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    • 3. 发明授权
    • Condensation polymerization method for isocyanates
    • 异氰酸酯缩合聚合法
    • US06653432B2
    • 2003-11-25
    • US10168020
    • 2002-06-18
    • Frédéric DallemerJean-Marie BernardDenis RevelantFrédéric Leising
    • Frédéric DallemerJean-Marie BernardDenis RevelantFrédéric Leising
    • C08G1822
    • C08G18/092C08G18/022C08G18/222
    • The invention concerns a (cyclo)trimerisation method for isocyanates having at least two isocyanate functions, characterised in that it comprises: a) reacting initial isocyanate monomers having at least two isocyanate functions, optionally in the presence of other monomers reactive with the isocyanate monomers having at least two isocyanate functions at a temperature of at least 20° C., advantageously at least 50° C., and lower than 200° C., advantageously lower than 150° C., in the presence of a compound comprising at least one rare earth alcoholate function; b) stopping the reaction by inactivating the catalyst or its derivative forms in the reaction medium at a transformation rate of at least 2.5% and at most 90% of the initial isocyanate functions; and optionally c) distilling the reaction medium to eliminate the unreacted monomers.
    • 本发明涉及具有至少两种异氰酸酯官能团的异氰酸酯的(环)三聚方法,其特征在于其包括:a)使具有至少两个异氰酸酯官能团的初始异氰酸酯单体反应,任选地在与具有 至少两个异氰酸酯官能团在至少20℃,有利地至少50℃,低于200℃,有利地低于150℃的温度下,在包含至少一种 稀土醇酸盐功能; b)通过使反应介质中的催化剂或其衍生物形式以初始异氰酸酯官能团的至少2.5%和至多90%的转化速率失活来停止反应; 并且任选地c)蒸馏反应介质以除去未反应的单体。