Process for the preparation of vat dyes from brominated dibenzanthrone and 1-aminoanthraquinone
US4851157A · kind A · utility
0Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1986 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Dec 15, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P1/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of vat dyes that dye cellulosic material in a grey or black shade of good fastness properties. The process comprises brominating dibenzanthrone and reacting the brominated reaction product with 1-aminoanthraquinone in a single step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.