WO2023145438A1 - 熱伝導性付加硬化型シリコーン組成物、及びその硬化物 - Google Patents
熱伝導性付加硬化型シリコーン組成物、及びその硬化物 Download PDFInfo
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- WO2023145438A1 WO2023145438A1 PCT/JP2023/000506 JP2023000506W WO2023145438A1 WO 2023145438 A1 WO2023145438 A1 WO 2023145438A1 JP 2023000506 W JP2023000506 W JP 2023000506W WO 2023145438 A1 WO2023145438 A1 WO 2023145438A1
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- WO
- WIPO (PCT)
- Prior art keywords
- group
- curable silicone
- thermally conductive
- conductive addition
- silicone composition
- Prior art date
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- 229920001296 polysiloxane Polymers 0.000 title claims abstract description 96
- 239000000203 mixture Substances 0.000 title claims abstract description 86
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 35
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 21
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 229920006136 organohydrogenpolysiloxane Polymers 0.000 claims abstract description 13
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229930195735 unsaturated hydrocarbon Natural products 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 150000002989 phenols Chemical class 0.000 claims abstract description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 37
- -1 phenol compound Chemical class 0.000 claims description 28
- 125000004122 cyclic group Chemical group 0.000 claims description 14
- 238000013006 addition curing Methods 0.000 claims description 12
- 229910052731 fluorine Inorganic materials 0.000 claims description 12
- 125000001153 fluoro group Chemical group F* 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 125000005843 halogen group Chemical group 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 4
- 125000006165 cyclic alkyl group Chemical group 0.000 claims description 4
- 125000006575 electron-withdrawing group Chemical group 0.000 claims description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 4
- 150000002830 nitrogen compounds Chemical class 0.000 claims description 4
- 150000002903 organophosphorus compounds Chemical class 0.000 claims description 4
- 125000003367 polycyclic group Chemical group 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 125000004434 sulfur atom Chemical group 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 3
- 239000002683 reaction inhibitor Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 description 14
- 238000002156 mixing Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 238000007259 addition reaction Methods 0.000 description 5
- 125000000962 organic group Chemical group 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- QYLFHLNFIHBCPR-UHFFFAOYSA-N 1-ethynylcyclohexan-1-ol Chemical compound C#CC1(O)CCCCC1 QYLFHLNFIHBCPR-UHFFFAOYSA-N 0.000 description 2
- 125000001731 2-cyanoethyl group Chemical group [H]C([H])(*)C([H])([H])C#N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- DSVRVHYFPPQFTI-UHFFFAOYSA-N bis(ethenyl)-methyl-trimethylsilyloxysilane;platinum Chemical compound [Pt].C[Si](C)(C)O[Si](C)(C=C)C=C DSVRVHYFPPQFTI-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 2
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical compound [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 125000004793 2,2,2-trifluoroethoxy group Chemical group FC(CO*)(F)F 0.000 description 1
- 125000004206 2,2,2-trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 1
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- NECRQCBKTGZNMH-UHFFFAOYSA-N 3,5-dimethylhex-1-yn-3-ol Chemical compound CC(C)CC(C)(O)C#C NECRQCBKTGZNMH-UHFFFAOYSA-N 0.000 description 1
- HBAQYPYDRFILMT-UHFFFAOYSA-N 8-[3-(1-cyclopropylpyrazol-4-yl)-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-3-methyl-3,8-diazabicyclo[3.2.1]octan-2-one Chemical class C1(CC1)N1N=CC(=C1)C1=NNC2=C1N=C(N=C2)N1C2C(N(CC1CC2)C)=O HBAQYPYDRFILMT-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical group 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 229940045985 antineoplastic platinum compound Drugs 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000005998 bromoethyl group Chemical group 0.000 description 1
- 125000004369 butenyl group Chemical group C(=CCC)* 0.000 description 1
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000460 chlorine Chemical group 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000000596 cyclohexenyl group Chemical group C1(=CCCCC1)* 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 125000000131 cyclopropyloxy group Chemical group C1(CC1)O* 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- ZKVLEFBKBNUQHK-UHFFFAOYSA-N helium;molecular nitrogen;molecular oxygen Chemical compound [He].N#N.O=O ZKVLEFBKBNUQHK-UHFFFAOYSA-N 0.000 description 1
- 125000006038 hexenyl group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000006459 hydrosilylation reaction Methods 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000000555 isopropenyl group Chemical group [H]\C([H])=C(\*)C([H])([H])[H] 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- KFIGICHILYTCJF-UHFFFAOYSA-N n'-methylethane-1,2-diamine Chemical compound CNCCN KFIGICHILYTCJF-UHFFFAOYSA-N 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004344 phenylpropyl group Chemical group 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 150000003058 platinum compounds Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 125000005920 sec-butoxy group Chemical group 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
- 125000004213 tert-butoxy group Chemical group [H]C([H])([H])C(O*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
-
- 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
-
- 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
- C08K5/13—Phenols; Phenolates
-
- 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
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
Definitions
- the present invention relates to a thermally conductive addition-curable silicone composition and its cured product.
- a common problem with electronic component packages and power modules is heat generation during operation and the resulting deterioration in performance, and various heat dissipation technologies are used as a means to solve this problem.
- a technique of radiating heat by arranging a cooling member in the vicinity of the heat-generating part and bringing them into close contact with each other to efficiently remove the heat from the cooling member is generally used.
- heat dissipation grease that is thin and compressible and has excellent penetrability into the gap between the heat generating part and the cooling member is suitable from the viewpoint of heat dissipation performance.
- thermal grease by compressing to the desired thickness and then heating and hardening, it is difficult for the thermal grease to flow out (pumping out) due to expansion and contraction due to the thermal history of repeated heat generation and cooling of the heat generating part.
- Addition-curing thermal greases are particularly useful because they can increase the reliability of modules (eg, US Pat.
- JP-A-2002-327116 JP-A-2004-130646 JP 2009-234112 A Japanese Patent Application Laid-Open No. 2009-209230 JP 2010-095730 A JP 2008-031336 A Japanese Patent Application Laid-Open No. 2007-177001 Japanese Patent Application Laid-Open No. 2008-260798 JP 2009-209165 A JP 2016-053140 A
- an object of the present invention is to provide a thermally conductive addition-curable silicone composition with excellent heat dissipation properties.
- the present invention provides a thermally conductive addition-curable silicone composition, (A) an organopolysiloxane having at least one aliphatic unsaturated hydrocarbon group per molecule and a kinematic viscosity at 25°C of 60 to 100,000 mm 2 /s; (B) a phenolic compound: an amount of 0.01 to 10% by mass based on the total composition; (C) silver powder: an amount of 10 to 98% by mass based on the total composition; (D) an organohydrogenpolysiloxane having two or more silicon-bonded hydrogen atoms in one molecule: an effective amount sufficient for the composition to form a cured product; (E) a platinum group metal catalyst: an effective amount;
- a thermally conductive addition-curable silicone composition is provided comprising:
- Such a thermally conductive addition-curable silicone composition is excellent in heat dissipation.
- the component (B) is preferably a phenol compound represented by the following general formula (1A).
- R 1 represents a hydrogen atom, a halogen atom, a cyano group, or a hydroxyl group.
- R 3 is a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms or a phenyl group, and each Xf is independently substituted with a hydrogen atom, a halogen atom or a fluorine atom having 1 to 10 carbon atoms.
- Each ring ZZ independently represents an aromatic monocyclic or polycyclic ring having 3 to 20 carbon atoms, and the carbon atoms of the ring ZZ are substituted with a nitrogen atom, an oxygen atom, or a sulfur atom.
- ka represents an integer of 0 to 2.
- kb and kd represent 1 or 2.
- kc and ke represent integers of 0 to 2.
- Such a thermally conductive addition-curable silicone composition is more excellent in heat dissipation.
- the component (B) is preferably a phenol compound represented by the following general formula (1B).
- R 1 , R 2 and R 3 are the same as above.
- Such a thermally conductive addition-curable silicone composition is more reliably excellent in heat dissipation.
- the average particle size of the component (C) is 0.01 to 300 ⁇ m.
- the resulting composition is uniform, does not have an excessively high viscosity, and has excellent extensibility.
- (F) one or more addition curing reaction inhibitors selected from the group consisting of acetylene compounds, nitrogen compounds, organic phosphorus compounds, oxime compounds, and organic chloro compounds, in an effective amount. is preferred.
- the thermally conductive addition-curable silicone composition described above is sandwiched between two silicon plates having a diameter of 12.7 mm and heated at 125° C. for 1 hour under a pressure of 0.14 MPa.
- a test piece for thermal resistance measurement was prepared, the thermal resistance value of the thermally conductive addition-curable silicone cured product was measured using a thermal conductivity measuring device, and the thickness of the test piece was measured using a microgauge.
- the thickness of the thermally conductive addition-curable silicone cured product is calculated from the difference between the thickness of the silicone plate measured in advance and the thickness of the thermally conductive addition-curable silicone cured product.
- Thermal conductivity obtained by deriving the thermal conductivity of the cured thermally conductive addition-curable silicone product from the thermal resistance value (mm 2 K/W) of the cured thermally conductive addition-curable silicone product ( ⁇ m) is 7.0 W/m ⁇ K or more.
- Such a thermally conductive addition-curable silicone cured product has excellent heat dissipation.
- the thermally conductive addition-curable silicone composition of the present invention achieves high thermal conductivity by blending a phenolic compound and silver powder. As a result, excellent heat dissipation performance can be exhibited by mounting in an electronic component package or a power module.
- the present inventors have conducted intensive research to achieve the above objects, and as a result, identified an aliphatic unsaturated hydrocarbon group-containing organopolysiloxane, a phenolic compound, silver powder, an organohydrogenpolysiloxane, and a platinum group metal catalyst.
- the inventors have found that a thermally conductive addition-curable silicone composition with excellent heat dissipation can be obtained by blending an amount of these compounds, and have completed the present invention.
- the present invention provides a thermally conductive addition-curable silicone composition
- A an organopolysiloxane having at least one aliphatic unsaturated hydrocarbon group per molecule and a kinematic viscosity at 25°C of 60 to 100,000 mm 2 /s
- B a phenolic compound: an amount of 0.01 to 10% by mass based on the total composition
- C silver powder: an amount of 10 to 98% by mass based on the total composition
- D an organohydrogenpolysiloxane having two or more silicon-bonded hydrogen atoms in one molecule: an effective amount sufficient for the composition to form a cured product
- E a platinum group metal catalyst: an effective amount
- a thermally conductive addition-curable silicone composition comprising:
- thermally Conductive Addition-Cure Silicone Composition The thermally conductive addition-curable silicone composition of the present invention comprises components (A) to (E) described later, and, if necessary, component (F) and other components. It contains Each component will be described in detail below.
- Component (A) has at least 1, preferably 1 to 100, more preferably 2 to 50 aliphatic unsaturated hydrocarbon groups in one molecule, and has a kinematic viscosity at 25°C of 60 to 100,000 mm 2 /s.
- the aliphatic unsaturated hydrocarbon group is preferably a monovalent hydrocarbon group having 2 to 8 carbon atoms, more preferably 2 to 6 carbon atoms, and more preferably an alkenyl group, having an aliphatic unsaturated bond.
- alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, hexenyl, cyclohexenyl, and octenyl groups.
- a vinyl group is particularly preferred.
- the aliphatic unsaturated hydrocarbon group may be bonded to either a silicon atom at the end of the molecular chain, a silicon atom in the middle of the molecular chain, or both.
- the organic group other than the aliphatic unsaturated hydrocarbon group, which is bonded to the silicon atom of the organopolysiloxane has 1 to 18 carbon atoms, preferably 1 to 10 carbon atoms, and more preferably 1 to 8 carbon atoms. It is a substituted or substituted monovalent hydrocarbon group.
- alkyl groups such as methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, hexyl group, cyclohexyl group, octyl group, nonyl group, decyl group;
- Aryl groups such as phenyl group, tolyl group, xylyl group and naphthyl group; aralkyl groups such as benzyl group, phenylethyl group and phenylpropyl group; substituted with a halogen atom, a cyano group, etc., such as a chloromethyl group, a chloropropyl group, a bromoethyl group, a trifluoropropyl group, a cyanoethyl group, and the like.
- the organopolysiloxane has a kinematic viscosity at 25° C. of 60 to 100,000 mm 2 /s, preferably 100 to 30,000 mm 2 /s. If the kinematic viscosity is less than 60 mm 2 /s, the physical properties of the thermally conductive addition-curable silicone composition are degraded, and if it exceeds 100,000 mm 2 /s, it is Extensibility is poor.
- kinematic viscosity is a value at 25°C measured with an Ubbelohde-type Ostwald viscometer (hereinafter the same).
- the molecular structure of the organopolysiloxane is not particularly limited as long as it has the properties described above. be done.
- it preferably has a linear structure in which the main chain consists of repeating diorganosiloxane units and both ends of the molecular chain are blocked with triorganosiloxy groups.
- the organopolysiloxane having a linear structure may partially have a branched structure or a cyclic structure.
- the blending amount of component (A) is preferably 1.5 to 89% by mass, more preferably 1.7 to 50% by mass, and even more preferably 2 to 20% by mass, based on the total composition. If it is 89% by mass or less, the thermal conductivity is not poor, and if it is 1.5% by mass or more, the viscosity of the composition does not increase more than necessary and workability does not deteriorate.
- the organopolysiloxane can be used singly or in combination of two or more.
- Component (B) is a phenolic compound that is added as an additive to the thermally conductive addition-curable silicone composition.
- the phenol compound is preferably a phenol compound represented by the following general formula (1A).
- 1A a phenol compound represented by the following general formula
- R 1 represents a hydrogen atom, a halogen atom, a cyano group, or a hydroxyl group.
- R 3 is a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms or a phenyl group, and each Xf is independently substituted with a hydrogen atom, a halogen atom or a fluorine atom having 1 to 10 carbon atoms.
- Each ring ZZ independently represents an aromatic monocyclic or polycyclic ring having 3 to 20 carbon atoms, and the carbon atoms of the ring ZZ are substituted with a nitrogen atom, an oxygen atom, or a sulfur atom.
- ka represents an integer of 0 to 2.
- kb and kd represent 1 or 2.
- kc and ke represent integers of 0 to 2.
- linear, branched or cyclic (ka+2)-valent hydrocarbon group having 1 to 20 carbon atoms in Az include the following. (In the formula, broken lines indicate bonds.)
- the linear, branched, or cyclic (ka+2)-valent fluorinated hydrocarbon group of Az having 1 to 20 carbon atoms is specifically , substituted with a fluorine atom can be exemplified.
- Az preferably has 2 to 18 carbon atoms, more preferably 3 to 16 carbon atoms, and still more preferably 4 to 14 carbon atoms. It is also preferred that a portion of —CH 2 — constituting the hydrocarbon group is replaced with —Si(R 2 R 3 )— or —Si(R 2 R 3 )—O—.
- linear, branched or cyclic alkyl groups having 1 to 6 carbon atoms for R 2 and R 3 include methyl, ethyl, propyl, isopropyl, n-butyl and sec-butyl. group, tert-butyl group, n-pentyl group, n-hexyl group, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group and the like.
- linear, branched or cyclic monovalent hydrocarbon groups of Xf which may be substituted with fluorine atoms having 1 to 10 carbon atoms include methyl, ethyl, propyl, isopropyl, n- Alkyl groups such as butyl group, sec-butyl group, tert-butyl group, cyclopropyl group and cyclobutyl group, trifluoromethyl group, 2,2,2-trifluoroethyl group and the like can be mentioned.
- alkoxy group of Xf having 1 to 10 carbon atoms which may be substituted with a fluorine atom include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, an n-butoxy group, a sec-butoxy group and a tert-butoxy group. , cyclopropoxy group, trifluoromethoxy group, 2,2,2-trifluoroethoxy group and the like.
- aromatic monocyclic or polycyclic ring ZZ having 3 to 20 carbon atoms include the following. Ring ZZ may further have a substituent as described below.
- a phenol compound represented by the following general formula (1B) is particularly preferable as the phenol compound represented by the general formula (1A).
- R 1 , R 2 and R 3 are the same as above.
- the amount of component (B) is 0.01 to 10% by mass of the total composition, preferably 0.03 to 5% by mass, and more preferably 0.05 to 1.0% by mass. preferable. If the amount is less than 0.01% by mass, the effect of improving the heat dissipation of the thermally conductive addition-curable silicone composition is poor. It is uneconomical and uneconomical.
- Component (C) is silver powder.
- the method for producing the silver powder is not particularly limited, and examples thereof include an electrolysis method, a pulverization method, a heat treatment method, an atomization method, a reduction method and the like.
- the shape is not particularly limited and may be flake-like, spherical, granular, amorphous, dendritic, needle-like, or the like.
- the range is preferably 0.01 to 300 ⁇ m, preferably 0.1 to 100 ⁇ m, more preferably 1 to 50 ⁇ m.
- the average particle diameter can be determined as a volume-based average value (or median diameter) in particle size distribution measurement by a laser beam diffraction method, for example.
- component (C) can be used alone or in combination of two or more, and the ratio is not particularly limited and is arbitrary.
- the amount of component (C) is 10 to 98% by mass, preferably 70 to 97% by mass, more preferably 80 to 95% by mass, based on the total composition. If the amount is more than 98% by mass, the viscosity of the composition may be significantly increased and the workability may be deteriorated.
- Component (D) is an organohydrogenpolysiloxane having two or more silicon-bonded hydrogen atoms in one molecule, i.e., silicon-bonded hydrogen atoms (SiH groups) in one molecule. It is an organohydrogenpolysiloxane having 2 or more, particularly preferably 2 to 100, more preferably 2 to 50. In the organohydrogenpolysiloxane, the SiH groups in the molecule undergo an addition reaction with the unsaturated aliphatic hydrocarbon groups of component (A) in the presence of a platinum group metal catalyst to form a crosslinked structure. I wish I had.
- the molecular structure of the organohydrogenpolysiloxane is not particularly limited as long as it has the properties described above. structure and the like. A linear structure and a cyclic structure are preferred.
- the organohydrogenpolysiloxane has a kinematic viscosity at 25° C. of preferably 1 to 1,000 mm 2 /s, more preferably 10 to 300 mm 2 /s. If the kinematic viscosity is 1 mm 2 /s or more, the physical properties of the thermally conductive addition-curable silicone composition will not deteriorate. The extensibility of the silicone composition becomes good.
- organic groups bonded to the silicon atoms of the organohydrogenpolysiloxane include unsubstituted or substituted monovalent hydrocarbon groups other than aliphatic unsaturated hydrocarbon groups.
- it is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 12 carbon atoms, preferably 1 to 10 carbon atoms.
- alkyl groups such as methyl group, ethyl group, propyl group, butyl group, hexyl group and dodecyl group, aryl groups such as phenyl group, aralkyl groups such as 2-phenylethyl group and 2-phenylpropyl group, these hydrogen
- halogen atoms such as fluorine, bromine, and chlorine
- cyano groups epoxy ring-containing organic groups (glycidyl groups or glycidyloxy group-substituted alkyl groups), etc., such as chloromethyl group and chloropropyl bromoethyl, trifluoropropyl, cyanoethyl, 2-glycidoxyethyl, 3-glycidoxypropyl, and 4-glycidoxybutyl groups.
- a methyl group and a trifluoropropyl group are preferred.
- the organohydrogenpolysiloxane may be used singly or in combination of two or more.
- the amount of component (D) organohydrogenpolysiloxane to be blended is an effective amount sufficient for the composition to form a cured product, preferably the total number of aliphatic unsaturated hydrocarbon groups in component (A).
- the number of SiH groups in the component (D) is 0.5 to 10, more preferably 0.7 to 7.5, more preferably 1.0 to 5.0. . If the amount of component (D) is at least the above lower limit, the addition reaction will proceed sufficiently and crosslinking will be sufficient. Moreover, if it is below the said upper limit, a crosslinked structure will not become uneven and the storage stability of a composition will not deteriorate.
- Component (E) is a platinum group metal catalyst and functions to promote the addition reaction of the above components.
- the platinum group metal catalyst conventionally known ones used for addition reactions can be used.
- platinum-based, palladium-based, and rhodium-based catalysts can be used, but platinum or platinum compounds, which are relatively easily available, are preferred. Examples thereof include simple platinum, platinum black, chloroplatinic acid, platinum-olefin complexes, platinum-alcohol complexes, and platinum coordination compounds.
- the platinum group metal catalysts may be used singly or in combination of two or more.
- the amount of component (E) to be added should be an effective amount as a catalyst, that is, an effective amount necessary to promote the addition reaction and cure the thermally conductive addition-curable silicone composition of the present invention. It is preferably 0.1 to 500 ppm, more preferably 1 to 200 ppm, and still more preferably 10 to 100 ppm based on the mass of platinum group metal atoms, relative to the entire composition. If the amount of the catalyst is at least the above lower limit, the effect as a catalyst can be obtained, and if it is at most the above upper limit, the catalytic effect is sufficient and economical.
- thermally conductive addition-curable silicone composition of the present invention may optionally contain the following optional components.
- Component (F) is one or more addition curing reactions selected from the group consisting of acetylene compounds, nitrogen compounds, organic phosphorus compounds, oxime compounds, and organic chloro compounds that inhibit the progress of hydrosilylation reactions at room temperature. It is a regulator and can be added to prolong shelf life and pot life.
- addition curing reaction controller conventionally known addition curing reaction controllers used in addition curing silicone compositions can be used.
- acetylene compounds such as acetylene alcohols (eg, ethynylmethyldecylcarbinol, 1-ethynyl-1-cyclohexanol, 3,5-dimethyl-1-hexyn-3-ol), tributylamine, tetra
- nitrogen compounds such as methylethylenediamine and benzotriazole
- organic phosphorus compounds such as triphenylphosphine, oxime compounds, and organic chloro compounds.
- the amount may be an effective amount, preferably 0.05 to 10 parts by mass, more preferably 0.07 to 5 parts by mass, based on 100 parts by mass of component (A), More preferably, it is 0.1 to 2 parts by mass.
- the amount of the reaction inhibitor is 0.05 parts by mass or more, the desired sufficient shelf life and pot life can be obtained, and when the amount is 10 parts by mass or less, the curability of the silicone composition does not deteriorate.
- reaction control agent may be diluted with organo(poly)siloxane, toluene, or the like in order to improve dispersibility in the silicone composition.
- the thermally conductive addition-curable silicone composition of the present invention may contain a non-reactive organo(poly)siloxane such as methylpolysiloxane in order to adjust the strength and viscosity of the composition.
- a non-reactive organo(poly)siloxane such as methylpolysiloxane
- one or more conventionally known thermally conductive fillers other than silver may be used in combination.
- hydrolyzable organopolysiloxanes, various modified silicones, and hydrolyzable organosilanes may be blended for the purpose of improving the filling properties of the thermally conductive filler or imparting adhesiveness to the composition.
- a solvent may be added to adjust the viscosity of the composition.
- antioxidants such as 2,6-di-tert-butyl-4-methylphenol may optionally be contained in order to prevent deterioration of the thermally conductive addition-curable silicone composition.
- dyes, pigments, flame retardants, anti-settling agents, thixotropic agents, etc. can be blended as needed.
- Step of Preparing the Thermally Conductive Addition Curing Silicone Composition The method for producing the thermally conductive addition curing silicone composition of the present invention will be described.
- the method for producing the thermally conductive addition-curable silicone composition of the present invention is not particularly limited, but the above-described components (A) to (E), and optionally component (F) and other components may be used.
- component (A) to (E), and optionally component (F) and other components for example, Trimix, Twinmix, and Planetary Mixer (both registered trademarks of Inoue Seisakusho Co., Ltd. mixer), Using a mixer such as Ultra Mixer (registered trademark of mixer manufactured by Mizuho Kogyo Co., Ltd.), Hibismix (registered trademark of mixer manufactured by Primix Co., Ltd.), etc., at 25 ° C. for usually 3 minutes to 24 hours, preferably A method of mixing for 5 minutes to 12 hours, particularly preferably 10 minutes to 6 hours, can be used. Further, degassing may be performed during mixing, and mixing may be performed while heating in the range of 40 to 170°C.
- Ultra Mixer registered trademark of mixer manufactured by Mizuho Kogyo Co., Ltd.
- Hibismix registered trademark of mixer manufactured by Primix Co., Ltd.
- degassing may be performed during mixing, and mixing may be performed while heating in the range of 40 to 170°C.
- components (A) and (C) are preliminarily mixed at 70°C, and then components (B), (D) and (E) are mixed at 25°C.
- a silicone composition is preferable from the viewpoint of exhibiting good thermal conductivity.
- the optional component (F) after mixing the (A) and (C) components in advance, the (F) component is mixed, and then the (B), (D) and (E) components are preferably mixed.
- the thermally conductive addition-curable silicone composition of the present invention has a viscosity measured at 25° C. of preferably 10 to 1,000 Pa ⁇ s, more preferably 20 to 700 Pa ⁇ s, still more preferably 40 to 600 Pa ⁇ s. is s. If the viscosity is 10 Pa ⁇ s or more, it is not difficult to maintain the shape, and workability such as precipitation of the silver powder does not deteriorate. Further, if the viscosity is 1,000 Pa ⁇ s or less, workability is not deteriorated, such as discharge and coating being not difficult.
- the said viscosity can be obtained by adjusting the compounding quantity of each component mentioned above. Said viscosity can be measured, for example, at 25° C. using a Malcolm viscometer (type PC-1T).
- the cured product of the thermally conductive addition-curable silicone composition of the present invention usually has a thermal conductivity of 0.5 to 100 W/m ⁇ K. It preferably has a thermal conductivity of 7.0 W/m ⁇ K or more in order to exhibit performance.
- the curing conditions for heat-curing the thermally conductive addition-curable silicone composition of the present invention are not particularly limited, but usually 80 to 200° C., preferably 100 to 180° C., 15 minutes to 4 hours, It is preferably 30 minutes to 2 hours.
- the thermally conductive addition-curable silicone cured product of the present invention is prepared by sandwiching the thermally conductive addition-curable silicone composition described above between two silicon plates having a diameter of 12.7 mm and applying a pressure of 0.14 MPa. Heat and cure at 125 ° C. for 1 hour in the state, prepare a test piece for thermal resistance measurement, measure the thermal resistance value of the thermally conductive addition-curable silicone cured product using a thermal conductivity measurement device, , the thickness of the test piece is measured with a microgauge, and the thickness of the thermally conductive addition-curable silicone cured product is calculated from the difference from the previously measured thickness of the silicon plate.
- the thickness of the cured conductive addition-curable silicone product ( ⁇ m) ⁇ the thermal resistance value of the cured thermally conductive addition-curable silicone product (mm 2 K/W) gives the heat of the cured thermally conductive addition-curable silicone product. It is preferable that the thermal conductivity is 7.0 W/m ⁇ K or more when the conductivity is derived.
- the kinematic viscosity indicates the value at 25° C. measured by an Ubbelohde-type Ostwald viscometer.
- thermally conductive addition-curable silicone composition of the present invention were prepared.
- Component A-1 Dimethylpolysiloxane having both ends blocked with dimethylvinylsilyl groups and a kinematic viscosity at 25°C of 600 mm 2 /s
- A-2 Both ends blocked with dimethylvinylsilyl groups, 25°C
- A-3 having a kinematic viscosity of 30,000 mm 2 /s at 25° C.:
- Organopolysiloxane having a kinematic viscosity of 800 mm 2 /s at 25° C. represented by the following formula (2)
- B-1 a phenol compound represented by the following formula (3)
- B-2 a phenol compound represented by the following formula (4)
- B-3 a phenol compound represented by the following formula (5)
- B-4 a phenol compound represented by the following formula (6)
- B-5 a phenol compound represented by the following formula (7)
- Component C-1 Flake-like silver powder with an average particle size of 15 ⁇ m, a tap density of 4.0 g/mL, and a specific surface area of 0.5 m 2 /g C-2: an average particle size of 4 ⁇ m, a tap density of 2.2 g/mL , flaky silver powder having a specific surface area of 2.0 m 2 /g C-3: average particle diameter of 4 ⁇ m, tap density of 2.3 g/mL, flaky silver powder having a specific surface area of 0.9 m 2 /g C-4: average grain Flake-like silver powder C-5 with a diameter of 2 ⁇ m, a tap density of 2.4 g/mL, and a specific surface area of 0.9 m 2 /g: an average particle diameter of 3 ⁇ m, a tap density of 6.9 g/mL, and a specific surface area of 0.2 m 2 /g spherical silver powder
- E-1 A solution of a platinum-divinyltetramethyldisiloxane complex dissolved in the same dimethylpolysiloxane as A-1 above (platinum atom content: 1% by mass)
- E-2 Solution of platinum-divinyltetramethyldisiloxane complex dissolved in ethanol (platinum atom content: 3% by mass)
- thermally conductive addition-curable silicone composition obtained by the above method was measured for viscosity and thermal conductivity according to the following methods. The results are shown in Tables 1-4.
- thermal conductivity of the thermally conductive addition-curable silicone cured product was derived from the following formula.
- the thermally conductive addition-curable silicone composition of the present invention achieves high thermal conductivity by blending a phenolic compound and silver powder. As a result, excellent heat dissipation performance can be exhibited by mounting in an electronic component package or a power module.
- the present invention is not limited to the above embodiments.
- the above-described embodiment is an example, and any device having substantially the same configuration as the technical idea described in the claims of the present invention and exhibiting the same effect is the present invention. included in the technical scope of
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Abstract
Description
(A)1分子中に少なくとも1個の脂肪族不飽和炭化水素基を有し、25℃での動粘度が60~100,000mm2/sであるオルガノポリシロキサン、
(B)フェノール化合物:組成物全体に対し0.01~10質量%となる量、
(C)銀粉末:組成物全体に対し10~98質量%となる量、
(D)1分子中に2個以上のケイ素原子に結合した水素原子を有するオルガノハイドロジェンポリシロキサン:組成物が硬化物を形成するのに足る有効量、
(E)白金族金属触媒:有効量、
を含むものである熱伝導性付加硬化型シリコーン組成物を提供する。
(A)1分子中に少なくとも1個の脂肪族不飽和炭化水素基を有し、25℃での動粘度が60~100,000mm2/sであるオルガノポリシロキサン、
(B)フェノール化合物:組成物全体に対し0.01~10質量%となる量、
(C)銀粉末:組成物全体に対し10~98質量%となる量、
(D)1分子中に2個以上のケイ素原子に結合した水素原子を有するオルガノハイドロジェンポリシロキサン:組成物が硬化物を形成するのに足る有効量、
(E)白金族金属触媒:有効量、
を含むものである熱伝導性付加硬化型シリコーン組成物である。
本発明の熱伝導性付加硬化型シリコーン組成物は、後述する(A)~(E)成分と、必要によりこれに加えて(F)成分やその他の成分を含有するものである。以下各成分について詳細に説明する。
(A)成分は、1分子中に少なくとも1個、好ましくは1~100個、より好ましくは2~50個の脂肪族不飽和炭化水素基を有し、25℃での動粘度が60~100,000mm2/sであるオルガノポリシロキサンである。
(B)成分はフェノール化合物であり、熱伝導性付加硬化型シリコーン組成物の添加剤として配合されるものである。フェノール化合物としては、下記一般式(1A)で示されるフェノール化合物であることが好ましい。なお、以下の説明中、化学式で表される構造によっては不斉炭素が存在し、エナンチオ異性体(enantiomer)やジアステレオ異性体(diastereomer)が存在し得るものがあるが、その場合は一つの式でそれらの異性体を代表して表す。それらの異性体は単独で用いてもよいし、混合物として用いてもよい。
(C)成分は銀粉末である。銀粉末の製造方法は特に限定されるものではないが、例えば電解法、粉砕法、熱処理法、アトマイズ法、還元法等が挙げられる。また、その形状は、フレーク状、球状、粒状、不定形状、樹枝状、針状等、特に限定されるものではない。
(D)成分は、1分子中に2個以上のケイ素原子に結合した水素原子を有するオルガノハイドロジェンポリシロキサン、即ちケイ素原子に結合した水素原子(SiH基)を1分子中に2個以上、特に好ましくは2~100個、さらに好ましくは2~50個有するオルガノハイドロジェンポリシロキサンである。該オルガノハイドロジェンポリシロキサンは、分子中のSiH基が、上述した(A)成分が有する脂肪族不飽和炭化水素基と白金族金属触媒の存在下に付加反応し、架橋構造を形成できるものであればよい。
(E)成分は白金族金属触媒であり、上述した成分の付加反応を促進するために機能する。白金族金属触媒は、付加反応に用いられる従来公知のものを使用することができる。例えば白金系、パラジウム系、ロジウム系の触媒が挙げられるが、中でも比較的入手しやすい白金又は白金化合物が好ましい。例えば、白金の単体、白金黒、塩化白金酸、白金-オレフィン錯体、白金-アルコール錯体、白金配位化合物等が挙げられる。白金族金属触媒は1種単独でも2種以上を組み合わせて使用してもよい。
(F)成分は室温でのヒドロシリル化反応の進行を抑えるアセチレン化合物、窒素化合物、有機リン化合物、オキシム化合物、及び有機クロロ化合物からなる群より選択される1種以上の付加硬化反応制御剤であり、シェルフライフ、ポットライフを延長させるために添加することができる。該付加硬化反応制御剤は、付加硬化型シリコーン組成物に使用される従来公知の付加硬化反応制御剤を使用することができる。これには、例えば、アセチレンアルコール類(例えば、エチニルメチルデシルカルビノール、1-エチニル-1-シクロヘキサノール、3,5-ジメチル-1-ヘキシン-3-オール)等のアセチレン化合物、トリブチルアミン、テトラメチルエチレンジアミン、ベンゾトリアゾール等の各種窒素化合物、トリフェニルホスフィン等の有機リン化合物、オキシム化合物、有機クロロ化合物等が挙げられる。
本発明の熱伝導性付加硬化型シリコーン組成物は、組成物の強度や粘度を調整するためにメチルポリシロキサン等の反応性を有さないオルガノ(ポリ)シロキサンを含有してもよい。さらに、銀以外の従来公知の熱伝導性充填剤を1種以上併用してもよい。さらに、熱伝導性充填剤の充填性を向上する目的や、組成物に接着性を付与する目的で、加水分解性オルガノポリシロキサンや各種変成シリコーン、加水分解性オルガノシランを配合してもよい。さらに、組成物の粘度を調整するための溶剤を配合してもよい。さらに、熱伝導性付加硬化型シリコーン組成物の劣化を防ぐために、2,6-ジ-tert-ブチル-4-メチルフェノール等の、従来公知の酸化防止剤を必要に応じて含有してもよい。さらに、染料、顔料、難燃剤、沈降防止剤、又はチクソ性向上剤等を、必要に応じて配合することができる。
本発明における熱伝導性付加硬化型シリコーン組成物の製造方法について説明する。本発明における熱伝導性付加硬化型シリコーン組成物の製造方法は特に限定されるものではないが、上述の(A)~(E)成分、必要によりこれに加えて(F)成分やその他の成分を含有する熱伝導性付加硬化型シリコーン組成物を作製する工程を有する。
A-1:両末端がジメチルビニルシリル基で封鎖され、25℃における動粘度が600mm2/sのジメチルポリシロキサン
A-2:両末端がジメチルビニルシリル基で封鎖され、25℃における動粘度が30,000mm2/sのジメチルポリシロキサン
A-3:下記式(2)で示される、25℃における動粘度が800mm2/sのオルガノポリシロキサン
B-1:下記式(3)で示されるフェノール化合物
C-1:平均粒径15μm、タップ密度4.0g/mL、比表面積0.5m2/gのフレーク状銀粉末
C-2:平均粒径4μm、タップ密度2.2g/mL、比表面積2.0m2/gのフレーク状銀粉末
C-3:平均粒径4μm、タップ密度2.3g/mL、比表面積0.9m2/gのフレーク状銀粉末
C-4:平均粒径2μm、タップ密度2.4g/mL、比表面積0.9m2/gのフレーク状銀粉末
C-5:平均粒径3μm、タップ密度6.9g/mL、比表面積0.2m2/gの球状銀粉末
D-1:下記式(8)で示されるメチルハイドロジェンジメチルポリシロキサン
(25℃における動粘度=100mm2/s)
(25℃における動粘度=60mm2/s)
E-1:白金-ジビニルテトラメチルジシロキサン錯体を上記A-1と同じジメチルポリシロキサンに溶解した溶液(白金原子含有量:1質量%)
E-2:白金-ジビニルテトラメチルジシロキサン錯体をエタノールに溶解した溶液(白金原子含有量:3質量%)
熱伝導性付加硬化型シリコーン組成物の調製
上記(A)~(F)成分を、下記表1~4に示す配合量で、下記に示す方法で配合して熱伝導性付加硬化型シリコーン組成物を調製した。なお、表においてSiH/SiViは(A)成分中のアルケニル基の個数の合計に対する(D)成分のSiH基の個数の合計の比である。
0.3リットルのハイビスミックス(プライミクス株式会社製)に、(A)、(C)成分を加え、70℃で1時間混合した。これを40℃以下となるまで冷却した後、(F)、(E)、(D)、及び(B)成分を加え、均一になるように混合し、組成物を調製した。
上記方法で得られた各熱伝導性付加硬化型シリコーン組成物について、下記の方法に従い、粘度、熱伝導率を測定した。結果を表1~4に示す。
各熱伝導性付加硬化型シリコーン組成物の絶対粘度を、マルコム粘度計(タイプPC-1T)を用いて25℃で測定した(ロータAで10rpm、ズリ速度6[1/s])。
直径12.7mmの2枚のシリコン板の間に各熱伝導性付加硬化型シリコーン組成物を挟み込み、0.14MPaの圧力を掛けた状態にて125℃で1時間加熱硬化させ、熱抵抗測定用の試験片を作製し、熱伝導性付加硬化型シリコーン硬化物の熱抵抗値を測定した。さらに、試験片の厚みをマイクロゲージにて測定し、あらかじめ測定しておいたシリコン板の厚さとの差分から熱伝導性付加硬化型シリコーン硬化物の厚さを算出した。その後、下記式から熱伝導性付加硬化型シリコーン硬化物の熱伝導率を導出した。
(熱伝導性付加硬化型シリコーン硬化物の厚さ、μm)÷(熱伝導性付加硬化型シリコーン硬化物の熱抵抗値、mm2・K/W)
なお、熱抵抗測定には、ナノフラッシュ(ニッチェ社製、LFA447)を用いた。
Claims (6)
- 熱伝導性付加硬化型シリコーン組成物であって、
(A)1分子中に少なくとも1個の脂肪族不飽和炭化水素基を有し、25℃での動粘度が60~100,000mm2/sであるオルガノポリシロキサン、
(B)フェノール化合物:組成物全体に対し0.01~10質量%となる量、
(C)銀粉末:組成物全体に対し10~98質量%となる量、
(D)1分子中に2個以上のケイ素原子に結合した水素原子を有するオルガノハイドロジェンポリシロキサン:組成物が硬化物を形成するのに足る有効量、
(E)白金族金属触媒:有効量、
を含むものであることを特徴とする熱伝導性付加硬化型シリコーン組成物。 - 前記(B)成分が下記一般式(1A)で示されるフェノール化合物であることを特徴とする請求項1に記載の熱伝導性付加硬化型シリコーン組成物。
- 前記(C)成分の平均粒径が0.01~300μmであることを特徴とする請求項1から請求項3のいずれか1項に記載の熱伝導性付加硬化型シリコーン組成物。
- さらに、(F)アセチレン化合物、窒素化合物、有機リン化合物、オキシム化合物、及び有機クロロ化合物からなる群より選択される1種以上の付加硬化反応制御剤を有効量含有するものであることを特徴とする請求項1から請求項4のいずれか1項に記載の熱伝導性付加硬化型シリコーン組成物。
- 直径12.7mmの2枚のシリコン板の間に請求項1から請求項5のいずれか1項に記載の熱伝導性付加硬化型シリコーン組成物を挟み込み、0.14MPaの圧力を掛けた状態にて125℃で1時間加熱硬化させ、熱抵抗測定用の試験片を作製し、熱伝導性付加硬化型シリコーン硬化物の熱抵抗値を熱伝導率測定装置を用いて測定し、さらに、前記試験片の厚みをマイクロゲージにて測定し、あらかじめ測定しておいた前記シリコン板の厚さとの差分から前記熱伝導性付加硬化型シリコーン硬化物の厚さを算出し、その後、前記熱伝導性付加硬化型シリコーン硬化物の厚さ(μm)÷前記熱伝導性付加硬化型シリコーン硬化物の熱抵抗値(mm2・K/W)から前記熱伝導性付加硬化型シリコーン硬化物の熱伝導率を導出したときの熱伝導率が7.0W/m・K以上であることを特徴とする熱伝導性付加硬化型シリコーン硬化物。
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