公开(公告)号：US20090286950A1

公开(公告)日：2009-11-19

申请号：US12436279

申请日：2009-05-06

申请人： Uwe SCHUMANN ,  Kirstin WEILAND ,  Sven HANSEN ,  Esther VON POSSEL

发明人： Uwe SCHUMANN ,  Kirstin WEILAND ,  Sven HANSEN ,  Esther VON POSSEL

IPC分类号： C08G18/72 ,  B29C47/80 ,  D01F1/02

CPC分类号： C08G18/0895 ,  C08G18/12 ,  C08G18/283 ,  C08G18/4812 ,  C08G18/6674 ,  C08G18/755 ,  C08G18/792 ,  C08G2170/20 ,  Y10T428/31551

摘要： Process for producing a chemically crosslinked polyurethane film, comprising the following substeps: A) chemically reacting a mixture comprising two or more polyols with one or more polyisocyanates, at least one of the polyols or at least one of the polyisocyanates comprising molecules having a functionality of three or more, and the ratio of the total number of isocyanate groups to the total number of hydroxyl groups being less than 1.0, to give a hydroxyl-functionalized, meltable reaction product, referred to below as hydroxyl-functionalized polyurethane hotmelt prepolymer, B) introducing the polyurethane hotmelt prepolymer and one or more polyisocyanates into a continuously operating mixing assembly wherein a chemical reaction takes place of the hydroxyl-functionalized polyurethane hotmelt prepolymer in the melt with the polyisocyanates, C) coating the melt emerging from the mixing assembly onto an incoming web-form material or between two incoming web-form materials, in the course of which the reaction started in substep B) continues.

摘要翻译： 制备化学交联的聚氨酯膜的方法，包括以下子步骤：A）将包含两种或更多种多元醇的混合物与一种或多种多异氰酸酯，至少一种多元醇或至少一种多异氰酸酯化学反应，所述多异氰酸酯包含具有 三个以上，异氰酸酯基总数与羟基总数的比例小于1.0，得到羟基官能化的可熔化反应产物，以下称为羟基官能化聚氨酯热熔预聚物，B） 将聚氨酯热熔预聚物和一种或多种多异氰酸酯引入连续操作的混合组合中，其中化学反应发生在与多异氰酸酯的熔体中的羟基官能化的聚氨酯热熔体预聚物，C）将从混合组件出来的熔体 网状材料或两种进入的网状材料之间 其中反应在步骤B）开始反应继续。