Water-soluble amine-linked polymeric colorants
US4051138A · kind A · utility
9Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1975 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Dec 8, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/57
- 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.