Photographic element, compound, and process
US6190850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/346
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan "NB coupler" having the formula (I): ##STR1## wherein: PA1 the term "NB coupler" represents a coupler of formula (I) that forms a dye for which the left bandwidth (LBW) using spin-coating is at least 5 nm less than that of the same dye in solution form; PA1 Y is H or a coupling-off group; PA1 each Z" and Z* is an independently selected substituent group where n is 1 to 4 and p is 0 to 2; PA1 W.sup.2 represents the atoms necessary to complete a carbocyclic or heterocyclic ring group; and PA1 V is a sulfone or sulfoxide containing group; PA1 provided that the combined sum of the aliphatic carbon atoms in V, all Z" and all Z* is at least 8; and the sum of the aliphatic carbon atoms in all Z" substituents combined is at least 6; PA1 provided further that when W.sup.2 forms a carbocyclic aromatic ring, at least one Z" is selected from the group consisting of alkoxy, alkylaryl, aryloxy, carbonamido, cyano, halogen, hydroxy, nitro, oxysulfonyl, sulfoxide, thio, and ureido groups. The element exhibits improved cyan dye hue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.