CH148687A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH148687A
CH148687A CH148687DA CH148687A CH 148687 A CH148687 A CH 148687A CH 148687D A CH148687D A CH 148687DA CH 148687 A CH148687 A CH 148687A
Authority
CH
Switzerland
Prior art keywords
red
preparation
dye
vat
vat dye
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 CH148687A publication Critical patent/CH148687A/en

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Description

  

  Verfahren zur Darstellung eines     KÜpenfarbstoffes.       Gegenstand dieses     Patentes    ist ein Ver  fahren zur Darstellung eines     Küpenfarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man     Naphtoylen-benzimidazol-peri-di-          carbonsäureanhydrid    mit 1.     2-Dimethyl-4.        5-          diaminobenzol    kondensiert.    <I>Beispiel: .</I>  



  3,4 Gewichtsteile     Naplitoylen-benzimid-          azol-peri-dicarbonsäureanhydrid    werden zu  sammen mit 1,4 Gewichtsteilen     1.2-Di-          methyl-4    .     5-diaminobenzol    in etwa der zehn  fachen Menge Eisessig zum gelinden Sieden  erhitzt, bis die     Abscheidung    des Farbstoffes  beendet ist. Durch Absaugen, Waschen mit  Eisessig, Äthylalkohol und Wasser wird der  Farbstoff     isoliert.    Er     stellt    ein     braunrotes     Pulver dar, das sich in     konzentrierter     Schwefelsäure mit roter Farbe löst.

   Er färbt  aus grüner, in dicker Schicht und in der  Aufsicht rot erscheinender     Hydrosulfitküpe     Baumwolle in kupferroten Tönen von     guten     Echtheitseigenschaften an.



  Process for the preparation of a vat dye. The subject of this patent is a process for the preparation of a vat dye, which is characterized in that naphthoylene-benzimidazole-peri-dicarboxylic acid anhydride with 1,2-dimethyl-4. 5-diaminobenzene condensed. <I> Example:. </I>



  3.4 parts by weight of naplitoylen-benzimid-azole-peri-dicarboxylic acid anhydride are added together with 1.4 parts by weight of 1,2-dimethyl-4. Heat 5-diaminobenzene in about ten times the amount of glacial acetic acid to a gentle boil until the dye has finished separating. The dye is isolated by suction, washing with glacial acetic acid, ethyl alcohol and water. It is a brownish-red powder that dissolves in concentrated sulfuric acid with a red color.

   It dyes cotton in copper-red tones with good fastness properties from green hydrosulfite vat, which appears red in a thick layer and when viewed from above.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man Naphtoylen-benzimidazol-peri-dicarbon- säureanhydrid mit 1.2-Dimethyl-4.5-di- aminobenzol kondensiert. Der so erhaltene Farbstoff stellt ein braunrotes Pulver dar, das sich in konzen trierter Schwefelsäure mit roter Farbe löst. Er färbt aus grüner, in dicker Schicht und in der Aufsicht rot erscheinender Hydro- sulfitküpe Baumwolle in kupferroten Tönen von g-zten Echtheitseigenschaften an. UNTERANSPRüCHE 1. Claim: Process for the preparation of a vat dye, characterized in that naphthoylene-benzimidazole-peri-dicarboxylic acid anhydride is condensed with 1,2-dimethyl-4,5-diaminobenzene. The dye thus obtained is a brownish-red powder which dissolves in concentrated sulfuric acid with a red color. It dyes cotton in copper-red shades of great fastness properties from green, in a thick layer and red from above, the hydrosulfite vat. SUBCLAIMS 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensa tion in Gegenwart eines Lösungsmittels ausführt. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensa tion unter Erwärmen durchführt. Process according to claim, characterized in that the condensation is carried out in the presence of a solvent. 2. The method according to claim, characterized in that the condensation is carried out with heating.
CH148687D 1928-06-18 1929-06-05 Process for the preparation of a vat dye. CH148687A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148687X 1928-06-18
CH143998T 1929-06-05

Publications (1)

Publication Number Publication Date
CH148687A true CH148687A (en) 1931-07-31

Family

ID=25714396

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148687D CH148687A (en) 1928-06-18 1929-06-05 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH148687A (en)

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