DE118655C - - Google Patents

Description

IMPERIAL jfk

PATENT OFFICE.

It has been found that valuable blue secondary disazo dyes of indigo-like shade are formed when d-, a ₄ -phenylnaphthylamine sulfonic acid, which can be prepared according to the method of patent 70349 by heating O ₁ a ₄ -naphthylamine sulfonic acid with aniline, and hydrochloric aniline, is coupled with the diazo compounds of those Amidoazoproducte, the so-called by the action of diazo compounds. Cleve's A ₁ ß ₃ - and Ct ₁ ß ₄ -naphtylamine sulfonic acids are obtained.

This observation is remarkable because dyes of a similar type, e.g. those of patent 73901, consistently deliver black nuances.

The procedure is that which is usual for the preparation of such dyes.

Example I.

The amidoazo body prepared in the usual way from 9.3 kg of aniline and 24.5 kg of Ci ₁ ß ₄ -naphtylaminsulfosaurem sodium is suspended in 300 l of water and mixed with 7 kg of nitrite and 35 kg of hydrochloric acid (20 ° B.) with cooling. After about 12 hours of stirring, the diazotization is complete. The separated diazo body is filtered, washed with water and then slurried with 200 l of water in a solution of 29.9 kg of α. _Ύ ci ₄ -Phenylnaphtylamine sulfonic acid and 35 kg of sodium acetic acid entered in 500 l of water. After stirring for 12 hours, the mixture is warmed to approx. 60 ° and made alkaline with soda. The dye then precipitates in a crystalline manner.

He dyes wool in an acetic acid bath in beautiful, clear, blue shades, which are alkali-fast and lightfast and are characterized by excellent flexing fastness.

Example II.

14.3 kg of ß-naphthylamine are diazotized in the usual way and _{coupled with 24.5 kg of Ci 1} ß ₄ -naphthylamine sulfonic acid. The Amidoazokörper thus obtained is suspended in 450 1 of water and while cooling with 7 kg of nitrite and 35 kg of hydrochloric acid (20 ⁰ B.) was added. The mixture is then left to stand with stirring until the diazotization has ended (approx. 12 hours). The precipitated diazo compound is filtered, freed from the excess acid by washing, and then mixed with 300 liters of water. The thin paste thus obtained is then stirred into a solution of 29.9 kg of Ct ₁ a ₄ -phenylnaphthylamine sulfonic acid and 30 kg of sodium acetate in 600 l of water at ordinary temperature. After stirring for a further 12 hours, the mixture is warmed to approx. 60 ° and made alkaline with soda. The dye precipitated with the addition of common salt is filtered and dried.

It stains wool in an acetic acid bath in slightly greener shades than that in both

game I described dye. The fastness properties are the same for both dyes. the same.

The other dyes are represented in an analogous manner. We mention for example the products which the following amines come first

Place contain: a-naphthylamine, p-nitraniline, m - amidobenzene sulfonic acid, amidosalicylic acid, a _x a ₂ -naphtylamine sulfonic acid, P ₁ ß _s -naphtylamine sulfonic acid.

The following table lists the nuances of a number of the new dyes.

Dye obtained by coupling from Ci ₁ Ct ₄ - phenylnaphthylamine sulfonic acid -Naphthylamine sulfonic acid Dyes wool with the diazotized amidoazo compound 55 ι. Aniline "+ S ₁ ß ₃ 55
55
55 blue 3. m-sulfanilic acid - \ 55
55 55
55 4 · "4
5. Amidosalicylic Acid ^J.
6. α-Naphthylamine ■. '■ - 55
55
55 55
55
55 7 · ß- 5, 4
8. Ci ₁ a ₂ -naphtylamine sulfonic acid - 55 ■ ■
55 55
greenish blue 9 ßl ß3 ~ 55
10. p-nitroaniline
11. Amidosalicylic acid ■
12. α-Naphthylamine 55 55
green Blue
blue
55 13 · ß- 5, 4
14. Ct ₁ a ₂ -naphtylamine sulfonic acid -
16. p-nitroaniline 55
greenish blue
blue
green Blue. - «i ß * - «eat *
- «eats
- «1 ß - «eat ₈
- «eat ₈ - «eats
- «eat *
- «eat ₃
- «eat ₈ - «1 ß *
- «! 0 ₃

Claims (1)

Patent claims: ι. Process for the preparation of blue, secondary, a _{ a ₄ -phenylnaphthylamine sulfonic acid in the terminal position containing disazo dyes, consisting in that this acid is mixed with the diazo compounds of those amido- ■ azo bodies, which one by the action of diazo compounds on the sucked Cleve's a _x ß ₃ - and a _x 0 ₄ -naphtylamine sulfonic acids are obtained.
The particular embodiments of claim 1 using the diazo compounds of the following amines in the first place: aniline, α-naphthylamine, β-naphthylamine, p-nitraniline, m-amidobenzenesulfonic acid, amidosalicylic acid, a _x a ₂ -naphthylamine sulfonic acid, P ₁ ß ₃ -naphthylamine sulfonic acid.