Water-soluble fast polymeric black colorant, its preparation and use in dyes and inks
US4375357A · kind A · utility
15Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1981 |
| Grant date | Mar 1, 1983 |
| Priority date | — |
| Expiry date | Jun 9, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/919
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A family of polymeric black colorants is disclosed. The subject colorants are composed of an organic polymer backbone comprised of a plurality of aromatic rings from which depend via azo groups a plurality of chromophore units having the structure ##STR1## wherein M is hydrogen or preferably a cation. These polymeric colorants are water-soluble, and noncrystalline and form dyes and inks that are fast to paper stock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.