Coupler for photography
US4532202A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1983 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Dec 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/346
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a coupler for photography represented by the formula: ##STR1## wherein R.sub.1 represents a branched alkyl group having 3 to 5 carbon atoms; R.sub.2 represents an aryl group; X represents a divalent linking group; Ar represents an aryl group; and Z is a hydrogen atom or a group eliminable through the coupling reaction with the oxidized product of an aromatic primary amine type color developing agent, and a light-sensitive silver halide photographic material comprising the same. The coupler mentioned above is not only excellent in solubility in organic solvents, but also can be easily purified, thus being capable of exhibiting excellent characteristics with respect to spectral absorption characteristics, sensitivity, color density, color staining as well as with respect to image storability such as light resistance, heat resistance and humidity resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.