Water-soluble polymeric colorants containing anionic water-solubilizing groups
US4169203A · kind A · utility
7Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1976 |
| Grant date | Sep 25, 1979 |
| Priority date | — |
| Expiry date | Nov 18, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/03
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Acetylation of residual primary and secondary alkyl amine groups present in the structure of polymeric colorants and the acetylated colorant products are disclosed. The acetylation is a post production step. The acetylation improves the colorants' water solubility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.