Patent ID: 8088493
Filing Date: 2012-01-03
Classification: C08G,C08L,Y10T

Abstract:
1. An aqueous composition comprising a polyurethane vinyl hybrid dispersion and ≦0.5 wt % of 1-methyl-2-pyrrolidinone by weight of the composition, wherein the polyurethane has an acid value in the range of from to 24 to 65 mgKOH/g and is the reaction product of: A) an isocyanate-terminated prepolymer formed from components comprising: B) at least one active-hydrogen chain extending compound; in the presence of (a) ≦5 wt % of 1-methyl-2-pyrrolidinone by weight of polyurethane, (b) 5 to 100 wt % of 1-ethyl-2-pyrrolidinone by weight of polyurethane and (c) water.