AT35657B - Process for the preparation of halogen-containing vat dyes of the thioindigo series. - Google Patents

Process for the preparation of halogen-containing vat dyes of the thioindigo series.

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Publication number
AT35657B
AT35657B AT35657DA AT35657B AT 35657 B AT35657 B AT 35657B AT 35657D A AT35657D A AT 35657DA AT 35657 B AT35657 B AT 35657B
Authority
AT
Austria
Prior art keywords
halogen
preparation
vat dyes
thioindigo series
containing vat
Prior art date
Application number
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German (de)
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Chem Ind Basel
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Publication date
Application filed by Chem Ind Basel filed Critical Chem Ind Basel
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Publication of AT35657B publication Critical patent/AT35657B/en

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Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



   Durch das Patent Nr. 32206 ist ein Verfahren zur Darstellung   halogensubstituierter   Küpenfarbstoffe der Thioindigogruppe geschützt, welches darin besteht, dass man die durch Kondensation von Salicylthioessigsäure bzw. 3-Oxy-1-thionaphten mit Isatin bzw. dessen Homologen und Substitutionsprodukten erhältlichen Kondensationsprodukte bei Gegenwart eines   indifferenten Lösungsmittels   mit Halogenen behandelt. Es wurde nun gefunden, dass sich auch der unter dem Namen ,,Thionindigorot" bekannte Farbstoff (dargestellt z. B. gemäss dem Verfahren der franz.

   Patentschrift Nr. 362876) durch Behandlung mit Halogenen unter gewissen Bedingungen in neue wertvolle Farbstoff überführen lässt, welche verglichen mit   Thionidigorot, erheblich gesteigerte Affinität zur Baumwollfaser und bessere Waschechtheit   aufweisen. 
 EMI1.2 
 sich selbst überlassen und hierauf noch etwa 3 Std. im   Ölbade   unter Rückfluss auf   130     bis 1350 C. (Ötbadtemperatur)   erhitzt. Nach dem Erkalten wird filtriert,   mit Alkoho) ge-   waschen und getrocknet.

   Das in dieser Weise erhaltene Bromderivat bildet ein   grauvio ! ettes   Kristallpulver, welches beim Behandeln mit alkalischen Reduktionsmitteln eine hellgelbe Küpe liefert, aus welcher Baumwolle in lebhaften bordeauxroten Tönen von vorzüglicher Wasch-, Licht- und Chlorechtheit angefärbt wird. In konzentrierter Schwefelsäure löst sich der neume Farbstoff mit blaustichig grüner Farbe ; auf Zusatz von Wasser erfolgt Ausscheidung   von rotvioietten Flocken.   In Benzol ist er auch in der   Wärme   nur schwer löslich mit violettroter Farbe und schwacher gelber Fluorescenz, leicht dagegen in   heissem   NitrobeznolmithimberroterFarbeundschwachgelberFluorescenz. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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   A process for the preparation of halogen-substituted vat dyes of the thioindigo group is protected by patent no Indifferent solvent treated with halogens. It has now been found that the dye known under the name "Thionindigo Red" (represented, for example, according to the method of French

   Patent No. 362876) can be converted into new valuable dyes by treatment with halogens under certain conditions, which compared to thionidigo red, have a considerably increased affinity for cotton fibers and better wash fastness.
 EMI1.2
 Left to themselves and then heated for about 3 hours in an oil bath under reflux to 130 to 1350 ° C. (oil bath temperature). After cooling, it is filtered, washed with alcohol and dried.

   The bromine derivative obtained in this way forms a greyvio! ettes crystal powder which, when treated with alkaline reducing agents, produces a light yellow vat, from which cotton is dyed in lively burgundy shades of excellent washing, light and chlorine fastness. The new dye dissolves in concentrated sulfuric acid with a bluish green color; Upon addition of water, red-violet flakes are excreted. In benzene, even when heated, it is only sparingly soluble with violet-red color and weak yellow fluorescence, whereas it is slightly soluble in hot nitrobenznol with dimer-red color and weak yellow fluorescence.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT35657D 1907-03-11 1907-03-11 Process for the preparation of halogen-containing vat dyes of the thioindigo series. AT35657B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT35657T 1907-03-11

Publications (1)

Publication Number Publication Date
AT35657B true AT35657B (en) 1908-12-28

Family

ID=3552277

Family Applications (1)

Application Number Title Priority Date Filing Date
AT35657D AT35657B (en) 1907-03-11 1907-03-11 Process for the preparation of halogen-containing vat dyes of the thioindigo series.

Country Status (1)

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AT (1) AT35657B (en)

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