Patent ID: 6770730
Filing Date: 2004-08-03
Classification: C08G

Abstract:
A veneer made from a reaction mixture comprising:a) an isocyanate, b) a mixture (b1) of isocyanate-reactive compounds comprising: b11) from 15 to 90% by weight, based on the weight of the mixture (b1), of a first polyether polyalcohol, said first polyether polyalcohol comprising a hydroxyl functional initiator and propylene oxide, having a number average molecular weight of from 400 to 6000 and a mean functionality of from 1.5 to 3; b12) from a positive amount to 20% by weight, based on the weight of the mixture (b1), of a second polyether polyalcohol, said second polyether polyalcohol comprising an amine functional initiator and propylene oxide, having a number average molecular weight of from 400 to 6000 and a mean functionality of from 1.5 to 3; b13) from 2 to 15% by weight, based on the weight of the mixture (b1), of a third polyether polyalcohol having a number average molecular weight of from 150 to 7000 and a mean functionality of from 2.1 to 5; b14) from a positive amount to 30% by weight, based on the weight of the mixture (b1), of a bifunctional chain extender; and, optionally, c) catalysts and/or; d) auxilaries and/or additives; wherein said chain extender, said first, said second and said third polyether polyalcohols are mutually exclusive of and structurally distinct from each other, and wherein the percentages by weight of components b11, b12, b14, and b13 total 100% of b1.