US 11,655,369 B2
Trialkoxy functional branched siloxane compositions
Dorab Bhagwagar, Auburn, MI (US); Peng Wei, Shanghai (CN); Qianqing Ge, Shanghai (CN); Yan Zheng, Shanghai (CN); and Zhanjie Li, Auburn, MI (US)
Appl. No. 17/439,855
Filed by Dow Silicones Corporation, Midland, MI (US)
PCT Filed Oct. 28, 2020, PCT No. PCT/CN2020/124320
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2022/087880, PCT Pub. Date May 5, 2022.
Prior Publication US 2023/0090031 A1, Mar. 23, 2023
Int. Cl. C08L 83/04 (2006.01); C08K 3/013 (2018.01)
CPC C08L 83/04 (2013.01) [C08K 3/013 (2018.01); C08K 2201/001 (2013.01)] 10 Claims
1. A composition comprising an organopolysiloxane having the average chemical structure (I):
[R′R2SiO—(R2SiO)m]3—Si—[OSiR2]n—Y—Si(OR)3  (I)
R is independently in each occurrence selected from alkyl, aryl, substituted alkyl and substituted alkyl groups having from one to 8 carbon atoms;
R′ is independently in each occurrence selected from R and terminally unsaturated alkylene groups having from 2 to 6 carbon atoms;
Y is selected from a group consisting of: X and X—(R2SiO)pSiR2—X;
wherein p has an average value in a range of one to 3; and X is independently in each occurrence selected from alkylene and substituted alkylene groups having from one to 6 carbon atoms; and
the average values for subscripts m and n are each greater than zero and independently selected so that the average value for the sum of all of the average m values and the average n values is in a range of 30-200.