CH110288A - Process for the preparation of a new cotton dye. - Google Patents

Process for the preparation of a new cotton dye.

Info

Publication number
CH110288A
CH110288A CH110288DA CH110288A CH 110288 A CH110288 A CH 110288A CH 110288D A CH110288D A CH 110288DA CH 110288 A CH110288 A CH 110288A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
sulfonic acid
new cotton
cotton dye
Prior art date
Application number
Other languages
German (de)
Inventor
Farbenfabriken Vorm Friedr Co
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Publication of CH110288A publication Critical patent/CH110288A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups

Landscapes

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

Description

  

  Verfahren zur Darstellung eines neuen     Baumwollfarbstoffes.       Es wurde gefunden, dass ein direktziehen  der, lichtechter,     violettstichig    blauer     Baum-          wollfarbstoff    dadurch erhalten wird, dass man  die     Diazoverbindung    aus     2.5-Dichloranilin-4-          sulfosäure    mit der     4-Methyl-2-aminobenzoe-          säure    vereinigt, weiter dianotiert und mit       2-Phenylamino-5-naphtol-7-sulfosäure    kuppelt.

    Der     Farbstoff    lässt sich in Substanz oder auf  der Faser nachkupfern und erhält dadurch  ohne eine Beeinträchtigung der Klarheit eine  hervorragende Lichtechtheit.         Beispiel:       24,2 Gewichtsteile     2.5-Dichloranilin-4-          sulfosäure    werden wie üblich dianotiert und  mit 15,1 Gewichtsteilen     4-Methyl-2-amino-          benzoesäure    essigsauer gekuppelt.

   Nach be  endeter Kupplung wird alkalisch gemacht  mit<B>6,9</B> Gewichtsteilen Nitrit versetzt und  durch     Einlaufenlassen    in Salzsäure und Eis       weiterdiazotiert.    Die fertige Dianotierung lässt  man dann in eine     sodaalkalische    Lösung von  31,5 Gewichtsteilen 2-Phenylamino-5-naphtol-         7-sulfosäure    einfliessen. Nach kurzer Zeit ist  die Kupplung beendet, worauf der Farbstoff       ausgesalzen    wird. Er färbt Baumwolle in  blaustichig roten Tönen von vorzüglicher  Lichtechtheit. Durch Nachkupfern wird die  Nuance in ein     violettstichiges    Blau verschoben  und die Lichtechtheit noch erhöht.



  Process for the preparation of a new cotton dye. It has been found that the lightfast, violet-tinged blue cotton dye is obtained by combining the diazo compound of 2,5-dichloroaniline-4-sulfonic acid with 4-methyl-2-aminobenzoic acid, further dianotizing it and adding 2 -Phenylamino-5-naphthol-7-sulfonic acid couples.

    The dye can be re-coppered in substance or on the fiber and thus has excellent lightfastness without impairing the clarity. Example: 24.2 parts by weight of 2,5-dichloroaniline-4-sulfonic acid are dianotized as usual and coupled with 15.1 parts by weight of 4-methyl-2-aminobenzoic acid with acetic acid.

   After the coupling has ended, it is made alkaline with <B> 6.9 </B> parts by weight of nitrite and diazotized further by running it into hydrochloric acid and ice. The finished dianotation is then allowed to flow into a soda-alkaline solution of 31.5 parts by weight of 2-phenylamino-5-naphthol-7-sulfonic acid. After a short time, the coupling is complete, whereupon the dye is salted out. It dyes cotton in bluish red shades of excellent lightfastness. After copper plating, the shade is shifted to a violet-tinged blue and the lightfastness is increased.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines direkt ziehenden Baumwollfarbstoffes, dadurch ge kennzeichnet, dass man die Diazoverbindung der 2.5-Dichloranilin-4-sulfosäure mit der 4-Methyl-2-aminobenzoesäure vereinigt, weiter dianotiert und mit der 2-Phenylamino-5- naphtol-7-sulfosäure kuppelt. Der Farbstoff färbt Baumwolle blaustichig rot, nachgekupfert violettstichig blau an. Die nachgekupferte Färbung ist lichtecht. PATENT CLAIM: Process for the preparation of a direct cotton dye, characterized in that the diazo compound of 2.5-dichloroaniline-4-sulfonic acid is combined with 4-methyl-2-aminobenzoic acid, further dianotized and treated with 2-phenylamino-5-naphthol 7-sulfonic acid couples. The dye stains cotton with a bluish red tinge, and after-coppered a violet tint blue. The re-coppered color is lightfast.
CH110288D 1923-07-18 1924-06-05 Process for the preparation of a new cotton dye. CH110288A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF54402D DE416822C (en) 1923-07-18 1923-07-18 Process for the preparation of substantive cotton azo dyes

Publications (1)

Publication Number Publication Date
CH110288A true CH110288A (en) 1925-05-16

Family

ID=7107056

Family Applications (1)

Application Number Title Priority Date Filing Date
CH110288D CH110288A (en) 1923-07-18 1924-06-05 Process for the preparation of a new cotton dye.

Country Status (5)

Country Link
AT (1) AT101312B (en)
CH (1) CH110288A (en)
DE (1) DE416822C (en)
FR (1) FR583233A (en)
GB (1) GB219299A (en)

Also Published As

Publication number Publication date
GB219299A (en) 1925-06-18
FR583233A (en) 1925-01-08
AT101312B (en) 1925-10-26
DE416822C (en) 1925-07-29

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