High styrene content, stable polymer using epoxy resin-modified

Details High styrene content, stable polymer using epoxy resin-modified High styrene content, stable polymer using epoxy resin-modified

1988-05-24

1990-01-02

Lieberman, Allan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

525549, 525131, C08K 504, C08L 7504

Patent

active

048913952

ABSTRACT:
Very low viscosity polymer polyols having high styrene/acrylonitrile ratios and good stability may be achieved by the use of epoxy resin-modified polyols as dispersants. 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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