Patent ID: 8455679

Claim:
A prepolymer system having a monomeric isocyanate content of no greater than about 10% by weight based on 100 parts by weight of said prepolymer system, said prepolymer system comprising: I) a diluent component having an excess of isocyanate functional groups and comprising the reaction product of a monohydric isocyanate-reactive component, and an excess of a first isocyanate component relative to said monohydric isocyanate-reactive component, said first isocyanate component comprising polymeric diphenylmethane diisocyanate and monomeric isocyanates reactive with said monohydric isocyanate-reactive component and having at least two isocyanate functional groups reactive with said monohydric isocyanate-reactive component; and II) a prepolymer component different than and separate from said diluent component, said prepolymer component also having an excess of isocyanate functional groups and comprising the reaction product of a polyol component having at least two hydroxyl functional groups, and an excess of a second isocyanate component relative to said polyol component, said second isocyanate component having at least two isocyanate functional groups reactive with said polyol component.