Patent ID: 6590057
Filing Date: 2003-07-08
Classification: C08G

Abstract:
A polyurethane elastomer prepared by reacting(a) an organic diisocyanate or a polyisocyanate with (b) at least one polyether polyol having a number-average molecular weight of 800 g/mol to 25,000 g/mol and an average functionality of 1.6 to 2.4, (c) optionally at least one polyether polyol differing from (b) and having a number-average molecular weight of 800 g/mol to 25,000 g/mol and an average functionality of 2.4 to 8, (d) optionally at least one polymer polyol containing 1 to 50 wt. % filler, relative to the polymer polyol, and having a hydroxyl value of 10 to 149 and an average functionality of 1.8 to 8, and (e) optionally at least one low-molecular chain extender having an average functionality of 1.8 to 2.1 and a molecular weight of up to 750 g/mol and/or at least one crosslinking agent having an average functionality of 3 to 4 and a molecular weight of up to 750 g/mol, in the presence of (f) at least one amine catalyst, and a catalyst mixture comprising (i) at least one organic titanium and/or zirconium compound, and (ii) at least one organic lithium carboxylate, and (iii) optionally at least one organic bismuth carboxylate, wherein the ratio of titanium ions and/or zirconium ions in component (f)(i) to lithium ions in component (f)(ii) is 0.2:1 to 4:1, (g) optionally at least one blowing agent, and (h) optionally at least one additive.