Patent ID: 6908979

Claim:
A reaction system for the production of elastic polyurethane gels comprising: a. an isocyanate-reactive composition comprising: i. greater than 75% by weight of an isocyanate-reactive organic mono-ol having a molecular weight of from greater than 1500 to about 3000[1000 or greater], and ii. from greater than 1 to less than 10% by weight of an organic crosslinker having a nominal isocyanate-reactive group functionality of 3 or greater and an equivalent weight per isocyanate-reactive functional group of less than 150; and b. an organic polyisocyanate composition, wherein the ratio of isocyanate groups to isocyanate-reactive groups in the reaction system is between 0.70 and 1.30 and the reaction system is essentially free of isocyanate-reactive monomers or oligomers other than those present in the isocyanate-reactive composition.