Process for the preparation of polyisocyanates containing urethane and
biuret groups
    42.
    发明授权
    Process for the preparation of polyisocyanates containing urethane and biuret groups 失效
    制备含氨基甲酸酯和缩二脲基团的多异氰酸酯的方法

    公开(公告)号:US4124569A

    公开(公告)日:1978-11-07

    申请号:US832318

    申请日:1977-09-12

    摘要: The present invention is concerned with a process for producing biuret polyisocyanates and the polyisocyanates so produced. These isocyanates are produced by the reaction of at least about a four fold molar excess of a diisocyanate having aliphatically bound isocyanate groups with amino alcohols having a particular structure at a temperature between about 90 and 200.degree. C. The amino alcohols contain at least three carbon atoms, have their hydroxyl and amino groups separated by at least two carbon atoms, and may contain urea, urethane, ether or amino bonds. The present invention is also concerned with a process for producing two component and one component moisture curing lacquers using the biuret polyisocyanates of the present invention and the lacquers so produced.

    摘要翻译: 本发明涉及制备缩二脲多异氰酸酯的方法和如此制备的多异氰酸酯。 这些异氰酸酯是通过至少约四倍摩尔过量的具有脂肪族结合的异氰酸酯基团的二异氰酸酯与具有特定结构的氨基醇在约90-200℃之间的温度下进行的反应来制备的。氨基醇含有至少三个碳 原子,其羟基和氨基被至少两个碳原子分开,并且可以含有脲,氨基甲酸酯,醚或氨基键。 本发明还涉及使用本发明的缩二脲多异氰酸酯和如此制备的漆制备两组分和一种组分的湿固化漆的方法。