Preparation of polymer polyols

摘要

PCT No. PCT/GB85/00176 Sec. 371 Date Nov. 22, 1985 Sec. 102(e) Date Nov. 22, 1985 PCT Filed Apr. 24, 1985 PCT Pub. No. WO85/04891 PCT Pub. Date Nov. 7, 1985.A novel family of modified polyols suitable for use in the preparation of fluid polymer/polyols. The modified polyols are the reaction product obtained by reacting a silicon atom containing compound with an unmodified polyol, the silicon atom compound being one which has (a) at least olefinically unsatured hydrocarbyl group and (b) at least one functional group which is reactable with the hydroxy groups on the polyol. Examples of such silicon atom containing compounds include vinyltriethoxysilane and vinyltrimethoxysilane. Modified polyols of the type described are particularly useful in the preparation of polymer/polyols containing high levels of polymer since they reduce the viscosity of the final polymer/polyol and decrease the tendency of the polymer/polyol to produce polymer sediment.