Photographic element containing azole couplers

US6521397B1 · kind B1 · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Mbiya Kapiamba · Macedon, US
• Donald R. Diehl · Rochester, US
• James L. Edwards · Rochester, US
• David G. Lincoln · Webster, US
• Gary M. Russo · Rochester, US

Key dates

• Filing date: Apr 12, 2002
• Grant date: Feb 18, 2003
• Expiry date: Apr 12, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/382
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Disclosed is a photographic element comprising a support bearing a light sensitive silver halide emulsion layer having associated therewith a dye forming coupler having a formula I, wherein:Ballast is a group containing at least 6 aliphatic carbon atoms,V represents a chain of three or four atoms, which may be substituted, selected from C, N, O and S sufficient to form an aromatic ring fused to the azole ring and n is 0 or 1, provided that if n is 0, Y and Ballast are directly attached to the 5-membered azole ring,W is an electron withdrawing group selected from the group consisting of —CN, —CONR1R2, —CO2R1, —NO2, and —SO2R1 where R1 and R2 are H or substituents;X is H or a coupling-off group;Y is H or a substituent;Z is an atom or group selected from >N—R, —O—, and —S—.