Rigid polyurethane modified polyisocyanurate containing fly ash

Details Rigid polyurethane modified polyisocyanurate containing fly ash Rigid polyurethane modified polyisocyanurate containing fly ash

1985-10-28

1987-04-28

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, 521160, 521902, 521906, C08G 1814

Patent

active

046615334

ABSTRACT:
This invention is a closed cell, rigid polyurethane-modified polyisocyanurate foam containing from about 10 to about 80 percent by weight of the foam of fly ash, which polyurethane-modified polyisocyanurate foam is prepared from a polyurethane-modified polyisocyanurate foam-forming composition which, when foamed to a density of about 1.75 pounds per cubic foot in the absence of the fly ash, forms a foam having a compressive modulus of about 150 to 325 pounds per square inch.

REFERENCES:
patent: 3830776 (1974-08-01), Carlson et al.
patent: 3917547 (1975-11-01), Massey
patent: 4164526 (1979-08-01), Clay et al.
patent: 4366204 (1982-12-01), Briggs
patent: 4425440 (1984-01-01), Bloembergen et al.

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