Rigid shrink stable polyurethane foam derived from an adduct of

Details Rigid shrink stable polyurethane foam derived from an adduct of Rigid shrink stable polyurethane foam derived from an adduct of

1978-03-22

1981-02-03

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521159, 521174, 521175, C08G 1814

Patent

active

042489750

ABSTRACT:
A rigid shrink stable polyurethane foam having a K factor value below 0.22 and having substantially all closed cells is prepared from a reaction product of an arylene polyisocyanate and an addition product of an alkylene oxide having at least three carbon atoms and a polyol having at least four hydroxy groups using a chlorofluoro-lower alkane blowing agent.

REFERENCES:
patent: 2962183 (1960-11-01), Rill et al.
patent: 3084177 (1963-04-01), Hostettler et al.
patent: 3846347 (1974-11-01), Satterly
Chemical & Engineering News, Jun. 3, 1957, p. 90.
General Tire & Rubber Co., Italian No. 559,499, Granted Mar. 21, 1957, Translation cited.

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