公开(公告)号：US20230143725A1

公开(公告)日：2023-05-11

申请号：US17915568

申请日：2021-03-17

Applicant: BASF COATINGS GMBH

Inventor： Anna KONDRAT ,  Egbert NIENHAUS ,  Joerg RESSEL ,  Karin WEVER ,  Silke PRZYBILLA ,  Tim VOEGELING ,  Sibylle SCHOEPS

IPC: C09D163/00 ,  C09D5/00 ,  C08G59/50 ,  C08G59/56 ,  C08G59/24 ,  C08K5/09 ,  B05D5/00 ,  B05D7/14

CPC classification number: C09D163/00 ,  C09D5/002 ,  C08G59/5026 ,  C08G59/5033 ,  C08G59/56 ,  C08G59/245 ,  C08K5/09 ,  B05D5/005 ,  B05D7/14

Abstract: Disclosed herein is an aqueous coating composition containing an aqueous epoxy resin dispersion, an aqueous amine-functional resin dispersion and an aromatic carboxylic acid. The aqueous dispersion contains at least one specific di- and/or polyfunctional monomeric amine and at least one resin component including at least one specific polyfunctional organic amine. Further disclosed herein is a kit-of-parts including a base varnish containing the aqueous epoxy resin dispersion and a curing component containing the aqueous amine-functional resin dispersion as well as the aromatic carboxylic acid. Additionally disclosed herein is a process for producing a coating on the substrate as well as coated substrates resulting from said process. Cured coating layers formed from said compositions exhibit a good adhesion to the substrate as well as a high intercoat adhesion and blistering stability under humidity conditions without negatively influencing the excellent sandability and the good stone chipping properties.