ELEMENTO FOTOGRAFICO AGLI ALOGENURI D'ARGENTOM COMPOSIZIONE DI STESA FOTOGRAFICA E PROCEDIMENTO PER PREPARARE UNA DISPERSIONE ACQUOSA DI UN COMPOSTO IDROFOBO

A polymeric latex to load photographically useful compounds into photographic elements comprises, as a dispersed phase, fine particles of a hydrophobic polymer which, for at least 70% of its weight, comprises:(a) repeating units derived from an ethylenic monomer containing a sulfonic or sulfonate group which monomer is capable of forming hydrophilic homopolymers, said units comprising 0-5 to 1.5% by weight of said hydrophobic polymer,(b) repeating units derived from an N-3-oxo-alkylsubstituted acrylamide, said units comprising from 5 to 25% by weight of said hydrophobic polymer, and(c) repeating units derived from acrylic acid ester monomers having a TG lower than 0°C, said units comprising at least 43·5% by weight of said hydrophobic polymer, the remaining polymer weight percentage, from zero to 30%, being formed by repeating units derived from inert monomers and/or cross-linking monomers.Such polymeric latex can be loaded with hydrophobic compounds to obtain stable coating compositions which are suitable for a uniform dispersion in a hydrophilic layer of a photographic material.