Patent ID: 7015296
Filing Date: 2006-03-21
Classification: C08G

Abstract:
1. A process for preparing a linear organosiloxane polymer, comprising the step of reacting a compound of the following formula (1) with a compound of the following formula (2) in the presence of an alkaline compound and under conditions that do not substantially promote equilibration reaction, thereby producing a linear organosiloxane polymer having a single peak molecular weight distribution with minimized formation of cyclics, formula (1): wherein R 1 is each independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, R 2 is each independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and n is an integer of 0 to 500, formula (2): wherein R 2 is as defined above, R 3 is each independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or a hydroxyl group, and m is an integer of 10 to 3,000.