US 11,787,823 B2
Diterminally silanol-modified perfluoropolyether compound and preparation thereof
Masato Kawakami, Joetsu (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Filed by Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
Filed on Jul. 30, 2021, as Appl. No. 17/389,988.
Claims priority of application No. 2020-131626 (JP), filed on Aug. 3, 2020.
Prior Publication US 2022/0033422 A1, Feb. 3, 2022
Int. Cl. C07F 7/08 (2006.01)
CPC C07F 7/0838 (2013.01) [C07F 7/0878 (2013.01)] 4 Claims
 
1. A diterminally silanol-modified perfluoropolyether compound of general formula (1) below

OG Complex Work Unit Chemistry
wherein each R1 is independently an unsubstituted linear alkenylene group or a branched alkenylene group of 2 to 10 carbon atoms, each R2 is independently a substituted or unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, Rf is a perfluoropolyether group, and the subscript ‘n’ is independently at each occurrence an integer from 1 to 7.