FIELD: aniline dye industry, in particular direct black tetrakisazo dyes for staining and printing of textile materials.
SUBSTANCE: claimed method includes tetrazotization of 4,4'-diaminebiphenyl-2-sulfonic acid, coupling reaction of tetrazotized compound with 2-amino-8-naphthol-6-sulfonic acid in base medium, tetrazotization of obtained disazotized compound, coupling of obtained tetrazotized disazotised compound with 1,3-diaminobenzene or N-β-hydroxiethyl-1,3-phenylenediamine at pH 2.0-2.5, treatment of obtained tetrakisazotised compound with base up to pH 9.0-9.3, followed by filtration. Obtained target dye is preferably treated with inert filler to provide commercial dye.
EFFECT: dyes with dyeing class of 750-780 % and commercial dyes with dyeing class of 675 %.
3 cl, 2 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING TETRACISAZO DYES | 1992 |
|
RU2016024C1 |
| DIRECT TETRAKISAZODYES FOR LEATHER AND CELLULOSE FIBER STAINING TO PROFOUND BLACK COLOR | 1994 |
|
RU2069679C1 |
| 0 |
|
SU416954A3 | |
| METHOD OF BLACK TRIS-AZODYE SYNTHESIS FOR LEATHER | 0 |
|
SU1799884A1 |
| METHOD FOR PRODUCTION OF ACID MONOAZO DYE | 1992 |
|
RU2053242C1 |
| MORDANT DYE FOR WOOL BLACK COLOR STAINING | 1994 |
|
RU2064947C1 |
| LIQUID DISCHARGED FORM OF ACTIVE DYE | 1992 |
|
RU2064950C1 |
| 0 |
|
SU149359A1 | |
| 0 |
|
SU332636A1 | |
| METHOD OF ACIDIC YELLOW MONOAZO-DYE SYNTHESIS | 1990 |
|
RU2007429C1 |
