WO2018221637A1 - 熱伝導性ポリシロキサン組成物 - Google Patents
熱伝導性ポリシロキサン組成物 Download PDFInfo
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- WO2018221637A1 WO2018221637A1 PCT/JP2018/020905 JP2018020905W WO2018221637A1 WO 2018221637 A1 WO2018221637 A1 WO 2018221637A1 JP 2018020905 W JP2018020905 W JP 2018020905W WO 2018221637 A1 WO2018221637 A1 WO 2018221637A1
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- component
- thermally conductive
- carbon atoms
- mass
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- -1 polysiloxane Polymers 0.000 title claims abstract description 90
- 239000000203 mixture Substances 0.000 title claims abstract description 86
- 229920001296 polysiloxane Polymers 0.000 title claims abstract description 57
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 28
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 20
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 239000011231 conductive filler Substances 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 37
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- 125000000217 alkyl group Chemical group 0.000 claims description 18
- 239000010954 inorganic particle Substances 0.000 claims description 15
- 229910021485 fumed silica Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 229920002379 silicone rubber Polymers 0.000 claims description 7
- 239000004945 silicone rubber Substances 0.000 claims description 7
- 125000005370 alkoxysilyl group Chemical group 0.000 claims description 5
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 5
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 5
- 125000002015 acyclic group Chemical group 0.000 claims description 4
- 125000003107 substituted aryl group Chemical group 0.000 claims description 4
- 239000000047 product Substances 0.000 description 13
- 238000007665 sagging Methods 0.000 description 12
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 11
- 230000017525 heat dissipation Effects 0.000 description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 229920002050 silicone resin Polymers 0.000 description 7
- 230000009974 thixotropic effect Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 6
- 239000011342 resin composition Substances 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000007259 addition reaction Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002683 reaction inhibitor Substances 0.000 description 3
- 239000005049 silicon tetrachloride Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- QYLFHLNFIHBCPR-UHFFFAOYSA-N 1-ethynylcyclohexan-1-ol Chemical compound C#CC1(O)CCCCC1 QYLFHLNFIHBCPR-UHFFFAOYSA-N 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 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
- CZWLNMOIEMTDJY-UHFFFAOYSA-N hexyl(trimethoxy)silane Chemical compound CCCCCC[Si](OC)(OC)OC CZWLNMOIEMTDJY-UHFFFAOYSA-N 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000007561 laser diffraction method Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000000790 scattering method Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 125000004400 (C1-C12) alkyl group Chemical group 0.000 description 1
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000006039 1-hexenyl group Chemical group 0.000 description 1
- FIADVASZMLCQIF-UHFFFAOYSA-N 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetrazatetrasilocane Chemical compound C[Si]1(C)N[Si](C)(C)N[Si](C)(C)N[Si](C)(C)N1 FIADVASZMLCQIF-UHFFFAOYSA-N 0.000 description 1
- WGGNJZRNHUJNEM-UHFFFAOYSA-N 2,2,4,4,6,6-hexamethyl-1,3,5,2,4,6-triazatrisilinane Chemical compound C[Si]1(C)N[Si](C)(C)N[Si](C)(C)N1 WGGNJZRNHUJNEM-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- RFSBGZWBVNPVNN-UHFFFAOYSA-N 2,4,6-tris(ethenyl)-2,4,6-trimethyl-1,3,5,2,4,6-triazatrisilinane Chemical compound C=C[Si]1(C)N[Si](C)(C=C)N[Si](C)(C=C)N1 RFSBGZWBVNPVNN-UHFFFAOYSA-N 0.000 description 1
- KNVOCSQDAIHOPP-UHFFFAOYSA-N 2-ethynylcyclohexan-1-ol Chemical compound OC1CCCCC1C#C KNVOCSQDAIHOPP-UHFFFAOYSA-N 0.000 description 1
- CEBKHWWANWSNTI-UHFFFAOYSA-N 2-methylbut-3-yn-2-ol Chemical compound CC(C)(O)C#C CEBKHWWANWSNTI-UHFFFAOYSA-N 0.000 description 1
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- ITRFWRDOAWGZFV-UHFFFAOYSA-N 3-[[[dimethyl(3,3,3-trifluoropropyl)silyl]amino]-dimethylsilyl]-1,1,1-trifluoropropane Chemical compound FC(F)(F)CC[Si](C)(C)N[Si](C)(C)CCC(F)(F)F ITRFWRDOAWGZFV-UHFFFAOYSA-N 0.000 description 1
- QYXVDGZUXHFXTO-UHFFFAOYSA-L 3-oxobutanoate;platinum(2+) Chemical compound [Pt+2].CC(=O)CC([O-])=O.CC(=O)CC([O-])=O QYXVDGZUXHFXTO-UHFFFAOYSA-L 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- GJWAPAVRQYYSTK-UHFFFAOYSA-N [(dimethyl-$l^{3}-silanyl)amino]-dimethylsilicon Chemical compound C[Si](C)N[Si](C)C GJWAPAVRQYYSTK-UHFFFAOYSA-N 0.000 description 1
- HIMXYMYMHUAZLW-UHFFFAOYSA-N [[[dimethyl(phenyl)silyl]amino]-dimethylsilyl]benzene Chemical compound C=1C=CC=CC=1[Si](C)(C)N[Si](C)(C)C1=CC=CC=C1 HIMXYMYMHUAZLW-UHFFFAOYSA-N 0.000 description 1
- WYUIWUCVZCRTRH-UHFFFAOYSA-N [[[ethenyl(dimethyl)silyl]amino]-dimethylsilyl]ethene Chemical compound C=C[Si](C)(C)N[Si](C)(C)C=C WYUIWUCVZCRTRH-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920005601 base polymer Polymers 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
- 239000011230 binding agent Substances 0.000 description 1
- 125000004799 bromophenyl group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- SXSNZRHGAMVNJE-UHFFFAOYSA-N chloro-[[[chloromethyl(dimethyl)silyl]amino]-dimethylsilyl]methane Chemical compound ClC[Si](C)(C)N[Si](C)(C)CCl SXSNZRHGAMVNJE-UHFFFAOYSA-N 0.000 description 1
- HEDRZPFGACZZDS-UHFFFAOYSA-N chloroform Substances ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 1
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 125000004966 cyanoalkyl group Chemical group 0.000 description 1
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 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 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 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
- BAAAEEDPKUHLID-UHFFFAOYSA-N decyl(triethoxy)silane Chemical compound CCCCCCCCCC[Si](OCC)(OCC)OCC BAAAEEDPKUHLID-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 125000004212 difluorophenyl group Chemical group 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 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
- 230000006355 external stress Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 125000001207 fluorophenyl group Chemical group 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000006459 hydrosilylation reaction Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000003993 interaction Effects 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
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 239000005055 methyl trichlorosilane Substances 0.000 description 1
- JLUFWMXJHAVVNN-UHFFFAOYSA-N methyltrichlorosilane Chemical compound C[Si](Cl)(Cl)Cl JLUFWMXJHAVVNN-UHFFFAOYSA-N 0.000 description 1
- 125000001421 myristyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- ZSMNRKGGHXLZEC-UHFFFAOYSA-N n,n-bis(trimethylsilyl)methanamine Chemical compound C[Si](C)(C)N(C)[Si](C)(C)C ZSMNRKGGHXLZEC-UHFFFAOYSA-N 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
- 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
- 239000011146 organic particle Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000000913 palmityl 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])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
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000004344 phenylpropyl group Chemical group 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 125000004079 stearyl 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])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])[H] 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000012756 surface treatment agent Substances 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
- 125000003944 tolyl group Chemical group 0.000 description 1
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
- 239000005052 trichlorosilane Substances 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
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- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
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- 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
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- 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
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- C08L2203/00—Applications
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Definitions
- the present invention relates to a thermally conductive polysiloxane composition.
- thermoconductive filler As a thermally conductive filler, it is known to add a material having a higher thermal conductivity than a silicone resin as a binder, such as silica powder, alumina, boron nitride, aluminum nitride, magnesium oxide and the like ( Patent Document 1).
- Patent Document 2 In order to increase the thermal conductivity of the silicone resin composition, it is necessary to fill the thermal conductive filler higher. However, its fillability is limited due to the deterioration of fluidity. For this reason, it is known to improve the filling property by subjecting a thermally conductive filler to surface treatment (Patent Document 2). On the other hand, it is known that thixotropic properties can be imparted and fluidity can be controlled by adding fumed silica to the silicone resin composition (Patent Document 3).
- heat dissipation materials are required to have a small change in hardness over time in order to prevent a decrease in heat dissipation characteristics due to a change in adhesion with electronic equipment over time.
- the problem to be solved by the present invention is to provide a thermally conductive polysiloxane composition that is excellent in applicability because of low viscosity, has no sagging drop after application, and has a small change in hardness over time. It is.
- the inventors of the present invention have focused on the surface treatment agent and additive for the thermally conductive filler, and as a result of various studies, have reached the present invention.
- the gist of the present invention is as follows.
- thermally conductive filler (B) The following general formula (1): (Where R 1 : a group having an alkoxysilyl group having 1 to 4 carbon atoms, R 2 : The following general formula (2): Wherein R 4 is each independently a monovalent hydrocarbon group having 1 to 12 carbon atoms, and Y is a group selected from the group consisting of R 1 , R 4 and an aliphatic unsaturated group.
- d is an integer of 2 to 500) or a monovalent hydrocarbon group having 6 to 18 carbon atoms
- X each independently a divalent hydrocarbon group having 2 to 10 carbon atoms
- a and b each independently an integer of 1 or more
- c an integer greater than or equal to 0,
- a + b + c an integer of 4 or more
- R 3 is each independently a monovalent hydrocarbon group having 1 to 6 carbon atoms or a hydrogen atom
- a cycloalkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted aralkyl group, R 13 is independently an alkyl group having 1 to 6 carbon atoms, e is an integer of 1 to 3, and f Is an integer from 0 to 2, where e + f is an integer from 1 to 3)
- a thermally conductive polysiloxane composition comprising:
- the component (A) is (A-1) 20 to 70% by mass of inorganic particles having an average particle size of 30 ⁇ m to 150 ⁇ m, and (A-2) 1 to 50% by mass of inorganic particles having an average particle size of 1 ⁇ m to less than 30 ⁇ m. And (A-3) the thermally conductive polysiloxane composition according to (1) or (2), comprising 1 to 50% by mass of inorganic particles having an average particle size of 0.1 ⁇ m or more and less than 1 ⁇ m.
- (G) fumed silica chemically treated with a silazane compound is included, and its blending amount is 0.1 to 10 parts by mass with respect to 100 parts by mass of component (D).
- the thermally conductive polysiloxane composition according to any one of to (3).
- thermoly conductive polysiloxane composition that is excellent in coating properties due to low viscosity, does not drop off after coating, and has a small change in hardness over time.
- the present invention provides (A) a thermally conductive filler; (B) The following general formula (1): (Where R 1 : a group having an alkoxysilyl group having 1 to 4 carbon atoms, R 2 : The following general formula (2): Wherein R 4 is each independently a monovalent hydrocarbon group having 1 to 12 carbon atoms, and Y is a group selected from the group consisting of R 1 , R 4 and an aliphatic unsaturated group.
- d is an integer of 2 to 500) or a monovalent hydrocarbon group having 6 to 18 carbon atoms
- X each independently a divalent hydrocarbon group having 2 to 10 carbon atoms
- a and b each independently an integer of 1 or more
- c an integer greater than or equal to 0,
- a + b + c an integer of 4 or more
- R 3 is each independently a monovalent hydrocarbon group having 1 to 6 carbon atoms or a hydrogen atom
- a cycloalkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted aralkyl group, R 13 is independently an alkyl group having 1 to 6 carbon atoms, e is an integer of 1 to 3, and f Is an integer from 0 to 2, where e + f is an integer from 1 to 3)
- thermally conductive filler of component (A) examples include generally known inorganic particles, such as alumina, magnesium oxide, zinc oxide, silica (quartz powder), boron nitride, aluminum nitride, silicon carbide, and metal powder. , Diamond, aluminum hydroxide, and carbon. Particularly preferred are alumina, zinc oxide, aluminum nitride or silicon carbide. These inorganic particles are not particularly limited as long as they are of a grade that can be used as the component (A), and commercially available particles can be used. In addition, as the inorganic particles, a plurality of kinds of different chemical species can be used in combination. In addition, (A) component shall not contain the fumed silica chemically processed with the (G) silazane compound.
- the average particle size of the component (A) is not particularly limited, but from the viewpoint of the filling rate and the viscosity of the thermally conductive polysiloxane composition, it is preferable to use those having an average particle size of 300 ⁇ m or less.
- the component (A) preferably uses a filler having a relatively large particle size and a filler having a relatively small particle size. By using a filler having a plurality of types of particle sizes in combination, a filler having a relatively small particle size enters the gap between the fillers having a relatively large particle size, thereby enabling higher filling.
- the component (A) is (A-1) 20 to 70% by mass of inorganic particles having an average particle size of 30 ⁇ m to 150 ⁇ m, (A-2) 1 to 50% by mass of inorganic particles having an average particle size of 1 ⁇ m to less than 30 ⁇ m, And (A-3) containing 1 to 50% by mass of inorganic particles having an average particle size of 0.1 ⁇ m or more and less than 1 ⁇ m, a heat conductive polysiloxane composition having excellent workability, low viscosity and high heat conductivity can be obtained. ,preferable.
- the present inventors compared with the case where a composition is prepared with a two-component system of the component (A-1) and the component (A-3), When a component is prepared by adding the component (A-2), the difference in particle diameter between the components does not become too large, and the mixing efficiency of the component (A) into the components (B) and (C) is high. It was found that the composition was further improved, a uniform composition was easily obtained, and the viscosity of the composition was likely to be lower.
- the component (A-1) has a particle size distribution peak in the range of 30 ⁇ m to 150 ⁇ m.
- the average particle size of the component (A-1) is 30 ⁇ m or more and 150 ⁇ m or less, even when the component (A) is highly filled in the polysiloxane composition, the viscosity of the thermally conductive polysiloxane composition is low, and It becomes easy to increase thermal conductivity.
- the average particle size of the component (A-1) is more preferably 50 ⁇ m to 120 ⁇ m, particularly preferably 60 ⁇ m to 100 ⁇ m.
- the component (A-2) has a particle size distribution peak in the range of 1 ⁇ m or more and less than 30 ⁇ m.
- the average particle size of the component (A-2) is 1 ⁇ m or more and less than 30 ⁇ m, the mixing efficiency when the components (A-1) to (A-3) are mixed into the components (B) and (C) is further increased. It is easy to obtain a uniform composition, and the viscosity of the composition tends to be lower.
- the average particle size of the component (A-2) is more preferably 1 ⁇ m or more and 20 ⁇ m or less, further preferably 2 ⁇ m or more and 15 ⁇ m or less, and particularly preferably 3 ⁇ m or more and less than 10 ⁇ m.
- the average particle size of the component (A-2) can be 1 ⁇ m or more and 10 ⁇ m or less.
- the component (A-3) has a particle size distribution peak in the range of 0.1 ⁇ m or more and less than 1 ⁇ m.
- the component (A-1) preferably acts to suppress sedimentation or the like.
- the average particle size of the component (A-3) is more preferably 0.15 ⁇ m to 0.9 ⁇ m, and particularly preferably 0.2 ⁇ m to 0.8 ⁇ m.
- the blending ratio of the components (A-1) to (A-3) in the component (A) is determined from the viewpoint of the uniformity, low viscosity, and high heat conductivity of the heat conductive polysiloxane composition.
- Component 20 to 70% by mass, (A-2) component 1 to 50% by mass, and (A-3) 1 to 50% by mass are preferable, and component (A-1) 25 to 65% by mass is more preferable.
- Examples of the components (A-1) to (A-3) include the generally known inorganic particles described above. Of these, alumina is preferable.
- Examples of the shape of the inorganic particles used for the component (A) include, but are not limited to, a spherical shape, a round shape, an indefinite shape, and a polyhedral shape.
- the average particle diameter of the components (A-1) to (A-3) is the median diameter (d50) measured by a laser diffraction / scattering method.
- the components (A-1) to (A-3) may be used alone or in combination of two or more.
- thermally conductive polysiloxane resin composition organic or inorganic particles other than the components (A-1) to (A-3) can be blended within a range not impairing the effects of the present invention.
- the component (B) has the following general formula (1): (Where R 1 : a group having an alkoxysilyl group having 1 to 4 carbon atoms, R 2 : The following general formula (2): Wherein R 4 is each independently a monovalent hydrocarbon group having 1 to 12 carbon atoms, and Y is a group selected from the group consisting of R 1 , R 4 and an aliphatic unsaturated group.
- d is an integer of 2 to 500) or a monovalent hydrocarbon group having 6 to 18 carbon atoms
- X each independently a divalent hydrocarbon group having 2 to 10 carbon atoms
- a and b each independently an integer of 1 or more
- c an integer greater than or equal to 0,
- a + b + c an integer of 4 or more
- R 3 is each independently a monovalent hydrocarbon group having 1 to 6 carbon atoms or a hydrogen atom) It is a siloxane compound shown by.
- the unit containing R 1 , the unit containing R 2, and the unit represented by SiR 3 2 O do not have to be arranged as shown in the general formula (1).
- a unit containing R 1 It is understood that a unit represented by SiR 3 2 O may exist between the unit containing R 2 and R 2 .
- the siloxane compound having a cyclic structure represented by the general formula (1) When the siloxane compound having a cyclic structure represented by the general formula (1) is used, a large number of hydrolyzable groups can be introduced into the cyclic structure, and since it is concentrated in position, the component (A) It is considered that the processing efficiency of the resin becomes higher, and higher filling is possible.
- the siloxane compound itself since the siloxane compound itself has high heat resistance, high heat resistance can be imparted to the thermally conductive polysiloxane composition.
- the cured product of the thermally conductive polysiloxane composition has a small change in hardness when subjected to thermal history over time, and can maintain stable heat dissipation characteristics.
- Such a siloxane compound is easily obtained, for example, by addition reaction of a cyclic siloxane containing a hydrogen group, a siloxane having a vinyl group at one end, and a silane compound containing a vinyl group and a hydrolyzable group. There is an advantage that you can.
- R 1 is a hydrolyzable functional group having an alkoxysilyl group having 1 to 4 carbon atoms.
- R 1 may be directly bonded to X with silicon, but may be bonded to a linking group such as an ester bond.
- examples of R 1 include groups having the following structures.
- R 1 is preferably a group having a structure having two or more, particularly three, alkoxy groups from the viewpoint that the treatment efficiency of the thermally conductive filler tends to be further improved. From the viewpoint it is easy to obtain a raw material, R 1 is preferably contains a methoxy silyl group.
- R 2 is selected from a group having a siloxane unit and a long-chain alkyl group.
- R 2 is a long chain alkyl group
- the carbon number thereof is in the range of 6 to 18, preferably 6 to 14.
- the “long-chain alkyl group” means that the longest carbon chain part in the alkyl group has 6 or more carbon atoms, and if the total carbon number is within the above range, it has a branched structure. May be.
- carbon number into this range the effect with respect to fluidity
- R 2 is a group having a siloxane unit
- R 2 is represented by the general formula (2): (Wherein R 4 , Y and d are as defined above).
- the number of d is in the range of 2 to 500, preferably in the range of 4 to 400, more preferably in the range of 10 to 200, and particularly preferably in the range of 10 to 60.
- R 4 is each independently a monovalent hydrocarbon group having 1 to 12 carbon atoms, and examples thereof include a linear or branched C 1-12 alkyl group and an aryl group such as phenyl or naphthyl.
- R 4 is preferably a methyl group.
- Y is a group selected from the group consisting of R 1 , R 4 and an aliphatic unsaturated group.
- the aliphatic unsaturated group preferably has 2 to 10 carbon atoms, and more preferably 2 to 6 carbon atoms.
- the aliphatic unsaturated group preferably has a double bond at the end because a curing reaction is likely to occur. Since synthesis is easy, Y is preferably a methyl group or a vinyl group.
- R 2 Is preferably a group having the above siloxane unit.
- R 1 and R 2 are bonded to the cyclic siloxane portion of the siloxane compound represented by the general formula (1) through the group X.
- the groups X are each independently a divalent hydrocarbon group having 2 to 10 carbon atoms, and are —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 CH 2 Examples include alkylene groups such as CH 2 —, —CH 2 CH (CH 3 ) —, —CH 2 CH (CH 3 ) CH 2 — and the like. From the viewpoint of easy synthesis, X is preferably —CH 2 CH 2 — or —CH 2 CH (CH 3 ) —.
- R 3 is each independently a monovalent hydrocarbon group having 1 to 6 carbon atoms or a hydrogen atom. Each R 3 may be the same or different. In view of easy synthesis, R 3 is preferably a methyl group or a hydrogen atom.
- a is an integer of 1 or more, preferably 1.
- b is an integer of 1 or more, and preferably 1 or 2.
- c is an integer of 0 or more, preferably 0-2.
- the sum of a + b + c is an integer of 4 or more, but is preferably 4 because synthesis is easy.
- R 2 is selected so that the total of units represented by —SiR 4 2 O— in R 2 is 10 to 60.
- component (B) compounds represented by the following structural formula can be preferably used, but are not limited thereto.
- component (B) includes compounds represented by the following structural formulas.
- M unit the structural unit of the siloxane compound
- D unit the structural unit of the siloxane compound
- M —Si (CH 3 ) 3 O 1/2
- MH -SiH (CH 3 ) 2 O 1/2
- M Vi —Si (CH ⁇ CH 2 ) (CH 3 ) 2 O 1/2
- D Si (CH 3 ) 2 O 2/2
- DH SiH (CH 3 ) O 2/2
- T Si (CH 3 ) O 3/2
- Q SiO 4/2
- a structure in which R 4 is a methyl group and Y is a vinyl group is described as -D j M Vi .
- DH 20 D 20 it is not intended that 20 DH units are followed by 20 D units, and each unit may be arbitrarily arranged. It is understood.
- the amount of component (B) is preferably in the range of 0.01 to 20 parts by mass with respect to 100 parts by mass of component (A). (B) By making the compounding quantity of this range into this range, maintaining the low viscosity of a heat conductive polysiloxane composition, improving the filling property of (A) component, and the change of the hardness over time after hardening. It becomes easy to make small.
- the amount of component (B) is more preferably in the range of 0.1 to 15 parts by mass, particularly preferably 0.2 to 10 parts by mass.
- a component may be individual or may use 2 or more types together.
- the component (C) has the following general formula (3): R 11 e R 12 f Si (OR 13 ) 4- (e + f) (3) Wherein R 11 is independently an alkyl group having 6 to 18 carbon atoms, and R 12 is independently an unsubstituted or substituted acyclic monovalent hydrocarbon group having 1 to 5 carbon atoms, an unsubstituted or substituted group.
- a cycloalkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted aralkyl group, R 13 is independently an alkyl group having 1 to 6 carbon atoms, e is an integer of 1 to 3, and f Is an integer from 0 to 2, where e + f is an integer from 1 to 3) It is the alkoxysilane compound shown by these.
- the component (C) is a low-viscosity component having an alkoxy group, and the compatibility with the component (D) is not reasonably good, so that there is no significant increase in the viscosity of the composition and imparts thixotropic properties. Can be considered.
- examples of R 11 include a linear or branched alkyl group.
- R 11 is a linear alkyl group, and examples thereof include a hexyl group, an octyl group, a nonyl group, a decyl group, a dodecyl group, a tetradecyl group, a hexadecyl group, and an octadecyl group.
- the carbon number of R 11 is 6 to 18, the component (C) becomes liquid at room temperature and is easy to handle, the wettability with the component (A) is good, and the interaction with the component (D) makes the composition Thixotropic properties can be imparted.
- R 11 is more preferably 6 to 14, particularly preferably 6 to 10.
- R 12 includes an alkyl group such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group and a tert-butyl group; an aliphatic unsaturated group such as a vinyl group and an allyl group; a cyclopentyl group and a cyclohexyl group.
- Cycloalkyl groups such as cyclobutyl groups; aryl groups such as phenyl groups, tolyl groups, xylyl groups, and naphthyl groups; aralkyl groups such as benzyl groups, 2-phenylethyl groups, 2-methyl-2-phenylethyl groups, and phenylpropyl groups A group; a group in which some or all of the hydrogen atoms of these hydrocarbon groups are substituted with a halogen atom such as chlorine, fluorine or bromine, a cyano group, such as a chloromethyl group, a trifluoropropyl group, 3, 3, 3- Trifluoropropyl group, 2- (nonafluorobutyl) ethyl group, 2- (heptadecafluorooctyl) ethyl group, chloroform Halogenated hydrocarbon groups such as nyl, bromophenyl, dibromophenyl, tetrachlor
- R 13 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and a methyl group and an ethyl group are preferable.
- e is preferably 1
- f is preferably 0 or 1.
- the amount of component (C) is preferably in the range of 0.01 to 12 parts by mass with respect to 100 parts by mass of component (A). (C) By making the compounding quantity of this range into this range, thixotropic property can be provided, maintaining the low viscosity of a heat conductive polysiloxane composition.
- the amount of component (C) is more preferably 0.05 to 10 parts by mass, particularly preferably 0.1 to 5 parts by mass.
- the blending ratio of the component (B) and the component (C) is preferably in the range of 95: 5 to 55:45 by mass ratio.
- the thixotropic property is imparted while maintaining the low viscosity of the thermally conductive polysiloxane composition, and the change in hardness over time after curing is easily reduced. More preferably, it is 90:10 to 60:40, still more preferably 85:15 to 65:35, and particularly preferably 85:15 to 75:25.
- a component may be individual or may use 2 or more types together.
- [(D) component] As the polyorganosiloxane containing one or more aliphatic unsaturated groups in one molecule of component (D), those represented by the following average composition formula (II) can be used.
- R 21 g R 22 h SiO [4- (g + h)] / 2 (II) (In the formula, R 21 is an aliphatic unsaturated group, and R 22 is a substituted or unsubstituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond.
- G and h are 0 ⁇ g ⁇ (It is a positive number satisfying 3, 0 ⁇ h ⁇ 3, 1 ⁇ g + h ⁇ 3.)
- the aliphatic unsaturated group in R 21 preferably has 2 to 8 carbon atoms, and examples thereof include a vinyl group, an allyl group, a propenyl group, a 1-butenyl group, and a 1-hexenyl group. Preferably, it is a vinyl group.
- One or more, preferably two or more aliphatic unsaturated groups are contained in one molecule.
- the aliphatic unsaturated group may be bonded to the silicon atom at the end of the molecular chain, may be bonded to the silicon atom in the middle of the molecular chain, or may be bonded to both.
- R 22 include the groups exemplified in R 12 of the general formula (3), but do not include aliphatic unsaturated groups such as vinyl groups and allyl groups. Among these, an alkyl group and an aryl group are preferable, and a methyl group and a phenyl group are more preferable.
- g and h are preferably 0.0005 ⁇ g ⁇ 1, 1.5 ⁇ h ⁇ 2.4, 1.5 ⁇ g + h ⁇ 2.5, more preferably 0.001 ⁇ g ⁇ 0.5, It is a number satisfying 1.8 ⁇ h ⁇ 2.1 and 1.8 ⁇ g + h ⁇ 2.2.
- the molecular structure of the component (D) can be linear, branched or cyclic, but is preferably linear or branched.
- the viscosity of component (D) at 23 ° C. is preferably 10 to 10,000 mPa ⁇ s. More preferably, it is 20 to 5,000 mPa ⁇ s.
- the blending amount of the component (D) is preferably 1.5 to 35 parts by mass, more preferably 1.5 to 35 parts by mass of the components (B) to (D) with respect to 100 parts by mass of the component (A). From 30 to 30 parts by mass, particularly preferably from 1.5 to 28 parts by mass.
- the content ratio of the component (D) in the total amount of the components (B) to (D) is preferably 15 to 98% by mass, more preferably 18 to 98% by mass, and particularly preferably 20 to 98% by mass. It mix
- a component may be individual or may use 2 or more types together.
- the component (E) is a polyorganohydrogensiloxane having two or more hydrogen atoms bonded to silicon atoms in one molecule, and the component (D) and the component (B) and / or the component (C) are at least 1 (B) when having an aliphatic unsaturated group (for example, Y in R 2 of the general formula (1) and / or R 12 of the general formula (3) is an aliphatic unsaturated group) It is a component which becomes a crosslinking agent of a component and / or (C) component.
- the component (E) has 2 or more, preferably 3 or more hydrogen atoms bonded to silicon atoms in one molecule.
- This hydrogen atom may be bonded to the silicon atom at the end of the molecular chain, may be bonded to the silicon atom in the middle of the molecular chain, or may be bonded to both. It is also possible to use polyorganohydrogensiloxane having hydrogen atoms bonded only to silicon atoms at both ends.
- the molecular structure of component (E) may be any of linear, branched, cyclic or three-dimensional network, and may be used alone or in combination of two or more.
- compositional formula (III) As a component, what is represented by the following average compositional formula (III) can be used.
- M and n are 0.5 ⁇ m ⁇ 2, 0 ⁇ n ⁇ 2, 0. (5 ⁇ m + n ⁇ 3)
- R 31 include the groups exemplified in R 12 of the general formula (3), but do not include aliphatic unsaturated groups such as vinyl groups and allyl groups. Among these, an alkyl group is preferable and a methyl group is more preferable from the viewpoint of ease of synthesis and cost.
- M and n are preferably numbers satisfying 0.6 ⁇ m ⁇ 1.9, 0.01 ⁇ n ⁇ 1.0, and 0.6 ⁇ m + n ⁇ 2.8.
- the viscosity of component (E) at 23 ° C. is preferably 10 to 500 mPa ⁇ s.
- the blending amount of the component (E) is the component (B) and / or the component (C) when the component (D) and the component (B) and / or the component (C) have at least one aliphatic unsaturated group.
- Component of the aliphatic unsaturated group bonded to the silicon atom of the component (E) 0.1 to 1.5 hydrogen atoms bonded to the silicon atom in the component (E), preferably 0.2 to 1.
- the amount is two.
- the component (F) is a platinum-based catalyst, and when the component (D) and the component (B) and / or the component (C) have at least one aliphatic unsaturated group, the component (B) and / or (C) It is a component which accelerates
- a known catalyst used for hydrosilylation reaction can be used.
- platinum black platinous chloride, chloroplatinic acid, reaction product of chloroplatinic acid and monohydric alcohol, complex of chloroplatinic acid and olefins and vinyl siloxane, platinum-vinyl tetramer complex, platinum bisacetoacetate, etc.
- the blending amount of the component (F) can be appropriately adjusted according to a desired curing rate and the like, and the fat (D), the component (B) and / or the component (C) is at least one fat.
- the total amount of the component (B) and / or the component (C) and the component (E) is in the range of 0.1 to 1,000 ppm in terms of platinum element. It is preferable.
- a component may be individual or may use 2 or more types together.
- reaction inhibitors for platinum group metals include acetylene alcohols such as 2-methyl-3-butyn-2-ol, 1-ethynyl-1-cyclohexanol, and 1-ethynyl-2-cyclohexanol.
- the thermally conductive polysiloxane composition further includes (G) fumed silica chemically treated with a silazane compound, and the blending amount is 0.1 to 10 parts by mass with respect to 100 parts by mass of component (D). When it exists, it is preferable at the point which can provide thixotropy, maintaining the compatibility and low viscosity of a heat conductive polysiloxane composition.
- the fumed silica is also called a dry method as opposed to a wet method, and is generally made by a flame hydrolysis method. Specifically, a method of making silicon tetrachloride by burning with hydrogen and oxygen is generally known, but silanes such as methyltrichlorosilane and trichlorosilane can be used alone or silicon tetrachloride instead of silicon tetrachloride. Can be used in a mixed state.
- the fumed silica is commercially available from Nippon Aerosil Co., Ltd. as Aerosil and Tokuyama Co., Ltd. as QS type.
- the component (G) is preferably fumed silica having a BET specific surface area of 50 to 300 m 2 / g because it easily imparts thixotropy without greatly increasing the viscosity of the thermally conductive polysiloxane composition.
- BET specific surface area is more preferable to be 100 ⁇ 270m 2 / g, and particularly preferably 150 ⁇ 250m 2 / g.
- silazane compounds include hexamethyldisilazane, 1,3-divinyl-1,1,3,3-tetramethyldisilazane, 1,3-bis (chloromethyl) tetramethyldisilazane, 1,3-bis (3 , 3,3-trifluoropropyl) -1,1,3,3-tetramethyldisilazane, 1,3-diphenyltetramethyldisilazane, heptamethyldisilazane, 2,2,4,4,6,6- Examples include hexamethylcyclotrisilazane, octamethylcyclotetrasilazane, 1,1,3,3-tetramethyldisilazane, 2,4,6-trimethyl-2,4,6-trivinylcyclotrisilazane and the like. it can.
- hexamethyldisilazane is preferable from the viewpoint of the treatment degree of fumed silica and the stability (inactivation
- the amount of component (G) is preferably 0.1 to 10 parts by weight, more preferably 0.3 to 5 parts by weight, and particularly preferably 0.5 to 100 parts by weight of component (D). ⁇ 3 parts by mass.
- the thermally conductive polysiloxane composition further includes a flame retardant imparting agent, a heat resistance improver, a plasticizer, a colorant, an adhesiveness imparting material, a diluent and the like within a range not impairing the object of the present invention. Can be contained.
- the thermally conductive polysiloxane composition can be obtained by mixing the components (A) to (F) and the optional (G) component sequentially or at once with a mixer such as a planetary mixer.
- a mixer such as a planetary mixer.
- the order of addition and mixing of the components (A) to (F) and the optional (G) component is not particularly limited, but after the (A) component is premixed with the (B) to (D) components, the remaining components are mixed. It is preferable to add and mix. In this case, any or all of the remaining components can be simultaneously added to and mixed with the mixture of the components (A) to (D).
- mixing may be performed while heating in the range of 50 to 180 ° C. as necessary.
- a kneading apparatus there are a three roll, a colloid mill, a sand grinder, etc. Among them, a method using a three roll is preferable.
- the heat conductive polysiloxane composition preferably has a viscosity at 23 ° C. of 50 to 1,000 Pa ⁇ s from the viewpoint of coating properties and prevention of sagging.
- the viscosity is in accordance with JIS K6249, and the rotational viscometer rotor No. 7. A value measured as a rotation speed of 20 rpm and a value of 1 minute.
- the viscosity of the heat conductive polysiloxane composition is more preferably 100 to 750 Pa ⁇ s, and particularly preferably 150 to 500 Pa ⁇ s.
- Thermally conductive polysiloxane composition from the viewpoint of dripping prevention, at 23 ° C., the viscosity at rpm 20 rpm: V 20 rpm, and, using the same rotor and the measurement of the rotation speed 20 rpm, at a rotation speed of 10rpm
- the thixotropy ratio which is a value of the formula: V 10 rpm / V 20 rpm , determined from the measured viscosity: V 10 rpm , is preferably 1.40 to 2.00.
- the thixotropy ratio is more preferably 1.45 to 1.80, and still more preferably 1.47 to 1.60.
- the thermally conductive polysiloxane composition has the component (D) and the component (B) and / or (C) when the component (B) and / or the component (C) has at least one aliphatic unsaturated group.
- Component and (E) component can be cured by addition reaction to form silicone rubber. Silicone rubber obtained by curing a thermally conductive polysiloxane composition can be used as a heat radiating member for electronic parts such as electronic devices and integrated circuit elements.
- the thermally conductive polysiloxane composition for example, after applying the composition to an adherend that requires heat dissipation, the composition is allowed to stand at room temperature, or heated at a temperature of 50 to 200 ° C. A method is mentioned. From the viewpoint of rapid curing, it is preferable to employ a heating method.
- the E hardness after curing of the thermally conductive polysiloxane composition is not particularly limited, but is preferably 20 to 80. When the E hardness is in this range, the cured product has flexibility, increases adhesion to electronic components, can moderately reduce external stress, and increase heat conduction efficiency.
- the E hardness is preferably 30 to 70, more preferably 35 to 65.
- the change in E hardness after a heat resistance test at 150 ° C. and 1000 hours for the cured product of the thermally conductive polysiloxane composition is an index indicating the temporal stability of the cured product. If the change in E hardness is too large, the flexibility of the cured product and the adhesion to the electronic component change over time, and the thermal conductivity of the cured product may change.
- the change in E hardness is preferably 20 or less, more preferably 16 or less, and particularly preferably 12 or less.
- the cured product of the thermally conductive polysiloxane composition has a thermal conductivity at 23 ° C. of 2.0 W / (m ⁇ K) or more, preferably 2.5 W / (m ⁇ K) or more, more preferably measured by a hot wire method. Is 3.0 W / (m ⁇ K) or more.
- the content ratio of the component (A) in the composition is preferably 80% by mass or more, depending on the required thermal conductivity (A). The content ratio of the components can be increased.
- Silicone rubber obtained by curing a thermally conductive polysiloxane composition is equipped with a PC / server, power module, VLSI, and optical components (optical pickup, LED, etc.) equipped with a CPU that generates a large amount of heat.
- a heat dissipation member for various electronic devices, home appliances (DVD / HDD recorders and players, AV devices such as FPD), PC peripheral devices, home game machines, automobiles, and other industrial devices such as inverters and switching power supplies can do.
- Component (A-1) Component: Alumina particles, average particle size 35 ⁇ m
- Component (A-2) Alumina particles, average particle size 3 ⁇ m
- Component (A-3) Alumina particles, average particle size 0.4 ⁇ m
- Component (C) Component (C-1): n-hexyltrimethoxysilane (C-2) Component: n-decyltriethoxysilane
- E Component (E-1) Component: Polyorganohydrogensiloxane MH D 20 MH (E-2) Component: Polyorganohydrogensiloxane MH k Q (Consisting of MH units and Q units, containing hydrogen atoms bonded to at least 3 silicon atoms in one molecule. Content of hydrogen atoms bonded to silicon atoms is 1.0% by mass, average number in terms of polystyrene Molecular weight 800.)
- Platinum-based catalyst platinum amount 1.8% by mass vinyl tetramer complex
- ⁇ Measurement method> [Average particle size] The average particle diameter (median diameter d50) was measured by a laser diffraction / scattering method.
- Examples 1 to 4 and Comparative Examples 1 to 4 The components (A) to (D) and the optional component (G) shown in Table 1 were charged into a planetary mixer (Dalton), stirred and mixed at room temperature for 1 hour, and further stirred and mixed at 150 ° C for 2 hours. After obtaining a mixture, it was cooled to 25 ° C. Thereafter, components (E), (F) and (F-2) were added to and mixed with the mixture to obtain a heat conductive polysiloxane composition. The composition thus obtained was measured for viscosity and thixotropy and subjected to a slump test. The results are shown in Table 1.
- thermally conductive polysiloxane compositions of Examples 1 to 4 and Comparative Examples 1 to 4 were cured by heating in a mold at 150 ° C. for 1 hour to obtain a cured product of the thermally conductive polysiloxane composition having a thickness of 6 mm. Obtained.
- the thermal conductivity and E hardness of the cured product thus obtained were measured. The results are shown in Table 1.
- Examples 1 to 4 and Comparative Examples 1 to 4 By comparing Examples 1 to 4 and Comparative Examples 1 to 4, (A) a thermally conductive filler, (B) a siloxane compound represented by general formula (1), and (C) represented by general formula (3) (D) a polyorganosiloxane containing one or more aliphatic unsaturated groups in one molecule, (E) a polyorganohydro having two or more hydrogen atoms bonded to silicon atoms in one molecule
- Gensiloxane and (F) a platinum-based catalyst are excellent in coating properties because of low viscosity, have no sagging drop after coating, and have little change in hardness over time. Recognize. In the compositions of Comparative Examples 1 to 3 that do not contain the component (C), sagging occurs after coating.
- the composition of Comparative Example 4 containing no component (B) has a large change in hardness over time.
- Example 1 in which an alkoxysilane compound having a linear alkyl group having 6 to 10 carbon atoms was used as the component (C), the viscosity was low, there was no sagging drop after coating, and the hardness over time The change in height is small. According to a comparison of Examples 1 to 3, Example 2 in which the blending ratio of the component (B) and the component (C) is 80:20 by mass is preferable because the change in hardness with time is smaller. In addition to the components (A) to (F), Example 4 containing fumed silica chemically treated with a (G) silazane compound has a higher thixotropic ratio than Example 3 not containing the component (G). It has become.
- the heat conductive polysiloxane composition of the present invention can be used as a heat dissipation material for various devices having a heat generating portion such as an electronic device such as a personal computer.
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Abstract
Description
本発明の要旨は以下の通りである。
(B)下記一般式(1):
(式中、
R1:炭素数1~4のアルコキシシリル基を有する基、
R2:下記一般式(2):
(式中、R4は、それぞれ独立して炭素数1~12の1価の炭化水素基であり、Yは、R1、R4及び脂肪族不飽和基からなる群より選択される基であり、dは2~500の整数である)で示されるシロキサン単位を有する基又は炭素数6~18の1価の炭化水素基、
X:それぞれ独立して炭素数2~10の2価の炭化水素基、
a及びb:それぞれ独立して1以上の整数、
c:0以上の整数、
a+b+c:4以上の整数、
R3:それぞれ独立して、炭素数1~6の1価の炭化水素基又は水素原子である)
で示されるシロキサン化合物;
(C)下記一般式(3):
R11 eR12 fSi(OR13)4-(e+f) (3)
(式中、R11は独立に炭素数6~18のアルキル基であり、R12は独立に非置換若しくは置換の炭素数1~5の非環状の1価炭化水素基、非置換若しくは置換のシクロアルキル基、非置換若しくは置換のアリール基、又は非置換若しくは置換のアラルキル基であり、R13は独立に炭素数1~6のアルキル基であり、eは1~3の整数であり、fは0~2の整数であり、但しe+fは1~3の整数である)
で示されるアルコキシシラン化合物;
(D)1分子中に1個以上の脂肪族不飽和基を含有するポリオルガノシロキサン;
(E)1分子中にケイ素原子に結合した水素原子を2個以上有するポリオルガノハイドロジェンシロキサン;及び
(F)白金系触媒;
を含む、熱伝導性ポリシロキサン組成物。
(B)下記一般式(1):
(式中、
R1:炭素数1~4のアルコキシシリル基を有する基、
R2:下記一般式(2):
(式中、R4は、それぞれ独立して炭素数1~12の1価の炭化水素基であり、Yは、R1、R4及び脂肪族不飽和基からなる群より選択される基であり、dは2~500の整数である)で示されるシロキサン単位を有する基又は炭素数6~18の1価の炭化水素基、
X:それぞれ独立して炭素数2~10の2価の炭化水素基、
a及びb:それぞれ独立して1以上の整数、
c:0以上の整数、
a+b+c:4以上の整数、
R3:それぞれ独立して、炭素数1~6の1価の炭化水素基又は水素原子である)
で示されるシロキサン化合物;
(C)下記一般式(3):
R11 eR12 fSi(OR13)4-(e+f) (3)
(式中、R11は独立に炭素数6~18のアルキル基であり、R12は独立に非置換若しくは置換の炭素数1~5の非環状の1価炭化水素基、非置換若しくは置換のシクロアルキル基、非置換若しくは置換のアリール基、又は非置換若しくは置換のアラルキル基であり、R13は独立に炭素数1~6のアルキル基であり、eは1~3の整数であり、fは0~2の整数であり、但しe+fは1~3の整数である)
で示されるアルコキシシラン化合物;
(D)1分子中に1個以上の脂肪族不飽和基を含有するポリオルガノシロキサン;
(E)1分子中にケイ素原子に結合した水素原子を2個以上有するポリオルガノハイドロジェンシロキサン;及び
(F)白金系触媒;
を含む、熱伝導性ポリシロキサン組成物である。
(A)成分の熱伝導性充填剤としては、一般的に公知の無機粒子が例示され、アルミナ、酸化マグネシウム、酸化亜鉛、シリカ(石英粉)、窒化ホウ素、窒化アルミニウム、炭化ケイ素、金属粉体、ダイヤモンド、水酸化アルミニウム、カーボンが挙げられる。特に好ましいものはアルミナ、酸化亜鉛、窒化アルミニウム又は炭化ケイ素である。これらの無機粒子としては、(A)成分として利用可能なグレードのものであれば特に制限されず、市販のものを利用することができる。また、無機粒子としては、異なる化学種である複数種類のものを組み合わせて用いることもできる。なお、(A)成分には、(G)シラザン化合物で化学処理されている煙霧質シリカを含まないものとする。
(B)成分は、下記一般式(1):
(式中、
R1:炭素数1~4のアルコキシシリル基を有する基、
R2:下記一般式(2):
(式中、R4は、それぞれ独立して炭素数1~12の1価の炭化水素基であり、Yは、R1、R4及び脂肪族不飽和基からなる群より選択される基であり、dは2~500の整数である)で示されるシロキサン単位を有する基又は炭素数6~18の1価の炭化水素基、
X:それぞれ独立して炭素数2~10の2価の炭化水素基、
a及びb:それぞれ独立して1以上の整数、
c:0以上の整数、
a+b+c:4以上の整数、
R3:それぞれ独立して、炭素数1~6の1価の炭化水素基又は水素原子である)
で示されるシロキサン化合物である。
このようなシロキサン化合物は、例えば、水素基が含有された環状シロキサンと、片末端にビニル基を有するシロキサン、ビニル基と加水分解性基を含有したシラン化合物とを付加反応させることで容易に得ることができるという利点がある。
中でも、R1は、熱伝導性充填剤の処理効率がより向上する傾向にある点から、アルコキシ基を2つ以上、特に3つ有する構造の基であることが好ましい。また、原料を得ることが容易である点から、R1は、メトキシシリル基を含有することが好ましい。
M:-Si(CH3)3O1/2
MH:-SiH(CH3)2O1/2
MVi:-Si(CH=CH2)(CH3)2O1/2
D:Si(CH3)2O2/2
DH:SiH(CH3)O2/2
T:Si(CH3)O3/2
Q:SiO4/2
例えば、前記一般式(2)においてR4がメチル基であり、Yがビニル基であるような構造は、-DjMViと記述される。ただし、例えばDH 20D20と記した場合には、DH単位が20個続いた後D単位が20個続くことを意図するものではなく、各々の単位は任意に配列していてもよいことが理解される。
(C)成分は、下記一般式(3):
R11 eR12 fSi(OR13)4-(e+f) (3)
(式中、R11は独立に炭素数6~18のアルキル基であり、R12は独立に非置換若しくは置換の炭素数1~5の非環状の1価炭化水素基、非置換若しくは置換のシクロアルキル基、非置換若しくは置換のアリール基、又は非置換若しくは置換のアラルキル基であり、R13は独立に炭素数1~6のアルキル基であり、eは1~3の整数であり、fは0~2の整数であり、但しe+fは1~3の整数である)
で示されるアルコキシシラン化合物である。
R12としては、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、tert-ブチル基等のアルキル基;ビニル基、アリル基等の脂肪族不飽和基;シクロペンチル基、シクロヘキシル基、シクロブチル基等のシクロアルキル基;フェニル基、トリル基、キシリル基、ナフチル基等のアリール基;ベンジル基、2-フェニルエチル基、2-メチル-2-フェニルエチル基、フェニルプロピル基等のアラルキル基;これらの炭化水素基の水素原子の一部又は全部を塩素、フッ素、臭素等のハロゲン原子、シアノ基等で置換した基、例えばクロロメチル基、トリフルオロプロピル基、3,3,3-トリフルオロプロピル基、2-(ノナフルオロブチル)エチル基、2-(ヘプタデカフルオロオクチル)エチル基、クロロフェニル基、ブロモフェニル基、ジブロモフェニル基、テトラクロロフェニル基、フルオロフェニル基、ジフルオロフェニル基等のハロゲン化炭化水素基やα-シアノエチル基、β-シアノプロピル基、γ-シアノプロピル基等のシアノアルキル基等が挙げられ、好ましくはメチル基、エチル基である。
R13としては、メチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基等が挙げられ、好ましくはメチル基、エチル基である。
eは、1であることが好ましく、fは、0又は1であることが好ましい。
C6H13Si(OCH3)3
C10H21Si(OCH3)3
C10H21Si(OC2H5)3
C12H25Si(OCH3)3
C12H25Si(OC2H5)3
C10H21Si(CH3)(OCH3)2
C10H21Si(C6H5)(OCH3)2
C10H21Si(CH3)(OC2H5)2
C10H21Si(CH=CH2)(OCH3)2
C10H21Si(CH2CH2CF3)(OCH3)2
(D)成分の1分子中に1個以上の脂肪族不飽和基を含有するポリオルガノシロキサンとしては、下記平均組成式(II)で表されるものを使用することができる。
R21 gR22 hSiO[4-(g+h)]/2 (II)
(式中、R21は、脂肪族不飽和基であり、R22は、脂肪族不飽和結合を含まない置換又は非置換の1価炭化水素基である。g,hは、0<g<3、0<h<3、1<g+h<3を満足する正数である。)
(D)成分の23℃における粘度は、10~10,000mPa・sであることが好ましい。より好ましくは20~5,000mPa・sである。
(E)成分は、1分子中にケイ素原子に結合した水素原子を2個以上有するポリオルガノハイドロジェンシロキサンであり、(D)成分、並びに(B)成分及び/又は(C)成分が少なくとも1個の脂肪族不飽和基を有する(例えば、一般式(1)のR2中のY、及び/又は一般式(3)のR12が脂肪族不飽和基である)場合には(B)成分及び/又は(C)成分の架橋剤となる成分である。(E)成分は、1分子中にケイ素原子に結合した水素原子を2個以上、好ましくは3個以上有するものである。この水素原子は、分子鎖末端のケイ素原子に結合していても、分子鎖途中のケイ素原子に結合していても、両方に結合していてもよい。また、両末端のケイ素原子にのみ結合した水素原子を有するポリオルガノハイドロジェンシロキサンを使用することもできる。(E)成分の分子構造は、直鎖状、分岐鎖状、環状あるいは三次元網目状のいずれでもよく、単独でも、二種以上を併用してもよい。
R31 mHnSiO[4-(m+n)]/2 (III)
(式中、R31は、脂肪族不飽和結合を含まない置換又は非置換の1価炭化水素基である。m、nは、0.5≦m≦2、0<n≦2、0.5<m+n≦3を満足する数である。)
(F)成分は白金系触媒であり、(D)成分、並びに(B)成分及び/又は(C)成分が少なくとも1個の脂肪族不飽和基を有する場合には(B)成分及び/又は(C)成分と、(E)成分との混合後、硬化を促進させる成分である。(F)成分としては、ヒドロシリル化反応に用いられる周知の触媒を用いることができる。例えば、白金黒、塩化第二白金、塩化白金酸、塩化白金酸と一価アルコールとの反応物、塩化白金酸とオレフィン類やビニルシロキサンとの錯体、白金-ビニルテトラマー錯体、白金ビスアセトアセテート等を挙げることができる。(F)成分の配合量は、所望の硬化速度等に応じて適宜調整することができるものであり、(D)成分、並びに(B)成分及び/又は(C)成分が少なくとも1個の脂肪族不飽和基を有する場合には(B)成分及び/又は(C)成分と、(E)成分との合計量に対し、白金元素に換算して0.1~1,000ppmの範囲とすることが好ましい。(F)成分は、単独でも、二種以上を併用してもよい。
熱伝導性ポリシロキサン組成物は、更に、(G)シラザン化合物で化学処理されている煙霧質シリカを含み、その配合量が(D)成分100質量部に対して0.1~10質量部であると、熱伝導性ポリシロキサン組成物の相溶性及び低粘度を維持しつつ、チキソトロピー性を付与できる点で、好ましい。
熱伝導性ポリシロキサン組成物は、更に必要に応じて、難燃性付与剤、耐熱性向上剤、可塑剤、着色剤、接着性付与材、希釈剤等を本発明の目的を損なわない範囲で含有することができる。
熱伝導性ポリシロキサン組成物は、(A)~(F)成分及び任意の(G)成分等を順次又は一度にプラネタリー型ミキサー等の混合機で混合することにより得ることができる。(A)~(F)成分及び任意の(G)成分等の添加・混合順は特に限定されないが、(A)成分を(B)~(D)成分にあらかじめ混合した後、残りの成分を添加・混合することが好ましい。この場合、残りの成分のいずれか又は全部を(A)~(D)成分の混合物へ同時に添加・混合することもできる。混合時には、必要に応じて50~180℃の範囲で加熱しながら混合してもよい。更に均一仕上げのためには、高剪断力下で混練操作を行うことが好ましい。混練装置としては、3本ロール、コロイドミル、サンドグラインダー等があるが、中でも3本ロールによる方法が好ましい。
熱伝導性ポリシロキサン組成物は、(D)成分、並びに(B)成分及び/又は(C)成分が少なくとも1個の脂肪族不飽和基を有する場合には(B)成分及び/又は(C)成分と、(E)成分とを付加反応により硬化させて、シリコーンゴムとすることができる。熱伝導性ポリシロキサン組成物を硬化させることによって得られるシリコーンゴムは、電子機器、集積回路素子等の電子部品の放熱部材として使用することができる。
(A)成分
(A-1)成分:アルミナ粒子、平均粒子径35μm
(A-2)成分:アルミナ粒子、平均粒子径3μm
(A-3)成分:アルミナ粒子、平均粒子径0.4μm
(C-1)成分:n-ヘキシルトリメトキシシラン
(C-2)成分:n-デシルトリエトキシシラン
両末端ビニル基ポリジメチルシロキサン(粘度:100mPa・s)
(E-1)成分:ポリオルガノハイドロジェンシロキサン MHD20MH
(E-2)成分:ポリオルガノハイドロジェンシロキサン MH kQ
(MH単位及びQ単位からなり、一分子中に少なくとも3個以上のケイ素原子に結合した水素原子を含有する。ケイ素原子に結合した水素原子の含有量1.0質量%、ポリスチレン換算数平均分子量800。)
白金系触媒:白金量1.8質量%ビニルテトラマー錯体
反応抑制剤:1-エチニル-1-シクロヘキサノール
シラザン処理煙霧質シリカ:ヘキサメチルジシラザン処理煙霧質シリカ:BET比表面積200m2/g
[平均粒子径]
平均粒子径(メジアン径d50)は、レーザー回折・散乱法により測定した。
JIS K6249に準拠。23℃における熱伝導性ポリシロキサン組成物の粘度を、回転粘度計ローターNo.7、回転数20rpm、1分値として測定した。
23℃における熱伝導性ポリシロキサン組成物の回転数20rpmにおける粘度:V20rpm、及び、回転数20rpmの測定時と同一のローターを使用し、回転数10rpmにて測定した粘度:V10rpmから、式:V10rpm/V20rpmの値であるチキソトロピー比を求めた。
JIS A 1439に準拠したスランプ縦試験にてタレ落ちを評価した。試験は23℃の環境で実施した。JIS A 1439における溝型容器の幅を5mm、深さを5mmに変更した溝型容器に、熱伝導性ポリシロキサン組成物を充填した。試験体を鉛直に懸垂し、30分後に、溝型容器の溝部分の最下端から組成物が垂れ下がった先端までの距離を0.5mm単位で測定した。なお、組成物が溝型容器から計測可能範囲外に流出した場合は、タレ落ちとした。
熱伝導性ポリシロキサン組成物の硬化物について、23℃において、Hot disk法に従い、ホットディスク法 熱物性測定装置(京都電子工業社製、TPS 1500)を用いて測定した。
熱伝導性ポリシロキサン組成物の硬化物について、JIS K 6253-3に準拠し、23℃におけるE硬度を測定した。
熱伝導性ポリシロキサン組成物の硬化物について、150℃、1000時間の耐熱試験を行った。こうして得た試験片について、JIS K 6253-3に準拠し、23℃におけるE硬度を測定した。
表1に示す(A)~(D)成分及び任意の(G)成分をプラネタリー型ミキサー(ダルトン社製)に仕込み、室温にて1時間撹拌混合し、更に150℃にて2時間撹拌混合して混合物を得た後、25℃まで冷却した。その後、前記混合物に(E)、(F)及び(F-2)成分を添加・混合して、熱伝導性ポリシロキサン組成物を得た。こうして得た組成物について、粘度及びチキソトロピー比を測定し、かつ、スランプ試験を実施した。結果を表1に示す。
Claims (6)
- (A)熱伝導性充填剤;
(B)下記一般式(1):
(式中、
R1:炭素数1~4のアルコキシシリル基を有する基、
R2:下記一般式(2):
(式中、R4は、それぞれ独立して炭素数1~12の1価の炭化水素基であり、Yは、R1、R4及び脂肪族不飽和基からなる群より選択される基であり、dは2~500の整数である)で示されるシロキサン単位を有する基又は炭素数6~18の1価の炭化水素基、
X:それぞれ独立して炭素数2~10の2価の炭化水素基、
a及びb:それぞれ独立して1以上の整数、
c:0以上の整数、
a+b+c:4以上の整数、
R3:それぞれ独立して、炭素数1~6の1価の炭化水素基又は水素原子である)
で示されるシロキサン化合物;
(C)下記一般式(3):
R11 eR12 fSi(OR13)4-(e+f) (3)
(式中、R11は独立に炭素数6~18のアルキル基であり、R12は独立に非置換若しくは置換の炭素数1~5の非環状の1価炭化水素基、非置換若しくは置換のシクロアルキル基、非置換若しくは置換のアリール基、又は非置換若しくは置換のアラルキル基であり、R13は独立に炭素数1~6のアルキル基であり、eは1~3の整数であり、fは0~2の整数であり、但しe+fは1~3の整数である)
で示されるアルコキシシラン化合物;
(D)1分子中に1個以上の脂肪族不飽和基を含有するポリオルガノシロキサン;
(E)1分子中にケイ素原子に結合した水素原子を2個以上有するポリオルガノハイドロジェンシロキサン;及び
(F)白金系触媒;
を含む、熱伝導性ポリシロキサン組成物。 - (B)成分と(C)成分との配合比率が、質量比で95:5~55:45の範囲である、請求項1記載の熱伝導性ポリシロキサン組成物。
- (A)成分が、(A-1)平均粒子径30μm以上150μm以下の無機粒子20~70質量%、(A-2)平均粒子径1μm以上30μm未満の無機粒子1~50質量%、及び(A-3)平均粒子径0.1μm以上1μm未満の無機粒子1~50質量%を含む、請求項1又は2記載の熱伝導性ポリシロキサン組成物。
- 更に、(G)シラザン化合物で化学処理されている煙霧質シリカを含み、その配合量が(D)成分100質量部に対して0.1~10質量部である、請求項1~3のいずれか一項記載の熱伝導性ポリシロキサン組成物。
- 請求項1~4のいずれか一項記載の熱伝導性ポリシロキサン組成物を硬化した、シリコーンゴム。
- 請求項5記載のシリコーンゴムを含む、電子部品。
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- 2018-05-31 KR KR1020197036940A patent/KR102494258B1/ko active Active
- 2018-05-31 WO PCT/JP2018/020905 patent/WO2018221637A1/ja active Application Filing
- 2018-05-31 CN CN201880036368.XA patent/CN110719939B/zh active Active
- 2018-05-31 TW TW107118709A patent/TWI746856B/zh active
- 2018-05-31 EP EP18808875.1A patent/EP3632987B1/en active Active
- 2018-05-31 US US16/618,083 patent/US11359124B2/en active Active
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KR20210110631A (ko) * | 2018-12-29 | 2021-09-08 | 다우 글로벌 테크놀로지스 엘엘씨 | Mgo 충전제를 함유하는 열전도성 조성물 및 상기 조성물이 사용되는 방법 및 장치 |
JP2022521123A (ja) * | 2018-12-29 | 2022-04-06 | ダウ グローバル テクノロジーズ エルエルシー | Mgoフィラーを含有する熱伝導性組成物および当該組成物が使用される方法およびデバイス |
EP3902873A4 (en) * | 2018-12-29 | 2022-11-09 | Dow Global Technologies LLC | THERMALLY CONDUCTIVE COMPOSITION WITH MGO FILLER AND METHODS AND DEVICES USING SUCH COMPOSITION |
JP7311609B2 (ja) | 2018-12-29 | 2023-07-19 | ダウ グローバル テクノロジーズ エルエルシー | Mgoフィラーを含有する熱伝導性組成物および当該組成物が使用される方法およびデバイス |
KR102693604B1 (ko) * | 2018-12-29 | 2024-08-12 | 다우 글로벌 테크놀로지스 엘엘씨 | MgO 충전제를 함유하는 열전도성 조성물 및 상기 조성물이 사용되는 방법 및 장치 |
US20210189188A1 (en) * | 2019-12-18 | 2021-06-24 | Fuji Polymer Industries Co., Ltd. | Thermally conductive composition, thermally conductive sheet and method for producing the same |
WO2022049816A1 (ja) * | 2020-09-03 | 2022-03-10 | 富士高分子工業株式会社 | 熱伝導性シリコーン組成物及びその製造方法 |
JP7055254B1 (ja) * | 2020-09-03 | 2022-04-15 | 富士高分子工業株式会社 | 熱伝導性シリコーン組成物の製造方法 |
CN114466904A (zh) * | 2020-09-03 | 2022-05-10 | 富士高分子工业株式会社 | 导热性有机硅组合物及其制造方法 |
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CN110719939B (zh) | 2022-02-18 |
EP3632987A1 (en) | 2020-04-08 |
US20200140736A1 (en) | 2020-05-07 |
US11359124B2 (en) | 2022-06-14 |
JPWO2018221637A1 (ja) | 2019-06-27 |
TWI746856B (zh) | 2021-11-21 |
EP3632987B1 (en) | 2021-12-22 |
JP6431248B1 (ja) | 2018-11-28 |
TW201905093A (zh) | 2019-02-01 |
EP3632987A4 (en) | 2021-03-10 |
KR102494258B1 (ko) | 2023-01-31 |
CN110719939A (zh) | 2020-01-21 |
KR20200016262A (ko) | 2020-02-14 |
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