GB481070A - Azo-dyestuffs for leather - Google Patents
Azo-dyestuffs for leatherInfo
- Publication number
- GB481070A GB481070A GB1497337A GB1497337A GB481070A GB 481070 A GB481070 A GB 481070A GB 1497337 A GB1497337 A GB 1497337A GB 1497337 A GB1497337 A GB 1497337A GB 481070 A GB481070 A GB 481070A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- mol
- coupling
- leather
- aminophenol
- 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
- C09B35/64—Higher polyazo dyes, e.g. of the types
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Hexakisazo dyes of the type <FORM:0481070/IV/1> in which A = an unsulphonated p-diamine of the diphenyl series, B = H acid, C = a sulphonated monamine and D = an aryl-m-aminophenol of the type <FORM:0481070/IV/2> which may or may not carry a methyl or methoxy group in the non-phenolic nucleus in o- or p-position to NH, or an amino group in m-position to NH, but is unsubstituted in the phenolic nucleus are made by first coupling in mineral acid solution the tetrazotized diamine A (1 mol.) with H acid (1 mol.), then coupling the intermediate product in alkaline solution with the diazotized amine C (1 mol.) and finally coupling in alkaline solution 2 mols. of the product thus formed with 1 mol. of the m-aminophenol D. They dye and stain leather in black shades. In an example the components specified are benzidine, H acid, sulphanilic acid and m-hydroxydiphenylamine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1497337A GB481070A (en) | 1937-05-29 | 1937-05-29 | Azo-dyestuffs for leather |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1497337A GB481070A (en) | 1937-05-29 | 1937-05-29 | Azo-dyestuffs for leather |
Publications (1)
Publication Number | Publication Date |
---|---|
GB481070A true GB481070A (en) | 1938-03-04 |
Family
ID=10050830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1497337A Expired GB481070A (en) | 1937-05-29 | 1937-05-29 | Azo-dyestuffs for leather |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB481070A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE933582C (en) * | 1953-03-06 | 1955-09-29 | Hoechst Ag | Process for the preparation of polyazo dyes |
-
1937
- 1937-05-29 GB GB1497337A patent/GB481070A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE933582C (en) * | 1953-03-06 | 1955-09-29 | Hoechst Ag | Process for the preparation of polyazo dyes |
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