	US 12,221,543 B2
	Thermally conductive silicone composition and production method therefor
Kunihiro Yamada, Annaka (JP); Kenichi Tsuji, Annaka (JP); and Keita Kitazawa, Annaka (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Appl. No. 17/771,086
Filed by SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
PCT Filed Oct. 1, 2020, PCT No. PCT/JP2020/037438 § 371(c)(1), (2) Date Apr. 22, 2022, PCT Pub. No. WO2021/079714, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-193234 (JP), filed on Oct. 24, 2019.
Prior Publication US 2022/0380548 A1, Dec. 1, 2022
Int. Cl. C08L 83/04 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01); C08K 3/08 (2006.01); C08K 3/22 (2006.01); C08K 5/01 (2006.01)

CPC C08L 83/04 (2013.01) [C08G 77/12 (2013.01); C08G 77/20 (2013.01); C08K 3/08 (2013.01); C08K 3/22 (2013.01); C08K 5/01 (2013.01); C08K 2003/0812 (2013.01); C08K 2003/2296 (2013.01); C08K 2201/001 (2013.01); C08K 2201/003 (2013.01); C08K 2201/005 (2013.01); C08K 2201/014 (2013.01)]

6 Claims

1. A heat conductive silicone composition comprising

(A) a crosslinked silicone gel,

(B) a silicone oil containing neither aliphatic unsaturated bonds nor SiH groups and serving as a surface treatment agent for components (C) and (D),

(C) an aluminum powder in an amount of 800 to 2,000 parts by weight per 100 parts by weight of components (A) and (B) combined, the aluminum powder including

(C-1) an aluminum powder having an average particle size of from 40 μm to 100 μm in an amount of 30 to 70% by weight of component (C),

(C-2) an aluminum powder having an average particle size of from 6 μm to less than 40 μm in an amount of 10 to 60% by weight of component (C), and (C-3) an aluminum powder having an average particle size of from 0.4 um to less than 6 um in an amount of 10 to 60% by weight of component (C),

(D) a zinc oxide powder having an average particle size of 0.1 to 10 μm in an amount of 50 to 500 parts by weight per 100 parts by weight of components (A) and (B) combined, and

(E) a volatile solvent in an amount of 10 to 300 parts by weight per 100 parts by weight of components (A) and (B) combined.