Low voc coatings and paints

Details Low voc coatings and paints Low voc coatings and paints

C - Chemistry, Metallurgy

09

D

C09D 133/06 (2006.01)

Patent

CA 2576224

Coating compositions are provided which may be applied from aqueous systems and contain binders which are autoxidisable to produce rapid drying hard coatings, preferred binders are based on polymers derived from monomers obtained by the reaction of drying oil fatty acids and unsaturated monomers. The polymers contain microgels, have low Tg and contain residual unsaturation; preferred copolymers also contain amide groups. The drying of the coating compositions can be accelerated by the use of metal dryers and have been found to enable the use of particularly low levels of vanadium dryers.

L'invention concerne des compositions de revêtement qui peuvent être appliquées à partir de systèmes aqueux et qui contiennent des liants auto-oxydables, donnant des revêtements durs à séchage rapide. Les liants préférés sont à base de polymères dérivés de monomères issus de la réaction entre des acides gras d'huiles siccatives et des monomères non saturés. Les polymères renferment des microgels, ils ont un faible Tg et présentent une insaturation résiduelle. Les copolymères préférés renferment en outre des groupes amide. Le séchage des compositions de revêtement peut être accéléré par des siccatifs métalliques, et on a constaté que l'opération de séchage était possible avec des siccatifs à faible teneur en vanadium.

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