Rigid foams using CHCLF.sub.2 as a blowing agent

Details Rigid foams using CHCLF.sub.2 as a blowing agent Rigid foams using CHCLF.sub.2 as a blowing agent

1992-12-10

1993-12-28

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521167, 521174, 521175, C08J 908, C08J 914

Patent

active

052740072

ABSTRACT:
A method for preparation of rigid foam disclosed The method comprises mixing at least two components to form a reaction mixture. The reaction mixture comprises isocyanate, up to about 20% by weight CHClF.sub.2, up to about 2% by weight of water, and a combination of polyols having an overage OH number of from about 300 to about 500 and comprising polyalkoxylated glycerin having an OH number of from about 200 to about 300 and in which the alkoxy groups each have from two to about three carbon atoms. Related methods and compositions are also disclosed.

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