Sulfonic-acid-group containing disazo dyestuffs
US4051123A · kind A · utility
18Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1975 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Aug 21, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/29
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a first main aspect azo dyestuffs of the formula ##STR1## wherein A, B, X and Y are certain substituents, in a second main aspect azo dyestuffs of the formula ##STR2## wherein B' represents certain substituents and in a third main aspect azo dyestuffs of the formula EQU A.sub.1 --N.dbd.N--B.sub.1 --NH--CO--X.sub.1 --Y--Z.sub.1 --OC--HN--B.sub.1 --N.dbd.N--A.sub.1 wherein A.sub.1, B.sub.1, X.sub.1, Z.sub.1 and Y are certain substituents as well as the use of said azo dyestuffs in photographic material are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.