GB303424A - Improvements in the manufacture and production of a black trisazo dyestuff - Google Patents
Improvements in the manufacture and production of a black trisazo dyestuffInfo
- Publication number
- GB303424A GB303424A GB2301627A GB2301627A GB303424A GB 303424 A GB303424 A GB 303424A GB 2301627 A GB2301627 A GB 2301627A GB 2301627 A GB2301627 A GB 2301627A GB 303424 A GB303424 A GB 303424A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- diazotized
- coupled
- dyestuff
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/36—Trisazo dyes of the type
- C09B35/362—D is benzene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
303,424. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Sept. 1, 1927. Trisazo dyes.-A black trisazo dyestuff is obtained by diazotizing p-aminobenzeneazo-2-amino- 8-naphthol-6-sulphonic acid obtained by acid coupling, coupling in alkaline solution with 2 : 8 : 6-acid, rediazotizing, and coupling with mphenylenediamine. Alternatively one of the components may carry a further sulphonic group. The products have good fastness on cotton and on viscose and like artificial silks but not on acetate silk and are therefore valuable for obtaining colour effects on mixed fabrics containing acetate silk and other artificial silks or cotton or both. The following examples are specified. (1) Diazotized p-nitraniline is coupled in acid solution with 2 : 8 : 6-acid, the monoazo dyestuff is reduced with sodium sulphide, the product is diazotized and coupled in sodium carbonate solution with 2 : 8 : 6-acid, and the separated disazo dyestuff is diazotized and coupled with m-phenylenediamine. (2) The reduced monoazo dyestuff obtained as in (1) is diazotized and coupled in sodium carbonate solution with 2- amino-8-naphthol-3 : 6-disulphonic acid, and the separated disazo dyestuff is diazotized and coupled with m-phenylenediamine. Reference has been directed by the Comptroller to Specifications 19743/92, 7330/93, and 20278/97.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2301627A GB303424A (en) | 1927-09-01 | 1927-09-01 | Improvements in the manufacture and production of a black trisazo dyestuff |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2301627A GB303424A (en) | 1927-09-01 | 1927-09-01 | Improvements in the manufacture and production of a black trisazo dyestuff |
Publications (1)
Publication Number | Publication Date |
---|---|
GB303424A true GB303424A (en) | 1929-01-01 |
Family
ID=10188724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2301627A Expired GB303424A (en) | 1927-09-01 | 1927-09-01 | Improvements in the manufacture and production of a black trisazo dyestuff |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB303424A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0201458A2 (en) * | 1985-05-02 | 1986-11-12 | Ciba-Geigy Ag | Trisazo black dyes |
-
1927
- 1927-09-01 GB GB2301627A patent/GB303424A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0201458A2 (en) * | 1985-05-02 | 1986-11-12 | Ciba-Geigy Ag | Trisazo black dyes |
EP0201458A3 (en) * | 1985-05-02 | 1988-02-03 | Ciba-Geigy Ag | Trisazo black dyes |
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