Aqueous dispersion of polymer, useful in coating of metallic or plastic substrates, comprises polymer obtained from a mixture of monomers

摘要

Aqueous dispersion of polymer (A) comprises polymer obtained from a mixture of monomers, comprising an ethylenically unsaturated monomer not including ionic groups; an ethylenically unsaturated monomer carrier of: a carboxylic group and/or carboxylic anhydride; a second functional group (phosphate and phosphonate); an alkoxysilane functional group; an active carbonyl functional group; and functional group such as hydroxyl group. Aqueous dispersion of polymer (A) comprises polymer obtained from a mixture of monomers, comprising (parts in weight): (a) an ethylenically unsaturated monomer (100) not including ionic groups; (b) an ethylenically unsaturated monomer carrier (0.5-15) of at least a carboxylic functional group and/or carboxylic anhydride; (c) an ethylenically unsaturated monomer carrier of at least a second functional group (phosphate and phosphonate) in a ratio (c/(b+c)) of 0.05-0.4; (d) an ethylenically unsaturated monomer carrier (0-2) of at least an alkoxysilane functional group; (e) an ethylenically unsaturated monomer (0-2) carrying at least an active carbonyl functional group; and (f) an ethylenically unsaturated monomer carrier (0-10, preferably 2-8) of at least functional group such as hydroxyl and primary or secondary amine or from a precursor of such groups. Independent claims are also included for: (1) preparation of (A); (2) composition for coating, comprising (A); and (3) metallic or plastic substrate coated of at least one layer of a composition of coating.