AMINE FUNCTIONAL ANIONIC POLYMER DISPERSION AND COATING COMPOSITIONS THEREOF

The invention relates to a process and the product obtainable by the process for the preparation of an aqueous anionically stabilized polymer dispersion comprising a first emulsion polymerization of a first monomer mixture comprising acid functional monomers and substantially no amine functional monomers to form a the first phase oligomer, neutralising and a second emulsion polymerisation in the presence of the emulsion of the first phase of a second monomer mixture comprising amine functional monomers having sterically hindered secondary amine or tertiary amine groups and substantially no acid functional monomers to form a second phase of an amine functional polymer wherein the two phases are unmixed and separate. The invention further relates to the dispersions further comprising reactive and/or non-reactive co-binder, in particular polyepoxide co-binder and also relates to the use of the dispersions for preparation of coating compositions and coatings with anti-bleeding properties.