Free amine-containing polymeric dyes
US4339237A · kind A · utility
18Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1980 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Aug 11, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/57
- 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.