Rigid polyurethane foams with low thermal conductivities

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

1991-01-08

1992-12-08

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521173, C08G 1814

Patent

active

051698773

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.

REFERENCES:
patent: 4576974 (1986-03-01), Carroll et al.
patent: 5008299 (1991-04-01), Tucker et al.

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