PROCESS FOR THE PRODUCTION OF A MULTI-LAYERED COATING, AQUEOUS COATING COMPOSITIONS, WATER-DILUTABLE POLYACRYLATE RESINS AND PROCESS FOR THE PREPARATION OF WATER-DILUTABLE POLYACRYLATE RESINS

摘要

AbstractThe invention relates to a process for theproduction of a multi-layered coating in which theaqueous top coating composition contains a water-dilutable polyacrylate resin which has a hydroxyl numberof 40 to 200, an acid number of 20 to 100 and a glasstransition temperature (TG) Of -40°C to +60°C and can beprepared by adding a mixture (I) of a (meth)acrylic acidester and a copolymerizable monomer containing hydroxylgroups to an organic solvent, subjecting the mixture tofree radical polymerization and, when the addition ofmixture (I) has ended, adding a monomer containingcarboxyl groups and polymerizing the mixture further.