High styrene content stable polymer polyols using epoxy...

Details High styrene content stable polymer polyols using epoxy... High styrene content stable polymer polyols using epoxy...

C - Chemistry, Metallurgy

08

G

402/157, 400/470

C08G 59/00 (2006.01) C08G 18/63 (2006.01) C08G 18/64 (2006.01) C08J 3/11 (2006.01)

Patent

CA 1335319

Very low viscosity polymer polyol having high styrene/acrylo- nitrile ratios and good stability may be achieved by the use of epoxy resin-modified polyols as a dispersant. The epoxy resin-modified polyols useful as dispersants may be made by reacting a polyol initiator having an active hydrogen functionality of 3 to 8 and one or more alkylene oxides with an epoxy resin. It is preferred that all of the epoxy resin-modified base polyol dispersant be initially charged to the reactor, along with part of the base polyol. In this invention, the base polyol is a conventional polyol unmodified with epoxy resin. The use of epoxy resin-modified polyols as dispersants results in polymer polyols having higher styrene contents, and improved stability and viscosity properties.

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