Abstract: This invention relates to aqueous "multi-pack" coating compositions, that is, those which comprise at least two discrete components (or "packs") which are mixed prior to application.Prior attempts to provide an aqueous multi-pack composition have failed to provide a suitable combination of the desirable characteristics of adequate "pot-life" (the time for which the mixed components remain workable) and early development of adequate mechanical properties.The compositions of the present invention which provide such a combination consist of a number of components which together comprise a constituent having epoxide groups, a constituent comprising addition polymer in the form of an aqueous dispersion and a constituent capable of reacting with epoxide groups. In an especially preferred embodiment, the aqueous addition polymer dispersion is combined with at least one of the other constituets in the form of a multi-polymer particle dispersion.

Abstract: This invention relates to aqueous "multi-pack" coating compositions, that is, those which comprise at least two discrete components (or "packs") which are mixed prior to application.Prior attempts to provide an aqueous multi-pack composition have failed to provide a suitable combination of the desirable characteristics of adequate "pot-life" (the time for which the mixed components remain workable) and early development of adequate mechanical properties.The compositions of the present invention which provide such a combination consist of a number of components which together comprise a constituent having epoxide groups, a constituent comprising addition polymer in the form of an aqueous dispersion and a constituent capable of reacting with epoxide groups. In an especially preferred embodiment, the aqueous addition polymer dispersion is combined with at least one of the other constituents in the form of a multi-polymer particle dispersion.

Abstract: An acrylic coating composition suitable for use as an automotive refinish lacquer comprises a mixture of(a) a solution in volatile organic solvent of an acrylic copolymer of 75-90% methyl methacrylate, 1.5-6.0% dimethylaminoethyl methacrylate and 8-23.5% of butyl acrylate, butyl methacrylate or lauryl methacrylate, the copolymer having a Tg of 80.degree.-95.degree. C.;(b) a solution in volatile organic solvent of cellulose acetate butyrate, the cellulose acetate butyrate having a viscosity of 0.5-5 sec and a hydroxyl value of 2 maximum; and(c) a monomeric ester plasticizersuch that the non-volatile constituents of (a), (b) and (c) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (a) plus (b) plus (c).