	US 12,384,902 B2
	Insulating paste
Akihiro Horimoto, Tokyo (JP); and Mayo Miyachi, Tokyo (JP)
Assigned to SUMITOMO BAKELITE CO., LTD., Tokyo (JP)
Appl. No. 17/276,161
Filed by SUMITOMO BAKELITE CO., LTD., Tokyo (JP)
PCT Filed Sep. 26, 2018, PCT No. PCT/JP2018/035773 § 371(c)(1), (2) Date Mar. 15, 2021, PCT Pub. No. WO2020/065785, PCT Pub. Date Apr. 2, 2020.
Prior Publication US 2021/0269618 A1, Sep. 2, 2021
Int. Cl. C08K 3/36 (2006.01); H05K 1/03 (2006.01); H05K 1/02 (2006.01)

CPC C08K 3/36 (2013.01) [H05K 1/0373 (2013.01); H05K 1/0283 (2013.01); Y10T 428/2995 (2015.01)]

16 Claims

1. An insulating paste comprising:

an elastomer composition comprising silica particles (C) surface treated with a coupling agent (D); and

a solvent,

wherein the silane coupling agent (D) includes a silane coupling agent having a hydrophobic group and a silane coupling agent having a vinyl group,

wherein a content of the silica particles (C) is equal to or more than 5% by mass and equal to or less than 45% by mass with respect to an entire insulating paste, and

wherein the insulating paste has a viscosity of equal to or more than 1 Pa·s and equal to or less than 100 Pas at room temperature (25° C.).