GB604831A - A new azo-dyestuff - Google Patents

A new azo-dyestuff

Info

Publication number
GB604831A
GB604831A GB3287545A GB3287545A GB604831A GB 604831 A GB604831 A GB 604831A GB 3287545 A GB3287545 A GB 3287545A GB 3287545 A GB3287545 A GB 3287545A GB 604831 A GB604831 A GB 604831A
Authority
GB
United Kingdom
Prior art keywords
coupling
molecular proportion
dyestuff
acid
alkaline medium
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
GB3287545A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB3287545A priority Critical patent/GB604831A/en
Publication of GB604831A publication Critical patent/GB604831A/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
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
    • C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
    • C09B35/463—D being derived from diaminodiphenyl

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Abstract

A trisazo dyestuff, which dyes chrome-tanned leather in grey to greenish-black shades, is manufactured by coupling in acid medium one molecular proportion of tetrazotized benzidine with one of 1 : 8-aminonaphthol-3 : 6-disulphonic acid, coupling the resulting diazo-azo compound with one molecular proportion of diazotized sulphanilic acid in alkaline medium, and then coupling the resulting diazo-disazo compound with one molecular proportion of m-aminophenol in alkaline medium. Specifications 578,000 and 580,122 are referred to.
GB3287545A 1945-12-05 1945-12-05 A new azo-dyestuff Expired GB604831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3287545A GB604831A (en) 1945-12-05 1945-12-05 A new azo-dyestuff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3287545A GB604831A (en) 1945-12-05 1945-12-05 A new azo-dyestuff

Publications (1)

Publication Number Publication Date
GB604831A true GB604831A (en) 1948-07-12

Family

ID=10345322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3287545A Expired GB604831A (en) 1945-12-05 1945-12-05 A new azo-dyestuff

Country Status (1)

Country Link
GB (1) GB604831A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031273B (en) * 1953-11-23 1958-06-04 Cassella Farbwerke Mainkur Ag Production of deep, neutral black coloring on leather
US4701525A (en) * 1984-07-24 1987-10-20 Ciba-Geigy Ag Polyazo dyestuffs having high UV absorption

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031273B (en) * 1953-11-23 1958-06-04 Cassella Farbwerke Mainkur Ag Production of deep, neutral black coloring on leather
US4701525A (en) * 1984-07-24 1987-10-20 Ciba-Geigy Ag Polyazo dyestuffs having high UV absorption

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