Hydrazide compositions, methods employing them and photographic materials containing them

Claim 2

A nucleating agent composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 3

A silver halide photographic emulsion comprising a binder, radiation-sensitive silver halide grains and a nucleating amount of a nucleating composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 4

A silver halide photographic emulsion comprising a binder, radiation-sensitive silver halide grains and a nucleating amount of a nucleating composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 5

A photographic element comprising a support having thereon a layer comprising a silver halide photographic emulsion comprising a binder, radiation-sensitive silver halide grains and a nucleating amount of a nucleating composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 6

A photographic element comprising a support having thereon a layer comprising a silver halide photographic emulsion comprising a binder, radiation-sensitive silver halide grains and a nucleating amount of a nucleating composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 7

A photographic diffusion transfer element comprising a support having thereon a layer comprising a redox dye-releasing compound having associated therewith an internal latent image silver halide emulsion comprising a binder, internal latent image silver halide grains and a nucleating amount of a nucleating agent composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 8

A photographic diffusion transfer element comprising a support having thereon a layer comprising a redox dye-releasing compound having associated therewith an internal latent image silver halide emulsion comprising a binder, internal latent image silver halide grains and a nucleating amount of a nucleating agent composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1.

Claim 9

A photographic film unit comprising (a) an integral imaging receiver element comprising a support, an internal latent image silver halide emulsion comprising a binder, internal latent image silver halide grains and a nucleating agent composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1, a redox dye-releasing compound associated with said emulsion, and a dye image receiving layer; (b) a cover sheet comprising a timing layer, a neutralizing layer and a support; and (c) means for discharging an aqueous alkaline processing composition between the integral imaging receiver element and the cover sheet.

Claim 10

A photographic film unit comprising (a) an integral imaging receiver element comprising a support, an internal latent image silver halide emulsion comprising a binder, internal latent image silver halide grains and a nucleating agent composition comprising a triazole substituted phenylhydrazide and a thiourea substituted phenylhydrazide wherein the molar ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:20 and 20:1, a redox dye-releasing compound associated with said emulsion, and a dye image receiving layer; (b) a cover sheet comprising a timing layer, a neutralizing layer and a support; and (c) means for discharging an aqueous alkaline processing composition between the integral imaging receiver element and the cover sheet.

Claim 11

The invention of claim 1, 2, 3, 4 or 5 wherein said triazole substituted phenyl hydrazide has the formula: ##STR18## wherein: R is an acyl group; φ is a phenylene or substituted phenylene group; and A is a moiety comprising a triazole nucleus capable of promoting adsorption to a silver halide grain surface.

Claim 12

The invention of claim 1, 2, 3, 4 or 5 wherein said thiourea substituted phenylhydrazide has the formula: ##STR19## wherein: R 3 is hydrogen; an alkyl, cycloalkyl, haloalkyl, alkoxyalkyl or phenylalkyl substituent or a phenyl nucleus having a Hammett sigma-value-derived electron withdrawing characteristic more positive than -0.3; R 4 is a phenylene or alkyl, halo- or alkoxysubstituted phenylene group; R 5 is an alkyl, haloalkyl, alkoxyalkyl or phenylalkyl substituent having from 1 to 18 carbon atoms; a cycloalkyl substituent; a phenyl nucleus having a Hammett sigma-value-derived electron withdrawing characteristic less positive than +0.50; napththyl or ##STR20## R 6 is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl.

Claim 13

The invention of claim 1, 2, 3, 4 or 5 wherein the ratio of said triazole substituted phenylhydrazide to said thiourea substituted phenylhydrazide is between 1:4 and 2:1.

Claim 14

The invention of claim 2, 3, 4 or 5 wherein said hydrazide composition is present in said emulsion in amounts between 0.05 and 100 mg per mole of silver halide.

Claim 15

The invention of claim 1, 2, 3, 4 or 5 wherein said triazole substituted phenylhydrazide has the formula: ##STR21## and said thiourea substituted phenylhydrazide has the formula: ##STR22##