Process for the preparation of the copper complex disazo compounds from disazo compounds containing an O'-alkoxyaniline group by coppering dimethylation at a pH at about 3-6
US4760134A · kind A · utility
3Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1985 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Aug 28, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/515
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is that of an improved process for preparing 1:1 copper complex disazo compounds which comprises treating a disazo compound of the following general formula (2): ##STR1## wherein: M is hydrogen or the equivalent monovalent or divalent metal and PA1 Y is the vinyl group or CH.sub.2 --CH.sub.2 --Z wherein Z is a radical that can be eliminated by an alkaline agent with a copper donor at a temperature from about 70.degree. to about 130.degree. C. and at a pH from about 3 to about 6. The compounds of the process of the invention are used as dyestuffs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.