PROCESS FOR PRODUCING POLYURETHANE ELASTOMER

摘要

A polyurethane elastomer is produced by mixing a hardener composition containing a polyamine, a long chain poiyol having an average molecular weight of 300 to 4,000 and a catalyst with an isocyanate composition comprising a prepolymer having terminal isocyanate group and an average molecular weight of 500 to 5,000 and an organic diisocyanate monomer with or without a triisocyanate monomer, the ratio of isocyanate groups of said prepolymer to amino groups of said polyamine being in the range of 0.6 : 1 to 1.5 : 1 and the ratio of a total of isocyanate groups in said isocyanate composition to the sum of amino groups of said polyamine and hydroxyl groups of said long chain polyol is in the range of 0.8 : 1 to 1.4 : 1.