Cross-linked polyurethane elastomers and microcellular foams

Details Cross-linked polyurethane elastomers and microcellular foams Cross-linked polyurethane elastomers and microcellular foams

1979-03-05

1980-11-25

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 73, 528 75, 528906, C08G 1814, C08G 1832

Patent

active

042359775

ABSTRACT:
Cross-linked polyurethanes such as solid elastomeric polyurethanes or microcellular polyurethanes are prepared by reacting a polyisocyanate, one or more polyols and at least one trihydroxy compound in the presence of a catalyst using, as the hydroxyl compounds a low molecular weight diol, optionally a polymeric polyol and tris-(.beta.-hydroxypropyl)-isocyanaurate or ethoxylated tris-(.beta.-hydroxypropyl)-isocyanurate all present in specific ranges of proportions. Use of the specific isocyanurates provides for better utilization and smaller quantities of the blowing agent used to make microcellular polyurethane foams.

REFERENCES:
patent: 2052490 (1936-08-01), Reinhardt et al.
patent: 3174950 (1965-03-01), Cordier
patent: 3730923 (1973-05-01), Formaini et al.
patent: 4031040 (1977-06-01), DenOtter et al.
patent: 4063020 (1977-12-01), DenOtter et al.
Saunders et al. Polyurethanes, Part I, Interscience, N.Y. (1962), pp. 32-48.

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