Water-soluble amine-linked polymeric colorants
US4144252A · kind A · utility
12Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1977 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Feb 7, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/03
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Polymeric colorants comprising a hydrocarbon backbone and attached directly thereto through amine linkages, at least one water-solubilizing group and at least one optically chromophoric group are disclosed. In a preferred embodiment, the backbone is a saturated aliphatic hydrocarbon, the chromophore is an anthraquinone chromophore and the solubilizing group is a sulfonate or sulfamate residue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.