Coating composition containing acid functional acrylic...

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 133/08 (2006.01) C09D 133/00 (2006.01) C09D 133/02 (2006.01) C09D 133/06 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2508324

The present invention relates to a coating composition for coating various substrates, particularly automotive bodies. A crosslinkable component of the composition includes an acid functional acrylic copolymer polymerized from a monomer mixture comprising 2 percent to 12 percent of one or more carboxylic acid group containing monomers, percentages based on total weight of the acid functional acrylic copolymer, and 0.2 percent to 2 percent of amorphous silica, percentages based on total weight of the crosslinkable component. The crosslinking component can includes polyisocyanates, melamines, or a combination thereof.

La présente invention concerne une composition de revêtement destinée à déposer un revêtement sur divers substrats et notamment sur les carrosseries d'autos. Un composant réticulable de la composition comprend un copolymère acrylique fonctionnel acide polymérisé à partir d'un mélange de monomères contenant 2 à 12 % d'un ou de plusieurs monomères contenant un groupe acide, le pourcentage étant basé sur le poids total du copolymère acrylique fonctionnel acide, et 0,2 à 2 % de silice amorphe, le pourcentage étant basé sur le poids total du composant réticulable. Le composant réticulable peut comprendre des polyisocyanates, des mélamines ou une combinaison de ceux-ci.

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