WO2023008351A1 - 透明樹脂組成物 - Google Patents
透明樹脂組成物 Download PDFInfo
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- WO2023008351A1 WO2023008351A1 PCT/JP2022/028562 JP2022028562W WO2023008351A1 WO 2023008351 A1 WO2023008351 A1 WO 2023008351A1 JP 2022028562 W JP2022028562 W JP 2022028562W WO 2023008351 A1 WO2023008351 A1 WO 2023008351A1
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- Prior art keywords
- resin composition
- transparent resin
- group
- component
- epoxy
- Prior art date
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- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- PRCNQQRRDGMPKS-UHFFFAOYSA-N pentane-2,4-dione;zinc Chemical compound [Zn].CC(=O)CC(C)=O.CC(=O)CC(C)=O PRCNQQRRDGMPKS-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000005003 perfluorobutyl group Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)* 0.000 description 1
- 125000005004 perfluoroethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
- 125000005005 perfluorohexyl group Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)* 0.000 description 1
- 125000005008 perfluoropentyl group Chemical group FC(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)* 0.000 description 1
- 125000005009 perfluoropropyl group Chemical group FC(C(C(F)(F)F)(F)F)(F)* 0.000 description 1
- CUQCMXFWIMOWRP-UHFFFAOYSA-N phenyl biguanide Chemical compound NC(N)=NC(N)=NC1=CC=CC=C1 CUQCMXFWIMOWRP-UHFFFAOYSA-N 0.000 description 1
- 229960000969 phenyl salicylate Drugs 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- WSFQLUVWDKCYSW-UHFFFAOYSA-M sodium;2-hydroxy-3-morpholin-4-ylpropane-1-sulfonate Chemical compound [Na+].[O-]S(=O)(=O)CC(O)CN1CCOCC1 WSFQLUVWDKCYSW-UHFFFAOYSA-M 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000006337 tetrafluoro ethyl group Chemical group 0.000 description 1
- GHPYAGKTTCKKDF-UHFFFAOYSA-M tetraphenylphosphanium;thiocyanate Chemical compound [S-]C#N.C1=CC=CC=C1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 GHPYAGKTTCKKDF-UHFFFAOYSA-M 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XDKMXYYPKSWJNR-UHFFFAOYSA-N thiocyanic acid;triphenylphosphane Chemical compound SC#N.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 XDKMXYYPKSWJNR-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- WLPUWLXVBWGYMZ-UHFFFAOYSA-N tricyclohexylphosphine Chemical compound C1CCCCC1P(C1CCCCC1)C1CCCCC1 WLPUWLXVBWGYMZ-UHFFFAOYSA-N 0.000 description 1
- 125000004950 trifluoroalkyl group Chemical group 0.000 description 1
- YFHICDDUDORKJB-UHFFFAOYSA-N trimethylene carbonate Chemical compound O=C1OCCCO1 YFHICDDUDORKJB-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- CHJMFFKHPHCQIJ-UHFFFAOYSA-L zinc;octanoate Chemical compound [Zn+2].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O CHJMFFKHPHCQIJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C08G59/30—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen
- C08G59/308—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen containing halogen atoms
-
- 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
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
-
- 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
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
- C08K5/1565—Five-membered rings
-
- 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
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
- C08K5/1575—Six-membered rings
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/52—Encapsulations
- H01L33/56—Materials, e.g. epoxy or silicone resin
Definitions
- the present invention relates to transparent resin compositions.
- Transparent resin compositions are used as sealing materials and adhesive materials for transparent parts of electronic devices such as LED devices and transparent FPCs.
- a transparent resin composition for example, Patent Document 1 discloses a resin composition containing a bisphenol AF type epoxy resin, a thermoplastic resin, and a curing accelerator.
- thermosetting resin composition such as that described in Patent Document 1 may warp due to shrinkage during curing. Therefore, there is a demand for a resin composition that can form a cured product that is excellent in suppressing warpage. Further, there is a demand for a transparent resin composition capable of forming a cured product excellent in yellowing resistance for use in transparent portions of electronic devices such as LED devices and transparent FPCs.
- the present invention has been made in view of the circumstances as described above, and its purpose is to provide a transparent resin composition capable of forming a cured product excellent in warpage suppression and yellowing resistance.
- the present invention capable of achieving the above object is as follows.
- a transparent resin composition comprising: [2] The transparent resin composition according to [1] above, wherein the component (B) is a 5-membered cyclic carbonate and/or a 6-membered cyclic carbonate. [3] The transparent resin composition according to [1] or [2], wherein the content of component (B) is 0.1 to 20% by mass relative to the non-volatile content of the transparent resin composition.
- the transparent resin composition layer has an average value of total light transmittance of 80% or more at a wavelength of 380 to 780 nm.
- An electronic device comprising a cured product layer formed from the transparent resin composition according to any one of [1] to [6].
- the average value of total light transmittance of the cured product layer at a wavelength of 380 to 780 nm is 80% or more.
- the present invention provides the following components (A) to (C): (A) an epoxy resin having a fluoroalkyl group and/or an alicyclic structure; (B) a cyclic carbonate, and (C) a curing accelerator, To provide a transparent resin composition comprising: Unless otherwise specified, in the present invention, each component may be used alone or in combination of two or more. Components (A) to (C) will be described in order below.
- Component (A) used in the present invention is an epoxy resin having a fluoroalkyl group and/or an alicyclic structure.
- epoxy resin means a thermosetting resin having an epoxy group and an epoxy equivalent of 5,000 g/eq or less.
- the epoxy equivalent means the number of grams of resin containing one gram equivalent of epoxy groups (unit: g/eq).
- the epoxy equivalent means the value obtained by dividing the molecular weight of the resin by the number of epoxy groups in the resin, that is, the molecular weight per epoxy group. Epoxy equivalent is measured according to the method specified in JIS K 7236.
- the fluoroalkyl group that component (A) may have is preferably a C 1-6 fluoroalkyl group, more preferably a C 1-6 perfluoroalkyl group, and particularly preferably a trifluoroalkyl group. It is a fluoromethyl group.
- C xy (x and y: integers) means that the number of carbon atoms is from x to y.
- fluoroalkyl group means an alkyl group substituted with fluorine atoms
- perfluoroalkyl group means an alkyl group in which all hydrogen atoms are substituted with fluorine atoms. .
- C 1-6 fluoroalkyl group includes, for example, fluoromethyl group, difluoromethyl group, perfluoromethyl group (that is, trifluoromethyl group), 2-fluoroethyl group, 2,2, 2-trifluoroethyl group, perfluoroethyl group, 2,2-difluoropropyl group, perfluoropropyl group, perfluorobutyl group, perfluoropentyl group and perfluorohexyl group.
- examples of the "C 1-6 perfluoroalkyl group” include those which are perfluoroalkyl groups among the above examples of the "C 1-6 fluoroalkyl group”.
- the alicyclic structure that component (A) may have is preferably a C 3-12 alicyclic structure from the viewpoint of yellowing resistance.
- the alicyclic structure may be any of a monocyclic structure, a bicyclic structure, a condensed polycyclic structure, and a condensed polycyclic structure containing a bicyclic ring.
- the component (A) may have one alicyclic structure or two or more alicyclic structures.
- the alicyclic structure that component (A) may have is more preferably a C 3-8 cycloalkane ring structure and/or a dicyclopentadiene ring structure.
- component (A) is more preferably an epoxy resin having at least one selected from the group consisting of a fluoroalkyl group, a C 3-8 cycloalkane ring structure and a dicyclopentadiene ring structure.
- the “C 3-8 cycloalkane ring” includes, for example, cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane ring, cycloheptane ring and cyclooctane ring.
- the alicyclic structure that component (A) may have is more preferably a C 5-6 cycloalkane ring structure (ie, cycloheptane ring structure, cyclohexane ring structure).
- Epoxy resins having a fluoroalkyl group include, for example, bisphenol AF type epoxy resins having a trifluoromethyl group. Fluorine-containing epoxy resins described in WO2011/089947 can also be used as epoxy resins having fluoroalkyl groups.
- "X-type epoxy resin” (example of X: bisphenol AF) means an epoxy resin having a structure derived from X, as is well known in the field of epoxy resins.
- epoxy resins having an alicyclic structure examples include bisphenol TMC type epoxy resins having a cyclohexane ring structure and bisphenol Z type epoxy resins having a cyclohexane ring structure.
- Epoxy resins having a cyclohexane ring structure other than bisphenol TMC type epoxy resins and bisphenol Z type epoxy resins can also be used as the component (A).
- (A) component from the viewpoint of yellowing resistance, (i) preferably an epoxy resin having a fluoroalkyl group and/or an epoxy resin having an alicyclic structure, (ii) more preferably at least one selected from the group consisting of an epoxy resin having a C 1-6 fluoroalkyl group, an epoxy resin having a C 3-8 cycloalkane ring structure and an epoxy resin having a dicyclopentadiene ring structure can be, (iii) more preferably an epoxy resin having a C 1-6 perfluoroalkyl group and/or an epoxy resin having a C 5-6 cycloalkane ring structure, (iv) more preferably an epoxy resin having a trifluoromethyl group and/or an epoxy resin having a cyclohexane ring structure, (v) Particularly preferred are bisphenol AF type epoxy resins and/or epoxy resins having a cyclohexane ring structure.
- the component (A) may be a commercially available product or one produced by a known method (for example, reaction of bisphenol AF, bisphenol TMC or bisphenol Z with epichlorohydrin).
- Examples of commercially available products include “YX7760", “YX8000", and “YX8034” manufactured by Mitsubishi Chemical Corporation, “EHPE3150”, “EHPE3150CE” manufactured by Daicel Corporation, “Ceroxide 2021P”, “Ceroxide 2081P”, “Ceroxide 2000”, “ Celoxide 8000”, DIC's "HP-7200”, “HP-7200L”, “HP-7200H”, Nippon Kayaku's "XD-1000", Nagase ChemteX's "Denacol EX-252", Showa Denko "Showfree CDMDG” manufactured by ENEOS, "THI-DE”, “DE-102”, “DE-103” manufactured by Japan Material Technologies Co., Ltd. “DCPD-DE” manufactured by Shin-Etsu Chemical Co., Ltd.
- the epoxy equivalent of component (A) is preferably from 50 to 5,000 g/eq, more preferably from 80 to 2,000 g/eq, still more preferably from 100 to 100 g/eq, from the viewpoint of adhesion strength of the cured product of the transparent resin composition layer. 1,500 g/eq.
- the content of component (A) is preferably 20 to 94% by mass, more preferably 40 to 89% by mass, still more preferably 50 to 84%, based on the non-volatile content of the transparent resin composition. % by mass.
- the content means the sum total of content of several (A) components.
- the contents of components other than component (A) when a plurality of said components are used, the content means the sum of the contents of said components.
- the (B) component used in the present invention is a cyclic carbonate.
- cyclic carbonate means a compound having a cyclic structure containing a carbonate bond (--O--C(O)--O--).
- component (A) component is excellent in yellowing resistance. Moreover, by using the component (B), it is possible to reduce the warpage of the cured product while maintaining the excellent yellowing resistance of the cured product obtained from the resin composition containing the component (A). In addition, although the cured product obtained from the resin composition containing the component (A) tends to have low fracture toughness, the use of the component (B) can improve the fracture toughness of the cured product. .
- the component (B) is preferably a 5-membered cyclic carbonate and/or a 6-membered cyclic carbonate from the viewpoint of suppressing warpage.
- the term "5-membered cyclic carbonate” means a cyclic carbonate having 5 ring atoms
- the term “6-membered cyclic carbonate” refers to a cyclic carbonate having 6 ring atoms. means carbonate.
- the cyclic carbonate as component (B) may have a substituent.
- substituents that the cyclic carbonate may have include halogen atoms, C 1-6 alkyl groups, and C 1-6 haloalkyl groups.
- halogen atom includes, for example, a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- C 1-6 alkyl group includes, for example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, isopentyl group, neopentyl group, 1-ethylpropyl group, hexyl group, isohexyl group, 1,1-dimethylbutyl group, 2,2-dimethylbutyl group, 3,3-dimethylbutyl group and 2-ethylbutyl group.
- haloalkyl group means an alkyl group substituted with a halogen atom.
- C 1-6 haloalkyl group includes, for example, chloromethyl group, difluoromethyl group, trichloromethyl group, trifluoromethyl group, 2-bromoethyl group, 2,2,2-trifluoroethyl group , tetrafluoroethyl group, pentafluoroethyl group, 2,2-difluoropropyl group, 3,3,3-trifluoropropyl group, 4,4,4-trifluorobutyl group, 5,5,5-trifluoropentyl and 6,6,6-trifluorohexyl groups.
- the component (B) is (i) a 5-membered cyclic carbonate optionally substituted with 1 to 4 substituents more preferably selected from the group consisting of a halogen atom, a C 1-6 alkyl group and a C 1-6 haloalkyl group, and/ or a 6-membered cyclic carbonate optionally substituted with 1 to 6 substituents selected from the group consisting of a halogen atom, a C 1-6 alkyl group and a C 1-6 haloalkyl group, (ii) more preferably a 5-membered cyclic carbonate optionally substituted by 1 to 4 C 1-6 alkyl groups and/or optionally substituted by 1 to 6 C 1-6 alkyl groups is a good 6-membered cyclic carbonate, (iii) more preferably a 5-membered cyclic carbonate optionally substituted by 1 to 3 C 1-6 alkyl groups and/or optionally substituted by 1 to 3 C
- the content of component (B) is preferably 0.1 to 20% by mass, more preferably 0.75 to 15% by mass, more preferably 0.75 to 15% by mass, more preferably It is 1.0 to 10% by mass.
- the (C) component used in the present invention is a curing accelerator.
- curing accelerator means an additive that accelerates the curing reaction between components (A) (that is, epoxy resins having fluoroalkyl groups and/or alicyclic structures).
- an additive that accelerates the curing reaction between epoxy resins is sometimes called a curing agent (particularly, a catalyst-type curing agent).
- Component curing accelerators include, for example, phosphorus-based curing accelerators (e.g., phosphonium salts, phosphines), imidazole-based curing accelerators, amine-based curing accelerators, guanidine-based curing accelerators, and metal-based curing accelerators. agents.
- phosphorus-based curing accelerators e.g., phosphonium salts, phosphines
- imidazole-based curing accelerators e.g., imidazole-based curing accelerators
- amine-based curing accelerators e.g., guanidine-based curing accelerators
- metal-based curing accelerators e.g., metal-based curing accelerators.
- Phosphonium salts include, for example, phosphonium borate compounds, tetraphenylphosphonium tetraphenylborate, n-butylphosphonium tetraphenylborate, tetrabutylphosphonium decanoate, (4-methylphenyl)triphenylphosphonium thiocyanate, tetraphenylphosphonium thiocyanate, butyl and triphenylphosphonium thiocyanate.
- a commercial item can be used for the phosphonium salt. Examples of such commercial products include "TBP-DA" manufactured by Hokko Chemical Industry Co., Ltd.
- Phosphines include, for example, triphenylphosphine, tricyclohexylphosphine, tributylphosphine, and methyldiphenylphosphine.
- imidazole curing accelerators examples include 2-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 1,2-dimethylimidazole, 2-ethyl-4-methylimidazole, 1,2-dimethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazolium trimellitate, 1-cyanoethyl- 2-phenylimidazolium trimellitate, 2,4-d
- a commercial item can be used as an imidazole type hardening accelerator.
- Examples of such commercial products include "P200-H50” manufactured by Mitsubishi Chemical Co., Ltd. and "1B2PZ-10M” manufactured by Shikoku Kasei Kogyo Co., Ltd.
- amine curing accelerators examples include trialkylamines such as triethylamine and tributylamine, 4-dimethylaminopyridine, benzyldimethylamine, 2,4,6-tris(dimethylaminomethyl)phenol, 1,8-diazabicyclo ( 5,4,0)-undecene and the like.
- Guanidine curing accelerators include, for example, dicyandiamide, 1-methylguanidine, 1-ethylguanidine, 1-cyclohexylguanidine, 1-phenylguanidine, 1-(o-tolyl)guanidine, dimethylguanidine, diphenylguanidine, trimethylguanidine, Tetramethylguanidine, Pentamethylguanidine, 1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-methyl-1,5,7-triazabicyclo[4.4.0] Dec-5-ene, 1-methylbiguanide, 1-ethylbiguanide, 1-n-butylbiguanide, 1-n-octadecylbiguanide, 1,1-dimethylbiguanide, 1,1-diethylbiguanide, 1-cyclohexylbiguanide, 1 -allylbiguanide, 1-phenylbiguanide, 1-(o-tolyl)biguanide and
- metal-based curing accelerators include organometallic complexes or organometallic salts in which the metal is cobalt, copper, zinc, iron, nickel, manganese, or tin.
- organometallic complexes include organocobalt complexes such as cobalt (II) acetylacetonate and cobalt (III) acetylacetonate, organocopper complexes such as copper (II) acetylacetonate, and zinc (II) acetylacetonate.
- organic zinc complexes such as iron (III) acetylacetonate, organic nickel complexes such as nickel (II) acetylacetonate, and organic manganese complexes such as manganese (II) acetylacetonate.
- organic metal salts include zinc octoate, tin octoate, zinc naphthenate, cobalt naphthenate, tin stearate and zinc stearate.
- the content of component (C) is preferably 0.1 to 5% by mass, more preferably 0.3 to 4% by mass, and even more preferably, the non-volatile content of the transparent resin composition. is 0.5 to 3% by mass.
- a phosphonium salt as a curing accelerator.
- the content of the phosphonium salt in the transparent resin composition of the present invention is preferably 90-100% by mass, more preferably 95-100% by mass, based on the total component (C).
- the component (C) is a phosphonium salt, that is, the entire component (C) consists of a phosphonium salt.
- the transparent resin composition of the present invention contains components other than components (A) to (C) (which may be referred to as “other components” in this specification) to the extent that the effects of the present invention are not impaired. You can stay.
- other components include polymer compounds, epoxy resins other than component (A), organic solvents, antioxidants, ultraviolet absorbers, and light stabilizers.
- the other components only one type may be used, or two or more types may be used in combination.
- polymer compound In order to form a film of the transparent resin composition, it is preferable to use a polymer compound (which may be referred to as “component (D)" in this specification).
- component (D) a polymer compound
- the term "polymer compound” means a compound having a weight average molecular weight (hereinafter sometimes referred to as "Mw") of 1,000 or more. This Mw can be measured by gel permeation chromatography (GPC).
- Examples of the polymer compound (D) include phenoxy resins, polyester polyols, polyether polyols, polycarbonate polyols, and (meth)acrylic resins.
- a preferred Mw of the phenoxy resin will be described later.
- the Mw of the polyester polyol is preferably from 1,000 to 10,000.
- the Mw of the polyether polyol is from 1,000 to 10,000.
- the Mw of the polycarbonate polyol is 1,000 to 10,000.
- Mw of the (meth)acrylic resin is preferably 1,000 to 500,000.
- the (D) component is preferably a phenoxy resin.
- phenoxy resin means a high-molecular-weight polyhydroxy polyether having a structure derived from bisphenols. Examples of phenoxy resins include those obtained by the reaction of bisphenols and epichlorohydrin, and those obtained by the reaction of bisphenol-type epoxy resins.
- bisphenol-type epoxy resin means an epoxy resin having a structure derived from bisphenols (eg, bisphenol AF).
- the phenoxy resin may have a structure other than the structure derived from bisphenols.
- the phenoxy resin may or may not have an epoxy group.
- the "phenoxy resin having an epoxy group” and the "epoxy resin” are distinguished by the epoxy equivalent. That is, in the present invention, those having an epoxy equivalent of more than 5000 g/eq are classified as "epoxy group-containing phenoxy resins", and those having an epoxy equivalent of 5000 g/eq or less are classified as "epoxy resins”.
- the epoxy equivalent of the phenoxy resin having an epoxy group is preferably more than 5,000 g/eq and 40,000 g/eq or less, more preferably 7,000 to 40,000 g/eq, from the viewpoint of film formation of the transparent resin composition and adhesion strength of the cured product. 35,000 g/eq, more preferably 8,000 to 30,000 g/eq.
- the weight-average molecular weight of the phenoxy resin is preferably more than 10,000 and 100,000 or less, more preferably 20,000 to 80,000, and further preferably from the viewpoint of compatibility in the transparent resin composition and adhesion strength of the cured product. It is preferably 25,000 to 60,000.
- a commercially available phenoxy resin may be used, or one produced by a known method (eg, reaction of bisphenols and epichlorohydrin) may be used.
- Commercial products include, for example, “YX7200B35”, “1256”, “4250”, “YX8100”, “YX6954BH30”, “YX7553BH30", “YL7769BH30”, “YX7876B40", “YL9008B40", and "YL6794” manufactured by Mitsubishi Chemical Corporation. , “YL7213”, “YL7891BH30”, “YL7482”, Nippon Steel Chemical & Materials “YP-50”, “YP-70S”, “FX-293”, “FX280S”.
- phenoxy resin preferably a phenoxy resin having a fluoroalkyl group and/or a phenoxy resin having an alicyclic structure; (ii) more preferably a phenoxy resin having a C 1-6 fluoroalkyl group and/or a phenoxy resin having a C 3-8 cycloalkane ring structure, (iii) more preferably a phenoxy resin having a C 1-6 perfluoroalkyl group and/or a phenoxy resin having a C 5-6 cycloalkane ring structure, (iv) more preferably a phenoxy resin having a trifluoromethyl group and/or a phenoxy resin having a cyclohexane ring structure, (v) particularly preferably a bisphenol AF type phenoxy resin and/or a phenoxy resin having a cyclohexane ring structure, (vi) Most preferred are bisphenol AF type phenoxy resins
- component (D) When component (D) is used, its content is preferably 5 to 50% by mass based on the non-volatile content of the transparent resin composition, from the viewpoint of film formation of the transparent resin composition and adhesion strength of the cured product. More preferably 7.5 to 45% by mass, still more preferably 10 to 40% by mass.
- the content of the phenoxy resin is preferably 5% relative to the non-volatile content of the transparent resin composition, from the viewpoint of film formation of the transparent resin composition and adhesion strength of the cured product. ⁇ 50% by mass, more preferably 7.5 to 45% by mass, still more preferably 10 to 40% by mass.
- the transparent resin composition of the present invention may contain an epoxy resin other than the component (A) (which may be referred to as "another epoxy resin” in this specification) as long as the effect of the present invention is not impaired. good.
- Other epoxy resins may be used alone or in combination of two or more.
- the other epoxy resin is not particularly limited, and known epoxy resins can be used.
- Other epoxy resins include, for example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, biphenyl type epoxy resin, biphenyl alkyl type epoxy resin, naphthol type epoxy resin, and naphthalene type epoxy resin.
- a mixture of multiple types of epoxy resins for example, a mixture of bisphenol A type epoxy resin and bisphenol F type epoxy resin may be used.
- the epoxy equivalent of the other epoxy resin is preferably 50 to 5,000 g/eq, more preferably 80 to 2,000 g/eq, and still more preferably 100 to 1, from the viewpoint of adhesion strength of the cured product of the transparent resin composition. , 500 g/eq.
- the transparent resin composition of the present invention does not contain other epoxy resins, or contains other epoxy resins in an amount of 50% by mass or less with respect to the total of other epoxy resins and component (A). (that is, the content of the other epoxy resin is limited to 50% by mass or less with respect to the total of the other epoxy resin and the component (A)).
- the content of the other epoxy resin is more preferably 30% by mass or less, still more preferably 20% by mass or less, relative to the total of the other epoxy resin and component (A).
- the transparent resin composition of the present invention may contain an organic solvent. That is, the transparent resin composition of the present invention may be a varnish-like transparent resin composition containing an organic solvent.
- organic solvents examples include ketones such as acetone, methyl ethyl ketone (MEK), and cyclohexanone; acetic acid esters such as ethyl acetate, butyl acetate, cellosolve acetate, propylene glycol monomethyl ether acetate, and carbitol acetate; cellosolves such as cellosolve; Examples include carbitols such as butyl carbitol, aromatic hydrocarbons such as toluene and xylene, dimethylformamide, dimethylacetamide, and N-methylpyrrolidone.
- ketones such as acetone, methyl ethyl ketone (MEK), and cyclohexanone
- acetic acid esters such as ethyl acetate, butyl acetate, cellosolve acetate, propylene glycol monomethyl ether acetate, and carbitol acetate
- cellosolves such as cell
- an organic solvent When an organic solvent is used, its content is preferably 5 to 50% by mass, more preferably 10 to 45% by mass, still more preferably 15 to 40% by mass, relative to the entire transparent resin composition.
- antioxidants examples include hindered phenol-based antioxidants, phosphorus-based antioxidants, and sulfur-based antioxidants. Specific examples of antioxidants include dibutylhydroxytoluene (BHT), pentaerythritol tetrakis (3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) (manufactured by BASF Japan Ltd., "IRGANOX 1010").
- ultraviolet absorber examples include benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, salicylic acid-based ultraviolet absorbers, and triazine-based ultraviolet absorbers.
- Benzophenone UV absorbers include, for example, 2-hydroxy-4-octyloxybenzophenone, 2,4-dihydroxy-benzophenone, 2-hydroxy-4-methoxy-benzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfone acid, 2-hydroxy-4-n-octyl-benzophenone, 2-hydroxy-4-n-dodecyloxy-benzophenone, bis(5-benzoyl-4-hydroxy-2-methoxyphenyl)methane, 2,2'-dihydroxy- 4-methoxy-benzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone.
- benzotriazole-based UV absorbers examples include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-[2'-hydroxy-3',5'-bis( ⁇ , ⁇ -dimethylbenzyl ) phenyl]-benzotriazole, 2-(2′-hydroxy-3′,5′-di-tert-butylphenyl)-benzotriazole, 2-(2′-hydroxy-3′-tert-butyl-5′- methylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′,5′-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′,5 '-di-tert-amyl)benzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2,2-methylenebis[4-(1,1,3,3-tetramethylbutyl )-6-
- salicylic acid-based UV absorbers examples include phenyl salicylate, 4-tert-butylphenyl 2-hydroxybenzoate, phenyl 2-hydroxybenzoate, 2,4-di-tert-butylphenyl, 3,5-di-tert-butyl- 4-hydroxybenzoate, hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, ethyl 2-cyano-3,3-diphenyl acrylate.
- triazine-based UV absorbers examples include 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol, 2-(4,6-diphenyl-1,3 ,5-triazin-2-yl)-5-[2-(2-ethylhexanoyloxy)ethoxy]phenol, 2-[4,6-bis(dimethylphenyl)-1,3,5-triazine-2- yl]-5- ⁇ 3-[(2-ethylhexyl)oxy]-2-hydroxypropoxy ⁇ -phenol, 2,4,6-tris(2-hydroxy-4-hexyloxy-3-methylphenyl)-1,3 , 5-triazines.
- UV absorbers Commercially available products can be used as UV absorbers. Examples of such commercial products include BASF's "Chimassorb 81 FL", “Tinuvin P”, “Tinuvin 213", “Tinuvin 234", “Tinuvin 326", “Tinuvin 360”, “Tinuvin 571”, “ Tinuvin 1577 ED", "Tinuvin 120", Sanyo Trading "EVERSORB 11”, “EVERSORB 12", “EVERSORB 40”, “EVERSORB 71", “EVERSORB 73”, “EVERSORB 78”, “EVERSORB 80", “ EVERSORB 109", "5405" manufactured by Kusumoto Kasei Co., Ltd., "ADEKA STAB LA-46" and “ADEKA STAB LA-F70” manufactured by ADEKA.
- Examples of light stabilizers include hindered amine light stabilizers.
- hindered amine light stabilizers include bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-2- Butyl-2-(4-hydroxy-3,5-di-tert-butylbenzyl)propanedioate, butane-1,2,3,4-tetracarboxylic acid tetrakis(1,2,2,6,6-pentamethyl) -4-piperidinyl), 1,2,3,4-butanetetracarboxylic acid tetrakis(2,2,6,6-tetramethyl-4-piperidinyl), 1,2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperidinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro [5.5] Mixed esters with undecane, bis(1,2,
- the transparent resin composition of the present invention may contain an inorganic filler as long as the transparency is maintained. From the viewpoint of transparency, the transparent resin composition of the present invention does not contain an inorganic filler, or contains an inorganic filler in an amount of 30% by mass or less relative to the non-volatile content of the transparent resin composition (i.e., inorganic).
- the content of the filler is preferably limited to 30% by mass or less with respect to the non-volatile matter of the transparent resin composition).
- the content of the inorganic filler is more preferably 20% by mass or less, still more preferably 10% by mass or less, and particularly preferably 5% by mass or less, relative to the non-volatile content of the transparent resin composition.
- the average value of the total light transmittance at a wavelength of 380 to 780 nm of the transparent resin composition layer having a thickness of 25 ⁇ m formed from the transparent resin composition of the present invention is preferably 80% or more, more preferably 85% or more. Preferably it is 90% or more. This average value can be measured by the method described in the Examples section below.
- the average value of the total light transmittance at a wavelength of 380 to 780 nm of the cured product layer having a thickness of 25 ⁇ m formed from the transparent resin composition of the present invention is preferably 80% or more, more preferably 85% or more, and still more preferably 90% or more. This average value can be measured by the method described in the Examples section below.
- the present invention also provides a resin sheet having a laminated structure including a support and a transparent resin composition layer formed from the transparent resin composition of the present invention.
- a protective film may be used in the present invention. That is, the resin sheet of the invention may have a laminated structure comprising a support, a transparent resin composition layer, and a protective film in this order. Other layers (eg, release layer, adhesive layer) may be present between the support and the transparent resin composition layer and between the transparent resin composition layer and the protective film.
- the thickness of the transparent resin composition layer is not particularly limited, but the thickness is preferably 1 ⁇ m or more, more preferably 1.5 ⁇ m or more, still more preferably 2 ⁇ m or more, particularly preferably 5 ⁇ m or more, and preferably 150 ⁇ m. Below, it is preferably 120 ⁇ m or less, more preferably 100 ⁇ m or less, and still more preferably 80 ⁇ m or less.
- the support examples include plastic films such as polyethylene, polypropylene, polyvinyl chloride, cycloolefin polymer, polyethylene terephthalate (hereinafter sometimes abbreviated as "PET"), polyethylene naphthalate, polycarbonate, and polyimide, aluminum foil, and stainless steel.
- Metal foils such as foils and copper foils can be used. Among them, polyethylene terephthalate and polyethylene naphthalate are preferable, and inexpensive polyethylene terephthalate is particularly preferable.
- the support may have a release layer on the surface to be bonded to the transparent resin composition layer. Examples of release agents that form the release layer include silicone resin release agents, alkyd resin release agents, and fluororesin release agents.
- the support may be subjected to matte treatment, corona treatment, or antistatic treatment on the surface to be bonded to the transparent resin composition layer.
- the thickness of the support is not particularly limited, the thickness is preferably 5 to 75 ⁇ m, more preferably 10 to 60 ⁇ m.
- the thickness of the release layer-attached support as a whole is preferably within the above range.
- the resin sheet is obtained, for example, by (1) producing a varnish-like transparent resin composition, (2) coating this on a support using a die coater or the like to form a coating film, and (3) obtaining It can be produced by drying the coated film to form a transparent resin composition layer.
- the method for producing the varnish-like transparent resin composition is not particularly limited, and it can be produced by mixing an organic solvent and each component with a known device such as a rotary mixer.
- the coating film can be dried by a known method such as heating or blowing hot air. Drying conditions are not particularly limited. It is preferable to dry until the content of the organic solvent in the transparent resin composition layer becomes 10% by mass or less. The organic solvent content in the dried transparent resin composition layer is more preferably 5% by mass or less. The drying time and drying temperature vary depending on the content of the organic solvent in the varnish-like transparent resin composition and its boiling point. minutes.
- the resin sheet can be rolled up and stored.
- the resin sheet can be used by peeling off the protective film.
- the average value of total light transmittance at a wavelength of 380 to 780 nm of the transparent resin composition layer of the resin sheet of the present invention is preferably 80% or more, more preferably 85%, regardless of the thickness of the transparent resin composition layer. or more, more preferably 90% or more. This average value can be measured by the method described in the Examples section below.
- the present invention also provides an electronic device comprising a cured product layer formed from the transparent resin composition of the present invention.
- electronic devices include LED devices and transparent FPCs.
- the average value of the total light transmittance of the cured product layer of the electronic device of the present invention at a wavelength of 380 to 780 nm is preferably 80% or more, more preferably 85% or more, and further preferably 85% or more, regardless of the thickness of the cured product layer. is 90% or more. This average value can be measured by the method described in the Examples section below.
- the cured product layer is preferably formed by heating the transparent resin composition layer.
- the heating method is not particularly limited, and the transparent resin composition layer can be heated by a known device (for example, hot air circulation oven, infrared heater, heat gun, high-frequency induction heating device).
- the curing temperature is preferably 100° C. or higher, more preferably 120° C. or higher from the viewpoint of accelerating the curing reaction, and preferably 210° C. or lower, more preferably 190° C. or lower from the viewpoint of preventing coloring of the cured product layer. be.
- the curing time is preferably 10 minutes or longer, more preferably 20 minutes or longer, and preferably 180 minutes or shorter, more preferably 120 minutes or shorter.
- ⁇ (B) component cyclic carbonate> "DXC” (manufactured by JNC, 5,5-dimethyl-4-(propan-2-yl)-1,3-dioxan-2-one, CAS number: 32368-14-2) "Ethylene carbonate” (manufactured by Tokyo Chemical Industry Co., Ltd., 1,3-dioxolane-2-one, CAS number: 96-49-1) "DEDPO” (manufactured by JNC, 5,5-diethyl-1,3-dioxan-2-one, CAS number: 13423-63-7)
- ⁇ (C) component curing accelerator> "TBP-DA” (manufactured by Hokko Chemical Industry Co., Ltd., tetrabutylphosphonium decanoate)
- ⁇ (D) component polymer compound> "YX7200B35" (manufactured by Mitsubishi Chemical Corporation, solution of phenoxy resin having biphenyl structure and structure derived from bisphenol TMC, organic solvent: methyl ethyl ketone, non-volatile content: 35%, weight average molecular weight: 30,000, epoxy equivalent: 9,000 g /eq)
- Varnish-like transparent resin compositions of Examples and Comparative Examples were prepared according to the procedure shown below.
- "part" of the amount used for each material means “mass part” unless otherwise specified.
- Example 1 23 parts of the solution of component (D) "YX7200B35" (component (D): 8.05 parts), 18 parts of component (A) “YX7760", and 1.4 parts of component (B) "DXC” were mixed to obtain The resulting mixture was heated to dissolve components (A) and (B). 0.36 part of the component (C) “TBP-DA” was mixed therewith to prepare a varnish-like transparent resin composition.
- Example 2 A varnish-like transparent resin composition was prepared in the same manner as in Example 1 except that 18 parts of component (A) "EHPE3150” was used instead of 18 parts of component (A) "YX7760".
- Example 3 A varnish-like transparent resin composition was prepared in the same manner as in Example 1, except that the amount of component (B) "DXC” used was changed from 1.4 parts to 3.0 parts.
- Example 4 In the same manner as in Example 1, except that 1.4 parts of component (B) "ethylene carbonate” (1,3-dioxan-2-one) was used instead of 1.4 parts of component (B) “DXC”. Thus, a varnish-like transparent resin composition was prepared.
- Example 5 Implemented except that 1.4 parts of component (B) “DEDPO” (5,5-diethyl-1,3-dioxan-2-one) was used instead of 1.4 parts of component (B) “DXC”
- a varnish-like transparent resin composition was prepared in the same manner as in Example 1.
- a slide glass (manufactured by Matsunami Glass Industry Co., Ltd., width: 76 mm, depth: 26 mm, thickness: 1.0 mm) was placed on the transparent resin composition layer of the obtained resin sheet, and a vacuum laminator (manufactured by Nikko Materials Co., V -160). This lamination was carried out by pressure bonding the slide glass for 30 seconds at 80° C. and a pressure of 0.3 MPa after reducing the pressure to 5 hPa or less for 30 seconds. Thus, a laminate having a laminated structure of "PET film/transparent resin composition layer/slide glass" was obtained.
- the PET film was peeled off, and the transparent resin composition layer was thermally cured by further heating at 150 ° C. for 30 minutes.
- a laminate having a laminated structure of about 25 ⁇ m)/slide glass was obtained.
- the PET film used to produce the resin sheet is used as a reference
- the slide glass used to produce the laminate is used as a reference
- the transparent resin composition layer and the cured film are measured.
- the average value of total light transmittance of the material layer was calculated as an index of transparency. The results are listed in Table 1 below. Since the transparent resin composition layer and the cured product layer had the same average total light transmittance, only one value is shown in Table 1 below.
- the resulting resin sheet is cut into 15 cm squares and heated in an oven at 150° C. for 60 minutes to thermally cure the transparent resin composition layer, resulting in a laminate having a laminated structure of “PET film/cured material layer”. got After the laminate was taken out of the oven and allowed to cool, the part where the thickness of the cured product layer was uniform was further cut into 8 cm squares, and two adjacent sides out of the four sides were taped onto a flat substrate.
- the warped height of the corners not in contact with the edge (hereinafter referred to as "warpage height") was measured, and warpage suppression was evaluated according to the following criteria. The results are listed in Table 1 below. (Evaluation criteria for suppressing warpage) Good ( ⁇ ): Warp height is less than 25 mm Poor ( ⁇ ): Warp height is 25 mm or more
- the transparent resin composition of the present invention is useful, for example, as a sealing material or adhesive material for transparent portions of electronic devices such as LED devices and transparent FPCs.
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Abstract
Description
[1] 以下の(A)成分~(C)成分:
(A)フルオロアルキル基および/または脂環式構造を有するエポキシ樹脂、
(B)環状カーボネート、並びに
(C)硬化促進剤、
を含む透明樹脂組成物。
[2] (B)成分が、5員の環状カーボネートおよび/または6員の環状カーボネートである前記[1]に記載の透明樹脂組成物。
[3] (B)成分の含有量が、透明樹脂組成物の不揮発分に対して、0.1~20質量%である前記[1]または[2]に記載の透明樹脂組成物。
[4] さらに高分子化合物を含む前記[1]~[3]のいずれか一つに記載の透明樹脂組成物。
[5] 透明樹脂組成物から形成される厚さ25μmの透明樹脂組成物層の、波長380~780nmの全光線透過率の平均値が80%以上である前記[1]~[4]のいずれか一つに記載の透明樹脂組成物。
[6] 透明樹脂組成物から形成される厚さ25μmの硬化物層の、波長380~780nmの全光線透過率の平均値が80%以上である前記[1]~[5]のいずれか一つに記載の透明樹脂組成物。
[7] 支持体および前記[1]~[6]のいずれか一つに記載の透明樹脂組成物により形成された透明樹脂組成物層とを含む積層構造を有する樹脂シート。
[8] 透明樹脂組成物層の、波長380~780nmの全光線透過率の平均値が80%以上である前記[7]に記載の樹脂シート。
[9] 前記[1]~[6]のいずれか一つに記載の透明樹脂組成物により形成された硬化物層を含む電子デバイス。
[10] 硬化物層の、波長380~780nmの全光線透過率の平均値が80%以上である前記[9]に記載の電子デバイス。
(A)フルオロアルキル基および/または脂環式構造を有するエポキシ樹脂、
(B)環状カーボネート、並びに
(C)硬化促進剤、
を含む透明樹脂組成物を提供する。特段の記載がない限り、本発明において、各成分はいずれも1種のみを使用してもよく、2種以上を併用してもよい。以下、(A)成分~(C)成分について順に説明する。
本発明で使用する(A)成分は、フルオロアルキル基および/または脂環式構造を有するエポキシ樹脂である。
本明細書中、「フルオロアルキル基」とは、フッ素原子で置換されたアルキル基を意味し、「パーフルオロアルキル基」とは、全ての水素原子がフッ素原子で置換されたアルキル基を意味する。
(i)好ましくはフルオロアルキル基を有するエポキシ樹脂および/または脂環式構造を有するエポキシ樹脂であり、
(ii)より好ましくはC1-6フルオロアルキル基を有するエポキシ樹脂、C3-8シクロアルカン環構造を有するエポキシ樹脂およびジシクロペンタジエン環構造を有するエポキシ樹脂からなる群から選ばれる少なくとも一つであり、
(iii)より一層好ましくはC1-6パーフルオロアルキル基を有するエポキシ樹脂および/またはC5-6シクロアルカン環構造を有するエポキシ樹脂であり、
(iv)さらに好ましくはトリフルオロメチル基を有するエポキシ樹脂および/またはシクロヘキサン環構造を有するエポキシ樹脂であり、
(v)特に好ましくはビスフェノールAF型エポキシ樹脂および/またはシクロヘキサン環構造を有するエポキシ樹脂である。
本発明で使用する(B)成分は、環状カーボネートである。本明細書中、「環状カーボネート」とは、カーボネート結合(-O-C(O)-O-)を含む環状構造を有する化合物を意味する。
(i)より好ましくはハロゲン原子、C1-6アルキル基およびC1-6ハロアルキル基からなる群から選ばれる1~4個の置換基で置換されていてもよい5員の環状カーボネート、および/または、ハロゲン原子、C1-6アルキル基およびC1-6ハロアルキル基からなる群から選ばれる1~6個の置換基で置換されていてもよい6員の環状カーボネートであり、
(ii)より一層好ましくは1~4個のC1-6アルキル基で置換されていてもよい5員の環状カーボネートおよび/または1~6個のC1-6アルキル基で置換されていてもよい6員の環状カーボネートであり、
(iii)さらに好ましくは1~3個のC1-6アルキル基で置換されていてもよい5員の環状カーボネートおよび/または1~3個のC1-6アルキル基で置換されていてもよい6員の環状カーボネートであり、
(iv)特に好ましくはエチレンカーボネート(即ち、1,3-ジオキソラン-2-オン)、5,5-ジメチル-4-(プロパン-2-イル)-1,3-ジオキサン-2-オンおよび5,5-ジエチル-1,3-ジオキサン-2-オンからなる群から選ばれる少なくとも一つであり、
(v)最も好ましくはエチレンカーボネート、5,5-ジメチル-4-(プロパン-2-イル)-1,3-ジオキサン-2-オンまたは5,5-ジエチル-1,3-ジオキサン-2-オンである。
本発明で使用する(C)成分は、硬化促進剤である。本明細書中、「硬化促進剤」とは、(A)成分(即ち、フルオロアルキル基および/または脂環式構造を有するエポキシ樹脂)同士の硬化反応を促進する添加剤を意味する。なお、エポキシ分野において、エポキシ樹脂同士の硬化反応を促進する添加剤は、硬化剤(特に、触媒型の硬化剤)と呼ばれることがある。
本発明の透明樹脂組成物は、本発明の効果を阻害しない範囲で、(A)成分~(C)成分以外の成分(本明細書中「他の成分」と記載することがある)を含んでいてもよい。他の成分としては、例えば、高分子化合物、(A)成分以外のエポキシ樹脂、有機溶剤、酸化防止剤、紫外線吸収剤、光安定剤が挙げられる。他の成分は、いずれも、1種のみを使用してもよく、2種以上を併用してもよい。以下、これら他の成分について順に説明する。
透明樹脂組成物のフィルムを形成するために、高分子化合物(本明細書中「(D)成分」と記載することがある)を使用することが好ましい。本明細書中、「高分子化合物」とは、重量平均分子量(以下「Mw」と記載することがある)が1,000以上である化合物を意味する。このMwは、ゲル浸透クロマトグラフィー(GPC)によって測定することができる。
(i)好ましくはフルオロアルキル基を有するフェノキシ樹脂および/または脂環式構造を有するフェノキシ樹脂であり、
(ii)より好ましくはC1-6フルオロアルキル基を有するフェノキシ樹脂および/またはC3-8シクロアルカン環構造を有するフェノキシ樹脂であり、
(iii)より一層好ましくはC1-6パーフルオロアルキル基を有するフェノキシ樹脂および/またはC5-6シクロアルカン環構造を有するフェノキシ樹脂であり、
(iv)さらに好ましくはトリフルオロメチル基を有するフェノキシ樹脂および/またはシクロヘキサン環構造を有するフェノキシ樹脂であり、
(v)特に好ましくはビスフェノールAF型フェノキシ樹脂および/またはシクロヘキサン環構造を有するフェノキシ樹脂であり、
(vi)最も好ましくはビスフェノールAF型フェノキシ樹脂またはシクロヘキサン環構造を有するフェノキシ樹脂である。
なお、本明細書中、「ビスフェノールAF型フェノキシ樹脂」とは、ビスフェノールAFに由来する構造を有するフェノキシ樹脂を意味する。
本発明の透明樹脂組成物は、本発明の効果を阻害しない範囲で、(A)成分以外のエポキシ樹脂(本明細書中「他のエポキシ樹脂」と記載することがある)を含んでいてもよい。他のエポキシ樹脂は、1種のみを使用してもよく、2種以上を併用してもよい。
本発明の透明樹脂組成物は、有機溶剤を含んでいてもよい。即ち、本発明の透明樹脂組成物は、有機溶剤を含むワニス状の透明樹脂組成物であってもよい。
酸化防止剤としては、例えば、ヒンダードフェノール系酸化防止剤、リン系酸化防止剤、硫黄系酸化防止剤が挙げられる。酸化防止剤の具体例としては、ジブチルヒドロシキトルエン(BHT)、ペンタエリスリトールテトラキス(3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート)(BASFジャパン社製「IRGANOX 1010」)、2,2-チオジエチレンビス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート](BASFジャパン社製「IRGANOX 1035」)、1,3,5-トリス[[3,5-ビス(1,1-ジメチルエチル)-4-ヒドロキシフェニル]メチル]-1,3,5-トリアジン-2,4,6(1H,3H,5H)-トリオン(BASFジャパン社製「IRGANOX 3114」)が挙げられる。
紫外線吸収剤としては、例えば、ベンゾフェノン系紫外線吸収剤、ベンゾトリアゾール系紫外線吸収剤、サリチル酸系紫外線吸収剤、トリアジン系紫外線吸収剤が挙げられる。
本発明の透明樹脂組成物は、透明性が維持される範囲で、無機フィラーを含んでいてもよい。透明性の観点から、本発明の透明樹脂組成物は、無機フィラーを含まないか、または無機フィラーを、透明樹脂組成物の不揮発分に対して30質量%以下の量で含むこと(即ち、無機フィラーの含有量を、透明樹脂組成物の不揮発分に対して30質量%以下に制限すること)が好ましい。無機フィラーの含有量は、透明樹脂組成物の不揮発分に対して、より好ましくは20質量%以下、さらに好ましくは10量%以下、特に好ましくは5質量%以下である。
本発明の透明樹脂組成物から形成される厚さ25μmの透明樹脂組成物層の、波長380~780nmの全光線透過率の平均値は、好ましくは80%以上、より好ましくは85%以上、さらに好ましくは90%以上である。この平均値は、後述の実施例欄に記載する方法によって測定することができる。
本発明の透明樹脂組成物から形成される厚さ25μmの硬化物層の、波長380~780nmの全光線透過率の平均値は、好ましくは80%以上、より好ましくは85%以上、さらに好ましくは90%以上である。この平均値は、後述の実施例欄に記載する方法によって測定することができる。
本発明は、支持体および本発明の透明樹脂組成物から形成された透明樹脂組成物層を含む積層構造を有する樹脂シートも提供する。本発明では保護フィルムを使用してもよい。即ち、本発明の樹脂シートは、支持体、透明樹脂組成物層、および保護フィルムをこの順に含む積層構造を有していてもよい。支持体と透明樹脂組成物層との間、および透明樹脂組成物層と保護フィルムとの間に、他の層(例えば、離型層、接着層)が存在していてもよい。
本発明は、本発明の透明樹脂組成物により形成された硬化物層を含む電子デバイスも提供する。電子デバイスとしては、例えば、LEDデバイス、透明FPC等が挙げられる。
<(A)成分:フルオロアルキル基および/または脂環式構造を有するエポキシ樹脂>
「YX7760」(三菱ケミカル社製、ビスフェノールAF型エポキシ樹脂、エポキシ当量:245g/eq)
「EHPE3150」(ダイセル社製、シクロヘキサン環構造を有するエポキシ樹脂、エポキシ当量:180g/eq)
「ZX-1059」(新日鉄住金化学社製、ビスフェノールA型エポキシ樹脂(50%)およびビスフェノールF型エポキシ樹脂(50%)の混合物、エポキシ当量:165g/eq)
「DXC」(JNC社製、5,5-ジメチル-4-(プロパン-2-イル)-1,3-ジオキサン-2-オン、CAS番号:32368-14-2)
「エチレンカーボネート」(東京化成工業社製、1,3-ジオキソラン-2-オン、CAS番号:96-49-1)
「DEDPO」(JNC社製、5,5-ジエチル-1,3-ジオキサン-2-オン、CAS番号:13423-63-7)
「TBP-DA」(北興化学工業社製、テトラブチルホスホニウムデカン酸塩)
「YX7200B35」(三菱ケミカル社製、ビフェニル構造およびビスフェノールTMCに由来する構造を有するフェノキシ樹脂の溶液、有機溶剤:メチルエチルケトン、不揮発分:35%、重量平均分子量:30,000、エポキシ当量:9,000g/eq)
「シクロヘキサノン」(関東化学社製)
(D)成分の溶液「YX7200B35」23部((D)成分:8.05部)、(A)成分「YX7760」18部、および(B)成分「DXC」1.4部を混合し、得られた混合物を加熱して、(A)成分および(B)成分を溶解させた。そこへ、(C)成分「TBP-DA」0.36部を混合して、ワニス状の透明樹脂組成物を調製した。
(A)成分「YX7760」18部の代わりに、(A)成分「EHPE3150」18部を使用したこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(B)成分「DXC」の使用量を1.4部から3.0部に変更したこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(B)成分「DXC」1.4部の代わりに、(B)成分「エチレンカーボネート」(1,3-ジオキサン-2-オン)1.4部を使用したこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(B)成分「DXC」1.4部の代わりに、(B)成分「DEDPO」(5,5-ジエチル-1,3-ジオキサン-2-オン)1.4部を使用したこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(D)成分の溶液「YX7200B35」を使用せず、(B)成分「DXC」の使用量を1.4部から1.0部に変更し、および有機溶剤「シクロヘキサノン」4.0部を使用したこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(B)成分「DXC」(5,5-ジメチル-4-(プロパン-2-イル)-1,3-ジオキサン-2-オン)を使用しなかったこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(A)成分「YX7760」18部の代わりに、他のエポキシ樹脂「ZX-1059」18部を使用したこと以外は実施例1と同様にして、ワニス状の透明樹脂組成物を調製した。
(1)評価用サンプルの作製
実施例または比較例で作製したワニス状の透明樹脂組成物を、ノンシリコーン系離型剤で処理したPETフィルム(藤森工業社製「NSH」、厚さ:50μm)の離型層上に、乾燥後の透明樹脂組成物層の厚さが25μmとなるようにダイコーターにて塗布し、100℃で5分乾燥して、透明樹脂組成物層を形成し、「PETフィルム/透明樹脂組成物層」の積層構造を有する樹脂シートを得た。
「(1)評価用サンプルの作製」で得られた「PETフィルム/透明樹脂組成物層」の積層構造を有する樹脂シートおよび「硬化物層/スライドガラス」の積層構造を有する積層体を、φ60mm積分球を装着したファイバ式分光光度計(大塚電子社製「MCPD-7700」)を用いて、積分球とサンプルの距離を30mmとし、全光線透過率を測定した。樹脂シートの測定では、樹脂シートの作製に使用したPETフィルムをリファレンスとして使用し、積層体の測定では、積層体の作製に使用したスライドガラスをリファレンスとして使用して、透明樹脂組成物層および硬化物層の全光線透過率の平均値を、透明性の指標として算出した。結果を下記表1に記載する。なお、透明樹脂組成物層および硬化物層の全光線透過率の平均値は同じであったため、下記表1では一つの値のみを記載した。
「(1)評価用サンプルの作製」で得られた積層体を180℃のオーブンにて2時間静置させた後、上記ファイバ式分光光度計を用いて、積分球とサンプルの距離を30mmとし、リファレンスは空気とし、視野角2度、光源D65にて色演算を実施し、L*a*b*表色系のb*を算出し、下記基準で耐黄変性を評価した。結果を下記表1に記載する。(耐黄変性の評価基準)
良好(○):b*が1.0未満
不良(×):b*が1.0以上
実施例または比較例で作製したワニス状の透明樹脂組成物を、PETフィルム(アズワン社製「ルミラーフィルム 188μm」)上に、乾燥後の透明樹脂組成物層の厚さが25μmとなるようにダイコーターにて塗布し、100℃で5分乾燥して、「PETフィルム/透明樹脂組成物層」の積層構造を有する樹脂シートを得た。
(反り抑制の評価基準)
良好(○):反りの高さが25mm未満
不良(×):反りの高さが25mm以上
Claims (10)
- 以下の(A)成分~(C)成分:
(A)フルオロアルキル基および/または脂環式構造を有するエポキシ樹脂、
(B)環状カーボネート、並びに
(C)硬化促進剤、
を含む透明樹脂組成物。 - (B)成分が、5員の環状カーボネートおよび/または6員の環状カーボネートである請求項1に記載の透明樹脂組成物。
- (B)成分の含有量が、透明樹脂組成物の不揮発分に対して、0.1~20質量%である請求項1または2に記載の透明樹脂組成物。
- さらに高分子化合物を含む請求項1に記載の透明樹脂組成物。
- 透明樹脂組成物から形成される厚さ25μmの透明樹脂組成物層の、波長380~780nmの全光線透過率の平均値が80%以上である請求項1に記載の透明樹脂組成物。
- 透明樹脂組成物から形成される厚さ25μmの硬化物層の、波長380~780nmの全光線透過率の平均値が80%以上である請求項1に記載の透明樹脂組成物。
- 支持体および請求項1に記載の透明樹脂組成物により形成された透明樹脂組成物層とを含む積層構造を有する樹脂シート。
- 透明樹脂組成物層の、波長380~780nmの全光線透過率の平均値が80%以上である請求項7に記載の樹脂シート。
- 請求項1に記載の透明樹脂組成物により形成された硬化物層を含む電子デバイス。
- 硬化物層の、波長380~780nmの全光線透過率の平均値が80%以上である請求項9に記載の電子デバイス。
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JPH09194565A (ja) * | 1996-01-24 | 1997-07-29 | Sumitomo Bakelite Co Ltd | 環状カーボナート樹脂組成物及びその硬化物 |
JPH10182812A (ja) * | 1996-12-24 | 1998-07-07 | Sumitomo Bakelite Co Ltd | ノルボルナン環状カーボナート樹脂組成物及び硬化物 |
JPH11116566A (ja) * | 1997-10-14 | 1999-04-27 | Sumitomo Bakelite Co Ltd | 環状カーボナート樹脂組成物及びその硬化物 |
WO2015068787A1 (ja) * | 2013-11-08 | 2015-05-14 | 味の素株式会社 | ハイドロタルサイトを含有する封止用樹脂組成物及び封止用シート |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH09194565A (ja) * | 1996-01-24 | 1997-07-29 | Sumitomo Bakelite Co Ltd | 環状カーボナート樹脂組成物及びその硬化物 |
JPH10182812A (ja) * | 1996-12-24 | 1998-07-07 | Sumitomo Bakelite Co Ltd | ノルボルナン環状カーボナート樹脂組成物及び硬化物 |
JPH11116566A (ja) * | 1997-10-14 | 1999-04-27 | Sumitomo Bakelite Co Ltd | 環状カーボナート樹脂組成物及びその硬化物 |
WO2015068787A1 (ja) * | 2013-11-08 | 2015-05-14 | 味の素株式会社 | ハイドロタルサイトを含有する封止用樹脂組成物及び封止用シート |
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