に示すように、実施例2、比較例2においては硬化性エポキシ樹脂組成物の構成成分としてB剤は使用せず、A剤のみを使用した。
実施例及び比較例で得られた光半導体装置を用いて、下記の評価試験を実施した。
実施例及び比較例で得られた光半導体装置(各硬化性エポキシ樹脂組成物につき10個用いた)の全光束を全光束測定機を用いて測定した(「初期の全光束」とした)。さらに、60℃、90%RHの恒温槽内で1000時間、光半導体装置に20mAの電流を流した後の全光束を測定した(「1000時間後の全光束」とした)。そして、次式から光度維持率を算出し、10個の光半導体装置のうち、光度維持率が90%未満であった光半導体装置の個数を計測した。結果を表2、3に示す。
(光度維持率(%))
=100×(1000時間後の全光束(lm))/(初期の全光束(lm))
実施例及び比較例で得られた光半導体装置(各硬化性エポキシ樹脂組成物につき10個用いた)の全光束を全光束測定機を用いて測定した(「初期の全光束」とした)。さらに、上記光半導体装置を30℃、70%RHの条件下に168時間置いて吸湿させた後、リフロー炉に入れ、下記加熱条件にて加熱した。その後、上記光半導体装置を室温環境下に取り出して放冷した後、再度リフロー炉に入れて同条件で加熱した。即ち、当該試験においては、光半導体装置に対して下記加熱条件による熱履歴を二度与えた。
〔加熱条件(光半導体装置の表面温度基準)〕
(1)予備加熱:150~190℃で60~120秒
(2)予備加熱後の本加熱:217℃以上で60~150秒、最高温度260℃
但し、予備加熱から本加熱に移行する際の昇温速度は最大で3℃/秒に制御した。
図2には、リフロー炉による加熱の際の光半導体装置の表面温度プロファイル(二度の加熱のうち一方の加熱における温度プロファイル)の一例を示す。
その後、光半導体装置の全光束を測定した(「リフロー後の全光束」とした)。そして、次式から光度維持率を算出し、10個の光半導体装置のうち、光度維持率が90%未満であった光半導体装置の個数を計測した。結果を表2、3に示す。
(光度維持率(%))
=100×(リフロー後の全光束(lm))/(初期の全光束(lm))
実施例及び比較例で得られた光半導体装置(各硬化性エポキシ樹脂組成物につき10個用いた)を、上記リフロー後の光度維持率測定と同様の条件で加熱処理した。次に、加熱処理後の光半導体装置を、25℃において、レッドインク(水性)中に4時間浸漬した。その後、レッドインクから取り出し、光半導体装置の内部にまでレッドインクが浸透したか否か(浸透した場合には電極が赤く染色する)を、デジタルマイクロスコープ(VHX-900、(株)キーエンス製)を使用して観察した。10個の光半導体装置のうち、レッドインクが浸透した光半導体装置の個数を計測した。結果を表2、3に示す。なお、レッドインクの浸透は、硬化物の剥離及び/又はクラックが生じていることを示唆するものである。
実施例及び比較例で得られた光半導体装置(各硬化性エポキシ樹脂組成物につき10個用いた)の全光束を全光束測定機を用いて測定した(「初期の全光束」とした)。さらに、上記光半導体装置に対し、-40℃の雰囲気下に15分曝露し、続いて、120℃の雰囲気下に15分曝露することを1サイクルとした熱衝撃を、熱衝撃試験機を用いて1000サイクル分与えた。その後、光半導体装置の全光束を測定した(「熱衝撃後の全光束」とした)。そして、次式から光度維持率を算出し、10個の光半導体装置のうち、光度維持率が90%未満であった光半導体装置の個数を計測した。結果を表2、3に示す。
(光度維持率(%))
=100×(熱衝撃後の全光束(lm))/(初期の全光束(lm))
MMA:メタクリル酸メチル
n-BMA:メタクリル酸n-ブチル
BA:アクリル酸n-ブチル
i-BMA:メタクリル酸i-ブチル
MAA:メタクリル酸
HEMA:メタクリル酸2-ヒドロキシエチル
CEL2021P(セロキサイド2021P):3,4-エポキシシクロヘキシルメチル(3,4-エポキシ)シクロヘキサンカルボキシレート、(株)ダイセル製
MA-DGIC:モノアリルジグリシジルイソシアヌレート、四国化成工業(株)製
セロキサイド3000:1,2,8,9-ジエポキシリモネン、(株)ダイセル製
YD-128:ビスフェノールA型エポキシ樹脂、新日鐵化学(株)製
Z-6040:シランカップリング剤、東レ・ダウコーニング(株)製
SI-100L(サンエイド SI-100L):アリールスルホニウム塩、三新化学工業(株)製
MH-700F(リカシッド MH-700F):硬化剤、新日本理化(株)製
U-CAT 18XD:硬化促進剤、サンアプロ(株)製
エチレングリコール:和光純薬工業(株)製
・樹脂硬化オーブン
エスペック(株)製 GPHH-201
・恒温槽
エスペック(株)製 小型高温チャンバー ST-120B1
・全光束測定機
オプトロニックラボラトリーズ社製 マルチ分光放射測定システム OL771
・熱衝撃試験機
エスペック(株)製 小型冷熱衝撃装置 TSE-11-A
・リフロー炉
日本アントム(株)製、UNI-5016F
101:金属配線
102:光半導体素子
103:ボンディングワイヤ
104:硬化物(封止材)
Claims (8)
- 脂環式エポキシ化合物と、溶解度パラメータ(Fedors法)が19.5~21.5[MPa1/2]であるコアシェル型アクリルポリマー粒子とを含有し、
前記コアシェル型アクリルポリマー粒子のコアを構成するアクリルポリマーのガラス転移温度が60~120℃、シェルを構成するアクリルポリマーのガラス転移温度が60~120℃であり、
前記コアシェル型アクリルポリマー粒子の含有量が、前記脂環式エポキシ化合物100重量部に対して1~30重量部であり、
25℃における粘度が60~6000mPa・sであることを特徴とする硬化性エポキシ樹脂組成物。 - さらに、硬化剤及び硬化促進剤、又は硬化触媒を含む請求項1~4のいずれか1項に記載の硬化性エポキシ樹脂組成物。
- 請求項1~5のいずれか1項に記載の硬化性エポキシ樹脂組成物を硬化して得られる硬化物。
- 光半導体封止用樹脂組成物である請求項1~5のいずれか1項に記載の硬化性エポキシ樹脂組成物。
- 請求項7に記載の硬化性エポキシ樹脂組成物の硬化物により光半導体素子が封止された光半導体装置。
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| JP2015086376A (ja) * | 2013-09-26 | 2015-05-07 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
| JP2016050221A (ja) * | 2014-08-28 | 2016-04-11 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
| WO2019124476A1 (ja) * | 2017-12-21 | 2019-06-27 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物及びその硬化物、並びに光半導体装置 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000344867A (ja) * | 1999-06-01 | 2000-12-12 | Shikoku Chem Corp | 熱硬化性エポキシ樹脂組成物 |
| WO2006019041A1 (ja) * | 2004-08-18 | 2006-02-23 | Kaneka Corporation | 半導体封止剤用エポキシ樹脂組成物およびエポキシ樹脂成形材料 |
| JP2007320974A (ja) * | 2006-05-30 | 2007-12-13 | Daicel Chem Ind Ltd | 光半導体封止用樹脂組成物 |
| JP2009249569A (ja) * | 2008-04-09 | 2009-10-29 | Japan Epoxy Resin Kk | 光学素子封止材用エポキシ樹脂組成物 |
| WO2010013407A1 (ja) * | 2008-07-31 | 2010-02-04 | ダイセル化学工業株式会社 | 光半導体封止用樹脂組成物とこれを使用した光半導体装置 |
| JP2010053199A (ja) * | 2008-08-27 | 2010-03-11 | Daicel Chem Ind Ltd | 光半導体封止用樹脂組成物 |
| JP2012077129A (ja) * | 2010-09-30 | 2012-04-19 | Namics Corp | 樹脂組成物、および、それを用いた封止材 |
Family Cites Families (1)
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| WO2010090246A1 (ja) * | 2009-02-05 | 2010-08-12 | 三菱レイヨン株式会社 | ビニル重合体粉体、硬化性樹脂組成物及び硬化物 |
-
2012
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000344867A (ja) * | 1999-06-01 | 2000-12-12 | Shikoku Chem Corp | 熱硬化性エポキシ樹脂組成物 |
| WO2006019041A1 (ja) * | 2004-08-18 | 2006-02-23 | Kaneka Corporation | 半導体封止剤用エポキシ樹脂組成物およびエポキシ樹脂成形材料 |
| JP2007320974A (ja) * | 2006-05-30 | 2007-12-13 | Daicel Chem Ind Ltd | 光半導体封止用樹脂組成物 |
| JP2009249569A (ja) * | 2008-04-09 | 2009-10-29 | Japan Epoxy Resin Kk | 光学素子封止材用エポキシ樹脂組成物 |
| WO2010013407A1 (ja) * | 2008-07-31 | 2010-02-04 | ダイセル化学工業株式会社 | 光半導体封止用樹脂組成物とこれを使用した光半導体装置 |
| JP2010053199A (ja) * | 2008-08-27 | 2010-03-11 | Daicel Chem Ind Ltd | 光半導体封止用樹脂組成物 |
| JP2012077129A (ja) * | 2010-09-30 | 2012-04-19 | Namics Corp | 樹脂組成物、および、それを用いた封止材 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015086376A (ja) * | 2013-09-26 | 2015-05-07 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
| JP2016050221A (ja) * | 2014-08-28 | 2016-04-11 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
| WO2019124476A1 (ja) * | 2017-12-21 | 2019-06-27 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物及びその硬化物、並びに光半導体装置 |
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| CN104024333B (zh) | 2017-03-01 |
| JP6010550B2 (ja) | 2016-10-19 |
| KR20140109396A (ko) | 2014-09-15 |
| TWI607054B (zh) | 2017-12-01 |
| TW201343773A (zh) | 2013-11-01 |
| KR101915341B1 (ko) | 2018-11-05 |
| CN104024333A (zh) | 2014-09-03 |
| JPWO2013099693A1 (ja) | 2015-05-07 |
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