Patent ID: 6103851
Filing Date: 2000-08-15
Classification: C08G

Abstract:
Composition useful in preparing a polyurethane elastomer comprisingA) i) one or more polyols having hydroxyl functionality of about 3.2 or greater and a weight average molecular weight of about 2000 to about 6000 wherein the polyols are the reaction product of one or more initiators having an average functionality of about 4 or greater and one or more alkylene oxides wherein the initiator is selected from the group consisting of sorbitol, a mixture of sucrose and glycerin, an adduct of an epoxy resin and a glycol, or an adduct of novolac resin and one or more alkylene oxides or a mixture thereof; orii) a) one or more polyols having hydroxyl functionality of about 3.2 or greater and a weight average molecular weight of greater than about 6000 wherein the polyols are the reaction product of one or more initiators having an average functionality of about 4 or greater and one or more alkylene oxides wherein the initiator is selected from the group consisting of sorbitol, a mixture of sucrose and glycerin, an adduct of an epoxy resin and a glycol, or an adduct of novolac resin and one or more alkylene oxides or a mixture thereof; andb) one or more cross-linkers having an equivalent weight of about 200 or less;B) one or more organic isocyanates; andC) one or more catalysts for the reaction of isocyanate containing compounds with active hydrogen containing compounds;wherein the ratio of isocyanate moieties to active hydrogen containing moieties is from about 0.9:1.0 to about 1.5:1.0.