发明授权
US4535178A Process for the preparation of polyether-ester polyols 失效
制备聚酯 - 酯多元醇的方法

Process for the preparation of polyether-ester polyols
摘要:
Polyether-ester polyols are prepared by reacting a polyether polyol, tetrahydrophthalic anhydride and an alkylene oxide in the presence of a catalyst selected from the group consisting of calcium naphthenate and cobalt naphthenate. These polyols may be used in preparing polyurethane products.
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