Yellow-dye-forming couplers

Details Yellow-dye-forming couplers Yellow-dye-forming couplers

G - Physics

03

C

96/37, 260/473.5

G03C 1/40 (2006.01) G03C 7/36 (2006.01)

Patent

CA 1128543

Abstract of the Disclosure Novel bis yellow-dye-forming couplers are incorporated in photographic emulsions and elements. The couplers are represented by the structural formula Image where: R is an aryl group of 6 to 12 carbon atoms, an aryloxyalkylene or arylthioalkylene group having 6 to 12 carbon atoms in the aryl portion of the group and 1 to 4 carbon atoms in the alkylene portion of the group, or an alkyl group of 1 to 8 carbon atoms; R1 is an alkyl group of 4 to 16 carbon atoms; R2 represents one or more halogen, lower alkyl, lower alkoxy, carboxy or lower alkoxycarbonyl substituents wherein the alkyl group and the alkyl portion of the alkoxy and alkoxycarbonyl groups contains 1 to 6 carbon atoms; and X is sulfonyl, carbonyl or alkylenedisulfonamide containing 1 to 4 carbon atoms.

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