Patent ID: 8022150
Filing Date: 2011-09-20
Classification: C08G,C08J,C08L,C09D

Abstract:
1. A process for preparing polyoxyalkylene-polysiloxane block polymers of the general formula (I) in which A is a polyoxyalkylene block of the general formula —(C B is a polysiloxane block of the general formula —(SiR C and C R are identical or different C R Z is an alkyl, alkylene, aryl or alkylaryl radical, a is 1 to 20, b is an average value from 10 to 130, c is 3 to 100, d is independently at each occurrence in C/C n is 2 to 12, with an average numerical value of 2.7 to 4.0, by reacting A) polyoxyalkylene alcohols of the general formula R B) polysiloxanes of the general formula Cl—(R) which comprises also using C) polyoxyalkylene alcohols of the general formula Z—O—(CH