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公开(公告)号：US08546605B2
公开(公告)日：2013-10-01
申请号：US12065680
申请日：2006-09-05
IPC分类号： C07C291/00
CPC分类号： C07C263/04 , C07C269/04 , C07C271/12 , C07C265/14
摘要： The invention provides a multistage process for continuously preparing organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to low molecular mass monomeric polyurethanes, and thermally cleaving said polyurethanes, in which at defined reaction stages the polyisocyanates prepared and unusable residues are separated off, and reusable by products and intermediates are recycled to upstream stages.
摘要翻译： 本发明提供了一种多级方法，其通过使相应的有机多胺与碳酸衍生物和醇反应到低分子量单体聚氨酯，以及热裂解所述聚氨酯，连续制备有机，可蒸馏的多异氰酸酯，优选二异氰酸酯，更优选为脂族或脂环族二异氰酸酯， 其在确定的反应阶段中制备的多异氰酸酯和不可用的残余物被分离出来，并且可通过产物和中间体再利用再循环到上游阶段。
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公开(公告)号：US20080249332A1
公开(公告)日：2008-10-09
申请号：US12065680
申请日：2006-09-05
IPC分类号： C07C263/00
CPC分类号： C07C263/04 , C07C269/04 , C07C271/12 , C07C265/14
摘要： The invention provides a multistage process for continuously preparing organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to low molecular mass monomeric polyurethanes, and thermally cleaving said polyurethanes, in which at defined reaction stages the polyisocyanates prepared and unusable residues are separated off, and reusable by products and intermediates are recycled to upstream stages.
摘要翻译： 本发明提供了一种多级方法，其通过使相应的有机多胺与碳酸衍生物和醇反应到低分子量单体聚氨酯，以及热裂解所述聚氨酯，连续制备有机，可蒸馏的多异氰酸酯，优选二异氰酸酯，更优选为脂族或脂环族二异氰酸酯， 其在确定的反应阶段中制备的多异氰酸酯和不可用的残余物被分离出来，并且可通过产物和中间体再利用再循环到上游阶段。
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