Abstract: The invention relates to an aqueous polymer dispersion which can be obtained from a mixture of monomers comprising, in parts by weight: a) 100 of at least one ethylenically unsaturated monomer not comprising an ionic group, b) 0.5 to 15 of at least one ethylenically unsaturated monomer carrying at least one carboxyl and/or carboxylic anhydride functional group, c) at least one ethylenically unsaturated monomer carrying at least one second functionality selected from: phosphate, phosphonate or phosphinate, in an amount such that the ratio c/(b+c) varies from 0.05 to 0.

Abstract: The invention relates to an aqueous polymeric dispersion comprising polymeric particles bearing silane and carboxylic groups, the said carboxylic groups being possible to be either in the form of acid or of its salt with monovalent cation, the said polymer particles being crosslinked by the presence of at least one multivalent metal compound selected from: oxides, hydroxides or its salts or complexes, with the Tg of the said polymer being not higher than 0° C. The invention also relates to a preparation process, to a composition for leather treatment comprising the said dispersion, to its use in the treatment of leather, in particular for embossed and automotive leather, and to a leather treated with the said composition.

Abstract: The invention relates to an aqueous polymer dispersion which can be obtained from a mixture of monomers comprising, in parts by weight: a) 100 of at least one ethylenically unsaturated monomer not comprising an ionic group, b) 0.5 to 15 of at least one ethylenically unsaturated monomer carrying at least one carboxyl and/or carboxylic anhydride functional group, c) at least one ethylenically unsaturated monomer carrying at least one second functionality selected from: phosphate, phosphonate or phosphinate, in an amount such that the ratio c/(b+c) varies from 0.05 to 0.