US 12,378,414 B2
Curable organopolysiloxane composition, cured product, and electric/electronic equipment
Lei Fang, Shanghai (CN); Chen Chen, Shanghai (CN); Yan Huang, Shanghai (CN); Masayuki Onishi, Ichihara (JP); Toyohiko Fujisawa, Ichihara (JP); Qi Chen, Shanghai (CN); and Guijun Yang, Guangdong (CN)
Assigned to DOW SILICONES CORPORATION, Midland, MI (US); and DOW TORAY CO., LTD., Tokyo (JP)
Appl. No. 17/629,858
Filed by DOW SILICONES CORPORATION, Midland, MI (US); and DOW TORAY CO., LTD., Toyko (JP)
PCT Filed Jul. 26, 2019, PCT No. PCT/CN2019/097918
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/016743, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0275206 A1, Sep. 1, 2022
Int. Cl. C08L 83/04 (2006.01)
CPC C08L 83/04 (2013.01) [C08L 2205/025 (2013.01); C08L 2205/035 (2013.01)] 12 Claims
 
1. A curable organopolysiloxane composition, comprising:
(A) 100 parts by mass of an organopolysiloxane having at least two alkenyl groups with 2 to 12 carbon atoms per molecule;
(B) 0.05 to 5 parts by mass of an organosiloxane having one silicon atom-bonded hydrogen atom per molecule and free of alkenyl groups and silicon atom-bonded alkoxy groups;
(C) 0.01 to 10 parts by mass of an organosiloxane having one silicon atom-bonded hydrogen atom and at least one silicon atom-bonded alkoxy group per molecule and free of alkenyl groups;
(D) 0.1 to 20 parts by mass of an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule and free of alkenyl groups and silicon atom-bonded alkoxy groups;
(E) a catalytic amount of a hydrosilylation reaction catalyst; and
(F) a catalytic amount of a condensation reaction catalyst;
wherein a mole ratio of the silicon atom-bonded hydrogen atoms in components (B), (C) and (D) with respect to the alkenyl groups in component (A) is in a range of 0.2 to 0.9.