Rigid polyurethane foams with low thermal conductivities

Details Rigid polyurethane foams with low thermal conductivities Rigid polyurethane foams with low thermal conductivities

1990-02-20

1991-04-16

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521160, 521167, 521172, 521173, C08G 1842, C08G 1848

Patent

active

050082990

ABSTRACT:
Disclosed are rigid cellular polyurethanes prepared by bringing together under foam forming conditions an aromatic polyisocyanate and a polyhydric combination comprising a major proportion of a crude polyester polyol and minor proportion of a cross-linking polyol. This selection of particular ingredients gives rise to foams having extremely low initial insulation K factor values.

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