GB275258A - Manufacture of azo-dyestuffs - Google Patents
Manufacture of azo-dyestuffsInfo
- Publication number
- GB275258A GB275258A GB20194/27A GB2019427A GB275258A GB 275258 A GB275258 A GB 275258A GB 20194/27 A GB20194/27 A GB 20194/27A GB 2019427 A GB2019427 A GB 2019427A GB 275258 A GB275258 A GB 275258A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- aminonaphthol
- ester
- action
- coupling
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
- C09B29/28—Amino naphthols
- C09B29/30—Amino naphtholsulfonic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
275,258. I. G. Farbenindustrie Akt.- Ges. July 29, 1926, [Convention date]. Samples furnished. Aminonaphthol derivatives; azo dyes. - Azo dyes are made by coupling diazo compounds with aminonaphthol derivatives of the general formula HO-R-NXY, where R is a naphthalene nucleus, which may contain substituents, e.g. sulpho groups, X is hydrogen, alkyl, aryl, or aralkyl, and Y is an esterified carboxyl group, e. g. -COOC2H5. Such compounds are obtained hy the action of a halogenated acid ester on an aminonaphthol, advantageously in the presence of an acid-binding agent. In examples, (1) diazotized p-aminomethylacetanilide is coupled with the product obtained by the action of chloroformic ethyl ester on the sodium salt of 2 : 8 : 6- aminonaphtholsulphonic acid, and (2) diazotized m-xylidine is coupled with the product obtained by the action of chloroformic ethyl ester on the sodium salt of H-acid; the product dyes wool in an even bluish-red tint, fast to light. The products obtained by the action of chlorformic ester on 2-ethylamino-8-naphthol-6-sulphonic acid and 2-amino-8-naphthol are also specified as coupling components. If anthranilic acid or an o-aminophenol has been used as diazo component, the dye stuffs may be after-chromed in known manner. The aminonaphthol derivatives may also be used for the manufacture of disazo and polyazo dyes. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of coupling components of the above formula in which Y is the residue of any carboxylic acid ester, e.g.- CH2-COOC2H5, and states that when products such as that from chloracetic ester and 1: 8- aminonaphthol-4-sulphonic acid are used the coupling may occur, according to the conditions, in o-position to the amino group or to the oxy group; in the latter case the dyeings may be afterchromed. o-Aminonaphthols are also specified as diazo components suitable for producing dyeings adapted to be after-chromed. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE275258X | 1926-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB275258A true GB275258A (en) | 1928-12-31 |
Family
ID=6024578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20194/27A Expired GB275258A (en) | 1926-07-29 | 1927-07-29 | Manufacture of azo-dyestuffs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB275258A (en) |
-
1927
- 1927-07-29 GB GB20194/27A patent/GB275258A/en not_active Expired
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