High performance modified polyurethanes

Details High performance modified polyurethanes High performance modified polyurethanes

1989-09-08

1990-09-11

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 54, 528 55, 528 58, 528 76, 528 80, 528 83, 528 84, 528 85, 524871, 524875, 524876, 525454, C08G 1832, C08G 1818, C08G 1824

Patent

active

049564390

ABSTRACT:
Modified polyurethane products, exhibiting good physical strength and excellent heat resistance, and especially improved heat sag properties, are prepared by blending a polyol component containing at least 1% of at least one polynuclear aromatic polyol or a derivative thereof, or a mononuclear diol or a derivative thereof, at a temperature of 100.degree.-180.degree. C., to form a first liquid component; admixing the first liquid component with a second liquid component containing a diisocyanate or polyisocyanate, one of the two liquid components containing a catalyst; and reacting and molding the admixture in a mold kept at a temperature of from 80.degree.-140.degree. C. by reaction injection molding.

REFERENCES:
patent: 3706680 (1972-12-01), Booth
patent: 4041208 (1977-08-01), Seeger et al.
patent: 4254069 (1981-03-01), Dominquez et al.
patent: 4272618 (1981-06-01), Dominquez et al.
patent: 4301110 (1981-11-01), Cuscurida et al.
patent: 4314962 (1982-02-01), Wollensak et al.

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