GB708663A - Manufacture of new trisazo dyestuffs - Google Patents
Manufacture of new trisazo dyestuffsInfo
- Publication number
- GB708663A GB708663A GB23268/51A GB2326851A GB708663A GB 708663 A GB708663 A GB 708663A GB 23268/51 A GB23268/51 A GB 23268/51A GB 2326851 A GB2326851 A GB 2326851A GB 708663 A GB708663 A GB 708663A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coupling
- acid
- coppered
- diazotizing
- naphthylamine
- 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
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
- C09B31/20—Trisazo dyes from a coupling component"D" containing a directive hydroxyl group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
The invention comprises trisazo dyestuffs of the formula <FORM:0708663/IV(c)/1> where R1 and R2 are residues of middle component of the benzene series and R3 is the residue of a benzene-o-hydroxycarboxylic acid; the attachments shown to the ring I are m- or p-. These are made by coupling diazotized 2-naphthylamine-4:8-disulphonic acid with HR1 NH2, re-diazotizing, coupling with HR2 NH2, condensing the product with m- or p-nitrobenzoyl chloride, reducing the nitro group to amino, diazotizing and coupling with salicylic acid or a substitution derivative thereof. The last coupling may be effected in the presence of pyridine. Preferably no carboxylic acid group is present other than that in R3. The products are suitable for dyeing and printing wool, silk, leather, cotton, linen and regenerated cellulose. They can be metallized (especially coppered) in the dyebath or on the fibre, e.g. by the process of Specifications 455,274 or 619,969. In examples, (1) the dyestuff 2 - naphthylamine - 4 : 8 - disulphonic acid --> m - toluidine --> m-toluidine (p-nitrobenzoylated and reduced) is diazotized and coupled with salicylic acid; (2) as in (1) using cresidine as first coupling component; (3) cotton is dyed with the product of (2) and coppered. Other suitable components are listed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH708663X | 1950-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB708663A true GB708663A (en) | 1954-05-05 |
Family
ID=4530582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23268/51A Expired GB708663A (en) | 1950-11-02 | 1951-10-05 | Manufacture of new trisazo dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB708663A (en) |
-
1951
- 1951-10-05 GB GB23268/51A patent/GB708663A/en not_active Expired
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