Photographic elements containing a cyan dye-forming coupler, stabilizer and solvent
US6548234B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Sep 19, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a photographic element comprising at least one light-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, UV absorber and(A) a stabilizer of formula (I) whereinR1 is an unsubstituted or substituted alkyl or aryl group or a 5- to 10- membered heterocyclic ring which contains one or more heteroatoms selected from nitrogen, oxygen and sulfur, which ring is unsubstituted or substituted;Z is a hydrogen atom or a substituent group;X is a group selected from —SO2—, —SO—, —COO—,—CO— and —CS—,W is one or more unsubstituted or independently substituted alkylene groups connecting the nitrogen atom to X, and p is 0 or 1;R2 is a substituent group; orthe groups represented by Z and R2 can be joined to form a ring which may be substituted; and(B) a high-boiling solvent of formula (II) whereinR3 is an unsubstituted or substituted alkyl or aryl group; andG is an unsubstituted or substituted alkyl group.The invention provides improved light and dark stability in a photographic element without degradation in hue or reactivity of the dyes therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.