Free amine-containing polymeric dyes
US4382800A · kind A · utility
6Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Sep 28, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/917
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Soluble polymeric colorants composed of free amine groups and chromophoric groups covalently bonded to an organic backbone are disclosed. The number of free amine groups is not less than one-half the number of chromophoric groups. The colorants are characterized by being free of sulfonate, phosphonate and carboxylate groups. The preparation and use of these colorants is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.