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Polyurethane prepolymers to produce elastomers having improved dynamic properties and process for their preparation
Polyurethane prepolymers to produce elastomers having improved dynamic properties and process for their preparation
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机译:用于生产具有改善的动态性能的弹性体的聚氨酯预聚物及其制备方法
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摘要
An isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyisocyanate and a polyol composition consisting essentially of a polyether polyol of 350-2000 equivalent weight and a low molecular weight polyol of 62 to 300 molecular weight, in an equivalent ratio of low molecular weight polyol to polyether polyol of 0.25-2.7:1. A polyurethane-urea elastomer having good dynamic properties can be prepared by reacting the isocyanate-terminated prepolymer with an aromatic amine chain extender at an equivalent ratio of 0.9-1.1:1. IMAGE
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