High styrene content stable polymer polyols using epoxy resin-mo

Details High styrene content stable polymer polyols using epoxy resin-mo High styrene content stable polymer polyols using epoxy resin-mo

1988-05-24

1989-08-08

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

525111, 525122, C08G 1814

Patent

active

048553301

ABSTRACT:
Low viscosity polymer polyols having high styrene/acrylonitrile ratios and good stability may be achieved by the use of epoxy resin-modified polyols as the base polyols. The styrene/acrylo-nitrile ratio may be as high as 95/5 and even 100/0 in the polymer polyols. The epoxy resin-modified polyols useful as base polyols 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 only a small part of the epoxy resin-modified base polyol be initially charged to the reactor, and that the balance, a relatively larger part, be a part of the monomer feed stream to the reactor.

REFERENCES:
patent: 4316991 (1982-02-01), Speranza et al.
patent: 4495341 (1985-01-01), Stamberger
patent: 4539339 (1985-09-01), Cuscurida et al.
patent: 4539378 (1985-09-01), Cuscurida et al.

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