Abstract: Aqueous acrylic polymer emulsions containing as a first polymeric component a core-shell polymer having a core formed from one or more monomers selected from styrene, vinyl acetate, vinyl toluene and acrylic or methacrylic acid esters of alcohols of 1 to 4 carbon atoms and a shell formed of the above monomers in conjunction with one or more monomers selected from acrylic acid or methacrylic acid esters of alcohols of 1 to 8 carbon atoms and a minor amount of acrylic or methacrylic acid and as a second polymeric component a polymer composed of a major amount of one or more monomers selected from styrene, vinyl acetate, vinyl toluene and acrylic or methacrylic acid esters of alcohols of 1 to 4 carbon atoms and a minor portion of one or more acrylic acid esters of alcohols of 1 to 8 carbon atoms with acrylic and/or methacrylic acid.

Abstract: Aqueous slurries of vesiculated cross-linked polyester resin granules which show a shrinkage of less than 5% on drying are prepared by a double-emulsion process in the presence of polyamine having a pKa value of 8.5-10.5 at a concentration of 0.3 to 1.4 amine groups per carboxyl group of the polyester, the acid value of which is limited to 10-45 mgm KOH per gm.The granules are of particular use as opacifying matting agents in latex paints and avoid the defect observed hitherto of cracking at high film builds.

Abstract: A process for preparing a film-forming material by reacting at least two .alpha., .beta.-ethylenically unsaturated monomers one of which is acrylonitrile with a drying or semi-drying oil-modified alkyd resin comprising 1% - 4% itaconic acid and then cooling the reaction mixture rapidly such that a dispersion of polymer particles of maximum diameter 2 micron is formed. The film-forming materials thus prepared are useful as constituents of fast-drying automotive refinish enamels.