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1. 发明授权

US5905133A Process for the continuous production of thermoplastically processable polyurethanes having improved processing behavior 失效
标题翻译：连续生产具有改进的加工性能的热塑性可加工聚氨酯的方法
公开(公告)号：US5905133A
公开(公告)日：1999-05-18
申请号：US880464
申请日：1997-06-23
申请人： Friedemann Muller , Wolfgang Brauer , Herbert Heidingsfeld , Wolfgang Rohrig , Hans-Georg Hoppe , Jurgen Winkler
发明人： Friedemann Muller , Wolfgang Brauer , Herbert Heidingsfeld , Wolfgang Rohrig , Hans-Georg Hoppe , Jurgen Winkler
IPC分类号： C08G18/00 , C08G18/08 , C08G18/10 , C08G18/65
CPC分类号： C08G18/0895 , C08G18/10
摘要： The present invention relates to a process for the continuous production of thermoplastically processable polyurethanes having improved processing behaviour, wherein in a multistep reactionA) one or more linear hydroxyl-terminated polyols a) having a molecular weight of from 500 to 5000 are mixed continuously with a proportion of an organic diisocyanate b) in an NCO:OH ratio of from 2.0:1 to 5.0:1, in a mixing unit at high shear energy,B) the mixture prepared in step A) is reacted continuously to form an isocyanate-terminated prepolymer in a reactor at temperatures of >120.degree. C., until a conversion of >90%, referred to component a), is achieved,C) the prepolymer prepared in step B) is mixed with the remainder of component b), an NCO:OH ratio of from 2.05:1 to 6:1 being established overall in steps A) to C) and an NCO:OH ratio of 0.9 to 1.1 being established when all the components of steps A) to F) are included,D) the mixture prepared in step C) is cooled to a temperature of
摘要翻译：本发明涉及连续生产具有改进的加工性能的热塑性加工性聚氨酯的方法，其中在多步反应中A）一种或多种分子量为500-5000的直链羟基封端的多元醇a）与一种有机二异氰酸酯b）的比例为2.0:1至5.0:1的NCO:HOH比率，B）在步骤A）中制备的混合物连续反应形成异氰酸酯 - 在约120℃的温度下在反应器中终止预聚物，直至达到> 90％的转化率，称为组分a），C）将步骤B）中制备的预聚物与组分b）的剩余部分混合，在步骤A）至C）中总体确定为2.05:1至6:1的NCO:HOH比，并且当包括步骤A）至F的所有组分时，建立了0.9至1.1的NCO:OH比率） D）将步骤C）中制备的混合物冷却至<190℃ E）将步骤D）中得到的混合物与一种或多种二醇和任选的分子量为60-500的三醇和/或二胺扩链剂c）连续强烈混合最多5秒， F）步骤E）中获得的混合物在与步骤B）中使用的反应器不同的反应器中连续反应以形成热塑性聚氨酯。

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