Base coat composition of a polyester modified polyester resin containing branched hydroxyl and its application in processes for the production of a multilayer painting system

摘要

PCT No. PCT/EP97/03661 Sec. 371 Date Jan. 25, 1999 Sec. 102(e) Date Jan. 25, 1999 PCT Filed Jul. 10, 1997 PCT Pub. No. WO98/03598 PCT Pub. Date Jan. 29, 1998The present invention relates to a coating composition comprising (A) at least one hydroxyl-containing component which [lacuna] of (A1) from 5 to 60% by weight of at least one polyester and (A2) from 40 to 95% by weight of at least one polyacrylate resin which has been prepared at least partially in the presence of component (A1) and (B) at least one crosslinking agent, characterized in that component (A2) is obtainable from the monomer units: (a) a cycloaliphatic ester of (meth)acrylic acid, (b) a hydroxyl-containing alkyl ester of (meth)acrylic acid, (c) a monomer which is different from (a) and (b) and has at least two polymerizable, olefinically unsaturated double bonds, (d) optionally a further hydroxyl-containing, ethylenically unsaturated monomer which is different from (a), (b) and (c), (e) an aliphatic ester of (meth)acrylic acid which is different from (a), (b), (c) and (d), (f) a vinyl-aromatic hydrocarbon which is different from (a), (b), (c), (d) and (e), and (g) a further ethylenically unsaturated monomer which is different from (a), (b), (c), (d), (e) and (f).