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    Stock Code

    888888

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    潜固化剂的固化机理

    2021-10-14 2959

      潜固化剂的固化机理和传统的湿固化机理不同,添加潜固化剂的湿固化聚氨酯体系,水分优先与体系中的潜固化剂反应并生成含活泼氢的基团(而不是与异氰酸酯基反应),活泼氢再与异氰酸酯基反应固化,整个过程不产生二氧化碳气体,因此可避免诸如表面模糊(低光泽)、针孔及起泡等表面缺陷。

      醛(酮)亚胺与水反应得到二胺和醛(或酮)。噁唑烷与水反应得到β-醇胺和酮(或醛)。

      反应式如下: