公开(公告)号：WO2022207135A1

公开(公告)日：2022-10-06

申请号：PCT/EP2021/086881

申请日：2021-12-20

申请人： AKZO NOBEL COATINGS INTERNATIONAL B.V.

发明人： ENGELEN VAN, Antonius Hendrikus Gerardus ,  JONGKIND, Lukas Jurriaan

IPC分类号： C09D175/00 ,  C09D133/02 ,  C09D167/00 ,  C08G73/00 ,  C09D201/08 ,  C09D179/00

摘要： The invention relates to a two-component aqueous coating composition comprising: A an aqueous resin component comprising a carboxyl-functional resin; and B a substantially water-free hardener component comprising: - a carbodiimide comprising in the range of from 1 to 20 carbodiimide moieties and terminal and/or pendant non-ionic emulsifying groups; and - an alkoxysilane selected from the groups consisting of an organo-functional alkoxysilane of general formula (I) R1[-(CH2)n-Si(OR2)3-m(R3)m]p (I) and a tetraalkylorthosilicate of general formula (II) Si(OR2)4 (II) wherein m is 0 or 1; n is an integer with a value in the range of from 0 to 6; p is 1 or 2; R1 is an organic group comprising an epoxide group, a vinyl group, or a (meth)acryloyl group, or is a hydrogen atom and R1 does not comprise a carboxylic functional group, a mercapto-functional group, or an amine- functional group; R2 is an alkyl group having 1 to 4 carbon atoms; and R3 is an alkyl group having 1 to 4 carbon atoms, wherein the weight ratio of the carbodiimide to the alkoxysilane in hardener component B is in the range of from 10:90 to 85:15.