Patent ID: 6552097
Filing Date: 2003-04-22
Classification: C08G,C08J,C08K,C08L,Y10S

Abstract:
A prepolymer composition for producing polyurethane insulating foams from pressure tanks, which composition comprises: a prepolymer component with at least one polyurethane (PU) prepolymer having a content of NCO groups of 4 to 20 wt % and additives, and a propellant component, wherein said at least one PU prepolymer comprises a polyisocyanate with a content of less than 2 wt %, based on the prepolymer component of monomeric polyisocyanatewherein said prepolymer composition comprises at least one polyurethane prepolymer made from tolylene diisocyanate (TDI) wherein the PU prepolymer has an initial service viscosity at 20Â° C. of 5,000 to 20,000 mPa.s.