C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) C08G 18/40 (2006.01) C08G 18/62 (2006.01) C09D 151/08 (2006.01) C09D 167/00 (2006.01)
Patent
CA 2252816
The present invention relates to a coating composition consisting of at least three components (I), (II) and (III), component (I) containing as binder (A) at least one acrylate copolymer (A1) which is dispersed or dissolved in organic, optionally water-dilutable solvent and/or one polyester resin (A2) which is dispersed or dissolved in organic, optionally water-dilutable solvent and/or one polyurethane resin (A3) which is dispersed or dissolved in organic, optionally water-dilutable solvent, and/or optionally a further binder (A4), component (II) contains at least one nonblocked polyisocyanate as crosslinking agent, and component (III) contains as constituent essential to the invention an aqueous dispersion, prepared in a single- or multistage method, of a hydrophilicized polymer resin HP based on a hydrophobic polymer resin HP' and also, if desired, contains components (A1) and/or (A2) and/or (A3) and/or (A4) in aqueous dispersion. Also described is the use of the novel coating compositions for the finishing of automobile bodies and plastics parts and for automotive refinishing.
L'invention a pour objet un agent de revêtement renfermant au moins trois composants (I, II, et III). Le composant (I) renferme comme liant (A) au moins un copolymère acrylate (A1) dissous ou dispersé dans un solvant organique éventuellement diluable à l'eau et/ou une résine polyester (A2) dissoute ou dispersée dans un solvant organique éventuellement diluable à l'eau, et/ou, le cas échéant, un autre liant (A4). Le composant (II) renferme, comme agent réticulant, au moins un polyisocyanate non bloqué et, le composant (III) renferme, en tant que constituant essentiel de l'invention, une dispersion aqueuse, obtenue suivant un procédé en une ou plusieurs étapes, d'une résine polymère HP hydrophilisée, à base d'une résine polymère HP' hydrophobe ainsi que, le cas échéant, les composants (A1) et/ou (A2) et/ou (A3) et/ou (A4) en dispersion aqueuse. En outre, l'invention concerne l'utilisation de l'agent de revêtement précité pour la peinture de carrosseries automobiles et de pièces en matière plastique, ainsi que pour des travaux de peinture en réparation automobile.
Grandhee Sunitha
Lettmann Bernhard
Mayer Bernd
Nienhaus Egbert
Rink Heinz-Peter
Basf Coatings Aktiengesellschaft
Fetherstonhaugh & Co.
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