GB303424A - Improvements in the manufacture and production of a black trisazo dyestuff - Google Patents

Improvements in the manufacture and production of a black trisazo dyestuff

Info

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
Application number
GB2301627A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB2301627A priority Critical patent/GB303424A/en
Publication of GB303424A publication Critical patent/GB303424A/en
Expired legal-status Critical Current

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.
GB2301627A 1927-09-01 1927-09-01 Improvements in the manufacture and production of a black trisazo dyestuff Expired GB303424A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201458A2 (en) * 1985-05-02 1986-11-12 Ciba-Geigy Ag Trisazo black dyes

Cited By (2)

* Cited by examiner, † Cited by third party
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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