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Thermoplastically processable polyurethane elastomers with abrasion resistance, and process for preparing same
Thermoplastically processable polyurethane elastomers with abrasion resistance, and process for preparing same
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机译:具有耐磨性的可热塑性加工的聚氨酯弹性体及其制备方法
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摘要
1. Thermoplastically processable polyurethane elastomers obtained by reacting a) organic diisocyanates, b) polyester-polyols having a molecular weight of from 800 to 5000 and prepared by polycondensation of a dicarboxylic acid mixture which contains 20 to 40% by weight of succinic acid, 35 to 60% by weight of glutaric acid, and 20 to 40% by weight of adipic acid, based on the total weight of the said dicarboxylic acids, and diols or mixtures of diols and diamines or alkanolamines, c) difunctional chain extenders having a molecular weight of from 60 to 350, and d) tri- to hexafunctional crosslinking agents, the ratio of NCO groups to the sum of all hydrogen atoms of components b), c) and d) which react with NCO groups being from 1:0.9-1.2.
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