GB706157A - Manufacture of new trisazo-dyestuffs - Google Patents
Manufacture of new trisazo-dyestuffsInfo
- Publication number
- GB706157A GB706157A GB13054/52A GB1305452A GB706157A GB 706157 A GB706157 A GB 706157A GB 13054/52 A GB13054/52 A GB 13054/52A GB 1305452 A GB1305452 A GB 1305452A GB 706157 A GB706157 A GB 706157A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- acids
- disulphonic
- naphthol
- alkaline
- 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
- C09B35/38—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
The invention comprises trisazo dyes of the general formula <FORM:0706157/IV(c)/1> (wherein R1 represents an aromatic residue of the benzene series and R2 the residue of a hydroxynaphthalene, R1 and R2 each containing at least one and together at least three sulphonic acid groups and R2 being free from further substituents), and the manufacture thereof by coupling a naphtholsulphonic acid R2H with a diazoazo compound of the general formula <FORM:0706157/IV(c)/2> (wherein X represents a diazotized amino group), which is obtainable by one-sided coupling of tetrazotized benzidine with 1-amino-8-naphthol-3 : 6-disulphonic acid in an acid medium, followed by alkaline coupling of the product with the diazo compound of an amine R1-NH2. The products dye chrome-tanned leather in navy blue tints. Specified components, some of which are used in examples (1)-(3) are: amines R1-NH2: aniline-2-, -3- and -4-sulphonic acids and -3 : 5- and -2 : 5-disulphonic acids; naptholsulphonic acids R2H: 1-naphthol-4- and -5-sulphonic acids and -3 : 6-, -3-8- and -4 : 8-disulphonic acids, and 2-naphthol-6- and -7-sulphonic acids and -3 : 6- and -3 : 8- disulphonic acids. In example (4), velour leather is dyed reddish navy blue with the dyestuff sulphanilic acid --> (alkaline) H-acid (acid) \sM benzidine --> (alkaline) 2-naphthol -3 : 6-disulphonic acid from an aqueous bath to which formic acid is added in the later stages.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH706157X | 1951-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB706157A true GB706157A (en) | 1954-03-24 |
Family
ID=4530391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13054/52A Expired GB706157A (en) | 1951-06-25 | 1952-05-22 | Manufacture of new trisazo-dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB706157A (en) |
-
1952
- 1952-05-22 GB GB13054/52A patent/GB706157A/en not_active Expired
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