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聚氨酯 | 拉挤成型工艺及应用
聚氨酯是以低聚物多元醇和异氰酸酯为主要原料合成的一种主链含有氨基甲酸酯基团(-NHCOO-)的聚合物。与传统树脂相比,聚氨酯与增强材料的结合更好,因此抗冲击性能、力学性能和耐候性优异。 聚氨酯树脂中不含苯乙烯等挥发物,完全满足国家对“加强 ...
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