GB705850A - Manufacture of trisazo-dyestuffs - Google Patents
Manufacture of trisazo-dyestuffsInfo
- Publication number
- GB705850A GB705850A GB11384/51A GB1138451A GB705850A GB 705850 A GB705850 A GB 705850A GB 11384/51 A GB11384/51 A GB 11384/51A GB 1138451 A GB1138451 A GB 1138451A GB 705850 A GB705850 A GB 705850A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dyestuffs
- hydroxy
- specifications
- amino
- substituted
- 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
- C09B35/40—Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
The following N-substituted amides of 3-amino-4-hydroxybenzoic acid may be obtained by the process of Specification 606,872:-N-m-chlorophenyl, N-o-methoxyphenyl, N-p-ethoxyphenyl, N-cyclohexyl and N-methyl-N-phenyl, in addition to those specified therein. The anilide of 4-amino-3-hydroxybenzoic acid can be made similarly. Specifications 455,274, 532,261, 587,110, 619,969 and 649,656 also are referred to.ALSO:The invention comprises trisazo dyestuffs of the formula <FORM:0705850/IV(c)/1> where R1 is the residue of an aromatic m-dihydroxy compound with the hydroxy groups oto the azo linkages and containing at most two fused 6-membered rings, R2 is a salicylic acid residue (which may be substituted) attached pto the hydroxy group, and X is -CO-R attached pto the hydroxy or the azo group, R being alkyl, aryl, <FORM:0705850/IV(c)/2> or <FORM:0705850/IV(c)/3> The dyestuffs are preferably free from sulphonic acid groups. They are made by coupling an aromatic m-dihydroxy compound in either order with (a) a diazotized X-substituted o-aminophenol, and (b) the diazo intermediate from tetrazotized benzidine and a salicylic acid. The dyestuffs are suitable for dyeing and printing wool, silk, leather, cotton, linen and regenerated cellulose. They may be metallized on the fibre or in the dyebath, e.g. by the methods of Specifications 455,274 and 619,969. In examples, (1) tetrazotized benzidine is coupled with one mol of salicylic acid and one mol of the monoazo dyestuff 3-amino-4-hydroxy-benzanilide --> resorcinol or 1 : 3-dihydroxynaphthalene; (2) cotton is dyed brown with the product of (1), followed by after-treatment with sodium copper tartrate. Other suitable diazo components are specified. Specifications 532,261, 587,110, 606,872 and 649,656 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH705850X | 1950-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB705850A true GB705850A (en) | 1954-03-17 |
Family
ID=4530368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11384/51A Expired GB705850A (en) | 1950-05-16 | 1951-05-15 | Manufacture of trisazo-dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB705850A (en) |
-
1951
- 1951-05-15 GB GB11384/51A patent/GB705850A/en not_active Expired
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