Silver halide photographic light-sensitive materials

Details Silver halide photographic light-sensitive materials Silver halide photographic light-sensitive materials

1986-02-24

1987-10-27

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430611, 430957, 430448, G03C 134

Patent

active

047029994

ABSTRACT:
Disclosed are novel antifoggant precursors having the general formula (I) or (II) which are sufficiently stable in a wealkyl acidic medium, are markedly effective in restraining over-development fog and besides cause little loss of sensitivity: ##STR1## (wherein Y represents oxygen atom or ##STR2## X represents OR.sub.3 when Y is oxygen atom and R.sub.3 when Y is ##STR3## where R.sub.1 and R.sub.2 each represents hydrogen atom, alkyl group aryl group and R.sub.3 represents hydrogen atom, alkyl group or phenyl group; R.sub.4 -R.sub.6 each represent hydrogen atom, halogen atom, alkyl group, carboxyl group, alkoxycarbonyl group or phenyl group, R.sub.4 and R.sub.5 may form together a benzene ring; R.sub.7 represents hydrogen atom, alkyl group or phenyl group; and A represents a heterocyclic group of the mercapto antifoggant.) ##STR4## (wherein X, Y, R.sub.4 -R.sub.5 and A are the same as defined for the general formula (I) and R.sub.4 and R.sub.5 or R.sub.5 and R.sub.6 may form together a benzene ring.).

REFERENCES:
patent: 2824001 (1958-02-01), Allen et al.
patent: 3674478 (1972-07-01), Grasshoff et al.
patent: 4416977 (1983-11-01), Ohashi et al.
patent: 4420554 (1983-12-01), Ohashi et al.

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