公开(公告)号：US20220372326A1

公开(公告)日：2022-11-24

申请号：US17623504

申请日：2020-06-22

申请人： BASF Coatings GmbH

发明人： Yang Zhang ,  Ji Ming Wang ,  Lei He ,  Christian Gerhard Schaefer ,  Wen Mei Liu ,  Ranjit Salvi ,  Stefan Hirsemann

IPC分类号： C09D167/00 ,  C07F7/18 ,  C07F7/08 ,  C09D133/14 ,  C09D7/65 ,  C09D7/63

摘要： Described herein is a 2K clearcoat composition including, Component I including a). at least one resin having carboxylic acid groups with acid value of 50 to 400 mg KOH/g; b). at least one resin having hydroxyl functional groups with a hydroxyl value of 10 to 800 mg KOH/g; c). at least one catalyst; and d). at least one solvent, and Component II including e). at least one epoxy-functional alkoxysilane and/or its oligomer and/or its polymer; and f). at least one crosslinker reactive to hydroxyl groups. Also described herein are a substrate coated with the dried and cured 2K clearcoat composition and an automotive including the substrate.

公开(公告)号：US20220251410A1

公开(公告)日：2022-08-11

申请号：US17623796

申请日：2020-06-22

申请人： BASF Coatings GmbH

发明人： Ming Wang ,  Chun Yang Li ,  Yuan Yuan Song ,  Ling Yu Sui ,  Stefan Hirsemann ,  Cathrin Corten

IPC分类号： C09D133/06

摘要： Described herein is a coating composition including a) from 25 to 50% by weight of a polymeric binder selected from polyacrylates (A1) and/or polyesters (A2) with a crosslinkable amount of hydroxyl groups, as component (A), b) from 15 to 25% by weight of a crosslinking agent having functional groups that are reactive to OH groups, as component (B), and c) from 35 to 50% by weight of at least one monomeric and/or oligomeric reactive diluent with at least one olefinic double bond, as component (C), where the weight percentage is based on the total weight of the coating composition. This coating composition has not only low VOC but also high hardness after curing. Also described herein are a preparation method of the coating composition and a method of use thereof.