Eastman-kodak Company

Hugh M Williamson

Rakesh Jain

Thomas H Jozefiak

Paul L Stanley

Paul B Merkel

Donald R Diehl

Margaret Jones Helber

Jerrold N Poslusny

Bernard A Clark

Michael W Crawley

Andrew William Gibson

John L Pawlak

Sundaram Krishnamurthy

James P Merrill

The invention provides novel photographic compositions comprising a propene isomer of the formula

Activated propenes as color couplers method for the production thereof

Novel non-diffusible pyrazolo-�1,5-a! benzimidazole color couplers having an alkylene-, oxyalkylene- or arylene- thio coupling-off group, substituted with a carboxylic acid or dialkylamino group, have dye-forming and/or bleach-accelerating properties. The couplers are generally associated with a silver halide emulsion layer coated on a support to form a single color or multi-color photographic element.

Pyrazolo 1,5 a benzimidazole photographic color couplers

The invention provides a pyrazolo�1,5-a!benzimidazole compound of the formula (I) ##STR1## wherein R to R.sup.4 are selected from H, substituted or unsubstituted alkoxy, anilino, aryl, alkyl or amido groups, and X is H or a coupling-off group; characterized in that said compound of Formula I is linked via any of the moieties R to R.sup.4 or X to a compound of the formula (II): ##STR2## wherein W is an electron withdrawing group and L is a linking group. Compounds with the low pKa phenolic substituent provide improved coupling activity when used with a photographic element and improved contrast.

Phenol substituted pyrazolo 1, 5-a benzimidazole couplers

The invention provides a photographic element comprising a support bearing a blue-light sensitive silver halide emulsion layer containing an acylacetanilide yellow image dye-forming coupler having formula I or II: ##STR1## wherein: R.sub.a is a substituted or unsubstituted alkyl, alkoxy, or aryloxy group; R.sub.b is a substituted or unsubstituted alkyl or aryl group; R.sub.c is hydrogen or a substituted or unsubstituted alkyl group; R.sub.1 is a substituent; n is an integer from 0 to 2; R.sub.2 is selected from the group consisting of halogen, trifluoromethyl, and substituted or unsubstituted alkoxy and aryloxy; R.sub.3 is a substituted or unsubstituted alkyl group; R.sub.4 is hydrogen, halogen, alkoxy carbonyl (--CO.sub.2 R), carbamoyl (--CONRR'), carbonamido (--NRCOR'), sulfonamido (--NRSO.sub.2 R') or trifluoromethyl; R.sub.1 is a substituent; X is hydrogen or a coupling-off group; wherein said blue-light sensitive silver halide emulsion layer is a low-chloride silver halide emulsion. The invention enables improved image quality through increased interimage effects.

Photographic element containing a certain sulfonated acylacetanilide

Photographic color couplers and photographic materials containing them

Imine dyes useful in photographic materials have the formula ##STR1## wherein R.sup.1, E.sup.1, E.sup.2, L.sup.1, L.sup.2, L.sup.3,D and m are defined as in the specification. Solid particle dispersions of dyes of formula (I) that contain at least one base-ionizable functional group such as carboxy, sulfonamido, or sulfamoyl are useful as filter dyes in photographic elements.

Imine dye and photographic elements containing same

Activated propenes as color couplers and a method for production of

The present invention provides a photographic element comprising a support bearing a blue-light sensitive silver halide emulsion layer containing an acylacetanilide yellow image dye-forming coupler having formula I or II: ##STR1## wherein: R.sub.a is a substituted or unsubstituted alkyl groups, alkoxy group or aryloxy group; R.sub.b is a substituted or unsubstituted alkyl or aryl group; R.sub.c is hydrogen or a substituted or unsubstituted alkyl group; R.sub.1 is a substituent; n is an integer from 0 to 2; R.sub.2 is selected from the group consisting of halogen, trifluoromethyl, and substituted or unsubstituted alkoxy and aryloxy; R.sub.3 is substituted or unsubstituted alkyl; R.sub.4 is hydrogen, halogen, alkoxy carbonyl (--CO.sub.2 R), carbamoyl (--CONRR'), carbonamido (--NRCOR'), sulfonamido (--NRSO.sub.2 R') or trifluoromethyl; and X is hydrogen or a coupling-off group; and wherein the blue-light sensitive silver halide emulsion layer has associated therewith a development inhibitor releasing coupler. The invention also provides a method of forming an image in such an element.

Activated propenes as colour couplers

A photographic element having at least one photosensitive silver halide layer and associated therewith both a particular type of color coupler and a particular type of stabilizer. The color coupler is of the general formula (1) or (2): ##STR1## wherein A and B represent the same or different electron-withdrawing group, X is H or a group which splits off on coupling with oxidized color developer, R is an alkyl, cycloalkyl, aryl or heterocyclic which may be substituted, --COR.sup.1, --CSR.sup.1, SOR.sup.1, SO.sub.2 R.sup.1, --NHCOR.sup.1, --CONHR.sup.1, --COOR.sup.1, --COSR.sup.1, --NHSO.sub.2 R.sup.1 wherein R.sup.1 is an alkyl, cycloalkyl, or aryl group any of which are optionally substituted, and wherein two or more of A, B, R, and X optionally form part of a ring, Link is a linking group and n is 0, 1 or 2. The stabilizer is of the general formula (II), (III) or (IV): ##STR2## wherein the substituents of (II), (III) and (IV) are as defined in the specification.

Photographic elements containing particular color couplers in

A photographic element comprising a support, at least one photosensitive silver halide layer and associated therewith a color coupler and a stabilizer therefor which stabilizer is an acrylate or acrylamide homopolymer or copolymer of low water solubility, the color coupler being of the general formula (1) or (2): ##STR1## wherein A and B represent the same or different electron-withdrawing group,

A photographic element having at least one photosensitive silver halide layer and associated therewith both a particular type of color coupler and a particular type of stabilizer. The color coupler is of the general formula (1) or (2): ##STR1## wherein A and B represent the same or different electron-withdrawing group,

Imine dyes useful in photographic materials have the formula ##STR1## wherein D is selected from ##STR2## and wherein E.sup.1, E.sup.2, E.sup.3, and E.sup.4 each individually represents strongly electron-withdrawing groups; R.sup.1 and R.sup.6 each individually represents an alkyl group of 1 to about 8 carbon atoms, or an aralkyl or cycloalkyl group of 5 to about 10 carbon atoms, or an aryl group of 6 to about 14 carbon atoms; R.sup.2, R.sup.3, and R.sup.11 each individually represents an alkyl group of 1 to about 8 carbon atoms, or an alkenyl group of 2 to about 8 carbon atoms, or an aryl, aralkyl, or cycloalkyl group of 5 to about 14 carbon atoms; or R.sup.2 and R.sup.3 individually represent the non-metallic atoms necessary to form a 5- or 6-membered fused ring with the phenyl ring to which the nitrogen is attached, or together represent the non-metallic atoms required to form a 5- or 6-membered ring with each other; R.sup.4, R.sup.7, R.sup.8, R.sup.9, and R.sup.10 each individually represents hydrogen, or an alkyl , aralkyl, cycloalkyl, alkoxy, alkylamino, or alkylthio group of 1 to about 10 carbon atoms; R.sup.5 represents an alkyl group of 1 to about 8 carbon atoms, or an aralkyl or cycloalkyl group of 5 to about 10 carbon atoms; R.sup.12 represents cyano, or an aryl, aminocarbonyl, or alkoxycarbonyl group of 2 to about 8 carbon atoms, or an alkylsulfonyl, arylsulfonyl, or sulfamoyl group of 1 to about 8 carbon atoms; or R.sup.11 and R.sup.12 together represent the non-metallic atoms necessary to complete a substituted or unsubstituted ring system containing at least one 5- or 6-membered heterocyclic or unsaturated alicyclic nucleus; G represents O or C(CN).sub.2 ; Y and Z each individually represents the non-metallic atoms necessary to complete a substituted or unsubstituted ring system containing at least one 5- or 6-membered heterocyclic nucleus; M.sup.+ is a cation; L.sup.1 through L.sup.6 each individually represents unsubstituted or substituted methine groups; m is 0, 1, 2, or 3; n is 0 or 1; p is 0, 1, 2, 3, or 4; q is 0, 1, 2, or 3; and r is 0, 1, 2, 3, 4, or 5. Solid particle dispersions of dyes of formula (I) that contain at least one base-ionizable functional group such as carboxy, sulfonamido, or sulfamoyl are useful as filter dyes in photographic elements.

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Hanwell, United Kingdom

Hugh M Williamson