DE386754C - Process for the preparation of water-insoluble azo dyes - Google Patents

Process for the preparation of water-insoluble azo dyes

Info

Publication number
DE386754C
DE386754C DEC32107D DEC0032107D DE386754C DE 386754 C DE386754 C DE 386754C DE C32107 D DEC32107 D DE C32107D DE C0032107 D DEC0032107 D DE C0032107D DE 386754 C DE386754 C DE 386754C
Authority
DE
Germany
Prior art keywords
water
preparation
azo dyes
parts
insoluble azo
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
Application number
DEC32107D
Other languages
German (de)
Inventor
Dr August Leopold Laska
Dr Arthur Zitscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GRIESHEIM ELEKTRON CHEM FAB
Chemische Fabrik Griesheim Elektron
Original Assignee
GRIESHEIM ELEKTRON CHEM FAB
Chemische Fabrik Griesheim Elektron
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GRIESHEIM ELEKTRON CHEM FAB, Chemische Fabrik Griesheim Elektron filed Critical GRIESHEIM ELEKTRON CHEM FAB
Priority to DEC32107D priority Critical patent/DE386754C/en
Application granted granted Critical
Publication of DE386754C publication Critical patent/DE386754C/en
Expired legal-status Critical Current

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
    • C09B31/02—Disazo dyes

Description

Verfahren zur Darstellung von wasserunlöslichen Azofarbstoffen. Zusatz zum Patent 3839o3# In dem Patent 3839o3 ist ein Verfahren zur Erzeugung echter schwarzer Färbungen auf der Faser beschrieben, welches darin besteht, daß man die mit 2 # 3-Oxynaphthoesäurearyliden imprägnierten Waren mit Diazoverbindungen von Aryl-azo-=-naphthylaminen, welche keine Sulfogruppen enthalten, behandelt.Process for the preparation of water-insoluble azo dyes. additive to the patent 3839o3 # In the patent 3839o3 there is a method for the production of true black Colorations on the fiber described, which consists in that one with 2 # 3-oxynaphthoic acid arylidene impregnated with diazo compounds of aryl-azo - = - naphthylamines, which do not contain sulfo groups.

Es wurde nun gefunden, daß man bei der Kuppelung von Aryl-azo-x-naphthylaminen, welche keine Sulfogruppen enthalten, mit 2 - 3-Oxynaphthoesäurearyliden in Substanz zu schwarzen Pigmentfarbstoffen gelangt, welche zur Herstellung wertvoller Lacke dienen können und besonders zur Bereitung von Leimfarben geeignet sind. Als solche zeichnen sie sich durch Tiefe und einen warmen, samtartigen Ton aus, wie er bisher nur unter Zuhilfenahme von Blauholzschwarz erreicht werden konnte. Ein besonderer Vorzug dieser neuen Lackfarbstoffe ist auch ihre völlige Alkaliechtheit, welche die Verwendung selbst alkalischer Leime bei der Herstellung der Leimfarben gestattet.It has now been found that when coupling aryl-azo-x-naphthylamines, which do not contain sulfo groups, with 2 - 3-Oxynaphthoesäurearyliden in substance leads to black pigments, which are used in the production of valuable paints can serve and are particularly suitable for the preparation of glue paints. As such they are characterized by depth and a warm, velvety tone, as he has before could only be achieved with the help of blue wood black. A special Another advantage of these new lacquer dyes is their complete alkali fastness, which the use of even alkaline glues in the manufacture of the glue colors is permitted.

Beispiel: 30,5 Teile o-Äthoxy-m-toluol azo-r-naphtliylamin werden in qo Teilen Salzsäure 2o° B6 und etwa. q.5oo Teilen Wasser gelöst und mit 6,9 Teilen Natriumnitrit in der üblichen Weise dianotiert. Die so gebildete Diazoverbindung wird durch Filtrieren von geringen Verunreinigungen befreit. 29,3 Teile 2 - 3-Oxynaphtoesäure-p-anisidid werden in 2o Teilen Natronlauge 36° B6 und Zoo Teilen Wasser unter Zusatz einer wässerigen Lösung von 1.3 Teilen Natriumacetat und 2 Teilen Türkischrotöl in der Wärme gelöst, mit Eis auf etwa ro° abgekühlt und filtriert. Diese Lösung läßt man unter Rühren bei ro bis 15' in die Diazolösung einlaufen. Nach Beendigung der Kupplung wird der entstandene Farbstoff abfiltriert und ausgewaschen. Er bildet nach dem Trocknen ein blauschwarzes Pulver, das sich in konzentrierter Schwefelsäure mit grüner Färbe löst. Beim Eingießen der schwefelsauren Lösung in Wasser wird er in blauschwarzen Flocken ausgefällt. Zur Lackdarstellung verwendet man den Farbstoff vorteilhaft in Pastenform. Die in der üblichen Weise daraus hergestellten Lacke liefern tiefe, schwarze Leimfarben von samtartigem Aussehen.Example: 30.5 parts of o-ethoxy-m-toluene azo-r-naphthylamine in qo parts of hydrochloric acid 20 ° B6 and about. 500 parts of water dissolved and dianotized with 6.9 parts of sodium nitrite in the usual way. The diazo compound thus formed is freed from minor impurities by filtration. 29.3 parts of 2-3-oxynaphthoic acid-p-anisidide are dissolved in 20 parts of sodium hydroxide solution 36 ° B6 and zoo parts of water with the addition of an aqueous solution of 1.3 parts of sodium acetate and 2 parts of Turkish red oil, and the mixture is cooled to about ro ° with ice and filtered. This solution is allowed to run into the diazo solution at ro to 15 'with stirring. After the coupling has ended, the resulting dye is filtered off and washed out. After drying, it forms a blue-black powder that dissolves in concentrated sulfuric acid with a green color. When the sulfuric acid solution is poured into water, it is precipitated in blue-black flakes. The dye is advantageously used in paste form to produce varnish. The varnishes produced from it in the usual way provide deep, black glue colors with a velvety appearance.

Mit anderen Aryl-azo-r-naphthylaminen und 2 - 3-Oxynaphthoesäurearyliden wird die Farbstoffbildung in entsprechender Weise durchgeführt.With other aryl-azo-r-naphthylamines and 2-3-oxynaphthoic acid arylides the dye formation is carried out in a corresponding manner.

Claims (1)

PATENTANSPRUCH: Abänderung des durch Hauptpatent 3839o3 geschützten Verfahrens zur Erzeugung echter schwarzer Färbungen auf der Faser, darin bestehend, daß man die Kupplung vonAryl-azo-Z-naphthylaminen, welche keine Sulfogruppen enthalten, mit 2 # 3-Oxynaphthoesäurearyliden hier in Substanz, gegebenenfalls in Gegenwart einer für die Farblackdarstellung geeigneten Grundlage, vornimmt. PATENT CLAIM: Modification of the process, protected by the main patent 3839o3, for the production of true black colorations on the fiber, consisting in the coupling of aryl-azo-Z-naphthylamines, which contain no sulfo groups, with 2 # 3-oxynaphthoic acid arylides here in substance, optionally in Presence of a suitable base for the color varnish display.
DEC32107D 1922-05-14 1922-05-14 Process for the preparation of water-insoluble azo dyes Expired DE386754C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC32107D DE386754C (en) 1922-05-14 1922-05-14 Process for the preparation of water-insoluble azo dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC32107D DE386754C (en) 1922-05-14 1922-05-14 Process for the preparation of water-insoluble azo dyes

Publications (1)

Publication Number Publication Date
DE386754C true DE386754C (en) 1923-12-15

Family

ID=7020143

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC32107D Expired DE386754C (en) 1922-05-14 1922-05-14 Process for the preparation of water-insoluble azo dyes

Country Status (1)

Country Link
DE (1) DE386754C (en)

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