Branched polymers and coating compositions made therefrom

Details Branched polymers and coating compositions made therefrom Branched polymers and coating compositions made therefrom

C - Chemistry, Metallurgy

08

F

C08F 120/06 (2006.01) C08F 4/04 (2006.01) C08F 4/28 (2006.01)

Patent

CA 2538274

This invention relates to rapid curing coating compositions that are particularly useful for automotive OEM and refinish applications. The coating composition includes a crosslinkable component that contains a novel highly branched acrylic polymer, and a crosslinking component that contains conventional crosslinking agents, such as polyisocyanate and melamine. This invention is also directed to a process for producing coatings from the rapid curing coating compositions. These compositions are especially useful in providing hard highly crosslinked coatings.

La présente invention concerne des compositions de revêtement à durcissement rapide qui sont particulièrement utiles pour des applications de fabrication d'équipement d'origine et de carrosserie automobile. La composition de revêtement comprend un constituant réticulable contenant un nouveau polymère acrylique hautement ramifié, ainsi qu'un constituant de réticulation contenant des agents de réticulation classiques, tels que du polyisocyanate et de la mélamine. La présente invention concerne également un procédé de production de revêtements à partir des compositions de revêtement à durcissement rapide. Lesdites compositions sont particulièrement utiles pour obtenir des revêtements durs hautement réticulés.

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