US 12,441,924 B2
Thermally-conductive silicone gel composition, thermally-conductive silicone gel sheet, and method for producing same
Takumi Kataishi, Aichi (JP); Mai Sugie, Aichi (JP); and Yuko Kimura, Aichi (JP)
Assigned to Fuji Polymer Industries Co., Ltd., Aichi (JP)
Appl. No. 17/772,073
Filed by Fuji Polymer Industries Co., Ltd., Nagoya (JP)
PCT Filed Mar. 26, 2021, PCT No. PCT/JP2021/012921
§ 371(c)(1), (2) Date Apr. 26, 2022,
PCT Pub. No. WO2022/009486, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 2020-117285 (JP), filed on Jul. 7, 2020.
Prior Publication US 2022/0380653 A1, Dec. 1, 2022
Int. Cl. C09K 5/14 (2006.01); C08G 77/08 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01); C08J 5/18 (2006.01); C08K 3/22 (2006.01); C08K 7/18 (2006.01)
CPC C09K 5/14 (2013.01) [C08G 77/08 (2013.01); C08G 77/12 (2013.01); C08G 77/20 (2013.01); C08J 5/18 (2013.01); C08K 7/18 (2013.01); C08J 2383/05 (2013.01); C08J 2383/07 (2013.01); C08K 2201/001 (2013.01); C08K 2201/005 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A thermally-conductive silicone gel composition comprising:
A a linear organopolysiloxane having one vinyl group at each terminal end of a molecular chain and a kinematic viscosity of 1 to 600 mm2/s;
B a linear organopolysiloxane having three or more Si—H groups in one molecule and an Si—H group content of 0.05 to 2 mol/kg, in an amount such that a ratio of the number of Si—H groups in B component to the number of vinyl groups in A component is 0.3 to 0.4;
C a platinum group metal-based catalyst in a catalytic amount; and
D a thermally-conductive filler in an amount of 300 to 1000 parts by mass when a total amount of A and B is taken as 100 parts by mass, including
D1 50 to 400 parts by mass of at least one type of spherical alumina with an average particle size of 1 to 5 μm, a part or a whole of the alumina being surface-treated with RaSi(OR′)4-a, where R represents an unsubstituted or substituted organic group having 8 to 12 carbon atoms, R′ represents an alkyl group having 1 to 4 carbon atoms, and a is 1, and
D2 100 to 950 parts by mass of at least one type of spherical alumina with an average particle size of 10 to 100 μm.