Process for producing a urethane-modified polyisocyanurate foam

Details Process for producing a urethane-modified polyisocyanurate foam Process for producing a urethane-modified polyisocyanurate foam

1985-10-17

1987-03-03

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521172, 521173, C08G 1814

Patent

active

046475958

ABSTRACT:
A process for producing a urethane-modified polyisocyanurate foam by using at least four components of a polyol, a polyisocyanate compound in an excess amount relative to the polyol, an isocyanate trimerizing catalyst and a foaming agent, as the essential starting materials, wherein a polyester ether polyol comprising, as the constituting units, residues of polyhydric phenols and/or polyhydric alcohols, residues of polybasic carboxylic acids and oxyalkylene groups and having a hydroxyl value of from about 100 to about 500, is employed as at least a part of said polyol.

REFERENCES:
patent: 4039487 (1977-04-01), Kolakowski et al.
patent: 4246365 (1981-01-01), Wiedermann et al.
patent: 4307205 (1981-12-01), Bershas
patent: 4336341 (1982-06-01), Fujiwara et al.
patent: 4400477 (1983-08-01), Blanpied
patent: 4469824 (1984-09-01), Grigsby et al.

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