Synthetic polymer latices in photographic silver halide...

Details Synthetic polymer latices in photographic silver halide... Synthetic polymer latices in photographic silver halide...

G - Physics

03

C

96/146, 96/147

G03C 1/72 (2006.01) G03C 1/043 (2006.01)

Patent

CA 1128801

FDN-1023 SYNTHETIC POLYMER LATICES IN PHOTOGRAPHIC SILVER HALIDE EMULSIONS CONTAINING MULTIVALENT METAL SALTS Abstract of the Disclosure Physical and photographic characteristics of silver halide emulsions containing salts of multivalent metals are improved by adding synthetic water-insoluble terpolymers of acrylic esters, glycidyl acrylates and acrylamides as emulsion additives. The crosslinkable terpolymers are highly compatible with silver halide emulsions containing multivalent metal salts when an acrylamide is a polymer component at less than 15 wt% and an anionic sulfate surfactant of the formula Image or Image where R5 is a straight or branch-chain alkyl group of C4-C12, R6 is a straight or branch-chain alkyl group of C8-C20, n is an integer of 8 to 40, and M? is an ammonium ion or, a monovalent metal ion such as potassium, sodium or cesium, is the dispersing agent during emulsion polymerization.

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