US992947A - Process of dyeing hairs, furs, and the like. - Google Patents

Description

' No Drawing.

UNITED sTAr s PATENT OFFICE.

ARNOLD ERLEITBAOH, OF DESS AU, GERMANY, ASSIGNOR TO ACTIEN GESELLS OHAFT I FUR ANILIN FABRIKATION, OF BERLIN, GERMANY.

rnocnss or DYEING HAIBS, runs, AND THE LIKE.

To all whom it may concern:

Be it known that'I, ARNOLD ERLENBAOH, a subject of the Kingof Bavaria, residing at De'ssau, Germany, my post-oflice address being 'Schillerstrasse '5, Dessau, Germany, have invented certain new and useful Improvements in Processes of Dyeing Hairs,

' Furs, and the Like, of which the following is a specification.

combination with an oxidizing agent, such f as hydrogen peroxid.- The latter para-diamin has extensively been applied in dyeing furs and the furs dyed with this base whether with or without the aid of a metal salt as a mordant exhibit a coal black shade, but the shade lacks the bluish tint generally demanded and imparting a bloom to the dyeing.- In order to improve the tints obtained by the foregoing way one has also used a mixture of para-phenylenediamin and of certain meta-diamins, such asfor instance meta phenylenediamin or meta toluylenediamin. Although by oxidation of these bases together with para-phenylenediamin somewhat more bright and more blueblack tones are obtainable, the dyeings are unstable; when the dyed goods are stored the dyeing assumes after some time a redbrown shade. Now I have made the very surprising observation that the aforesaid objections do not occur if instead of the above named meta diamins meta-diaminoanisol (OGH z NH NH '=1 2 4) or diaminophenetol (OC H NH NH =1 2 t) are used. Thus I obtain in this new manner on hairs, furs .and the like bright blue-black tones of great stability. For instance I apply to the furs a solution which contains in suitable proportions para-phenylenediamin, meta-diamino-anisol and a suitable oxidizing agent, such as hydrogen peroxid; Similar results are also obtained if according to my new process a suitable derivative of para-phenylenediamin, such as para-toluylenediamin, chloro --para phenylenediamin, methoxy-para-phenylenediamin and the like are employed instead of para-phenylcnediamin; thus I produce very useful, brilliant blue-black dyeings of a great stability.

The following examples illustrate my inventlon, the parts being by weight: w

1. 3 parts of para-phenylenediamin and 2 parts of diamino-anisol are dissolved in 500 parts of boiling hot water and 400 parts of cold water and 100 parts of hydrogen perox1d of 3 per cent. strength are added. The previously washed furs are introduced into the bath, cooled to 30-35" C. and handled therein for 612 hours; they are then washed and dried. In this manner intense blue black colored furs are obtained a solution of p'yrolignite of iron (contain- Specification of Letters latent. Patented lllay 2 3, 1911.

Application filed April 9, 1910. Serial No. 554,515.

2. The washed furs are mordanted with I ing 20 grams of the commercial pyrolignite of iron per liter) over night; they are then washed and dyed for about 12 hours in a bath which contains per liter 4.2 parts of para-phenylenediamin, 2.8 parts of di-.

amino-anisol and 140 parts of hydrogen peroxid of 3 per cent. strength. The dyeings obtained according to this example are more deep black than those obtained according to Example 1, but possess likewise the beautiful bluish shade.

Of course my-present invention is not limited to the foregoing examples or to the details given therein. Thus for instance instead of diamino-anisol the corresponding diamino-phenetol may be employed; furthermore for para-phenylenediamin may be substituted chloro-para-phenylenediamin, para-toluylenediamin, methoxypara-phenylenediamin and the like. It is obvious that in using such another para- ,diamin, or in substituting meta-diaminophenetol for the meta-diamino-anisol employed in the above example, the proportions of the ingredients as well as the duration of the dyeing, or of'the 'mordanting process, may be varied in order to obtain the best results. Also the special conditions of the dyeing process, or of the mordanting process, depend to agreat deal upon the. special nature of the hairs or the furs, etc., to be dyed as well as of the desired shade.

Finally instead of hydrogen peroxid any other oxidizing agent suitable for the purpose of my present invention may be used.

Having now described my invention and the manner in which it may be performed, what I claim is,

1. The hereinbefore described process for dyeing hirsutical material, which consists in applying to the hairs or furs or the like a solution containing an aromatic para-diamin of the general formula:

' NH, 1 cim nm 4 R in which formula R means a substituent, an aromatic meta-diamin of the general formula R C NH: (2) NH: (4)

15 group and'an oxidizing agent.

2. The hereindescribed process for dyeing hirsutical material, which consists in applying to the hirsutical material a solution containing para-phenylenediamin, metadiamin-anisol and an oxidizing agent.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ARNOLD ERLENBACH.