METHOD FOR THE COSMETIC TREATMENT OF KERATIN FIBRES COMPRISING A STAGE OF APPLICATION OF A RARE EARTH METAL COMPOSITION AND A STAGE OF APPLICATION OF A COMPOSITION COMPRISING SURFACTANTS

Abstract

The invention relates to a method for the cosmetic treatment of keratin fibres, in particular human keratin fibres, such as the hair, comprising a stage of application of a composition comprising at least one metal compound, the metal of which belongs to the group of the rare earth metals, and then a stage of application of a shampoo comprising at least one surfactant.

Claims

1. Method for the cosmetic treatment of keratin fibres, in particular human keratin fibres, such as the hair, comprising: i) a stage of application, to a part of the said keratin fibres intended to be shaped, of a composition comprising one or more metal compounds, the metal of which belongs to the group of the rare earth metals, followed by ii) a stage of application, to the keratin fibres, of a shampoo comprising one or more surfactants.

2. Method for the treatment of keratin fibres according to claim 1, characterized in that the metal belonging to the group of the rare earth metals is chosen from cerium, yttrium, ytterbium, lanthanum and europium.

3. Method according to claim 1, characterized in that the metal belonging to the group of the rare earth metals is in the +III oxidation state.

4. Method for the treatment of keratin fibres according to claim 1, characterized in that the compound of a metal belonging to the group of the rare earth metals is chosen from salts of rare earth metals, complexes of rare earth metals or oxides of rare earth metals.

5. Method for the treatment of keratin fibres according to claim 1, characterized in that the metal compound(s) are chosen from compounds combined with a monoatomic or non-monoatomic monoanionic ion, compounds combined with a di- or trianionic ion, compounds combined with a ligand comprising one or more groups forming a coordination bond and a functional group forming an ionic bond, oxides of rare earth metals, and their mixtures; preferably from yttrium dihydroxyacetate, cerium chloride, yttrium chloride, lanthanum chloride, Ce(acetonate).sub.3, cerium oxide, lanthanum oxide, yttrium oxide, erbium oxide, scandium oxide, ytterbium oxide, europium oxide, and their mixtures.

6. Method for the treatment of keratin fibres according to claim 1, characterized in that the metal compound(s) are present in a content ranging from 0.05% to 25% by weight, preferably from 0.5% to 15% by weight, with respect to the total weight of the composition.

7. Method for the treatment of keratin fibres according to claim 1, characterized in that the composition applied in stage i) exhibits an acidic pH, preferably of less than or equal to 7, more preferentially of less than or equal to 5.5, and greater than 3.

8. Method for the treatment of keratin fibres according to claim 1, characterized in that the shampoo applied in stage ii) comprises one or more surfactants chosen from anionic, non-ionic, amphoteric or zwitterionic surfactants, and their mixtures, preferably chosen from alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkyl sulfosuccinates, alkyl ether sulfosuccinates and acyl isethionates, alkylpolyglucosides, (C.sub.8-C.sub.20)alkyl betaines and (C.sub.8-C.sub.20)alkylamido (C.sub.1-C.sub.6)alkyl betaines, and their mixtures.

9. Method for the treatment of keratin fibres according to claim 1, characterized in that the shampoo applied in stage ii) comprises a total content of surfactants ranging from 1% to 40% by weight, preferably from 2% to 20% by weight, with respect to the total weight of the composition.

10. Method for the treatment of keratin fibres according to claim 1, characterized in that the composition applied in stage i) additionally comprises one or more surfactants chosen from anionic, non-ionic, amphoteric or zwitterionic surfactants, and their mixtures.

11. Method for the treatment of keratin fibres according to claim 1, characterized in that it employs, before stage i) or between stages i) and ii), a stage of shaping the keratin fibres.

12. Method for the treatment of keratin fibres according to claim 10, characterized in that the shaping is carried out by means of a brush, of a hairdryer, of heating tongs (160-230° C.), of hairsetting rollers or more simply with the hands.

13. Method for the treatment of keratin fibres according to claim 1, characterized in that stage ii) is followed by one or more stages iii) of treatment of the keratin fibres, spaced out in time, making it possible to regain the initial shaping of the fibres treated by the composition of stage i); preferably, this stage of treatment of the keratin fibres consists in brushing the said fibres or in drying the said fibres.

14. Method for the treatment of keratin fibres according to claim 13, characterized in that a shampooing is carried out between two stages iii) spaced out in time.

15. Method for the treatment of keratin fibres according to claim 1, characterized in that stage i) is preceded by a stage of shaping and/or styling the keratin fibres.

16. Multicompartment kit for the treatment of keratin fibres, in particular human keratin fibres, such as the hair, comprising a first compartment containing a composition comprising one or more metal compounds, the metal of which belongs to the group of the rare earth metals, as defined according to claim 1, and a second compartment containing a shampoo comprising one or more surfactants.

Description

EXAMPLES

[0225] In the examples which follow, all the amounts are given, unless otherwise indicated, as percentage by weight of active material (AM), with respect to the total weight of the composition.

Example 1

Compositions A1, A2 and B1 to B3 were prepared from the ingredients, the contents of which are shown as active material in the tables below:

[0226]

TABLE-US-00001 TABLE 1 Compositions A Ingredients A1 A2 Yttrium hydroxyacetate 10 1 Water q.s. for 100 q.s. for 100

TABLE-US-00002 TABLE 2 Compositions B Ingredients B1 B2 B3 Coco glucoside.sup.1 5 (AM) Coco betaine — 5 (AM) — at 30% in water.sup.2 Sodium laureth sulfate at — — 5% (AM) 70% in water.sup.3 Water q.s. for 100 q.s. for 100 q.s. for 100 .sup.1sold under the name Plantacare 818 UP by BASF .sup.2sold under the name Dehyton AB 30 by BASF .sup.3sold under the name Texapon AOS 225 UP by BASF

[0227] For the above example, use is made of a malleable head with a head of hair of Caucasian hairs and a mid-length haircut With this head of hair and hairstyle, the dry hairs overall assume an arrangement such that the hairs follow gravity. Using a brush, a part of the head of hair is shaped, namely the hairs of the sides. This shaping brings the hairs to be orthogonal overall to gravity. At this stage, the shape given is weak and care is taken not to move the head in order to maintain it.

[0228] The parts shaped (that is to say, the hairs on the sides) are subsequently treated with the compositions A1 or A2, 3 g of composition being localized, by virtue of a pump-action spray, at the places which it is desired to subsequently style, these being maintained in a position orthogonal to the direction of the natural hairs before styling (direction of gravity).

[0229] Without waiting for the drying, the hairs are subsequently washed with the compositions B1, B2 or B3. The compositions are, with the water which is added during the shampooing, distributed over the whole of the head of hair. The whole of the head of hair is then subjected to a final rinsing. During the rinsing, under the effect of gravity and then after disentangling, the hairs assume a position parallel overall to gravity close to the initial position before shaping. The hairs are subsequently dried under the effect of a hairdryer without shaping but while carrying out combing, from the bottom upwards, parallel to gravity. Once dry, the hairs are parallel overall to gravity.

[0230] The possibility of restyling the hairs, that is to say of regaining the shaping carried out beforehand, is graded from 0 (very low possibility of shaping) to 10 (strong possibility of shaping).

[0231] To do this, the hairs are combed in a way non-parallel to gravity. In order to make sure that the shape is indeed given, a comb is run through the hair, the comb is removed and then the malleable head is rotated by 15° to the right and then 15° to the left. Either the shape given by running the comb through the hair is maintained, or the shape given is lost and the hairs again end up parallel to gravity.

[0232] When the shape is maintained after a comb has been run through the hair and the comb has been removed, a grade of 10 is given.

[0233] When the shape is lost at the actual time when the comb is removed, even without having to rotate the malleable head, a grade of 0 is given.

[0234] When the shape is given but the hairs partially hang down in the direction of gravity, an intermediate grade is given.

[0235] The results shown in the table below are mean results for retention of the shape as shown above obtained from the evaluation by several subjects.

TABLE-US-00003 TABLE 3 Compositions Composition B A B1 B2 B3 A1 8 9 10 A2 7 7 8

[0236] The method according to the invention in the form of a treatment comprising a stage of pretreatment i) with a composition comprising rare earth metals, followed by a stage of washing ii) with a shampoo, makes it possible to easily reproduce the hairstyle produced beforehand.

[0237] An impression of stronger hairs is noted visually, owing to the fact that the head of hair is put into a shape where not all the hairs follow the vertical.

[0238] It is also noted that, when the head of hair is touched, the hairs become individual and the shape can be put back into place by the simple effect of the fingers or of running a comb quickly through the hair. These effects, related to the shape, without exhibiting a welding effect, contribute to the impression that the hairs are stronger.

[0239] The same test as above is carried out, this time performing three washing operations with the compositions B1, B2 or B3. The results are shown in the table below.

TABLE-US-00004 TABLE 4 Compositions Composition B A B1 B2 B3 A1 7 7 8 A2 5 6 7

[0240] This method employed according to the invention is also lasting since it makes it possible to easily reproduce the hairstyle produced beforehand, even after three washing operations.

[0241] As above, the same impression exists of stronger hairs. The fact that the possibility of shaping endures after 3 shampooing operations accentuates the impression of having stronger hairs.

Example 2

[0242] Compositions A3, A4 and A5 were prepared from ingredients, the contents of which are shown as active material in the tables below:

TABLE-US-00005 TABLE 5 Compositions A Ingredients A3 A4 A5 Lanthanum chloride 10% 10% — heptahydrate Yttrium — — 10% hydroxy acetate hexahydrate Coco betaine 5% AM — — at 30% in water.sup.2 Sodium laureth sulfate — 5% AM — at 70% in water.sup.3 Coco glucoside.sup.1 — — 5% AM Water q.s. for 100 q.s. for 100 q.s. for 100 .sup.1sold under the name Plantacare 818 UP by BASF .sup.2sold under the name Dehyton AB 30 by BASF .sup.3sold under the name Texapon AOS 225 UP by BASF

[0243] A head of hair of Caucasian hairs is prepared as described in Example 1. The parts shaped (thus on the sides) are subsequently treated with the compositions A3 or A4 or A5, 2.5 grams being localized, by hand, at the places which it is subsequently intended to style and the hairs then being massaged so as to produce a foam. The whole of the head of hair is rinsed. The hairs are left and dry in the open air.

[0244] The next day, the hairs of the head of hair are washed with the compositions B1, B2 or B3. A final rinsing is then carried out on the whole of the head of hair.

[0245] During the rinsing, under the effect of gravity and then after disentangling, the hairs assume a position parallel overall to gravity. The hairs are subsequently dried with a hairdryer without carrying out shaping.

[0246] The same evaluation as described in Example 1 is carried out, leading to the following results:

TABLE-US-00006 TABLE 6 Compositions Composition B A B1 B2 B3 A3 8 6 6 A4 8 6 6 A5 7 7 8

[0247] The method employed according to the invention in the form of a treatment comprising two successive stages i) and ii) of washing with two different shampoos makes it possible to easily reproduce the hairstyle produced beforehand. It exhibits the advantage of being able to define one day an effect of shaping a head of hair, for example with the help of a specialist, such as a hairdresser, and then, the next day, to put the head of hair into shape in person without particular skill.

[0248] The same test as above is carried out, this time performing three washing operations with the compositions B1, B2 or B3 described in Example 1. The results are shown in the table below.

TABLE-US-00007 TABLE 7 Compositions Composition B A B1 B2 B3 A3 7 4 4 A4 8 4 4 A5 7 6 7

[0249] This method employed according to the invention is also lasting since it makes it possible to easily reproduce the hairstyle produced beforehand, even after three washing operations.