Simplified preparation of polymeric couplers for photographic use by free radical copolymerization of organic solvent solution of monomeric coupler dispersed in water containing a protective colloid

摘要

Preparation of a polymeric coupler is by dispersing a mixture of a monomeric coupler, a comonomer and an organic solvent in water containing a protective colloid and then polymerizing the mixture by heating it in the presence of a monomer-soluble polymerization initiator.