Ambient cure fast dry solvent borne coating compositions

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 163/00 (2006.01) C08F 8/32 (2006.01) C08G 59/16 (2006.01) C08G 59/40 (2006.01) C08G 59/50 (2006.01)

Patent

CA 2433001

The present invention is directed to fast dry ambient temperature curable coating compositions especially suited for use in automotive refinish applications. A binder component of the two pack coating composition includes an epoxy resin having at least one acetoacetate functionality and at least one epoxy group, and one or more reactive components provided with at least two acetoacetate functionalities. Some of the suitable reactive components include structured reactive diluent, an acrylic polymer, a polyester, or a combination thereof. A crosslinking component of the coating composition includes polyamine, a blocked polyamine or a mixture thereof. The present invention is further directed to a method of producing a coating on a substrate from the coating composition.

L'invention concerne des compositions de revêtement à séchage rapide capables de durcir à température ambiante, qui conviennent particulièrement bien dans des applications de réfection de peinture d'automobiles. Un constituant de liant de cette composition de revêtement à deux composants comprend une résine époxyde comportant au moins une fonctionnalité acétoacétate et un moins un groupe époxyde, et un ou plusieurs constituants réactifs comportant au moins deux fonctionnalités acétoacétate. Certains des constituants réactifs renferment un diluant réactif structuré, un polymère acrylique, un polyester ou une combinaison de ceux-ci. Un constituant de réticulation de la composition de revêtement comprend une polyamine, une polyamine séquencée ou un mélange de celles-ci. L'invention concerne de plus un procédé permettant de produire un revêtement sur un substrat à partir de cette composition de revêtement.

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