公开(公告)号：US06664415B2

公开(公告)日：2003-12-16

申请号：US09845873

申请日：2001-04-30

申请人： Martin Brahm ,  Lutz Schmalstieg ,  Ulrich Geron ,  Hans-Günter Behr ,  Jörg Morawski

发明人： Martin Brahm ,  Lutz Schmalstieg ,  Ulrich Geron ,  Hans-Günter Behr ,  Jörg Morawski

IPC分类号： C07C26300

CPC分类号： C07C263/16 ,  C07C265/04

摘要： The present invention relates to a process for preparing a low boiling monoisocyanate having a boiling point of between 70 and 320° C. at standard pressure by reacting A) a high boiling isocyanate compound having a boiling point of at least 180° C. at standard pressure and an HC content of at least 50 ppm with B) a monoamine having a primary amino group, at a maximum reaction temperature of 180° C. and a molar ratio of isocyanate groups to amino groups of at least 4:1 to form a compound containing a biuret/urea group, simultaneously thermally decomposing this compound in situ to form a monoisocyanate corresponding to monoamine B) and removing the monoisocyanate by distillation, optionally under vacuum.

摘要翻译： 本发明涉及一种在标准压力下制备沸点在70和320℃之间的低沸点单异氰酸酯的方法，该方法是使标准压力下的沸点为至少180℃的高沸点异氰酸酯化合物 并且具有至少50ppm的HC含量与B）具有伯氨基的单胺，最大反应温度为180℃，异氰酸酯基与氨基的摩尔比为至少4:1以形成含有 一个缩二脲/尿素基团，同时热分解该化合物原位形成对应于单胺B的单异氰酸酯），并任选地在真空下通过蒸馏除去单异氰酸酯。