Coating composition and method for application thereof

Details Coating composition and method for application thereof Coating composition and method for application thereof

C - Chemistry, Metallurgy

09

D

C09D 5/00 (2006.01) B05D 1/36 (2006.01) C08G 59/24 (2006.01) C08L 63/02 (2006.01) C09D 133/06 (2006.01) C09D 133/14 (2006.01) C09D 157/08 (2006.01) C09D 163/00 (2006.01) C09D 201/02 (2006.01) C08L 27/12 (2006.01) C08L 33/06 (2006.01) C08L 33/16 (2006.01) C08L 63/00 (2006.01)

Patent

CA 2223392

The present invention provides a thermosetting organic solvent type coating capable of forming a cured coating film having a TUKON hardness at 20°C of 15 or more and the minimum value of dynamic modulus E' at a frequency of 110 Hz in the temperature range of 150-200°C, of 1x10 9 dyn/cm 2 or more. The cured film formed from the coating, as compared with the cured films formed from conventional organic solvent type coatings used as a top coat for automobile (e.g. an organic solvent type coating containing, as main components, a hydroxyl group-containing acrylic resin and a melamine resin, or a carboxylic-epoxy type coating), is at least equivalent in weatherability, finish appearance, acid resistance, etc. and superior in stain resistance.

L'invention porte sur un revêtement de type solvant organique thermodurcissable, pouvant former une pellicule de revêtement réticulée, possédant une dureté TUKON de 15 ou plus à 20 degrés C, et un module dynamique E' minimal de 1x10 9 dynes/cm 2 ou plus à une fréquence de 110 Hz dans une plage de 150-200 degrés C. Comparativement aux pellicules réticulées formées à partir de revêtements classiques de type solvant organique, utilisés comme couche de finition sur les autos (p. ex. les revêtements de type solvant organique, contenant comme principaux constituants une résine acrylique hydroxylée et une résine de mélamine, ou un revêtement de type époxy-carboxylique), la pellicule réticulée formée à partir du revêtement de l'invention est au moins équivalente en ce qui concerne l'apparence du fini ainsi que la résistance aux intempéries et aux acides, et supérieure quant à la résistance aux taches.

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