Patent ID: 9475969
Filing Date: 2016-10-25
CPC Classification: C08F,C08G,C08L,C09D,C09J,C09K

Claim Text:
1. A method for preparing an organosiloxane polymer having an alkoxysilyl-ethylene group at its terminal which comprises subjecting an organopolysiloxane compound which is either a linear or a branched, and having at least one unit of the following formula (1′) as a partial structure and an alkoxysilane to addition reaction according to the following reaction formula, to prepare an organosiloxane polymer which is either a linear or a branched, and having an alkoxysilyl-ethylene group at its terminal having at least one unit of the following formula (1″) in a molecule, wherein R represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms which may have a substituent; each R may be the same or different from each other; “m′” represents an integer of 0 to 2,000, parts of a repeating unit of the siloxane bond may be crosslinked to form a branched chain structure; “n” represents an integer of 0 to 20; R