Use of colorants for recording fluids
US5102459A · kind A · utility
36Cited by
18References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1991 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | May 28, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method using water-soluble dyestuffs for coloring recording fluids, particularly in the ink jet process, wherein the dyestuffs in the form of the free acid have the general formula A--(SO.sub.2 -X).sub.p. The dyestuffs (I) can be prepared analogously to methods for preparing known vinylsulfone or .beta.-sulfatoethylsulfone dyestuffs which are further reacted with nucleophiles R.sup.1 OH, HNR.sup.1 R.sup.2, HSR.sup.1 etc. Some of the reaction products are novel dyestuffs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.