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    Process for the preparation of polyisocyanates containing uretdione and isocyanurate groups, the polyisocyanates obtained by this process and their use in two-component polyurethane coatings
    2.
    发明授权
    Process for the preparation of polyisocyanates containing uretdione and isocyanurate groups, the polyisocyanates obtained by this process and their use in two-component polyurethane coatings 失效
    制备含有脲二酮和异氰脲酸酯基团的多异氰酸酯的方法，通过该方法获得的多异氰酸酯及其在双组分聚氨酯涂料中的用途

    公开(公告)号：US4994541A

    公开(公告)日：1991-02-19

    申请号：US455693

    申请日：1989-12-22

    申请人： Winfried Dell ,  Werner Kubitza ,  Dietrich Liebsch

    发明人： Winfried Dell ,  Werner Kubitza ,  Dietrich Liebsch

    IPC分类号： C07D251/34 ,  C07D229/00 ,  C08G18/02 ,  C08G18/79 ,  C09D175/00 ,  C09D175/04

    CPC分类号： C07D229/00 ,  C08G18/792 ,  C08G18/798

    摘要： The present invention is directed to a process for the preparation of modified polyisocyanates containing uretdione and isocyanurate groups by the oligomerization of a portion of the isocyanate groups of organic diisocyanates containing (cyclo)aliphatically-bound isocyanate groups in the presence of organic phosphines of catalysts followed by termination of the oligomerization reaction at the desired degree of oligomerization by the addition of a catalyst poison and removal, by distillation, of at least a portion of the excess, unreacted starting diisocyanate, characterized in that(a) about 0.1 to 10% of the isocyanate groups present in the starting diisocyanate are converted into urethane groups by the addition of at least one alcohol before and/or during the oligomerization reaction, and(b) the distillation residue obtained after removal of the excess starting diisocyanate is heated to temperatures of at least 50.degree. C. in the presence of 100 to 10,000 ppm, based on the weight of the distillation residue, of a peroxide.The present invention is also directed to the polyisocyanates containing uretdione and isocyanurate groups obtained by this process and their use, optionally in blocked form, as the isocyanate component in two-component polyurethane coatings.

    摘要翻译： 本发明涉及通过催化剂的有机膦存在下，通过在催化剂的有机膦存在下，通过部分异氰酸酯基团（有异氰酸酯基）异氰酸酯基团的异氰酸酯基团的低聚而制备含有脲二酮和异氰脲酸酯基团的改性多异氰酸酯的方法， 通过加入催化剂毒物以期望的低聚程度终止低聚反应，并通过蒸馏除去至少一部分过量的未反应的起始二异氰酸酯，其特征在于（a）约0.1至10％的 通过在低聚反应之前和/或期间加入至少一种醇将原料二异氰酸酯中存在的异氰酸酯基团转化为氨基甲酸酯基，和（b）将除去过量起始二异氰酸酯后得到的蒸馏残余物加热至 在100至10,000ppm的存在下，以t的重量计至少50℃ 他蒸馏残渣，过氧化物。 本发明还涉及含有通过该方法获得的脲二酮和异氰脲酸酯基团的多异氰酸酯，以及它们在任意为封闭形式中作为双组分聚氨酯涂料中的异氰酸酯组分的用途。

    Process for the production of phosgene with simultaneous generation of steam
    4.
    发明授权
    Process for the production of phosgene with simultaneous generation of steam 失效
    同时生产蒸汽的光气生产工艺

    公开(公告)号：US4764308A

    公开(公告)日：1988-08-16

    申请号：US103561

    申请日：1987-09-30

    申请人： Heinz Sauer ,  Helmut F. Porkert ,  Dietrich Liebsch

    发明人： Heinz Sauer ,  Helmut F. Porkert ,  Dietrich Liebsch

    IPC分类号： C01B32/80 ,  C07C51/58

    CPC分类号： C01B31/28

    摘要： Phosgene is produced by reacting chlorine and an excess of carbon monoxide in the presence of activated charcoal in a two stage process. In the first stage, the chlorine and carbon monoxide are reacted in a tubular reactor containing activated charcoal at a temperature above 250.degree. C. until 95 to 98% chlorine has reacted. The reaction gases are cooled to a temperature of from 50.degree. to 120.degree. C. and then introduced into a second reactor maintained at 50 to 100.degree. C. where the phosgene-forming reaction is completed. The phosgene leaving the second reactor has a residual chlorine content of less than 50 ppm. The heat generated during phosgene formation is used to produce steam.

    摘要翻译： 在两步法中，在活性炭存在下使氯和过量的一氧化碳反应生成光气。 在第一阶段，氯和一氧化碳在含有活性炭的管式反应器中在高于250℃的温度下反应，单位95-98％的氯已经反应。 将反应气体冷却至50℃至120℃的温度，然后导入保持在50至100℃的第二反应器中，其中光气形成反应完成。 离开第二反应器的光气的残留氯含量小于50ppm。 光气形成期间产生的热量用于生产蒸汽。