Process for producing a multi-layer coating

Details Process for producing a multi-layer coating Process for producing a multi-layer coating

C - Chemistry, Metallurgy

09

D

C09D 133/04 (2006.01) B05D 7/16 (2006.01) B05D 7/26 (2006.01) C08F 265/04 (2006.01) C09D 151/00 (2006.01) C09D 161/20 (2006.01)

Patent

CA 2076676

Abstract The invention relates to a process for the production of a multicoat coating in which the aqueous topcoat composition contains a water-thinnable poly- acrylate resin which has a hydroxyl value of 40 to 200, an acid value of 20 to 100 and a glass transition tem- perature (TG) of -40°C to +60°C, and can be prepared by adding a mixture (I) of a (meth)acrylic acid ester, a copolymerizable hydroxyl-containing monomer and, if appropriate, a further ethylenically unsaturated monomer to an organic solvent and carrying out free-radical polymerization and adding, at the end of the addition of the mixture (I), a mixture of a monomer containing carboxyl groups and a monomer free from carboxyl groups and continuing the polymerization.

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