Sensitizing dye for photographic materials
US5135845A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Apr 10, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sensitizing dyes for photographic materials are disclosed. The dyes have the formula: ##STR1## Z.sub.1 represents the atoms necessary to complete a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a benzotellurazole nucleus, or a benzimidazole nucleus, which, in addition to being substituted by R.sub.3, may be further substituted or unsubstituted, PA0 Z.sub.2 represents the atoms necessary to complete a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a benzotellurazole nucleus, or a benzimidazole nucleus, which, in addition to being substituted by F, may be further substituted or unsubstituted, PA0 R represents H or substituted or unsubstituted alkyl or aryl, PA0 R.sub.1 and R.sub.2 each independently represents substituted or unsubstituted alkyl or aryl, PA0 R.sub.3 represents an aryl group that may be appended to or fused with Z.sub.1, and PA0 X is a counterion as needed to balance the charge of the molecule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.