Polyurethane elastomers, used for making moldings, e.g. shoe soles, are produced using an amine catalyst and a catalyst mixture of organic titanium and/or zirconium and lithium compounds in reaction of isocyanate and polyether polyol

摘要

Polyurethane are produced by reacting organic di- and/or polyisocyanate(s) with polyether polyol(s) (number average molecular weight (Mn) 800-25000 g/mole, average functionality 1.6-2.4), amine catalysts and 0.001-10 wt.% catalyst mixture containing organic titanium and/or zirconium compound(s) and organic lithium carboxylate(s) in a specified ratio. Polyurethane elastomers are produced by reacting: (a) organic di- and/or polyisocyanate(s) with (b) polyether polyol(s) with number average molecular weight Mn 800-25000 g/mole and an average functionality of 1.6-2.4, (c) amine catalysts and a catalyst mixture, containing (d) organic titanium (Ti) and/or zirconium (Zr) compound(s) and (e) organic lithium (Li) carboxylate(s), in an amount of 0.001-10 wt.% with respect to the total amount of compounds (b) to (e). The ratio of the amount(s) (nTi, nZr) of Ti and/or Zr ions in (d) to the amount (nLi) of Ti ions in (e) is 0.2-4, whilst the equivalence ratio of isocyanate (NCO) groups in (a) to the sum of NCO-reactive hydrogen (H) is (0.8-1.2):1. An Independent claim is also included for the production of these elastomers by the above method.