DE1469797A1 - Process for dyeing fibers of animal origin - Google Patents

Description

Rev! On Inc., Hew Yoi * k, N, Y, _t V.St.A. Process for dyeing pairs of animal origin

To invention relates to a process for dyeing v> n fibers of animal origin, in particular of human hair IEM, rai <2 methoxy 5 nitro- 1, A- phenylenediamines

The compound 2 is methoxy ~ 5-nitro-1,4 phenylene .. diamine bo'rannto For example, in the British pi 613 ί 10 the preparation of this compound; by Reduction of 2-amino-5-nitroanisole, diacetylated. ig des obtained 2 4iethoxy 1 - ^ - diamine, nitration and h'ntacstyi.i.erurif detailed described. In the British patent script It is not given that the connection to mono- (J uKo% ίο tion and coupling with a phenyldialkyli min

809813/1219

It is stated that the azo dyes obtained in this way are suitable for dyeing artificial cellulose fibers .

US Pat. No. 1 to 5,447 describes the use of ^: * oa "ffitrometadiaminoanisole" for dyeing groomed or unheated furs. The dyes are used in the presence of hydrogen peroxide to produce Gei-btö.- _: c. · ▼. There is no information about the position of the nitro group in the dye.

Surprisingly, it has now been found that 2-methoxy 5 ~ nitro ~ 1,4-phenyl iamin end alone in the absence of '■ Water atoffperoxyd for dyeing animal fibers, may in particular ▼ use on menachlichem hair. The dye can be used to dye cut hair prior to processing into hair styling parts, wigs and the like, or finished hair styling parts and wigs. Since digser dye with p-amino groups and a nitro group in ο division su an amino group has a very low toxicity , it can also be used to dye living hair without damage to the scalp.

BATH 8098 13/1219 BATH

The art ittdungsgeraaß dye used is sweckr.äßigcr vreiae in aqueous solution alone or in combination Rait Toggle · dyes whose iäum dyeing anicialiachen fiber "., Sun example of wool and hair of Mens marriage verwandet., Depending on the desired Farbiatensität, the dye in de :? Solution can be contained in cons ent rati ons up to saturation concentration .. If necessary, one can use 3 η of these solutions alcohol - · ■> ■ .-. · In order to improve the solubility of the dye oc \ e: -. * Its rapid dissolution in SUPPORT WATER

The aqueous solutions used for dyeing can be neutral or alkaline. The boats edging is made from solutions with a p8 V7ert ssv tables 7.5 and 8.5 _C Brlese :. ' However, area is not decisive "

It is known that the time for which the dye is kept in contact with the fiber to be dyed changes as a function of the desired depth of the coloring. For most fiber rich 25 to 50 minutes for a masi male coloration depth, and longer periods of time have not improved results for the sequence _e Selbstverstündlioh can wusentlioh kürsere 2s :! applied

In order to prevent the wetting of the r.u staining fibers, can iie ^ e-oenenfalli? Hotsrclttcl in d «n dye

'■ Π 9 8> .j / 12 19

be included · Hit fatty acid alkanolamides ^ for example Monoäthanolaaidstearat or the alkylphenylpolyäthojcyäthanolen available under the trade name "Iritone" were achieved particularly good results. The presence of these or other agents in the dye solutions is, however not decisive for the purposes of the invention

The following examples illustrate the invention without eie su restrict.

example 1

1/2 part by weight of 2-metho23r-5-nitrO '>> 1 _> 4-phenylenediaaine was dissolved in 2 parts by weight of alcohol and added to a mixture of 9195 parts by weight of water and 6 parts by weight of heating agent.

By padding this solution at room temperature full and all types of white, bleached or gray Meneohenhaar received a strong reddish-brown color » The dyeing was extremely resistant to moisture. Comparable natural-looking warm brown shades could be used so far only through the use of mixtures of dyes

8098 13/12 19 _bA d

* · 5

can be achieved with higher toxicity.

Example 2

Its series of aqueous solutions ranging from 0.2 to. 4 weight- $ pounds of Mixtures of various amounts of disperse blue No. 23 (1,4-Dl- (ß-äthylolamino) "anthraquinone) and of 2-nitro ~ p ~ pheny» Lenediamine in combination with 2 ~ methoxy-5-nitro "-1,4 ~ phenylenediamine were obtained by dissolving the dyes in about 2 to 5 Share alcohol and make up to 100 parts with water. Samples of wool and menaohon hair were dyed with these solutions at room temperature. Various beige tones and dark blonde tones were obtained, the looked much more natural than similar shades obtained with known dye combinations.

809813/1219

Claims (1)

U69797 - 6 - claim A method of dyeing sum animal fibers, in particular hair Henschleben, characterized in that the fibers are treated with an aqueous solution containing 2-methoxy-5-nitro-containing = ~ 1.4 ~ phenylenediamine BATH 809813/1219