Closed cell, rigid polyurethane foam

Details Closed cell, rigid polyurethane foam Closed cell, rigid polyurethane foam

1989-09-15

1991-05-07

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521159, 521167, 521172, 521174, 521176, C08G 1814

Patent

active

050137662

ABSTRACT:
The present invention is directed to the discovery that relatively long chain polyols, which are typically used to produce flexible foams, can be used to produced closed cell rigid polyurethane foams.

REFERENCES:
patent: 4092276 (1978-05-01), Narayan
patent: 4094828 (1978-06-01), Klein
patent: 4362823 (1982-12-01), Wernsing
patent: 4923904 (1990-05-01), Hasegawa et al.

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