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US 5,688,860 AGranted
Polyurethane/polyurea elastomers
AssigneeMinnesota Mining and Manufacturing Company
InventorThomas Stone Croft
Life of this patent
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Abstract
Polyurethane/urea elastomers having an isocyanate equivalent index below 100, preferably from about 15 to about 80; containing an effective amount of polyisocyanate component, and an effective amount of an isocyanate reactive component comprising at least one polyamine and at least one polyol, wherein said elastomer contains from about 1 to about 199 equivalent percent amine per isocyanate equivalent.
Claims13
A flexible polyurethane/urea elastomer comprising a reaction product of
- a) a polyisocyanate component,
- b) an isocyanate-reactive component containing at least one polyamine selected from the group consisting of amine-terminated butadiene/acrylonitrile copolymers, and at least one polyol selected from the group consisting of polyalkadiene polyols derived from butadiene polymers, butadiene copolymers or hydrogenated derivatives thereof, said reaction product having an isocyanate index from about 15 to about 80,
- wherein said elastomer contains from about 1 to about 199 equivalent percent active amine hydrogen per isocyanate equivalent.
Dependencies are inferred from the claim text.