Hydroxy-functional oligomers for high solids coatings

Details Hydroxy-functional oligomers for high solids coatings Hydroxy-functional oligomers for high solids coatings

C - Chemistry, Metallurgy

08

G

C08G 63/42 (2006.01) C08J 3/24 (2006.01) C08L 67/00 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2296389

A high solids coating composition comprising a branched hydroxy-functional polyester oligomer and a curing agent; and the oligomer itself containing at least 20 % by weight of the binder of at least one of tertiary acid ester end groups (I) and (II): where R1, R2 and R3 are independently selected from CH3 and CH2OH; the composition being suitable as an automobile clearcoat or pigmented topcoat.

On décrit une composition de revêtement à forte teneur en solides comprenant un oligomère de polyester à fonctionnalité hydroxy ramifié et un agent de polymérisation; l'oligomère lui-même contenant au moins 1 % de poids du liant d'au moins un des groupes terminaux esters d'acide tertiaire suivants: groupe (I) et groupe (II). Dans ces groupes R1, R2 et R3 sont indépendamment sélectionnés entre CH3 et CH2OH. Cette composition est appropriée pour être utilisée en tant que couche transparente ou en tant que couche de finition pigmentée pour des automobiles.

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