DE883020C - Process for the preparation of a new monoazo black chromable dye - Google Patents

Process for the preparation of a new monoazo black chromable dye

Info

Publication number
DE883020C
DE883020C DEF7164A DEF0007164A DE883020C DE 883020 C DE883020 C DE 883020C DE F7164 A DEF7164 A DE F7164A DE F0007164 A DEF0007164 A DE F0007164A DE 883020 C DE883020 C DE 883020C
Authority
DE
Germany
Prior art keywords
black
dye
chromable
preparation
new
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
DEF7164A
Other languages
German (de)
Inventor
Hans Dr Raab
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Priority to DEF7164A priority Critical patent/DE883020C/en
Application granted granted Critical
Publication of DE883020C publication Critical patent/DE883020C/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Description

Verfahren zur Herstellung eines neuen schwarzen chromierbaren Monoazofarbstoffs Es wurde gefunden, daß man einen wertvollen neuen chromierbaren schwarzen Monoazofarbstoff erhält, wenn man diazotiertes i-Amino-2-oxy-3, 5-dinitrobenzol mit i; 5-Dioxynaphthal.in-3, 7-disulfonsäure kuppelt. Der neue Farbstoff färbt Wolle aus saurem Biad in violettschwarzen Tönen, die beim Nachchromieren in ein tiefes Schwarz übergehen; die Färbungen besitzen hervorragende Echtheitseigenschaften. Gegenüber bekannten vergleichbaren Farbstoffen zeichnet sich der neue Farbstoff dadurch aus, daß er einerseits eine bessere Lichtechtheit aufweist und andererseits bessere Weißeffekte auf Baumwolle und Kunstseide ergibt. Beispiel 14,7 Gewichtsteile i-Amino-2-oxy-3, 5--dinitrobenzol werden mit roo Gewic.htstellen Wasser verrührt und nach Zusatz von 15 Gewichtsteilen Salzsäure ig° Be mit der entsprechenden Menge Natriumnitrit bei 2o bis z5° diazotiert. Nach vollendeter Diazotierung wird die Mischung auf o° abgekühlt und rasch in eine Lösung eingegossen, die aus 37 Gewichtsteilen i, 5-Dioxynaphtlral,in-3, 7-disulfonsäure durch Lösen ,unter Zusatz von 28 Gewichtsteilen ¢o! °/ofger Natronlauge in ioo Gewichtsteilen Wasser und Abkühlen auf o° durch Einwerfen von Eis erhalten wurde. Nach Zugabe der Dvazolösung bildet sich sehr schnell der violettschwarze Azofarbstoff. Er wird durch- Einrühren von 45 Gewichtsteilen Steinsalz gefällt, abgesiaugt und getrocknet. Der erhaltene Fastoff färbt Wolle aus saurem Bade in violettschwarzen Törnen, die beim Nachchromieren in ein tiefes Schwarz übergehen. Diese Färbungen zeichnen sich durch hervorragende NeBechtheiten und sehr gute Lichtechtheit aus. Acetat-, Viskose- und Kupferkunstseideeffekte werden weiß gelassen.Process for the preparation of a new monoazo black chromable dye It has been found that there is a valuable new chromable monoazo black dye obtained when diazotized i-amino-2-oxy-3, 5-dinitrobenzene with i; 5-dioxynaphthalene-3, 7-disulfonic acid couples. The new dye dyes wool from acidic Biad in purple-black Tones that turn into a deep black when re-chromed; have the colorations excellent fastness properties. Compared to known comparable dyes The new dye is distinguished by the fact that it has, on the one hand, better lightfastness and on the other hand gives better whitening effects on cotton and rayon. EXAMPLE 14.7 parts by weight of i-amino-2-oxy-3, 5 - dinitrobenzene are made with roo weight Stirred water and after addition of 15 parts by weight of hydrochloric acid ig ° Be with the corresponding Amount of sodium nitrite diazotized at 2o to z5 °. After the diazotization is complete the mixture cooled to o ° and quickly poured into a solution consisting of 37 parts by weight i, 5-Dioxynaphtlral, in-3, 7-disulfonic acid by dissolving, with the addition of 28 parts by weight ¢ o! % More sodium hydroxide solution in 100 parts by weight of water and cool to 0 ° Throw in obtained from ice. After adding the Dvazo solution, the purple black azo dye. It is made by stirring in 45 parts by weight of rock salt felled, vacuumed and dried. The obtained Fastoff dyes wool from acid Bathe in purple-black turns, which turn into a deep black when re-chrome-plated. These dyeings are characterized by excellent secondary fastness and very good light fastness the end. Acetate, viscose and copper rayon effects are left white.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen schwarzen chromierbaren Monoazofarbstoffs, dadurch gekennzeichnet, @daß man rliazotiertes -r-Amino-2-oxy-3, 5-dinitrob nzol mit z, 5-Dioxynaphthalin-3, 7-d@isulfonsäure kuppelt.PATENT CLAIM: Process for the production of a new black chromable Monoazo dye, characterized in that one rliazotized -r-amino-2-oxy-3, Coupling 5-dinitrobenzene with z, 5-dioxynaphthalene-3, 7-d @ isulphonic acid.
DEF7164A 1951-09-19 1951-09-19 Process for the preparation of a new monoazo black chromable dye Expired DE883020C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF7164A DE883020C (en) 1951-09-19 1951-09-19 Process for the preparation of a new monoazo black chromable dye

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF7164A DE883020C (en) 1951-09-19 1951-09-19 Process for the preparation of a new monoazo black chromable dye

Publications (1)

Publication Number Publication Date
DE883020C true DE883020C (en) 1953-07-13

Family

ID=7085310

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF7164A Expired DE883020C (en) 1951-09-19 1951-09-19 Process for the preparation of a new monoazo black chromable dye

Country Status (1)

Country Link
DE (1) DE883020C (en)

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