Silver halide photographic emulsion

Details Silver halide photographic emulsion Silver halide photographic emulsion

1979-12-04

1981-08-18

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, 430570, 430596, 430603, 430604, G03C 102, G03C 128

Patent

active

042847176

ABSTRACT:
A silver halide photographic emulsion containing silver halide grains formed in the presence of a silver halide solvent of the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a subtituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group (e.g., allyl group), a substituted or unsubstituted aryl group or a substituted or unsubstituted nitrogen-containing heterocyclic ring; or R.sub.1 and R.sub.2, R.sub.2 and R.sub.3, and R.sub.3 and R.sub.4 when taken together may form a 5- or 6-membered heterocyclic ring; provided at least one of R.sub. to R.sub.4 is a 5- or 6-membered nitrogen-containing heterocyclic ring, an alkyl group or aryl group substituted with an amino group, an alkyl grop substituted with a nitrogen-containing heterocyclic ring, or R.sub.1 and R.sub.2, R.sub.2 and R.sub.3, or R.sub.3 and R.sub.4 combine to form a 5- or 6-membered nitrogen-containing heterocyclic ring containing at least two nitrogen atoms.

REFERENCES:
patent: 2410689 (1946-11-01), Sheppard et al.
patent: 3287137 (1966-11-01), McBride
patent: 3320069 (1967-05-01), Illingsworth
patent: 3364032 (1968-01-01), Jones
patent: 3773516 (1973-11-01), Gutoff
patent: 3817756 (1974-06-01), Claes et al.
patent: 4067739 (1978-01-01), Lewis
patent: 4184878 (1980-01-01), Maternaghan

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