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AssigneeBayer MaterialScience AG
InventorsBruce Lawrey, Kurt Frisch, Nigel Barksby
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A polyol composition having a number average molecular weight of from about 1,000 to about 3,000 Daltons is made up of (1) at least 55% by weight of a low monol polyoxypropylene polyol having a number average molecular weight of from about 1,000 to 12,000 Da and a degree of unsaturation less than or equal to 0.02 meq/g and (2) no more than 45% by weight of a polyol having a number average molecular weight of from about 400 to about 1,000 Da and a polydispersity index greater than 1.1. This polyol composition is reacted with a diisocyanate, a polyisocyanate, an isocyanate-terminated prepolymer or an isocyanate-terminated quasi-prepolymer to produce polyurethanes, particularly, polyurethane elastomers having good physical and mechanical properties. Any of the known processes for producing polyurethanes, particularly, elastomers, including one-shot processes, may be used to produce polyurethanes in accordance with the present invention.
A polyurethane comprising the reaction product of a prepolymer having an NCO content of from about 3 to about 20% which is the reaction product of
A polyurethane comprising the reaction product of a prepolymer having an NCO content of from about 3 to about 20% which is the reaction product of
An elastomer produced by reacting
A polyurethane elastomer produced by reacting
The polyurethane elastomer produced by reacting
A one-shot process for the production of a polyurethane elastomer comprising
A polyurethane comprising the reaction product of
Dependencies are inferred from the claim text.