Synthetic polymer latices in photographic silver halide emulsion

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

1977-11-08

1979-03-20

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Ionizing electrode details

96108, 96110, 96114, 961145, G03C 172, G03C 138, G03C 106

Patent

active

041452216

ABSTRACT:
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 ##STR1## where R.sub.5 is a straight or branch-chain alkyl group of C.sub.4 -C.sub.12, R.sub.6 is a straight of branch-chain alkyl group of C.sub.8 -C.sub.20, n is an integer of 8 to 40, and M.sup.+ is an ammonium ion or, a monovalent metal ion such as potassium, sodium or cesium, is the dispersing agent during emulsion polymerization.

REFERENCES:
patent: 3178295 (1965-04-01), Minsk et al.
patent: 3178296 (1965-04-01), Minsk et al.
patent: 3325286 (1967-06-01), Nottorf
patent: 3507661 (1970-04-01), Ofstead
patent: 3508925 (1970-04-01), Whiteley et al.
patent: 3623878 (1971-11-01), Nishio et al.
patent: 3764327 (1973-10-01), Nagae et al.

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