DE465972C - Process for dyeing animal fibers - Google Patents

Description

Process for dyeing animal fibers Sulphated derivatives of i # 4-diaminobenzene or the i # q.-di- (q.-aminophenylamino-) benzene, which at both Amino groups carry an unsubstituted or substituted naphthyl radical or are only substituted in one amino group by such a naphthyl radical while the other amino group unsubstituted, tuiert or any, z. B. by alkyl, aryl-aminoaryl, Oxyaryl, '- can be substituted, or sulfated, in one or both of the amino, groups by aryl substituted derivatives of diaminonaphthalenes pull, as found became, from acidic solutions, on animal fibers and permeate on them convert suitable oxidizing agents into valuable dyes. Example i ioo parts Wool are at ordinary temperature in one of 4ooo parts of water, 6 parts 4-aminosulfophenyl-2-naphthylamine (colorless compound obtained from concentrated aqueous Solution is precipitated by sodium chloride and its solution is upon long standing turns blue in the air), 10 parts of sodium sulfate and 5 parts of acetic acid Bath brought: the temperature is raised to the boil, 3 parts of sulfuric acid are added and cook for an hour. After rinsing, it is about 1/2 hour in a boiling bath post-treated of 3 parts of potassium dichromate and 3 parts of sulfuric acid in 400o parts of water, a full flowery black is produced on the fiber.

In the same way gives q.-aminophenyl-2-naphthylamine-6-sulfonic acid a black color.

Example 2 100 parts of wool are in a normal temperature from 400o parts of water, 6 parts of i # 4-di (6-sulfo'-2-naphthylamino) benzene (colorless Compound, the aqueous solution of which is orange by alkaline oxidizing agents acidic oxidizing agent turns green and finally black), 10 parts of sodium sulfate and brought 5 parts of sulfuric acid existing bath. The temperature is raised until boiling, boil for an hour, add 3 parts of potassium dichromate, boil another half an hour, rinses and dries. You get a real deep black.

Example 3 100 parts of wool are converted into one of 6 parts of i-naphthyl-4 # 4 .'-diaminodiphenylamine-2'-sulfonic acid sodium (colorless compound, its aqueous Solution is colored bluish red by alkaline oxidizing agents, while acidic Oxidizing agents produce a blue-black precipitate), 10 parts of sodium sulfate and Brought 15 parts of acetic acid into q, ooo parts of water in an existing bath. The bathroom will i hour kept in the boil, whereupon the wool is rinsed and about 1/2 Hour in a boiling hot bath of 3 parts of potassium dichromate and 3 parts of sulfuric acid is post-treated in 4,000 parts of water - resulting in a real deep black.

The use of 2-naphthyl- [] leads to a similar result. 4'-diaminodiphenylamine-2'-sulfonic acid.

Example q.

100 parts of wool are mixed as above in a bath of 6 parts q. # ß-naphthylaminoq .'- oxydiphenylamine-2-sulfonic acid sodium (colorless compound, their aqueous solution, cast on paper, by means of alkaline oxidizing agents orange, is colored dirty blue by acidic oxidizing agents), To parts of sodium sulfate, Treated to parts of sulfuric acid in 400o parts of water. The rinsed wool is as in Example 3, after-treated. A real full black is created.

EXAMPLE 5 100 parts of wool are dissolved in a bath of 6 parts of 1 # 4.-di- (q. # Ss-naphthylamino-2-sulfophenylamino-) benzene (colorless compound, the aqueous solution of which with alkaline oxidizing agents burgundy color; a black-green precipitate with acidic oxidizing agents there), To parts of sodium sulfate, q. Parts of sulfuric acid and 4,000 parts of water z Boiling hot for an hour, then in the same bath after adding 3 parts of potassium dichromate 1/2 hour treated. The result is a real black color.

A similar result is obtained when using the corresponding one α-Naphthylderivats, Example 6 100 parts of wool are in a bath of 6 parts i # 5-Di (q.-p-methylphenylamino-3-sulfophenylamino) naphthalene (colorless compound, their aqueous solution rides a blue-red color with alkaline oxidizing agents acidic oxidizing agents give a greenish black precipitate), To parts of sodium sulfate, 4 parts of sulfuric acid in 4,000 parts of water = boiled for one hour and after rinsing in a boiling bath of 3 parts of potassium dichromate and 3 parts of sulfuric acid aftertreated in 4000 parts of water for 1/2 hour. A deep black is created.

Example 7 100 parts of wool are mixed in a bath of 3 parts 2. 6-di- (q.-amino-2-sulfophenylamino-) naphthalene (colorless compound, its aqueous solution with alkaline oxidizing agents a blue-red color, with acidic oxidizing agents a dark green precipitate there), To parts of sodium sulfate, q. Parts of sulfuric acid and q, ooo parts of water at the boiling point for 1 hour and in the same bath after adding 15 parts of potassium dichromate treated for another 1/2 hour. A deep dark green color arises.

Example 8 100 parts of weighted silk are used in a bath of 16 Share q.-aminosulfophenyl-2-naphthylamine (colorless compound obtained from the concentrated aqueous solution is precipitated by sodium chloride and its solution is upon standing turns blue in air), 15 parts of acetic acid, to "parts of sodium sulfate in 4ooo Parts of boiling hot water treated, rinsed and chromed for one hour: it is created a full blue black.

Claims (1)

PATENT CLAIM: Process for dyeing animal fibers, characterized in that that this with sulfated derivatives of i # q.-diaminobenzene or i # 4-Di (q.-aminophenylamino-) benzene, which has an unsubstituted on both amino groups or carry substituted naphthyl radical or only in one amino group by one such Naphthylrest are substituted, while the other amino group is unsubstituted or can be substituted in any way, or also sulfated, in one or both Amino groups substituted by aryl derivatives of diammonaphthalenes and then- treated with oxidizing agents.