Cross-linked polyurethanes

Details Cross-linked polyurethanes Cross-linked polyurethanes

C - Chemistry, Metallurgy

08

G

402/139, 400/201

C08G 18/78 (2006.01) C08G 18/14 (1980.01)

Patent

CA 1163748

ABSTRACT OF THE DISCLOSURE 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)-isocyanurate 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.

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