WO1996018376A1

WO1996018376A1 - Two-component natural hair dye

Info

Publication number: WO1996018376A1
Application number: PCT/EP1995/004766
Authority: WO
Inventors: Klaus Kirchmayr; Horst Höffkes
Original assignee: Henkel Kommanditgesellschaft Auf Aktien
Priority date: 1994-12-13
Filing date: 1995-12-04
Publication date: 1996-06-20
Also published as: GB9425118D0

Abstract

The invention pertains to a hair dyeing process that uses a two-component hair dye consisting of components (A) and (B) which are packaged separately but combined in one sales unit, component (A) comprising vegetable matter with soluble dyestuff content in a water-insoluble but at least partially water-permeable packet and component (B) comprising at least one thickener for aqueous media. The water-permeably packed component (A) is introduced into a predetermined quantity of an aqueous medium until the dye has dissolved; then the thickener (B) is added to the dye solution. The ready-to-use dye preparation thus obtained is applied directly to the hair and rinsed out after a period of setting.

Description

'Two component natural hair dye1 "

The invention relates to a new process for coloring hair using natural hair colorants, preferably coloring plant parts, and a hair colorant suitable for this process, consisting of a sales unit consisting of two separately packaged components, one of which coloring plant parts and the other a thickener includes.

Herbal hair dyes have long been known for temporary hair coloring. Powdered parts of plants from strongly coloring plants such as e.g. Henna or indigo leaves are used, which are mixed with water and, if appropriate, fillers and thickeners to give coloring pastes which are applied to the hair.

This well-known cataplasma process has the disadvantage that the dye powders have to be ground very finely in order to produce a uniform color on the hair. In addition, water-insoluble constituents remain on the hair which are difficult to wash out completely. Fine grinding of the dyes also has the disadvantage that undesirable dust development occurs during manufacture and processing. Attempts have also already been made to extract natural dyes from the plant parts and to incorporate the extracts into coloring preparations. Such dyes isolated from the plant are very unstable with respect to the effects of oxygen and light and are therefore not suitable for the production of storable preparations.

A hair dyeing process was therefore sought which avoids the disadvantages of the known natural hair dyeing processes.

The invention relates to a two-component natural hair dye consisting of a sales unit with two separately packaged components (A) and (B), the component

(A) parts of plants which give off dyes soluble in aqueous medium, in a water-insoluble packaging, the wall of which at least partially consists of porous material which is permeable to water and dissolved dyes, and the component

(B) comprises at least one separately packaged aqueous media thickener.

The process according to the invention for coloring the hair using the abovementioned two-component hair colorants is distinguished by the fact that parts of the plant which give off dyes which are soluble in an aqueous medium are in a water-insoluble packaging, the walls of which are at least partially made of porous dyes for water and dissolved dyes permeable material consists (component A) in a predetermined amount of an aqueous medium and, if necessary with agitation, remains in it until the desired amount of dye is dissolved, then the aqueous dye solution contains a water-soluble thickener (component B) in an amount zu¬ sets, which gives this a suitable for application to the hair viscosity, and finally applies the thickened dye solution to the hair and rinses the colored hair with water after an exposure time. This process according to the invention ensures that no insoluble parts of the plant get onto the hair and that the dyeing is carried out using a freshly prepared dye extract which has not yet suffered from oxidative degradation and has not undergone photochemical decomposition.

According to the invention, all strongly coloring plants or parts of plants are suitable for producing component (A) of the two-component natural hair dye. Examples of such plants or parts of plants are:

Henna (Lawsonia iner is or Lawsonia alba leaves)

Indigo (leaves of Indigofera argentea)

Chamomile flowers

Blue wood

Redwood

sandalwood

Walnut (leaves and shells)

Gall apples

Cassia

black tea

Coloring broom

Woad

Rapeseed flower

Rotten tree bark

Turmeric

Elderberry

Beetroot

sage

Rhubarb root.

Numerous other plants are suitable as dye carriers for the preparation of the hair colorants according to the invention. In addition to the shredded parts of plants can also contain other dye carriers, for example cochineal, peat or other coloring natural substances.

The plant parts of component (A) are preferably in the form of dried powders of henna, indigo, cassia, black tea, chamomile flowers, beetroot, elderberries, rot tree bark, blue wood, redwood, curcuma, sage or rhubarb root.

The plants or parts of plants to be used only need to be roughly crushed, but finely ground powders are also suitable. Dusting cannot occur during use because the plant parts remain in the packaging. Plant parts which have a particle size of 1 μm to 1 mm are preferred. Due to the large surface area, finer powders are less stable in storage, coarser parts of plants take a longer time to remove the dye.

Any water-resistant packaging material is suitable as water-insoluble packaging, irrespective of whether it is rigid or flexible, whether made of water-resistant paper, plastic or textile. However, it is important that the wall consists at least partially of porous material. The packaging of component (A) is preferably a flexible bag made of a waterproof but fine-pored paper (e.g. hot filter paper), nonwoven fabric or textile fabric. Suitable paper bags are e.g. known for the preparation of tea (so-called tea bags).

With regard to the pore size, it should be noted that undissolved plant material cannot pass through the pores, so the pore size should in any case be smaller than the particle size of the fine fraction of the plant parts used. In contrast, the packaging material should be slightly permeable to the dissolved dyes be so that the process of removing the dyes can proceed as quickly as possible.

In addition to the more or less shredded plant parts, the water-insoluble packaging of component (A) may also contain other water-soluble auxiliaries which relate to the process of leaching out the dyes, the formation of brilliant dyeings, the dyeing onto the keratin fiber or the stability of the dyeing solution and improve the dye on the hair. Such aids can e.g. pH adjusting agents or buffer substances which give the dye solution the pH at which the dye is most intensive. Suitable products are primarily e.g. Fruit acids, e.g. Citric acid or tartaric acid and its salts.

Other suitable auxiliaries that can be packed with the plant parts of component (A) are e.g. water soluble antioxidants, e.g. Ascorbic acid, water-soluble hydrotropes or salts such as e.g. Urea, protein hydrolyzates, ammonium sulfate or ammonium lactate and surfactants, e.g. powdery wetting agents such as Saponins or synthetic surfactants.

The second, separately packaged component (B) contains at least one water-soluble thickener. Both a solid and a liquid thickener can be used. No particular requirements are to be placed on the packaging of component (B) except that it should sufficiently include the respective thickener. If as a thickener e.g. If an aqueous or other liquid preparation is selected, the packaging must be watertight and, if necessary, stable against the solvents it contains.

As a thickener (B), any thickener can be used. aqueous media suitable and physiologically compatible thickeners be used. Both water-insoluble swelling agents such as layered silicates or colloidal thickening silicas are suitable, as are water-soluble organic hydrocolloids, for example natural rubber and biopolymers, and synthetic water-soluble polymers.

Furthermore, e.g. emulsifiable fat components or emulsion concentrates, which are converted into a viscous emulsion by stirring into the aqueous dye solution.

Preferred suitable thickeners for carrying out the present invention are, however, the organic natural products from the group of guar flour, locust bean gum, gum arabic, alginates, water-soluble starch, pectin, gelatin or biopolymers such as e.g. Xanthan gum.

Other suitable natural product derivatives are e.g. the water-soluble cellulose, starch or guar derivatives, e.g. Methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, carboxyethyl starch, hydroxypropyl guar and others.

To produce the ready-to-use hair dye preparation from components (A) and (B), these are preferably combined in one sales unit. The amounts of components (A) and (B) are matched to one another in such a way that, with a given amount of water, both the desired dye concentration for hair coloring and the suitable viscosity of the coloring solution for application to the hair, e.g. is achieved with a coloring brush.

The concentration of the dye in the coloring solution and thus the intensity of the hair coloring can also be controlled by the user by limiting the amount of dissolved dye by a shorter dissolving time. Te The amount of thickener in the separately packaged Komponen¬ (B) should be such that the ge according to instructions ready Haarfärbezubereitung produced a viscosity in the range of 5 to 50 Pa ^»s (20 ° C) (measured at a shear stress ( D) of 3 see " ¹ , for example in the Haake rotation viscometer type RV12 / MV1). Preferred furthermore are those thickeners which, in addition to the viscosity mentioned, produce a certain thixotropy which promotes adhesion of the dye preparation applied to the hair and the running down of the Colorant and an undesirable skin staining prevented.

In addition to the thickener, other auxiliaries of component B can also be added, e.g. facilitate the dissolvability of the thickener or favorably influence the theological properties of the ready-to-use hair dye preparation. Finally, fragrances, deodorants, hair cosmetic agents and preservatives can also be added.

In general, it should be sufficient to provide 50 to 100 g of water and 0.5 to 5 g of a water-soluble hydrocolloid per 10 to 20 g of the plant material for the production of a ready-to-use hair dye preparation.

To produce the ready-to-use preparation, the packaging with the plant parts (component A) is preferably poured with boiling hot water so that the dyes are dissolved as quickly and completely as possible. Then either the solution or the dye container is moved so that the dissolving process is further promoted. If you want to achieve the deepest possible color, leave the dye container in the solution until it cools to room temperature (20 ° C). However, by prematurely removing the dye container, the extraction process of the dyes can be limited and a weaker coloring can be achieved in this way. The thickening agent is preferably added only after the dyeing solution has cooled, since gel clumps which are difficult to dissolve easily form in the hot solution.

After the thickener has been added, the coloring preparation must be homogenized by stirring until the thickener has been completely distributed or dissolved and the desired final viscosity has been reached.

The ready-to-use preparation is applied to the hair by the method customary for hair coloring, preferably using a brush. The applied preparation is then left to act until the dye is applied to the hair. Since the dyeing preparation contains no incompatible components, e.g. no longer contains insoluble residues, you can extend the exposure time as long as you like and e.g. let the preparation take effect overnight.

Usually, however, an exposure time of 10 to 60 minutes should be sufficient to achieve a good color.

The following examples are intended to describe the subject matter of the invention in more detail:

Examples

The following dye powders or powder mixtures were produced and filled into conventional tea bags in amounts of 5 g each.

Recipe 1 2 3 4

Henna, red 100 50-10

Henna, black 50

Henna, neutral - - 100 60

Black tea 20

Chamomile flowers 10

In each case 4 tea bags (20 g plant powder) were poured with 100 ml of boiling water in a beaker and left for 30 minutes. The water took on a deep color.

The bags were then removed from the solution and the dye solutions, which had meanwhile cooled to 20 ° C., were converted into ready-to-use coloring gels by adding 2.0 g of guar gum each time and stirring.

The coloring gels were applied to light blonde hair with the help of a coloring brush. After an exposure time of 45 minutes at 20 ° C., the colored hair tresses were rinsed off with water and dried.

The following colorations were obtained: Recipe 1 strong red-orange recipe 2 light reddish brown recipe 3 wheat blonde recipe 4 golden blonde.

Claims

claims

1. Two-component hair dye composition consisting of two separately packaged components (A) and (B), component (A) comprising parts of the plant which give off dyes soluble in aqueous medium in a water-insoluble packaging, the wall of which is at least partially made of porous , consists of water and dissolved dyes permeable material, and component (B) comprises at least one separately packaged thickener for aqueous media.

2. Hair dye according to claim 1, characterized in that the plant parts of component (A) in the form of dried powders of henna, indigo, cassia, black tea, chamomile flowers, beetroot, elderberries, rot tree bark, blue wood, redwood, curcu a, sage or Rhubarb roots are present.

3. Hair dye according to claim 1 or 2, characterized in that the water-insoluble packaging of component (A) is a flexible bag made of a waterproof but fine-pored paper, nonwoven or textile fabric.

4. Hair dye according to one of claims 1 to 3, characterized ge indicates that as a thickener (component B) an organic natural product from the group guar flour, locust bean gum flour gum arabic, alginate, water-soluble starch, pectin, gelatin or a biopolymer is included.

5. A process for dyeing hair, characterized in that plant parts which give off dyes soluble in an aqueous medium, in a water-insoluble package, the wall of which consists at least partially of fine-pored material which is permeable to dissolved dyes (component A), introduces it into a predetermined amount of an aqueous medium and, if necessary with agitation, leaves it in until the desired amount of dye has been dissolved out, then in the aqueous dye solution Adds thickener for aqueous media (component B) in an amount which gives it a viscosity suitable for application to the hair, and finally applies the thickened dye solution to the hair and rinses the dyed hair with water after an exposure time.