Oil-soluble disazo dyes and their use in color-photographic recording materials for the silver dye bleach process
US4521591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1982 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Feb 8, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/29
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## in which X.sub.1 is hydrogen, alkyl, alkoxy, --NL.sub.1 COM.sub.1, in which L.sub.1 is hydrogen or alkyl and M.sub.1 is alkyl or alkoxy, or is --NL.sub.1 P(O)(OG.sub.1).sub.2, in which G.sub.1 is alkyl, or is alkylsulfonamide or hydroxyl, Y.sub.1 is hydrogen, alkyl, alkoxy, carbalkoxy, N-alkyl-substituted or N,N-dialkyl-substituted amino or --NL.sub.2 COM.sub.2, in which L.sub.2 is hydrogen or alkyl and M.sub.2 is alkyl or alkoxy, Z.sub.1 is hydrogen, alkyl, alkoxy, --NL.sub.2 COM.sub.3, in which M.sub.3 is alkyl, or is carbalkoxy or halogen or represents those atoms which are required to form a ring with Y.sub.1, W.sub.1 is hydrogen, alkyl or alkoxy, R.sub.1 and R.sub.2 independently of one another are hydrogen, halogen, cyano, nitro or --SO.sub.2 U.sub.3, in which U.sub.3 is alkyl or phenyl, R.sub.3 is hydrogen or alkyl or, if R.sub.4 is a direct chemical bond, the two radicals R.sub.3 together are a link member and R.sub.4 is a direct chemical bond or a link member, and at least two of the substituents W.sub.1, X.sub.1, Y.sub.1 and Z.sub.1 are other than hydrogen. The compounds can be used with particular advantage as image dyes, for example in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.