Coating compositions having increased block resistance

Details Coating compositions having increased block resistance Coating compositions having increased block resistance

C - Chemistry, Metallurgy

09

D

C09D 133/06 (2006.01) C09D 131/04 (2006.01)

Patent

CA 2730176

The aqueous volatile organic compound (VOC)-free coating compositions includes an acrylic latex and a vinyl acetate-ethylene latex including from 10 to 90 weight percent of a vinyl acetate-ethylene polymer, based on total weight of acrylic polymer and vinyl acetate-ethylene polymer, having a T g from -20 to 20 degrees Celsius; and from about 10 to about 90 weight percent of an acrylic polymer, based on the total weight of acrylic polymer and vinyl acetate-ethylene polymer, the acrylic polymer comprising, in polymerized form, at least one ethylenically unsaturated (meth)acrylic monomer and from 0,01 to 10 weight percent, based on total weight of the acrylic polymer, of an acetoacetate moiety containing monomer, where the acrylic polymer has a T g of from -20 to 20 degrees Celsius. A method of coating a substrate and substrate having at least one surface coated are disclosed.

Les compositions aqueuses de revêtement exemptes de composés organiques volatils (VOC) comprennent un latex acrylique et un latex d'acétate de vinyle-éthylène comprenant de 10 à 90 pour cent en poids d'un polymère acétate de vinyle-éthylène, sur la base du poids total du polymère acrylique et du polymère acétate de vinyle-éthylène, ayant une Tg de -20 à 20 degrés Celsius ; et d'environ 10 à environ 90 pour cent en poids d'un polymère acrylique, sur la base du poids total du polymère acrylique et du polymère acétate de vinyle-éthylène, le polymère acrylique comprenant, sous une forme polymérisée, au moins un monomère (méth)acrylique à insaturation éthylénique et de 0,01 à 10 pour cent en poids, sur la base du poids total du polymère acrylique, d'un monomère contenant une fraction acétoacétate, le polymère acrylique ayant une Tg de -20 à 20 degrés Celsius. L'invention porte également sur un procédé de revêtement d'un substrat et sur un substrat ayant au moins une surface revêtue.

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