| 摘要 |
<p>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:
<UnorderedLists id="ula01" listStyle="none"><ListItem>(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,</ListItem><ListItem>(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</ListItem><ListItem>(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.</ListItem></UnorderedLists></p><p>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.</p> |
