Coating agent based on a branched hydroxyl group-containing...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 167/00 (2006.01) C08G 18/40 (2006.01) C08G 18/63 (2006.01) C09D 133/04 (2006.01) C09D 151/08 (2006.01)

Patent

CA 2258510

The invention concerns a coating agent containing: (A) at least one hydroxyl group-containing component comprising: (A1) between 5 and 60 wt.% of at least one polyester; and (A2) between 40 and 95 wt.% of at least one polyacrylate resin produced at least partially in the presence of component (A1); and (B) at least one cross-linking agent. The coating agent is characterized in that component (A2) is obtained from the following monomer units: (a) a cycloaliphatic ester of (meth)acrylic acid; (b) a hydroxyl group-containing alkylester of (meth)acrylic acid; (c) a monomer which is different from (a) and (b) and has at least two polymerizable olefinically unsaturated double bonds; (d) optionally a further hydroxyl group-containing ethylenically unsaturated monomer which is different from (a), (b) and (c); (e) an aliphatic ester of (meth)acrylic acid which is different from (a), (b), (c) and (d); (f) a vinylaromatic hydrocarbon which is different from (a), (b), (c), (d) and (e); and (g) a further ethylenically unsaturated monomer which is different from (a), (b), (c), (d), (e) and (f).

L'invention concerne un agent de revêtement contenant (A) au moins un constituant contenant des groupes hydroxyle, ledit constituant comprenant (A1) entre 5 et 60 % en poids d'au moins un polyester et (A2) entre 40 et 95 % en poids d'au moins une résine polyacrylate obtenue au moins en partie en présence du constituant (A1) et (b) au moins un agent de réticulation. Cet agent de revêtement se caractérise en ce que le constituant (A2) s'obtient à partir des unités monomères suivantes: (a) un ester cycloaliphatique de l'acide (méth)acrylique, (b) un ester d'alkyle de l'acide (méth)acrylique, contenant des groupes hydroxyle, (c) un monomère différent de (a) et de (b) comportant au moins deux liaisons doubles polymérisables insaturées par oléfine, (d) éventuellement un autre monomère différent de (a), de (b) et de (c), contenant des groupes hydroxyle, insaturé par oléfine, (e) un ester aliphatique de l'acide (méth)acrylique, différent de (a), de (b) et de (c), (f) un hydrocarbure vinylaromatique différent de (a), de (b), de (c), de (d) et de (e) et (g) un autre monomère insaturé par oléfine, différent de (a), de (b), de (c), de (d), de (e) et de (f).

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