GB432355A - New azo dyestuffs and their application in leather dyeing - Google Patents

New azo dyestuffs and their application in leather dyeing

Info

Publication number
GB432355A
GB432355A GB208334A GB208334A GB432355A GB 432355 A GB432355 A GB 432355A GB 208334 A GB208334 A GB 208334A GB 208334 A GB208334 A GB 208334A GB 432355 A GB432355 A GB 432355A
Authority
GB
United Kingdom
Prior art keywords
acid
disulphonic
aminonaphthol
benzidine
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
GB208334A
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.)
ALEXANDER MACMASTER
Morton International Ltd
Original Assignee
ALEXANDER MACMASTER
Williams Hounslow 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 ALEXANDER MACMASTER, Williams Hounslow Ltd filed Critical ALEXANDER MACMASTER
Priority to GB208334A priority Critical patent/GB432355A/en
Publication of GB432355A publication Critical patent/GB432355A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling

Landscapes

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

Abstract

Dis-, tris-, and tetrakisazo dyes are made from tetrazotized benzidine-2 : 2<1>-disulphonic acid or the tetrazo compound of the tolidine disulphonic obtained from o-nitrotoluene by sulphonation, alkaline reduction and intramolecular change of the hydrazo compound (1) by coupling with 2 mols. of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol or with 1 mol. of such an acid and 1 mol. of another such aminonaphthol sulphonic acid; (2) by coupling with 1 mol. of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol and 1 mol. of a - or b -naphthol or a sulphonic acid thereof, resorcinol, resorcylic acid 1 : 3 : 4, b -oxynaphthoic acid, salicylic acid, o-cresotinic acid, phenol, cresols, phenylpyrazolones, or an aminophenolic or amino component, e.g. m-phenylene or m-tolulylene diamine; (3) by coupling with 2 mols. of an acyl derivative of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol containing an acyl group derived from a fatty acid of eight or less carbon atoms or from a substituted or unsubstituted aromatic acid; (4) by coupling with 1 mol. of an acylaminonaphthol sulphonic acid as defined in (3) and 1 mol. of the second components stated in (2); (5) by coupling with 2 mols. of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol one or both of which have been previously coupled with a diazo compound, or alternatively by coupling the tetrazo compound with 2 mols. of the said aminonaphthol sulpho acid and subsequently coupling with 1 or 2 mols. of the diazo compound; (6) by coupling with one molecule of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol which is previously or subsequently coupled with a diazo compound, the second diazo group of the tetrazo compound being coupled with one of the second components in (2); (7) by coupling in alkaline solution with either one or two mols. of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol, the product rediazotized and coupled with 2 mols. of one of the second components of (2); (8) by coupling with either 1 or 2 mols. of a middle component other than 2 : 5- or 1 : 8-aminonaphthol sulphonic acid, the product rediazotized and coupled with 2 mols. of a sulphonic acid of 2 : 5- or 1 : 8-aminonaphthol. They are suitable for leather dyeing. Suitable acids specified are J, H and K acids. In examples, the following dyes are described: (1) and (4) benzidine-2 : 2<1>-disulphonic acid \sQ (alkaline) H acid or J acid; (2) and (8) benzidine-2 : 2<1>-disulphonic acid or the tolidine disulphonic acid \sQ (alkaline) acetyl H acid; (3) 1-phenyl-3-methyl-5-pyrazolone \sM benzidine-2 : 2<1>-disulphonic acid --> (acid) H acid \sM (alkaline) p-nitraniline; (5) and (9) benzidine-2 : 2<1>-disulphonic acid or the tolidine-disulphonic acid \sQ (alkaline) H acid \sx (acid) p-nitraniline; (6) H acid \sM (acid) benzidine-2 : 2<1>-disulphonic acid --> (acid) H acid \sM (alkaline) aniline or b -naphthylamine; (7) H acid \sM (alkaline) benzidine-2 : 2<1>-disulphonic acid --> p-xylidine --> (alkaline) H acid. Samples have been furnished under Sect. 2 (5) of the following dyestuffs: (1) and (2) acetyl H acid \sM benzidine-2 : 2<1>-disulphonic acid --> resorcin or b -naphthol; (3) benzidine-2 : 2<1>-disulphonic acid \sQ H acid \sQ a -naphthylamine; (4) benzidine-2 : 2<1>-disulphonic acid \sQ J acid \sQ H acid. The Provisional Specification refers to the use of aminonaphthol sulphonic acids and amino, phenolic and aminophenolic components in general.
GB208334A 1934-01-20 1934-01-20 New azo dyestuffs and their application in leather dyeing Expired GB432355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB208334A GB432355A (en) 1934-01-20 1934-01-20 New azo dyestuffs and their application in leather dyeing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB208334A GB432355A (en) 1934-01-20 1934-01-20 New azo dyestuffs and their application in leather dyeing

Publications (1)

Publication Number Publication Date
GB432355A true GB432355A (en) 1935-07-22

Family

ID=9733275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB208334A Expired GB432355A (en) 1934-01-20 1934-01-20 New azo dyestuffs and their application in leather dyeing

Country Status (1)

Country Link
GB (1) GB432355A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739908C (en) * 1938-03-09 1943-10-15 Manufactures De Prod Chim Du N Process for the preparation of trisazo dyes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739908C (en) * 1938-03-09 1943-10-15 Manufactures De Prod Chim Du N Process for the preparation of trisazo dyes

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