AT58780B - Process for the preparation of violet- to green-black basic disazo dyes. - Google Patents

Process for the preparation of violet- to green-black basic disazo dyes.

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Publication number
AT58780B
AT58780B AT58780DA AT58780B AT 58780 B AT58780 B AT 58780B AT 58780D A AT58780D A AT 58780DA AT 58780 B AT58780 B AT 58780B
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Austria
Prior art keywords
black
preparation
violet
green
disazo dyes
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German (de)
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Hoechst Ag
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Publication of AT58780B publication Critical patent/AT58780B/en

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Description

  

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  Verfahren zur Darstellung von violett- bis grünschwarzen basischen Disazofarbstoffen. 



   In den deutschen Patentschriften Nr.   95530,   Nr. 98585, Nr. 100420, Nr. 109491 wurden basischo sekundäre Disazofarbstoffe beschrieben, welche in Anfangsstellung   Aminophenyltrimethylammonium,   in Mittelstellung primäre Amine, in Endstellung Amine und Phenole haben. Unter all den vielen beschriebenen Kombinationen ist keine, welche die Faser schwarz färbt. Es sind derartige schwarze basische Disazofarbstoffe bisher überhaupt nicht bekannt. 



   Es wurde nun gefunden, dass die   Kombination Aminophenyltrimetylammonium #     m-Toluidin # 1#8-Diaminonaphtalin   ein Farbstoff ist, welcher sehr schöne und waschechte schwarze Färbungen liefert, die namentlich auf Kunstseide von hohen Wert sind. Das war nicht   vorauszusehen. Bei   analog zusammengesetzten Säurefarbstoffen von der allgemeinen Konstitution :   Benzolderivat # Benzolderivat # Naphtalinderivat   erzielte man rote, bei Anhäufung   auxochromer   Gruppen im endständigen Naphtalinrest höchstens violette Nuancen. 



   Der in der Patentschrift Nr. 109491 beschriebene Farbstoff   Aminophenyltrimethyl-     ammonium # Aminohydrochinodimethyläther # 1.5-Aminonaphtol   unterscheidet sich von dem Farbstoff der vorliegenden Erfindung wesentlich dadurch, dass er, trotzdem in Mittelstellung der viel mehr auxochrome Gruppen tragende Hydrochinonäther steht, nur blaue Färbungen liefert, während schon   1"/oigne   Färbungen des Farbstoffes der vorliegenden Erfindung tiefschwarz sind Bei Verwendung von   m.. Diaminen   in Endstellung werden nur braune Nuancen erhalten. 



   Durch die Herstellung des neuen Farbstoffes wird einem längst gefühlten Bedürfnis abgeholfen, insofern,   a) s noch kein Farbstoff   existiert, der Kunstseide im neutralen oder sauren Bade, also mit möglichster Schonung der Faser, schwarz färbt. Es wird demnach lurch das Verfahren ein wesenthcher technischer Fortschritt erzielt. 



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



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  Process for the preparation of violet- to green-black basic disazo dyes.



   In the German patents No. 95530, No. 98585, No. 100420, No. 109491, basic secondary disazo dyes were described which have aminophenyltrimethylammonium in the initial position, primary amines in the middle position and amines and phenols in the end position. Among all the many combinations described, there is none that will color the fiber black. Such black basic disazo dyes are not known at all.



   It has now been found that the combination aminophenyltrimetylammonium # m-toluidine # 1 # 8-diaminonaphthalene is a dye which gives very beautiful and washfast black colorations which are particularly valuable on rayon. That was not to be foreseen. In the case of acid dyes with an analogous composition and of the general constitution: benzene derivative # benzene derivative # naphthalene derivative, red, at most violet nuances when there was an accumulation of auxochromic groups in the terminal naphthalene residue.



   The dye aminophenyltrimethylammonium # Aminohydroquinodimethyläther # 1.5-aminonaphtol described in patent specification No. 109491 differs from the dye of the present invention essentially in that, despite being in the middle position of the hydroquinone ether, which carries much more auxochromic groups, it only gives blue colorations, while Even 1 ″ / oigne colorations of the dye of the present invention are deep black. When using m .. diamines in the end position, only brown shades are obtained.



   The production of the new dye remedies a need that has long been felt, insofar as there is still no dye that dyes artificial silk black in a neutral or acid bath, i.e. with the greatest possible care for the fiber. A substantial technical advance is therefore achieved with the method.



   At s p i e).
 EMI1.1
 

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

 

Claims (1)

Nach längerem Rühren wird auf etwa 50 angewärmt und durch Zusatz von Kochsalzlösung ausgesalzen. Getrocknet bildet der Farbstoff ein schwarzes Pulver. Er färbt auf Kunstseide ein schones Blanviolettchwarz, PATENT-ANSPRUCH : Verfahren zur Darstellung eines schwarzen basischen Disazofarbstoffes, dadurch gekennzeichnet, dass Trimethylammoniumphenyl-azo-m-toluidin diazotiert und auf 1. 8-Diamino- naphtalin zur Einwirkung gebracht wird. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. After prolonged stirring, the mixture is warmed to about 50 and salted out by adding saline solution. When dried, the dye forms a black powder. He dyes a beautiful blue violet black on artificial silk, PATENT CLAIM: Process for the preparation of a black basic disazo dye, characterized in that trimethylammonium phenyl-azo-m-toluidine is diazotized and brought into action on 1,8-diamino naphthalene. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT58780D 1910-10-12 1911-09-20 Process for the preparation of violet- to green-black basic disazo dyes. AT58780B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE58780X 1910-10-12

Publications (1)

Publication Number Publication Date
AT58780B true AT58780B (en) 1913-04-25

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ID=5629714

Family Applications (1)

Application Number Title Priority Date Filing Date
AT58780D AT58780B (en) 1910-10-12 1911-09-20 Process for the preparation of violet- to green-black basic disazo dyes.

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AT (1) AT58780B (en)

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