Color photographic elements containing yellow-colored magenta dye-forming masking couplers

US6010839A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Michael W. Crawley · Kingswood, GB
• Krishnan Chari · Rochester, US
• Allan F. Sowinski · Rochester, US

Key dates

• Filing date: Jun 26, 1998
• Grant date: Jan 4, 2000
• Expiry date: Jun 26, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/3335
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A multilayer silver halide color photographic element is disclosed comprising a support bearing a light-sensitive silver halide emulsion layer and a non-diffusible yellow-colored magenta dye-forming masking coupler of the following formula ##STR1## wherein COUP is a magenta dye-forming coupler having the azo group attached to its coupling position; ARYL represents an aromatic group, including optionally further substituted phenyl, naphthyl or heteroaryl groups; m represents an integer of from 1 to 4; each L.sup.1 represents a divalent linking group, preferably --O(CH.sub.2).sub.y --, --NHCO(CH.sub.2).sub.y --, or --NRCO(CH.sub.2).sub.y --, where R represents an alkyl or aryl group and y represents an integer from 1 to 4; each k is either 0 or 1; each L.sup.2 represents --NHSO.sub.2 --, --NHCO--, --SO.sub.2 NH--, or --CONH--, preferably at least one L.sup.2 group being --NHSO.sub.2 -- or --SO.sub.2 NH--, more preferably --NHSO.sub.2 --; each Z represents --SO.sub.3 M or --PO.sub.3 M, where M represents H or a counter ion such as Na, K, Li, or NH.sub.4 ; and n represents an integer of from 1 to 5, with the provisos that when at least one L.sup.1 or L.sup.2 group comprises an --NHSO.s…