CH205530A - Process for the preparation of a water-soluble azo dye. - Google Patents

Process for the preparation of a water-soluble azo dye.

Info

Publication number
CH205530A
CH205530A CH205530DA CH205530A CH 205530 A CH205530 A CH 205530A CH 205530D A CH205530D A CH 205530DA CH 205530 A CH205530 A CH 205530A
Authority
CH
Switzerland
Prior art keywords
water
soluble azo
dye
azo dye
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH205530A publication Critical patent/CH205530A/en

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines wasserlöslichen     Azofarbstoffes.       Es wurde gefunden, dass man wertvolle  wasserlösliche     Azofarbstoffe    erhält; wenn man  beliebige     Diazoverbindungen    mit     1-Amino-7-          ogynaphtbalinen    von der allgemeinen Zusam  mensetzung  
EMI0001.0006     
    worin der     Naphthalinkern    noch eine     Sulfon-          säuregruppe    enthalten kann, vereinigt.  



  Die erhaltenen     Farbstoffe    besitzen die  wertvolle Eigenschaft, Leder in Tönen, die  sich von violett über blau nach schwarz er  strecken, teils ein-, teils durchzufärben. So  weit zur Herstellung der Farbstoffe     Diazover-          bindungen    der     Benzolreihe    zur Verwendung  gelangen und die fertig gebildeten Farbstoffe  ausser der     Alkyl-S0sH-Gruppe    keine weitere       Sulfonsäuregruppe    enthalten, eignen sie sich  insbesondere zum Färben von Wolle aus    saurem Bade unter Kochtemperatur bei ge  nügendem bis sehr gutem Ausziehen der  Färbebäder.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines wasser  löslichen     Azofarbstoffes,    welches dadurch ge  kennzeichnet ist, dass man     diazotiertes        Amino-          benzol    in alkalischem Medium mit     1-Sulf-          äthylamino-7-ogynaphthalin    kuppelt.  



  <I>Beispiel:</I>  Zu einer aus 253 Gewichtsteilen     1-Sulf-          äthylamino-7-ogynaphthalin    (erhältlich durch  Kondensation von     1.-Amino-7-ogynaphthalin     mit     chloräthansulfonsaurem    Natrium in Gegen  wart eines säurebindenden Mittels), Wasser  und 212 Gewichtsteilen     Natriumcarbonat    er  haltenen Lösung läuft eine in üblicher Weise  aus 93 Gewichtsteilen     Aminobenzol    erhaltene       Diazolösung.    Nach beendeter Kupplung wird  der Farbstoff in üblicher Weise aus der Lö  sung     ausgesalzen,    abgesaugt und getrocknet.

        Er stellt ein schwarzes Pulver dar, das  sich mit dunkelweinroter Farbe in Wasser  löst und Leder in     grauschwarzen    Tönen ein  färbt.     Ferner    zieht er unter Kochtemperatur  auf Wolle aus saurem Bade unter guter Aus  nutzung des Färbebades.



  Process for the preparation of a water-soluble azo dye. It has been found that valuable water-soluble azo dyes are obtained; if you have any diazo compounds with 1-amino-7-ogynaphtbalinen of the general composition
EMI0001.0006
    in which the naphthalene nucleus can also contain a sulfonic acid group, combined.



  The dyestuffs obtained have the valuable property of dyeing leather in shades that range from violet to blue to black, partly one-through, partly through-dyeing. To the extent that diazo compounds of the benzene series are used to produce the dyestuffs and the finished dyestuffs contain no other sulfonic acid group apart from the alkyl-SOsH group, they are particularly suitable for dyeing wool from an acid bath at boiling temperature with sufficient to very good Taking off the dye baths.



  The present patent relates to a process for the production of a water-soluble azo dye, which is characterized in that diazotized amino benzene is coupled with 1-sulfethylamino-7-ogynaphthalene in an alkaline medium.



  <I> Example: </I> For one of 253 parts by weight of 1-sulfethylamino-7-ogynaphthalene (obtainable by condensation of 1.-amino-7-ogynaphthalene with sodium chloroethanesulfonic acid in the presence of an acid-binding agent), water and 212 Parts by weight of sodium carbonate he obtained solution runs a diazo solution obtained in a conventional manner from 93 parts by weight of aminobenzene. After the coupling has ended, the dye is salted out of the solution in the customary manner, filtered off with suction and dried.

        It is a black powder that dissolves in water with a dark wine-red color and colors leather in gray-black tones. He also pulls at boiling temperature on wool from an acid bath with good use of the dyebath.

Claims (1)

PATEINTTAN <B>SPRUCH</B> Verfahren zur Herstellung eines wasser löslichen Azofarbstoffes, dadurch gekennzeich net, dass man dianotiertes Aminobenzol in alkalischem Medium mit 1-Sulfäthylamirio-7- o%ynapllthalrn kuppelt. Der so erhaltene Farbstoff stellt ein schwar zes Pulver dar, das sich mit dunkelweinroter Farbe in Wasser löst und Leder in grau schwarzen Tönen einfärbt. Ferner zieht er unter Kochtemperatur auf Wolle aus saurem Bade unter guter Ausnutzung des Färbebades. PATEINTTAN <B> SPRUCH </B> Process for the production of a water-soluble azo dye, characterized in that dianotated aminobenzene is coupled in an alkaline medium with 1-sulfäthylamirio-7% ynapllthalrn. The dye thus obtained is a black powder that dissolves in water with a dark wine-red color and dyes leather in gray-black tones. He also draws wool from an acid bath at boiling temperature, making good use of the dye bath.
CH205530D 1937-03-23 1938-03-16 Process for the preparation of a water-soluble azo dye. CH205530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE205530X 1937-03-23

Publications (1)

Publication Number Publication Date
CH205530A true CH205530A (en) 1939-06-30

Family

ID=5787710

Family Applications (1)

Application Number Title Priority Date Filing Date
CH205530D CH205530A (en) 1937-03-23 1938-03-16 Process for the preparation of a water-soluble azo dye.

Country Status (1)

Country Link
CH (1) CH205530A (en)

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