A process for preparation of polyurethanes by reaction of a polyol component with a polyisocyanate prepolymer useful for production of automobile body parts, e.g. rear boot covers, front wings, roof modules, bonnets, and boots

摘要

Preparation of polyurethanes by reaction of a polyol component (A) with a polyisocyanate prepolymer (B) where the polyol component comprises: (A1) polyetherol of OH number 10-100; (A2) a crosslinking polyetherol of OH number 500-1000; (A3) a chain lengthening agent based on amines and the polyisocyanate prepolymer, (B) obtained by reaction of (B1) a polyisocyanate with (B2) a poly-tetrahydrofuran. A process for preparation of polyurethanes by reaction of a polyol component (A) with a polyisocyanate prepolymer (B) where the polyol component comprises: (A1) polyetherol of OH number 10-100; (A2) a crosslinking polyetherol of OH number 500-1000; (A3) a chain lengthening agent based on amines and the polyisocyanate prepolymer, (B) obtained by reaction of (B1) a polyisocyanate with (B2) a poly-tetrahydrofuran. Independent claims are included for: (1) a polyurethane obtained as above; and (2) automobile external parts containing polyurethane as above.