Patent ID: 7244782

Claim:
A composition physically stable one month or more upon storage, consisting essentially of: at least one masked or unmasked polyisocyanate in the form of an aqueous emulsion whose particle size is between 0.1 and 10 micrometres and a polyhydroxylated polymer, in the form of an aqueous dispersion having a mean particle size (d 50 ) and whose particle size is smaller than 100 nanometres, wherein the quantity of polyhydroxylated polymer in the composition, expressed in mass percent, is equal to or more than 5/(6R−20), R being equal to the ratio of the mean size (d 50 ) of the emulsion of polyisocyanate to that of the dispersion of polyhydroxylated polymer; said polyhydroxylated polymer being in the form of a nanolatex which has been made by a process of incrementally introducing the monomers and the initiators into an aqueous reaction medium so that the ionicity of the reaction medium remains constant.