polisilossanici polymers and method of preparazion

摘要

The invention relates to novel acrylate and substituted acrylate-functional polysiloxane polymers of the general formula IN WHICH THE R(s) may be the same or different and represent hydrogen or monovalent hydrocarbon radicals having from one to 12 carbon atoms, R' is a monovalent hydrocarbon radical, a halogenated monovalent hydrocarbon radical or a cyanoalkyl radical having from one to 18 carbon atoms, R'' is a divalent hydrocarbon radical having from one to 18 carbon atoms or the corresponding divalent hydrocarbon radical having C - O - C linkages, R''' is a radical selected from the class consisting of R''''O0.5 and R'3SiO0.5, Z is a group selected from the class consisting of OR'''', R''''or OSiR'3 in which R'''' is hydrogen or a monovalent hydrocarbon radical, a and b are each numbers of from 1 to 20,000, c is a number of from 0 to 3 and e is a number of from 0 to 2 and when c is equal to 0, then at least one Z must be OR''''. These polysiloxane polymers may be used as reactive intermediates for preparing copolymers, as sizing agents and as protective coatings.