Water feed methods to control MW distribution and byproducts of the carbamylation of urea
    30.
    发明授权
    Water feed methods to control MW distribution and byproducts of the carbamylation of urea 有权
    用于控制尿素氨基甲酰化的MW分布和副产物的供水方法

    公开(公告)号:US09403759B2

    公开(公告)日:2016-08-02

    申请号:US14721423

    申请日:2015-05-26

    Abstract: The present invention provides methods for making a polycarbamate by feeding a) a urea in fluid form into a reaction medium containing b) an alkyd polyol, such as a short or med oil alkyd polyol to form a reaction mixture and then carbamylating the alkyd polyol by heating the reaction mixture while feeding water in to the reaction mixture, preferably, in the presence of one or more c) carbamylation catalysts. The polycarbamate of the present invention when combined with a polyaldehyde or an acetal or hemiacetal thereof as a second component makes a multicomponent composition that is substantially isocyanate-free, and cures at a temperature of from 0° C. to less than 80° C. to form a crosslinked polyurethane.

    Abstract translation: 本发明提供了通过将a)流体形式的尿素加入到含有b)醇酸多元醇如短油或中油醇酸多元醇的反应介质中以形成反应混合物,然后通过以下方式氨基甲酰化醇酸树脂多元醇,制备聚氨酯的方法: 加热反应混合物同时将水送入反应混合物中,优选在一种或多种c)氨基甲酰化催化剂存在下进行。 当与多醛或其缩醛或半缩醛组合作为第二组分时,本发明的聚氨基甲酸酯形成基本上不含异氰酸酯的多组分组合物,并且在0℃至小于80℃的温度下固化。 以形成交联的聚氨酯。

Patent Agency Ranking