公开(公告)号：US20200223787A1

公开(公告)日：2020-07-16

申请号：US16648366

申请日：2018-09-14

申请人： Covestro Deutschland AG

发明人： Dorota Greszta-Franz ,  Christian Drumm ,  Jan Morbach ,  Reiner Witkowski

IPC分类号： C07C227/40 ,  C07C229/24

摘要： The present invention relates to a method for purifying polyaspartic acid ester compositions and to the provision of polyaspartic acid ester compositions that contain 0.01 to

公开(公告)号：US10968165B2

公开(公告)日：2021-04-06

申请号：US16648366

申请日：2018-09-14

申请人： Covestro Deutschland AG

发明人： Dorota Greszta-Franz ,  Christian Drumm ,  Jan Morbach ,  Reiner Witkowski

IPC分类号： C07C227/40 ,  C07C229/24 ,  C07C227/06

摘要： The present invention relates to a method for purifying polyaspartic acid ester compositions and to the provision of polyaspartic acid ester compositions that contain 0.01 to

公开(公告)号：US10752727B1

公开(公告)日：2020-08-25

申请号：US15743342

申请日：2016-07-07

申请人： Covestro Deutschland AG

发明人： Hans Georg Grablowitz ,  Alexander Pross ,  Reiner Witkowski ,  Holger Breuer ,  Sven Gestermann ,  Christian Joachim Hahn ,  Stephan Schubert ,  Joachim Ritter

IPC分类号： C08G18/42 ,  C08G18/08 ,  C08G18/75 ,  C08G18/44 ,  C08G18/73

摘要： The application relates to a process for continuously producing aqueous polyurethane dispersions, which is characterized by the use of micro structured mixing elements and addition of water twice during the dispersion step. The energy input in the mixing of the dispersion is low. In addition, the application describes an apparatus suitable for execution of the aforementioned process.