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US 5,314,983 AGranted
Process for curing polymerizable liquid compositions based on polyisocyanates and epoxides
AssigneeEnichem S.p.A.
InventorsMark T. DeMeuse, Fabrizio Parodi
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Abstract
Mixtures of polyisocyanates and epoxides are cured by microwave irradiation, optionally with microwave or thermal post-curing to produce cured polymer articles having good chemical, electrical and mechanical properties.
Claims15
A process for curing a composition containing:
- (a) at least one organic polyisocyanate;
- (b) at least one polyepoxide or a monoepoxide or a mixture thereof;
- (c) 0.02-3% by weight with respect to components (a) and (b) of at least one compound which can catalyze the reaction of epoxides and isocyanates to form 2-oxazolidone structure;
- which comprises irradiating said composition with pulsed or continuous electromagnetic radiation in the microwave frequency range from 10.sup.8 to 10.sup.11 hertz at a curing temperature between room temperature and 180.degree. C. to produce a solid material.
1 more element
Dependencies are inferred from the claim text.