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The Olin Corporation patent solves the following problem:
This invention relates to a composition and method useful in fabricating high temperature degradation resistant rigid foams and more particularly concerned with a composition and method useful in fabricating thermally durable urethane-free oxazolidone-modified isocyanurate foams and foams thus prepared.
Our analysis of this patent is as follows:
Olin Corporation’s patent US 4699931 A deals with Oxazolidone-modified isocyanurate foams and a composition and method for their production.
Oxazolidone-containing isocyanurate foams characterized by thermal stability at a temperature of about 140 C. or higher. These foams produced by the reaction of at least one polyisocyanate with at least one polyepoxide in the presence of catalyst, surfactant, and blowing agents.
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