Method of making a polyurethane foam having improved flame retar

Details Method of making a polyurethane foam having improved flame retar Method of making a polyurethane foam having improved flame retar

1995-10-27

1998-11-17

Cooney, Jr., John M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521122, 521131, 521155, 556445, C08J 904

Patent

active

058377425

ABSTRACT:
There is now provided a method for making a polyisocyanate based rigid closed cell foam by reacting an organic isocyanate and a polyol composition containing a polyol having polyester linkages and a number average molecular weight of 400 or more, and at least about 8 php of a silicone-containing surfactant polymer, in the presence of an aliphatic or cycloaliphatic C.sub.4 -C.sub.7 hydrocarbon blowing agent. Either mixed into the polyol composition at the time of foaming, mixed into an isocyanate, or both, is an aliphatic or cycloaliphatic C.sub.4 -C.sub.7 hydrocarbon.

REFERENCES:
patent: 3505377 (1970-04-01), Morehouse et al.
patent: 5510054 (1996-04-01), Mussini

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