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CH171368A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH171368A
CH171368A CH171368DA CH171368A CH 171368 A CH171368 A CH 171368A CH 171368D A CH171368D A CH 171368DA CH 171368 A CH171368 A CH 171368A
Authority
CH
Switzerland
Prior art keywords
preparation
disazo dye
dye
disazo
pyrazolone
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 CH171368A publication Critical patent/CH171368A/en

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Description

  

  Verfahren zur Herstellung eines     Disazofarbstoffes.       <B>EI</B> s wurde gefunden, dass man einen wert  vollen     Disazofarbstoff    erhalten kann, wenn  man     tetra.zotiertes        o-Dianisidin    mit     1-(4'-11Ie-          thylphenyl)-3-methyl-5-pyrazolon    kuppelt.  



  Der erhaltene leuchtend gelbrote Farb  stoff ist in organischen Lösungsmitteln, z. B.  Benzol, Alkohol, unlöslich und vulkanisier  eeht.  



       Beispiel:     Man     tetrazotiert    2,5 Gewichtsteile     o-Di-          anisidin    in der üblichen Weise und. gibt die  erhaltene Lösung der     Tetrazoverbindung    zu  einer wässerig alkalischen Suspension von  40 Gewichtsteilen     1-(4'-Methylphenyl)-3-me-          thyl-5-pyrazolon,    die überschüssiges Na  triumbikarbonat enthält. Nach beendeter    Kupplung wird aufgekocht, dann     abfiltriert     und salzfrei gewaschen.



  Process for the preparation of a disazo dye. It has been found that a valuable disazo dye can be obtained if tetra-doped o-dianisidine is coupled with 1- (4'-11Iethylphenyl) -3-methyl-5-pyrazolone.



  The bright yellow-red dye obtained is in organic solvents such. B. benzene, alcohol, insoluble and vulcanizing.



       Example: 2.5 parts by weight of o-di anisidine are tetrazotized in the usual manner and. gives the resulting solution of the tetrazo compound to an aqueous alkaline suspension of 40 parts by weight of 1- (4'-methylphenyl) -3-methyl-5-pyrazolone, which contains excess sodium bicarbonate. After the coupling has ended, the mixture is boiled, then filtered off and washed free of salt.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes o-Dianisidin mit 1-(4'-Me- thylphenyl)-3-methyl-5-pyrazolon kuppelt. Der erhaltene leuchtend gelbrote Farb stoff ist in organischen Lösungsmitteln, z. B. Benzol, Alkohol, unlöslich und vulkanisier- echt. PATENT CLAIM: Process for the production of a disazo dye, characterized in that tetrazotized o-dianisidine is coupled with 1- (4'-methylphenyl) -3-methyl-5-pyrazolone. The bright yellow-red dye obtained is in organic solvents such. B. benzene, alcohol, insoluble and vulcanisable.
CH171368D 1932-11-22 1933-10-17 Process for the preparation of a disazo dye. CH171368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE171368X 1932-11-22

Publications (1)

Publication Number Publication Date
CH171368A true CH171368A (en) 1934-08-31

Family

ID=5689396

Family Applications (1)

Application Number Title Priority Date Filing Date
CH171368D CH171368A (en) 1932-11-22 1933-10-17 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH171368A (en)

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