Betainic azo dyestuffs containing cobalt in complex union with a colorless, tridentate ligand
US4008211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1973 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Jul 30, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/917
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Betainic complex azo dyestuff-cobalt compound consisting essentially of, per molecule: PA1 A cobalt atom; PA1 One molecule of a colorless tridentate organic ligand which is coordinatively bound to said cobalt atom by way of three nitrogen atoms which is free from ionogenic groups which do not partake in complex formation, each of said nitrogen atoms participating in the formation of a 5- to 6- membered ring of which said cobalt atom is a member; and PA1 One radical of a mono- or dis- azo dyestuff capable of forming a bicyclic metal complex with cobalt and containing one sulphonic acid group, whereby a complex dyestuff-cobalt compound is formed which has the character of an inert salt (betaine), are disclosed. These compounds are useful for the dyeing and/or pigmenting of polymeric and copolymeric organic material, e.g., lacquers, synthetic plastics or spinning masses, as well as for the dyeing of polyamide fibers from weekly acid bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.