Patent ID: 6054499
Filing Date: 2000-04-25
Classification: C08G,C08J,C08K,C08L

Abstract:
A filled pressurized can comprising:(A) a can, and(B) a prepolymer composition for producing dimensionally stable polyurethane insulating foams, which prepolymer composition itself comprises:(i) a prepolymer component which has at least one polyurethane prepolymer which has a content of NCO groups of 4 to 20 wt % and optional additives, and(ii) polybutadiene selected from the group consisting of a liquid polybutadiene and liquid copolymers of 1,3-polybutadiene which have up to 50 mol % of other organic dienes or vinyl aromatic compounds, and(C) a propellant component,wherein said prepolymer composition comprises between 0.01 to 2 wt % of polybutadiene, based on the weight of the prepolymer component,wherein said liquid polybutadiene or its liquid copolymers have a molecular weight of between 1,000 to 9,000 and have the ability to cross-link with each other in the presence of oxygen.