DE177622C - - Google Patents

Description

IMPERIAL

PATENT OFFICE

CLASS 22 a. GROUP

in FRANKFURT a. M.

In patent 167257 monoazo dyes were described which can be obtained by coupling the diazo compound of o-o-acetyldiaminophenol-p-sulfonic acid with different components. These monoazo dyes have wool dyes that can be post-chromed a high technical value. In further processing of the derivatives of diaminophenolsulfonic acid it has now been found that the diaminophenolsulfonic acid benzoylated on one side also:

NHC ₆ H ₅ CO

SO ₃ H

diazotized and coupled with a wide variety of components, monoazo dyes which - treated with chromium salts on the fiber - in just as real lacquers pass like the dyes from acetyldiaminophenol sulfonic acid. Just like the latter the new monoazo dyes from benzoyldiaminophenolsulfonic acid are advantageous due to its excellent leveling ability when dyeing.

The representation of the dyes is illustrated by the following examples:

Example I.

30.8 parts of benzoyldiaminophenolsulphonic acid are dissolved in water with the addition of the calculated amount of alkali, the solution is cooled with ice and treated with 35 parts of hydrochloric acid 21 ° Be. added, whereby the benzoyldiaminophenolsulfonic acid precipitates in finely divided form. Now diazotising with the addition of 7.2 parts technical nitrite, has gone to all Benzoyldiaminophenolsulfosäure as diazo clear in solution and allowing the diazo in a sodaalkalisch held resolution of 16 parts Dioxynaphtalin · - 1: 5 in 24 parts of sodium hydroxide 40 ⁰ Be. come in. The dye compound is soon terminated and the finished dye is precipitated by salting out the blue-violet colored coupling liquid, filtered and dried. It is a black, shiny bronze powder that dissolves in water with a blue-violet color. When sodium hydroxide is added to the aqueous solution, the color changes to red-violet. The solution of the dye in concentrated sulfuric acid looks green. Dyed on wool in an acid bath, the dye produces a reddish-brown which levels out excellently, if the color bath is very exhausted. After chroming, the nuance turns into a deep blue-tinged black, which in relation to

Milling, blood, washing and acid boiling fastness meet the most extensive requirements of real wool dyeing is equivalent to.

Example II.

30.8 parts of benzoyldiaminophenolsulfonic acid are diazotized as described in Example I, coupled in a weakly alkaline solution with 11 kg of m-phenylenediamine, the Dye precipitated through table salt and dried. It is a brown powder that turns slightly yellow-brown in color in water

Diazotrated benzoyldiaminophenol sulfonic acid and dye

Resorcinol

α- naphtol

ß-Naphfol ... '.

α-oxynaphtoic acid

β-oxynaphtoic acid. ,

m - tolylenediamine

m-aminophenol

2 · 7-dioxynaphthalene

ι · 4-naphthol sulfonic acid

ι · 5-naphthol sulfonic acid

2 x 6-naphthol sulfonic acid

2 x 7-naphthol sulfonic acid

2x5x7-aminonaphthol sulfonic acid

ι · 8 · 4- aminonaphthol sulfonic acid .... '., 1-8-3 · 6-aminonaphthol disulfonic acid., ι · 8 · 3 · 6-dioxynaphthalene disulfonic acid

Phenylmethylpyrazolone

Phenylmethylpyrazolone carboxylic acid Phenylmethylpyrazolone sulfonic acid. . . .

solves. Its solution in concentrated sulfuric acid is orange-red. He dyes on wool in acidic bath a yellow tan; the dye baths are well exhausted. When re-chrome plating the result is a yellow-tinged deep brown whose fastness properties are the same excellent are like that of the dye of Example I.

A large number of other combinations can be produced in an analogous manner, the most important of which are characterized in the following table:

Colors direct: Wool brownish yellow chromed: Brown bordeaux brownish red gray-brown yellow-brown black purple black-brown purple brown Brown purple black yellow-brown dark brown red-brown brown purple bordeaux purple black bordeaux black purple brownish red black purple brownish red purple black brick red purple black violet black blue violet dark green violet dark green orange yellow dark blue orange yellow brick red orange yellow brick red brick red.

Claims (1)

Patent Claim:. . Process for the representation of Brominable o-oxymonoazo dyes, characterized in that they are diazotized Monobenzoyl-o-o-diaminophenol- p-sulfonic acid with phenols, naphthols, aminophenols, m-diamines, dioxynaphthalenes, Aminonaphthols, pyrazo ions and their sulfo and carboxylic acids clutch.