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CH136648A - Process for the preparation of a yellow monoazo dye. - Google Patents

Process for the preparation of a yellow monoazo dye.

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Publication number
CH136648A
CH136648A CH136648DA CH136648A CH 136648 A CH136648 A CH 136648A CH 136648D A CH136648D A CH 136648DA CH 136648 A CH136648 A CH 136648A
Authority
CH
Switzerland
Prior art keywords
yellow
preparation
monoazo dye
dye
yellow monoazo
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 CH136648A publication Critical patent/CH136648A/en

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Description

  

  Verfahren zur Darstellung eines gelben     1Vionoazofarbstoffes.       Es wurde gefunden, dass man durch Ver  einigung einer     Diazoverbindung    aus einer       Anilins lfosäure    und 1-     (2'-Chlor-5'-sulfophe-          nyl)-3-methyl-5-pyrazolon    zu gelben     Monoazo-          tarbstoffen    gelant, die sich neben vorzüg  licher Löslichkeit' dadurch auszeichnen, dass  die mit ihnen erzeugten Färbungen auf Wolle  sowohl eine sehr gute Egalität als auch eine  sehr gute Wasserechtheit besitzen. Daneben  zeichnen sich die Färbungen durch den Grün  stich und die Klarheit ihrer Farbtöne und  ganz besonders durch hervorragende Licht  echtheit aus.  



  Gegenstand der vorliegenden Anmeldung  ist nun ein Verfahren zur Darstellung eines  gelben     Monoazofarbstoffes,    welches dadurch  gekennzeichnet ist, dass man     diazotierte        p-          Aminobenzolsulfosäure    mit 1-(2' -Chlor -     5'-          sulfophenyl)-3-methyl-5-pyrazolon    kuppelt.  



  <I>Beispiel</I>  288,5 Gewichtsteile     1-(2'-Chlor-5'-sulfo-          phenyl)-3-methyl-5-pyrazolon    werden in en-         gefähr    1000 Gewichtsteilen Wasser und 212  Gewichtsteilen Soda gelöst. Dazu lässt man  eine in bekannter Weise aus 173 Gewichts  teilen     p-Aniinobenzolsulfosäure    erhaltene     Di-          azolösung    langsam einlaufen. Nach beendeter  Kupplung wird der Farbstoff durch wenig  Kochsalz zur     Abscheidung    gebracht; er stellt  nach dem Absaugen und Trocknen ein gelbes  Pulver dar, welches bei spielender Löslich  keit auch in kalkhaltigem Wasser Wolle in       grünstichig-gelbem    Farbton anfärbt.

   Die Fär  bung zeichnet sich durch hervorragende Licht  echtheit; sehr gute Egalität und Wasserecht  heit aas.



  Process for the preparation of a yellow 1Vionoazo dye. It has been found that combining a diazo compound from an aniline lfoic acid and 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone leads to yellow monoazo-tar substances which are also excellent Licher solubility 'are characterized by the fact that the dyeings on wool produced with them have both very good levelness and very good waterfastness. In addition, the colors are characterized by the green cast and the clarity of their color tones and, in particular, by excellent lightfastness.



  The present application now relates to a process for preparing a yellow monoazo dye, which is characterized in that diazotized p-aminobenzenesulfonic acid is coupled with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone.



  <I> Example </I> 288.5 parts by weight of 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone are dissolved in approximately 1000 parts by weight of water and 212 parts by weight of soda. For this purpose, a diazole solution obtained in a known manner from 173 parts by weight of p-aniinobenzenesulfonic acid is slowly run in. After the coupling has ended, the dye is made to separate out by adding a little sodium chloride; After vacuuming and drying, it is a yellow powder which, with easy solubility, dyes wool in a greenish-yellow shade even in hard water.

   The coloring is characterized by excellent lightfastness; very good equality and water fastness is called aas.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines gelben Monoazofarbstoffes, dadurch gekennzeichnet, dass man diazotierte p-Aminobenzolsulfosäure mit 1-(2'-Chlor-5'-sulfophenyl)-3-methyl-5- pyrazolon kuppelt. Der Farbstoff stellt ein gelbes Pulver dar, welches bei spielender Löslichkeit auch in kalkhaltigem Wasser Wolle in grünstichig-gelbem Farbton anfärbt. Die Färbung zeichnet sich durch hervor- ragende Lichtechtheit, gute Egalität und Wasserechtheit aus. Claim: Process for the preparation of a yellow monoazo dye, characterized in that diazotized p-aminobenzenesulfonic acid is coupled with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone. The dye is a yellow powder which, with its solubility, dyes wool in a greenish-yellow shade even in calcareous water. The dyeing is characterized by excellent lightfastness, good levelness and waterfastness.
CH136648D 1927-05-10 1928-05-07 Process for the preparation of a yellow monoazo dye. CH136648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE136648X 1927-05-10

Publications (1)

Publication Number Publication Date
CH136648A true CH136648A (en) 1929-11-30

Family

ID=5666468

Family Applications (1)

Application Number Title Priority Date Filing Date
CH136648D CH136648A (en) 1927-05-10 1928-05-07 Process for the preparation of a yellow monoazo dye.

Country Status (1)

Country Link
CH (1) CH136648A (en)

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