GB490941A - Manufacture of azo-dyestuffs - Google Patents
Manufacture of azo-dyestuffsInfo
- Publication number
- GB490941A GB490941A GB541537A GB541537A GB490941A GB 490941 A GB490941 A GB 490941A GB 541537 A GB541537 A GB 541537A GB 541537 A GB541537 A GB 541537A GB 490941 A GB490941 A GB 490941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkoxy
- diethoxy
- halogen
- alkyl
- substance
- 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
Landscapes
- Coloring (AREA)
Abstract
Azo dyes, insoluble in water, are made in substance, on a substratum or on the fibre by coupling the diazo compound of an amine of the formula <FORM:0490941/IV/1> where X = alkyl, alkoxy or halogen, with an arylide of 2 : 3-hydroxynaphthoic acid. In examples: (1)-(2) bleached cotton piece goods are impregnated with the anilide or o-toluidide and printed with a paste containing 2 : 5-diethoxy- or dimethoxy-51-methyl-21 : 41-dinitrodiphenylamine - 4 - diazonium chloride, dried and passed through a hot sodium carbonate solution (blue black); (3) bleached cotton piece goods are padded with the a -naphthalide, passed through a solution of 2 : 5-diethoxy-21 : 41 - dinitro - 51 - chlorodiphenyl amine-4-diazonium chloride in formic acid and steamed (greenish blue black); (4) the diazo compound of (3) is coupled in substance with the 4-chloro-2-methylanilide. A table of further combinations is given. According to the Provisional Specification diazo compounds of amines of the formula <FORM:0490941/IV/2> wherein X and Y, which may be the same or different, stand for alkoxy, aryloxy or aralkyloxy and Z = alkyl, alkoxy, halogen or hydrogen are used. Specifications 329,960, [Class 2 (iii)], and 377,207 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB541537A GB490941A (en) | 1937-02-23 | 1937-02-23 | Manufacture of azo-dyestuffs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB541537A GB490941A (en) | 1937-02-23 | 1937-02-23 | Manufacture of azo-dyestuffs |
Publications (1)
Publication Number | Publication Date |
---|---|
GB490941A true GB490941A (en) | 1938-08-23 |
Family
ID=9795743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB541537A Expired GB490941A (en) | 1937-02-23 | 1937-02-23 | Manufacture of azo-dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB490941A (en) |
-
1937
- 1937-02-23 GB GB541537A patent/GB490941A/en not_active Expired
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