Blocking and stain resistant surface treated articles and methods for making

摘要

The present invention provides surface treated articles comprising a recoatable surface treatment of an acrylic or vinyl polymer that does not change the appearance of the treated surface, and which imparts blocking resistance and/or stain and dirt pickup resistance to the treated surface. The one or more acrylic or vinyl polymer has a number average molecular weight of from 1,000 to 100,000, a glass transition temperature of −10° C. or higher, preferably, 30° C. or higher, and comprises the polymerization product of one or more non-ionic monomer, such as methyl methacrylate, with up to 47 wt. % of an ethylenically unsaturated acid monomer and, preferably, is non-migrating under use conditions. When dry, the surface treatments may form a layer of domains of polymer distributed all over the treated surface, rather than a film. Treated articles include coating or painted articles and elastomer films.

主权项

1. A surface treated article having a recoatable surface treatment that imparts stain an dirt pickup resistance to the treated surface and does not change the appearance of the treated surface comprising:
a painted or coated article or an elastomer film surface treated with a surface treatment of one or more dispersion or emulsion of an aqueous acrylic or vinyl polymer consisting essentially of the polymerization product of, (ii) 53 wt. % or more of one or more non-ionic acrylic and/or vinyl comonomer having a solubility in water of less than 5 g/100 g of water at 25 ° C., based on the total weight of polymerized monomers, and (i) an ethylenically unsaturated (poly)carboxylic acid monomer in the amount of from 0 to 47 wt. %, the polymer having a glass transition temperature (Tg) of −10° C. or higher, and a number average molecular weight (Mn) of from 1,000 to 100,000, wherein the article comprises the surface treatment in the amount of 0.003 to 2 g of dry polymer per square meter of treated area (g/m2) wherein the surface treatment, when dry, forms domains of polymer distributed all over the treated surface.