公开(公告)号：US20220098437A1

公开(公告)日：2022-03-31

申请号：US17426767

申请日：2020-02-20

申请人： Covestro Intellectual Property GmbH & Co. KG ,  COVESTRO DEUTSCHLAND AG

发明人： Dorota Greszta-Franz ,  Jan Weikard ,  Holger Mundstock

IPC分类号： C09D175/12 ,  C09D7/63 ,  C08G18/79 ,  C08G18/73 ,  C08G18/38

摘要： The present invention relates to two-component clear-coat systems comprising polyaspartic esters having primary amino groups and small amounts of dialkyl fumarates, to a process for the production thereof, and to the use thereof in the production of coatings for vehicle repair applications and to substrates coated therewith.

公开(公告)号：US11608406B2

公开(公告)日：2023-03-21

申请号：US16976118

申请日：2019-02-25

申请人： COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG

发明人： Jan Weikard ,  Holger Mundstock ,  Dagmar Huertgen ,  Goenuel-Hava Yelkaya ,  Marc Schreiber

IPC分类号： C08G18/50 ,  B01J8/00 ,  C08G18/22 ,  C08G18/24 ,  C08G18/62 ,  C08G18/79

摘要： A process for preparing a polyurethane polymer comprises the step of: I) mixing a first component (100) comprising a polyisocyanate with a second reactant component (200) comprising a compound having Zerewitinoff-active hydrogen atoms in a mixing vessel (300) to obtain a reaction mixture (400), wherein the first reactant component (100) and/or the second reactant component (200) are contacted with a catalyst bed (500) before they are mixed in the mixing vessel (300) and/or the reaction mixture (400) is contacted with a catalyst bed (500), wherein the catalyst bed (500) contains a catalyst reversibly sorbed on a substrate, the catalyst catalyses the reaction of isocyanate groups with themselves or with Zerewitinoff-active compounds and the catalyst is released into the first component (100), second component (200) or reaction mixture (400) that is in contact with the catalyst bed (500), such that a reaction mixture (410) containing the catalyst is obtained.