Rogers Corporation
METHOD FOR DELAYING CURING IN POLYURETHANE AND COMPOSITIONS AND ARTICLES MADE THEREFROM

Abstract:

A method for the manufacture of a polyurethane includes forming a curable composition comprising an active hydrogen-containing component, an organic isocyanate component reactive with the active hydrogen-containing component, a metal catalyst, preferably a metal acetylacetonate, and a catalytic inhibitor effective to inhibit gelling of the curable composition for at least 4.7 minutes, preferably at least 5 minutes at a temperature of 55.degree. C.; processing the curable composition at a first temperature without curing the curable composition; and curing the curable composition to provide the polyurethane.