GB432355A - New azo dyestuffs and their application in leather dyeing - Google Patents
New azo dyestuffs and their application in leather dyeingInfo
- 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
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
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.
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)
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 |
-
1934
- 1934-01-20 GB GB208334A patent/GB432355A/en not_active Expired
Cited By (1)
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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