Aqueous dispersion of polymer

Details Aqueous dispersion of polymer Aqueous dispersion of polymer

C - Chemistry, Metallurgy

08

F

400/1, 400/5917

C08F 2/16 (2006.01) C08F 220/34 (2006.01) C08F 246/00 (2006.01)

Patent

CA 1122339

ABSTRACT AQUEOUS DISPERSION OF POLYMER This invention relates to aqueous dispersions of synthetic polymer particles, particularly those used as film-forming media in surface coating compositions. The problem of maintaining under moist conditions the adhesion to a substrate of a film formed from a surface coating composition having such an aqueous dispersion as a film former can be substantially overcome by using a dispersion wherein the film-forming polymer comprises (a) polar groups selected from amine, ureido and thioureido groups (b) a proportion of monomer units derived from acrylamide and meth- acrylamide, and (c) a proportion of poly(alkylene oxide). The proportions of these components present by weight of the film-forming polymer are at least 0.3% of (a), at least 0.3% of (b), at least 0.5% of (c) and from 1.4 - 9.0%/ of (a) + (b) + (c). These aqueous polymer dispersions may be used in interior or exterior surface coatings.

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