DE163054C - - Google Patents

Description

Dye off
Ethyl-α-
Naphthylamine
and colour
of the dry
Dye colour
the aqueous
solution Watery
Solution on
Addition of
hydrochloric acid Watery
Solution on
Addition of
ammonia Solution in
conc.
sulfur
acid At the
Dilute
same with
water coloring
acetic acid on
Wool To-
coppered To-
chromed 2 - amido
i - phenol-
4 - sulfonic acid chocolate
Brown bordeaux purple
Coloring, after
short time
purple down
blow yellow-red
solution violet purple
Precipitation Red dark
violet red-violet 3-amido
4-cresol
5 - sulfonic acid red-brown bordeaux blue-violet
Coloring, then
excretion
a purple one
Precipitation fuchsin
solution violet purple
Precipitation bordeaux blue blue-violet 4 nitro
2-amidophenol-
6-sulfonic acid bronze colored carmine red-violet
Solution and
Precipitation yellow-red
solution violet red-violet
Solution and
precipitation purple red blue violet 6 nitro
2-amidophenol-
4-sulfonic acid Brown black violet red-brown
precipitation fuchsin
solution violet brownish red
precipitation violet gray-blue blue-violet 4-chlorine
2-amidophenol-
6 - sulfonic acid chocolate
Brown bordeaux purple precipitate fuchsin
solution blue bluer
Precipitation carmine pure blue reddish blue 4-acetamido
2-amidophenol-
6 - sulfonic acid bronze colored bordeaux purple
Precipitation fuchsin
solution violet red-violet
Solution and
precipitation bordeaux pure blue blunt
blue 2-amido
i - phenol-
4-6-disulfo-
acid bronze colored blue red purple solution yellow-red
solution violet purple
solution brownish red pure blue blunt
blue

Claims (1)

IMPERIAL PATENT OFFICE. Wool dyes, which give blue nuances when treated with copper salts, are made known by a number of patents. Characteristic of the composition of all azo dyes described therein is that they are produced by combining Orthooxydiazo bodies with the various Periamidonaphthol sulfonic acids or with the one from perinaphthylenediaminesulfonic acid ίο ΐ · 8 · 4 resulting azimide sulfonic acid (patent specifications 139908 and 143387) are formed. The surprising observation has now been made that a class of dyes with a completely different composition also give valuable violet to pure blue nuances on aftertreatment with copper salts. These are the azo dyes from o-amidophenolsulfonic acid, their homologous and substituted derivatives with ethyl -a- naphthylamine. It turns out that pure blue nuances are mainly obtained when the sulfo group is adjacent to the hydroxyl in the diazophenolsulfonic acid used. Example for the production of the dyes: 20.3 kg of 3-amido-4-cresol-5-sulfonic acid are dissolved in water and the amount of soda required to form the sodium salt. 35 kg of hydrochloric acid (specific weight 1.15) are added in the cold and the mixture is diazotized with 7 kg Sodium nitrite; the amidocresol sulfonic acid initially separated goes into solution. 20.7 kg of ethylnaphthylamine chlorohydrate are then dissolved in the yellow diazo solution flow in water. The dye formation begins immediately with the excretion of a purple one Precipitation. After a few hours, the excess mineral acid is blunted with sodium acetate and stirring is stopped with heating to 50 to 60 ° until only traces of diazocresol sulfonic acid can be detected with alkaline resorcinol solution are. The dye acid formed is then filtered off and dissolved in dilute soda solution, the sodium salt formed is precipitated with salt, filtered, pressed and dries. The properties of various dyes of the present invention are as follows Given in the table. Patent claim: Process for the preparation of monoazo dyes for wool, consisting therein that orthoamidophenolsulfonic acid and its homologous and substituted derivatives combined with ethyl-a-naphthylamine will.