Rigid foam with improved "k" factor by reacting a polyisocyanate

Details Rigid foam with improved "k" factor by reacting a polyisocyanate Rigid foam with improved "k" factor by reacting a polyisocyanate

1989-04-24

1991-11-12

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 99, 521159, 521172, 521902, 4283084, 4284231, C08G 1814

Patent

active

050648730

ABSTRACT:
Rigid cellular polymers are made by reacting an isocyanate-terminated quasi-prepolymer with a polyol component comprising a polyester polyol having a free glycol content of less than about 7 percent by weight of the polyester polyol in the presence of a blowing agent. The combined use of the quasi-prepolymer and the polyester polyol enhances the thermal insulating properties of the foams.

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