	US 12,122,935 B2
	Curable organopolysiloxane composition for forming film and production method for organopolysiloxane cured product film
Hiroshi Fukui, Ichihara (JP); Takeaki Tsuda, Ichihara (JP); and Hua Ren, Shanghai (CN)
Assigned to Dow Toray Co., Ltd., Tokyo (JP); and Dow Silicones Corporation, Midland, MI (US)
Appl. No. 17/420,149
Filed by Dow Toray Co., Ltd., Tokyo (JP); and Dow Silicones Corporation, Midland, MI (US)
PCT Filed Dec. 6, 2019, PCT No. PCT/JP2019/047740 § 371(c)(1), (2) Date Jul. 1, 2021, PCT Pub. No. WO2020/116596, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-229642 (JP), filed on Dec. 7, 2018.
Prior Publication US 2022/0064448 A1, Mar. 3, 2022
Int. Cl. C09D 183/08 (2006.01); C08G 77/08 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01); C08G 77/24 (2006.01); C08J 5/18 (2006.01); C08K 5/01 (2006.01); C08K 5/03 (2006.01); C08K 5/07 (2006.01); C08K 5/14 (2006.01); C08K 5/5419 (2006.01); C08L 83/04 (2006.01)

CPC C09D 183/08 (2013.01) [C08G 77/08 (2013.01); C08G 77/12 (2013.01); C08G 77/20 (2013.01); C08G 77/24 (2013.01); C08J 5/18 (2013.01); C08K 5/01 (2013.01); C08K 5/03 (2013.01); C08K 5/07 (2013.01); C08K 5/14 (2013.01); C08K 5/5419 (2013.01); C08L 83/04 (2013.01); C08K 2201/019 (2013.01); C08L 2203/16 (2013.01); C08L 2312/06 (2013.01); C08L 2312/08 (2013.01)]

16 Claims

1. A curable organopolysiloxane composition for forming a film, comprising:

a curing reactive organopolysiloxane;

a curing agent; and

one or more organic solvents selected from the group consisting of (D1) organic polar solvents, (D2) low molecular weight siloxane solvents, (D3) halogen solvents, and mixed solvents thereof;

wherein the viscosity of the entire composition measured at a shear rate of 0.1 (s⁻¹) at 25° C. is 100,000 mPa·s or less, and the viscosity of the entire composition measured at a shear rate of 10.0 (s⁻¹) is within a range of 5 to 50,000 mPa·s,

wherein the thixotropic ratio, which is a ratio of the viscosity of the entire composition measured at a shear rate of 0.1 (s⁻¹) to the viscosity of the entire composition measured at a shear rate of 10.0 (s⁻¹), is 25.0 or less; and

wherein an organopolysiloxane cured product, obtained by curing the curable organopolysiloxane composition, has a dielectric constant measured at 1 KHz and 25° C. of 3 or higher.