System and method for high bake repair coating over cured...

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 133/06 (2006.01) B05D 7/00 (2006.01) B05D 7/26 (2006.01) C09D 5/02 (2006.01) C09D 157/00 (2006.01) C09D 161/32 (2006.01)

Patent

CA 2446217

A basecoat composition includes an acrylic polymer prepared from a combination of monomers including at least about 30% by weight ethyl acrylate, methyl acrylate, methyl methacrylate, or a combination of these. The basecoat composition may also include a combination of methylated melamine resin and butylated melamine resin. An at least partially cured layer of the basecoat composition offers improved adhesion with a coating composition layer applied over it and cured, whether the coating composition layer applied over it is another layer of the basecoat composition itself or a layer of a clearcoat composition.

La présente invention concerne une composition de couche primaire qui comprend un polymère acrylique préparée à partir d'une combinaison de monomères comprenant au moins environ 30% en poids d'acrylate d'éthyle, d'acrylate de méthyle, de méthacrylate de méthyle ou d'une combinaison de ceux-ci. Cette composition de couche primaire peut aussi comprendre une combinaison de résine de mélamine méthylée et une résine de mélamine butylée. Une couche partiellement durcie au moins de cette composition de couche primaire présente une adhésion améliorée avec une couche de composition de revêtement appliquée sur celle-ci et durcie, que cette couche de composition de revêtement appliquée soit une autre couche de cette composition de couche primaire ou une couche de composition de vernis incolore.

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