Photographic materials and process comprising polymeric couplers

Abstract From the Canadian patent

Photographic silver halide materials comprise a polymeric coupler which is at least a copolymer having a repeating unit (A) which comprises at least one coupler moiety (COUP) capable of forming a dye upon coupling with an oxidized color developing agent and at least one repeating unit (B) which is derived from a monomer which is an alkoxyalkylacrylate. The polymeric coupler optionally comprises at least one repeating unit (C) derived from such monomers as those useful for repeating unit (A) those useful for repeating unit (B) and other monomers which can be selected to provide useful physical and chemical properties. The photographic material comprising such a polymeric coupler upon …