公开(公告)号：EP2454231A2

公开(公告)日：2012-05-23

申请号：EP10729876.2

申请日：2010-07-07

Applicant: BASF SE

Inventor： SCHELLING, Heiner ,  SPEIER, Jon, S. ,  STROEFER, Eckhard ,  KIM, Byoung-Yeon

IPC: C07C263/10 ,  C07C265/14

CPC classification number: C07C263/10 ,  C07C2601/14 ,  C07C265/14

Abstract: The present invention relates to a process for preparing light-coloured polyphenylene-polymethylene-polyisocyanate (PMDI), comprising the steps (a) providing carbon monoxide and chlorine, (b) reacting carbon monoxide with chlorine to form phosgene, (c) reacting the phosgene from step (b) with at least one primary amine with the exception of mono- and polyphenylene-polymethylene polyamines with an excess of phosgene to form an at least one isocyanate containing reaction solution, and hydrogen chloride, (d) separating excess phosgene from the isocyanate-containing reaction solution obtained in step (c), (e) providing at least one polyphenylene-polymethylene polyamine, and (f) reacting at least a portion of the phosgene separated in step (d) with the at least one polyphenylene-polymethylene polyamine to form the light-coloured polyphenylene-polymethylene polyisocyanate.

Abstract translation: 本发明涉及一种制备浅色聚亚苯基 - 多亚甲基多异氰酸酯（PMDI）的方法，包括步骤（a）提供一氧化碳和氯，（b）使一氧化碳与氯反应形成光气，（c）使 来自步骤（b）的光气与至少一种伯胺，除了具有过量光气的单和多亚苯基 - 多亚甲基多胺以形成至少一种含异氰酸酯的反应溶液和氯化氢，（d）将过量的光气从 使步骤（c）中获得的含异氰酸酯的反应溶液，（e）提供至少一种聚亚苯基 - 多亚甲基多胺，和（f）使步骤（d）中分离的光气的至少一部分与至少一种聚苯撑 - 聚亚甲基多胺形成浅色聚亚苯基多亚甲基多异氰酸酯。