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US3043801A Prepolymer comprising the reaction product of a polyisocyanate, a polyalkylene etherpolyalcohol and an amine or phenol, reaction product thereof with formaldehyde, and process for preparing same 失效
包含多异氰酸酯,聚亚烷基醚多元醇和胺或苯酚的反应产物的预聚物,其与甲醛的反应产物及其制备方法

Prepolymer comprising the reaction product of a polyisocyanate, a polyalkylene etherpolyalcohol and an amine or phenol, reaction product thereof with formaldehyde, and process for preparing same
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