Imidazole azo dyes
US4743683A · kind A · utility
1Cited by
13References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Dec 3, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/29
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A photographic recording material which contains at least one dye of the formula ##STR1## wherein D is the group of atoms necessary to complete a 5-membered ring that contains at least one nitrogen atom, A is hydrogen, alkyl, alkoxy, phenyl, alkylthio, cyano, nitro or halogen, n is 0 to 3, R.sub.1 is hydrogen, alkyl, hydroxyl, acylamino, R.sub.6 is hydrogen or unsubstituted or substituted amino, and R.sub.4 is hydrogen or alkoxy. The material is distinguished by good color reproduction, brilliant colors and excellent lightfastness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.