WO2018108921A1

WO2018108921A1 - Multiphase conditioning composition whose effect is persistent on shampooing

Info

Publication number: WO2018108921A1
Application number: PCT/EP2017/082441
Authority: WO
Inventors: Audrey CORREIA; Estelle Mathonneau
Original assignee: L'oreal
Priority date: 2016-12-16
Filing date: 2017-12-12
Publication date: 2018-06-21
Also published as: FR3060332B1; FR3060332A1

Abstract

The invention relates to a multiphase composition comprising visually distinct phases, a first phase comprising one or more cationic surfactants, one or more non- silicone fatty substances and one or more silicones, and a second phase comprising one or more organosilanes other than silicones and one or more cationic polymers. The present invention also relates to a process for preparing such a composition. The invention also relates to a process for treating keratin fibres, in particular human keratin fibres such as the hair, which consists in applying this composition to said keratin fibres. Finally, a subject of the invention is the use of this composition for giving keratin fibres, in particular human keratin fibres such as the hair, cosmetic care that is persistent on shampooing.

Description

Multiphase conditioning composition whose effect is persistent on shampooing

The invention relates to a multiphase composition comprising visually distinct phases, a first phase comprising one or more cationic surfactants, one or more non-silicone fatty substances and one or more silicones, and a second phase comprising one or more organosilanes other than silicones and one or more cationic polymers.

The invention also relates to a process for preparing such a composition.

The invention also relates to a process for treating keratin fibres, in particular human keratin fibres such as the hair, which consists in applying this composition to said keratin fibres.

Finally, the invention relates to the use of this composition for giving keratin fibres, in particular human keratin fibres such as the hair, cosmetic care that is persistent on shampooing.

Hair is generally damaged and embrittled by the action of external atmospheric agents such as light and bad weather, and by mechanical or chemical treatments, such as brushing, combing, dyeing, bleaching, permanent- waving and/or relaxing.

Thus, in order to remedy these drawbacks, it is now common practice to pursue haircare treatments involving the use of care compositions that condition the hair after these treatments to give it in particular sheen, softness, suppleness, lightness, a natural feel and disentangling properties.

These haircare compositions may be, for example, conditioning shampoos or compositions to be applied before or after washing with shampoo, and may be in the form of gels, hair lotions or creams of varying thickness.

It is known, in order to improve the cosmetic properties of these compositions, to introduce therein cosmetic agents, known as conditioning agents, intended mainly to repair or to limit the harmful or undesirable effects brought about by the various treatments or attacks to which hair fibres are more or less repeatedly subjected. With this aim, it has already been proposed to use, inter alia, organosilicon compounds (or organosilanes) in cosmetic care compositions, to give hair satisfactory conditioning properties.

Such compositions are described, for example, in patent applications FR 2910276, EP 2343042 and EP 2111848.

However, the care compositions described in the prior art afford conditioning and disentangling properties that are not sufficiently long-lasting. Specifically, these properties generally do not sufficiently resist washing and tend to diminish from the first shampoo wash.

To overcome this drawback, it is known practice to use several cosmetic compositions in succession: a care composition to give the hair conditioning properties and a care-persistence composition which will enable these conditioning properties to be conserved after several shampoo washes. In particular, these compositions may be applied sequentially, without intermediate rinsing, i.e. by "layering".

However, this technique requires the user to apply successively at least two care compositions, which may be long and generally considered tedious by consumers.

Thus, there is a real need to provide a cosmetic care composition for keratin fibres, in particular human keratin fibres such as the hair, which does not have the drawbacks mentioned above, i.e. which is especially capable of affording conditioning properties that are not only satisfactory but also persistent on washing, for example persistent for at least three shampoo washes, and which can do so in a single treatment step.

The Applicant has discovered, surprisingly, that a multiphase composition comprising at least two visually distinct phases, a first phase (i) comprising one or more cationic surfactants, one or more non-silicone fatty substances and one or more silicones, and a second phase (ii) comprising one or more organosilanes other than silicones and one or more cationic polymers, makes it possible to achieve the objectives outlined above.

One subject of the present invention is thus a multiphase composition comprising:

(i) a first phase comprising one or more cationic surfactants, one or more non-silicone fatty substances and one or more silicones, (ii) a second phase comprising one or more organosilanes other than silicones and one or more cationic polymers,

phases (i) and (ii) being visually distinct.

The composition according to the invention affords particularly satisfactory coating of the hair, and in particular gives it softness, suppleness, smoothness, lightness, volume, and a natural non-greasy, lightweight feel. This composition also affords hair an improved capacity for disentangling.

Moreover, the properties afforded by the composition according to the invention show good resistance to the various attacking factors to which hair may be subjected, such as light, bad weather, washing and perspiration. They are particularly persistent with respect to shampoo washing, especially after at least three shampoo washes.

Furthermore, the composition according to the invention has the advantage of being easy to apply while at the same time having a visual impact that consumers find very favourable.

In other words, the composition according to the invention has improved working qualities while at the same time having an attractive visual appearance.

According to an essential aspect of the invention, the two phases (i) and (ii) according to the invention are visually distinct.

Specifically, it was found that the performance qualities in terms of conditioning and persistence were greatly diminished or even lost if these two phases were intimately mixed in the composition according to the invention.

Furthermore, the presence of two visually distinct phases, and the process for manufacturing the composition according to the invention especially provide new textures with novel looks, for instance a "marbled" visual appearance.

Consequently, a subject of the invention is also a process for preparing a composition defined above, which comprises:

a) a step of preparing, separately from each other, the phases (i) and (ii) by mixing the constituents of each phase, and then

b) a step of placing phases (i) and (ii) in contact without intimate mixing thereof, in particular by means of one or more static mixers.

The invention also relates to a process for treating keratin fibres, in particular human keratin fibres such as the hair, which consists in applying this composition to said keratin fibres. Finally, a subject of the invention is the use of this composition for giving keratin fibres, in particular human keratin fibres such as the hair, cosmetic care that is persistent on shampooing.

Other subjects, characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the examples that follow.

In the text hereinbelow, and unless otherwise indicated, the limits of a range of values are included within that range, especially in the expressions "between" and "ranging from ... to

Moreover, the expressions "at least one" and "at least" used in the present description are equivalent to the expressions "one or more" and "greater than or equal to", respectively.

According to the present patent application, the term "keratin fibres" mainly denotes human keratin fibres and in particular the hair.

The composition according to the present invention has two phases that are visually distinct or more than two visually distinct phases, and preferably two visually distinct phases.

The term "visually distinct" means that the two phases (i) and (ii) may be distinguished from each other by a person's naked eye, unlike phases forming emulsions or dispersions of homogeneous particles. Thus, one of the two phases is not finely dispersed in the other, as is the case for emulsions.

Preferably, at least one of the two phases occupies zones forming marbling, preferably of more than 1 cm in length. Preferably, one of the two phases is not in the form of globules. More preferably, neither of the two phases is in the form of globules.

In contrast with the above definition, the term "intimate mixing" means that one of the two phases is finely dispersed in the other, as is the case for oil-in-water or water-in-oil emulsions or for complex emulsions. It is therefore not possible to distinguish the phases from each other by the naked eye.

Preferably, the two phases (i) and (ii) are visually distinct in a stable manner, i.e. the zones occupied by the two phases do not move in response to simple inverting of the container which contains them, when no other stress is applied to the composition. The two phases especially do not constitute two-phase liquids, in which two distinct phases occupy zones one above the other which mix together when the container is inverted. As indicated above, phase (i) of the composition according to the invention comprises one or more cationic surfactants.

The cationic surfactant(s)e used in the composition according to the invention may be chosen from optionally polyoxyalkylenated primary, secondary or tertiary fatty amine salts, quaternary ammonium salts, and mixtures thereof.

Preferably, the cationic surfactant(s) are chosen from quaternary ammonium salts.

Examples of quaternary ammonium salts that may especially be mentioned include:

- those corresponding to general formula (I) below:

NT X

^R9 R„

(I) in which

P 8 to Ri i , which may be identical or different, represent a linear or branched aliphatic group comprising from 1 to 30 carbon atoms or an aromatic group, such as aryl or alkylaryl, at least one of the groups Rs to Rn comprising from 8 to 30 carbon atoms and preferably from 12 to 24 carbon atoms.

X^" is an anion chosen from the group of halides, phosphates, acetates, lactates, (Ci-C4)alkylsulfates, (Ci-C4)alkylsulfo nates and (Ci-C4)alkyl-arylsulfonates.

The aliphatic groups may comprise heteroatoms especially such as oxygen, nitrogen, sulfur and halogens.

The aliphatic groups are chosen, for example, from C1-C30 alkyl, C1-C30 alkoxy, (C₂-C₆) polyoxyalkylene, C1-C30 alkylamide, (Ci2-C22)alkylamido(C2- C₆)alkyl, (Ci2-C22)alkyl acetate, and C1-C30 hydroxyalkyl groups.

Among the quaternary ammonium salts of formula (I), preference is given, firstly, to tetraalkylammonium chlorides, for instance dialkyldimethylammonium or alkyltrimethylammonium chlorides in which the alkyl group comprises from about 12 to 22 carbon atoms, in particular behenyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium chloride or benzyldimethylstearylammonium chloride, or else, secondly, to distearoylethylhydroxyethylmethylammonium methosulfate, dipalmitoylethylhydroxyethylammonium methosulfate or distearoylethylhydroxyethylammonium methosulfate, or else, finally, to palmitylamidopropyltrimethylammonium chloride or stearamidopropyldimethyl(myristyl acetate)ammonium chloride, sold under the name Ceraphyl® 70 by the company Van Dyk;

- quaternary ammonium salts of imidazoline, for instance those of formula (II) below:

(II) in which

Ri2 represents an alkenyl or alkyl group comprising from 8 to 30 carbon atoms, for example derived from tallow fatty acids,

Ri3 represents a hydrogen atom, a C₁-C4 alkyl group or an alkenyl or alkyl group comprising from 8 to 30 carbon atoms,

Ri4 represents a C₁-C4 alkyl group,

Ri5 represents a hydrogen atom or a C₁-C4 alkyl group,

Preferably, R12 and R13 denote a mixture of alkenyl or alkyl groups comprising from 12 to 21 carbon atoms, for example derived from tallow fatty acids, Ri4 denotes a methyl group and R15 denotes a hydrogen atom. Such a product is sold, for example, under the name Rewoquat® W 75 by the company Rewo;

- quaternary diammonium or triammonium salts, in particular of formula (III) below:

(III) in which

Ri6 denotes an alkyl group comprising approximately from 16 to 30 carbon atoms, which is optionally hydroxylated and/or interrupted with one or more oxygen atoms,

Ri7 is chosen from hydrogen, an alkyl group comprising from 1 to 4 carbon atoms or a group -(CH₂)₃-N⁺(Ri6a)(Ri7a)(Ri8a),

Ri6a, Ri7a, Ri8a, Ri8, Ri9, R₂o and R₂i, which may be identical or different, are chosen from hydrogen or an alkyl group comprising from 1 to 4 carbon atoms, and

X^" is an anion chosen from the group of halides, acetates, phosphates, nitrates, (Ci-C₄)alkyl sulfates, (Ci-C₄)alkyl- or (Ci-C₄)alkylarylsulfonates, in particular methyl sulfate and ethyl sulfate.

Such compounds are, for example, Finquat CT-P, available from Finetex (Quatemium 89), and Finquat CT, available from Finetex (Quatemium 75);

- quaternary ammonium salts containing one or more ester functions, for instance those of formula (IV) below:

in which:

R₂₂ is chosen from Ci-C₆ alkyl groups and Ci-C₆ hydroxyalkyl or dihydroxyalkyl groups,

R₂₃ is chosen fro the group - saturated or unsaturated, linear or branched C1-C22 hydrocarbon-based groups R27,

- a hydrogen atom,

R25 is chosen from:

o

- the group ^{R28 C} ,

- saturated or unsaturated, linear or branched Ci-C₆ hydrocarbon-based groups R₂₉,

- a hydrogen atom,

R24, R26 and R28, which may be identical or different, are chosen from saturated or unsaturated, linear or branched C7-C21 hydrocarbon-based groups,

r, s and t, which may be identical or different, are integers ranging from 2 to

6,

rl and tl, which may be identical or different, are equal to 0 or 1, r2 + rl = 2 r and tl + 12 = 2 t,

y is an integer ranging from 1 to 10,

x and z, which may be identical or different, are integers ranging from 0 to

10,

X^" is a simple or complex, organic or inorganic anion,

with the proviso that the sum x + y + z is from 1 to 15, that when x is 0 then R23 denotes R27, and that when z is 0 then R₂₅ denotes R29.

The alkyl groups R22 may be linear or branched, and more particularly linear.

Preferably, R22 denotes a methyl, ethyl, hydroxyethyl or dihydroxypropyl group, and more particularly a methyl or ethyl group.

Advantageously, the sum x + y + z ranges from 1 to 10.

When R23 is a hydrocarbon-based group R27, it may be long and contain from 12 to 22 carbon atoms, or may be short and contain from 1 to 3 carbon atoms.

When R25 is a hydrocarbon-based group R29, it preferably contains 1 to 3 carbon atoms.

Advantageously, R24, R26 and R28, which may be identical or different, are chosen from linear or branched, saturated or unsaturated C11-C21 hydrocarbon-based groups, and more particularly from linear or branched, saturated or unsaturated Cn- C21 alkyl and alkenyl groups. Preferably, x and z, which may be identical or different, are equal to 0 or 1. Advantageously, y is equal to 1.

Preferably, r, s and t, which may be identical or different, are equal to 2 or 3, and even more particularly are equal to 2.

The anion X^" is preferably a halide, preferably chloride, bromide or iodide, a

(Ci-C4)alkyl sulfate, or a (Ci-C4)alkylsulfonate or (Ci-C4)alkylarylsulfonate. However, use may be made of methanesulfonate, phosphate, nitrate, tosylate, an anion derived from an organic acid, such as acetate or lactate, or any other anion that is compatible with the ammonium bearing an ester function.

The anion X^" is even more particularly chloride, methyl sulfate or ethyl sulfate.

Use is more particularly made, in the composition according to the invention, of the ammonium salts of formula (IV) in which:

- P 22 denotes a methyl or ethyl group,

- x and y are equal to 1,

- z is equal to 0 or 1 ,

- r, s and t are equal to 2,

- P 23 is chosen from:

O

p

- the group ²⁶ ,

- methyl, ethyl or C14-C22 hydrocarbon-based groups,

- a hydrogen atom,

- R25 is chosen from:

o

- the group ^{R28 C} ,

- a hydrogen atom,

- P 24, P 26 and R28, which may be identical or different, are chosen from linear or branched, saturated or unsaturated C13-C17 hydrocarbon-based groups, and preferably from linear or branched, saturated or unsaturated C13-C17 alkyl and alkenyl groups.

Advantageously, the hydrocarbon-based groups are linear.

Among the compounds of formula (IV), examples that may be mentioned include salts, especially the chloride or the methyl sulfate of diacyloxyethyldimethylammonium, diacyloxyethylhydroxyethylmethylammonium, monoacyloxyethyldihydroxyethylmethylammonium,

triacyloxyethylmethylammonium or monoacyloxyethylhydroxyethyldimethylammonium, and mixtures thereof. The acyl groups preferably contain 14 to 18 carbon atoms and are obtained more particularly from a plant oil such as palm oil or sunflower oil. When the compound contains several acyl groups, these groups may be identical or different.

These products are obtained, for example, by direct esterification of triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine, which are optionally oxyalkylenated, with fatty acids or with fatty acid mixtures of plant or animal origin, or by transesterification of the methyl esters thereof. This esterification is followed by a quaternization by means of an alkylating agent such as an alkyl halide, preferably a methyl or ethyl halide, a dialkyl sulfate, preferably a dimethyl or diethyl sulfate, methyl methanesulfonate, methyl para-toluenesulfonate, glycol chlorohydrin or glycerol chlorohydrin.

Such compounds are sold, for example, under the names Dehyquart® by the company Henkel, Stepanquat® by the company Stepan, Noxamium® by the company Ceca or Rewoquat® WE 18 by the company Rewo-Witco.

The composition according to the invention may contain, for example, a mixture of quaternary ammonium monoester, diester and triester salts with a weight majority of diester salts.

Use may also be made of the ammonium salts containing at least one ester functional group that are described in patents US-A-4 874 554 and US-A-4 137 180.

Use may also be made of behenoylhydroxypropyltrimethylammonium chloride, for example, sold by the company Kao under the name Quartamin BTC 131.

Preferably, the ammonium salts containing at least one ester function contain two ester functions.

Preferentially, the cationic surfactants are chosen from the quaternary ammonium salts of formula (I) as defined previously.

Among the cationic surfactants, it is more particularly preferred to choose cetyltrimethylammonium, behenyltrimethylammonium and dipalmitoylethylhydroxyethyl-methylammonium salts, and mixtures thereof, and more particularly the cationic surfactant(s) are chosen from behenyl- trimethylammonium chloride, cetyltrimethylammonium chloride, and dipalmitoylethyl-hydroxyethylammonium methosulfate, and mixtures thereof.

According to the invention, the above cationic surfactant(s) are present in the first phase (phase (i)) of the composition according to the invention.

However, they may also be present in the second phase (phase (ii)) of the composition according to the invention.

In one preferred mode of the invention, the second phase of the composition according to the invention also comprises one or more cationic surfactants such as those described above.

The cationic surfactant(s), whether they are in the first phase only or in the first phase and in the second phase of the composition according to the invention, generally represent from 0.05% to 20% by weight, preferably from 0.1% to 10% by weight and more preferentially from 0.5% to 5% by weight relative to the total weight of the composition.

The cationic surfactant(s) generally represent from 0.05% to 20% by weight, preferably from 0.1% to 10% by weight and more preferentially from 0.5% to 5% by weight relative to the total weight of phase (i).

When they are also present in phase (ii), the cationic surfactant(s) generally represent from 0.05%> to 20%> by weight, preferably from 0.1% to 10%> by weight and more preferentially from 0.5% to 5% by weight relative to the total weight of phase (ii).

As explained previously, phase (i) of the composition according to the invention comprises one or more non-silicone fatty substances, especially one or more solid non-silicone fatty substances.

The term "fatty substance" means an organic compound that is insoluble in water at room temperature (25°C) and at atmospheric pressure (1 atm), i.e. which has a solubility of less than 5% by weight, preferably less than 1% by weight. They are generally soluble, under the same temperature and pressure conditions, in organic solvents such as chloroform, ethanol, benzene, liquid petroleum jelly or decamethylcyclopentasiloxane.

The term "non-silicone fatty substance" means a fatty substance whose structure does not comprise any silicon atoms, and which therefore especially does not comprise any siloxane groups. They generally bear in their structure a hydrocarbon-based chain comprising at least 6 carbon atoms. Advantageously, they are not oxyalkylenated and do not contain any -COOH functions.

The term "solid fatty substance" means a fatty substance that is solid at room temperature and atmospheric pressure (25°C, 1 atm); they preferably have a viscosity of greater than 2 Pa.s, measured at 25°C and at a shear rate of 1 s^"1.

The non-silicone fatty substances, which are especially solid, that may be used in the context of the invention may be chosen from fatty alcohols, esters of a fatty acid and/or of a fatty alcohol, non-silicone waxes, ceramides, and mixtures thereof.

The term "fatty alcohol" means a long-chain aliphatic alcohol comprising from 8 to 40 carbon atoms and comprising at least one hydroxyl group OH. These fatty alcohols are neither oxyalkylenated nor glycerolated.

The solid fatty alcohols may be saturated or unsaturated, and linear or branched, and comprise from 8 to 40 carbon atoms. Preferably, the solid fatty alcohols have the structure R-OH with R denoting a linear alkyl group, optionally substituted with one or more hydroxyl groups, comprising from 8 to 40, better still from 10 to 30, or even from 12 to 24 and even better still from 14 to 22 carbon atoms.

The solid fatty alcohols that may be used are preferably chosen from saturated or unsaturated, linear or branched, preferably linear and saturated, (mono)alcohols comprising from 8 to 40 carbon atoms, better still from 10 to 30, or even from 12 to 24 atoms and better still from 14 to 22 carbon atoms.

The solid fatty alcohols that may be used may be chosen, alone or as a mixture, from:

- lauryl alcohol (or 1-dodecanol);

- myristyl alcohol (or 1-tetradecanol);

- cetyl alcohol (or 1-hexadecanol);

- stearyl alcohol (or 1-octadecanol);

- arachidyl alcohol (or 1-eicosanol);

- behenyl alcohol (or 1-docosanol);

- lignoceryl alcohol (or 1-tetracosanol);

- ceryl alcohol (or 1-hexacosanol);

- montanyl alcohol (or 1-octacosanol);

- myricyl alcohol (or 1-triacontanol). Preferentially, the solid fatty alcohol is chosen from cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and mixtures thereof, such as cetylstearyl alcohol or cetearyl alcohol.

The liquid fatty alcohols, in particular the C10-C34 alcohols, preferably have branched carbon-based chains or contain one or more, preferably 1 to 3, unsaturations. They are preferably branched and/or unsaturated, and comprise from 12 to 40 carbon atoms, and are non-oxyalkylenated and non-glycerolated.

Preferably, the liquid fatty alcohols are alcohols of structure R-OH as defined above with R denoting a branched saturated alkyl group. Preferably, R does not contain any hydroxyl groups. Mention may especially be made of oleyl alcohol, linoleyl alcohol, linolenyl alcohol, isocetyl alcohol, isostearyl alcohol, 2-octyl-l- dodecanol, 2-butyloctanol, 2-hexyl-l-decanol, 2-decyl-l-tetradecanol and 2- tetradecyl-l-cetanol, and mixtures thereof.

Preferentially, the liquid fatty alcohol is 2-octyl-l-dodecanol.

The solid esters of a fatty acid and/or of a fatty alcohol that may be used are preferably chosen from esters derived from a C9-C26 carboxylic fatty acid and/or from a C9-C26 fatty alcohol.

Preferably, these solid fatty esters are esters of a linear or branched, saturated carboxylic acid comprising at least 10 carbon atoms, preferably from 10 to 30 carbon atoms and more particularly from 12 to 24 carbon atoms, and of a linear or branched, saturated monoalcohol, comprising at least 10 carbon atoms, preferably from 10 to 30 carbon atoms and more particularly from 12 to 24 carbon atoms. The saturated carboxylic acids may be optionally hydroxylated, and are preferably monocarboxylic acids.

Esters of C4-C22 dicarboxylic or tricarboxylic acids and of C1-C22 alcohols and esters of mono-, di- or tricarboxylic acids and of di-, tri-, tetra- or pentahydroxy alcohols which are C2-C26 may also be used.

Mention may in particular be made of octyldodecyl behenate, isocetyl behenate, cetyl lactate, stearyl octanoate, octyl octanoate, cetyl octanoate, decyl oleate, hexyl stearate, octyl stearate, myristyl stearate, cetyl stearate, stearyl stearate, octyl pelargonate, cetyl myristate, myristyl myristate, stearyl myristate, diethyl sebacate, diisopropyl sebacate, diisopropyl adipate, di-n-propyl adipate, dioctyl adipate, dioctyl maleate, octyl palmitate, myristyl palmitate, cetyl palmitate, stearyl palmitate, and mixtures thereof. Preferably, the solid esters of a fatty acid and/or of a fatty alcohol are chosen from C9-C26 alkyl palmitates, in particular myristyl, cetyl or stearyl palmitate; C9-C26 alkyl myristates, such as cetyl myristate, stearyl myristate and myristyl myristate; and C9-C26 alkyl stearates, in particular myristyl stearate, cetyl stearate and stearyl stearate; and mixtures thereof.

For the purposes of the present invention, a wax is a lipophilic compound, which is solid at room temperature (25°C) and atmospheric pressure, with a reversible solid/liquid change of state, having a melting point greater than about 40°C, which may be up to 200°C, and having in the solid state an anisotropic crystal organization. In general, the size of the wax crystals is such that the crystals diffract and/or scatter light, giving the composition that comprises them a more or less opaque cloudy appearance. By bringing the wax to its melting point, it is possible to make it miscible with oils and to form a microscopically homogeneous mixture, but on returning the temperature of the mixture to room temperature, recrystallization of the wax, which is microscopically and macroscopically detectable (opalescence), is obtained.

In particular, the waxes that are suitable for use in the invention may be chosen from waxes of animal, plant or mineral origin, non-silicone synthetic waxes, and mixtures thereof.

Mention may be made especially of hydrocarbon-based waxes, for instance beeswax, especially of biological origin, lanolin wax and Chinese insect waxes; rice bran wax, carnauba wax, candelilla wax, ouricury wax, alfalfa wax, berry wax, shellac wax, Japan wax and sumach wax; montan wax, orange wax, lemon wax, microcrystalline waxes, paraffins and ozokerite; polyethylene waxes, the waxes obtained by Fischer-Tropsch synthesis and waxy copolymers, and also esters thereof.

Mention may thus be made of C₂ to C₆o microcrystalline waxes, such as Microwax HW.

Mention may also be made of the PM 500 polyethylene wax sold under the reference Permalen 50-L polyethylene.

Mention may also be made of waxes obtained by catalytic hydrogenation of animal or plant oils containing linear or branched Cs to C₃₂ fatty chains. Among these waxes mention may especially be made of isomerized jojoba oil such as the trans- isomerized partially hydrogenated jojoba oil, especially the product manufactured or sold by the company Desert Whale under the commercial reference Iso-Jojoba-50®, hydrogenated sunflower oil, hydrogenated castor oil, hydrogenated coconut oil, hydrogenated lanolin oil and bis(l,l,l-trimethylolpropane) tetrastearate, especially the product sold under the name Hest 2T-4S® by the company Heterene.

The waxes obtained by hydrogenation of castor oil esterified with cetyl alcohol, such as those sold under the names Phytowax Castor 16L64® and 22L73® by the company Sophim, may also be used.

A wax that may be also used is a C₂o to C₄o alkyl (hydroxystearyloxy)stearate (the alkyl group containing from 20 to 40 carbon atoms), alone or as a mixture. Such a wax is especially sold under the names Kester Wax K 82 P®, Hydroxypolyester K 82 P® and Kester Wax K 80 P® by the company Koster Keunen.

It is also possible to use microwaxes in the compositions of the invention; mention may be made especially of carnauba microwaxes, such as the product sold under the name MicroCare 350® by the company Micro Powders, synthetic-wax microwaxes, such as the product sold under the name MicroEase 114S® by the company Micro Powders, microwaxes consisting of a mixture of carnauba wax and polyethylene wax, such as the products sold under the names Micro Care 300® and 310® by the company Micro Powders, microwaxes consisting of a mixture of carnauba wax and of synthetic wax, such as the product sold under the name Micro Care 325® by the company Micro Powders, polyethylene microwaxes, such as the products sold under the names Micropoly 200®, 220®, 220L® and 250S® by the company Micro Powders, and polytetrafluoroethylene microwaxes, such as the products sold under the names Microslip 519® and 519 L® by the company Micro Powders.

The waxes are preferably chosen from mineral waxes, for instance paraffin, petroleum jelly, lignite or ozokerite wax; plant waxes, for instance cocoa butter or cork fibre or sugar cane waxes, olive tree wax, rice wax, hydrogenated jojoba wax, ouricury wax, carnauba wax, candelilla wax, alfalfa wax, or absolute waxes of flowers, such as essential wax of blackcurrant flower sold by the company Bertin (France); waxes of animal origin, for instance beeswaxes or modified beeswaxes (cerabellina), spermaceti, lanolin wax and lanolin derivatives; microcrystalline waxes; and mixtures thereof.

The ceramides, or ceramide analogues such as glycoceramides, that may be used in the compositions according to the invention, are known; mention may in particular be made of ceramides of classes I, II, III and V according to the Dawning classification.

The ceramides or analogues thereof that may be used preferably correspond to the following formula:

FLCHOH— CH— ChLOFL

in which:

- Ri denotes a linear or branched, saturated or unsaturated alkyl group, derived from C14-C30 fatty acids, it being possible for this group to be substituted with a hydroxyl group in the alpha-position, or a hydroxyl group in the omega- position esterified with a saturated or unsaturated C16-C30 fatty acid;

- R₂ denotes a hydrogen atom or a (glycosyl)n group, a (galactosyl)m group or a sulfogalactosyl group, in which n is an integer ranging from 1 to 4 and m is an integer ranging from 1 to 8;

- R₃ denotes a Ci5-C₂₆ hydrocarbon-based group, saturated or unsaturated in the alpha-position, it being possible for this group to be substituted with one or more C1-C14 alkyl groups;

it being understood that, in the case of natural ceramides or glycoceramides, R₃ may also denote a Ci5-C₂₆ alpha-hydroxyalkyl group, the hydroxyl group being optionally esterified with a C16-C30 alpha-hydroxy acid.

The ceramides more particularly preferred are the compounds for which Ri denotes a saturated or unsaturated alkyl derived from Ci₆-C₂₂ fatty acids; R₂ denotes a hydrogen atom and R₃ denotes a linear, saturated C15 group.

Preferentially, use is made of ceramides for which Ri denotes a saturated or unsaturated alkyl group derived from C14-C30 fatty acids; R₂ denotes a galactosyl or sulfogalactosyl group; and R₃ denotes a -CH=CH-(CH₂)i₂-CH₃ group.

Use may also be made of the compounds for which Ri denotes a saturated or unsaturated alkyl radical derived from Ci₂-C₂₂ fatty acids; R₂ denotes a galactosyl or sulfogalactosyl radical; and R₃ denotes a saturated or unsaturated C₁₂-C₂₂ hydrocarbon-based radical and preferably a -CH=CH-(CH₂)i₂-CH₃ group.

As compounds that are particularly preferred, mention may also be made of 2-N-linoleoylaminooctadecane- 1 ,3-diol; 2-N-oleoylaminooctadecane- 1 ,3-diol; 2-N- palmitoylaminooctadecane-l,3-diol; 2-N-stearoylaminooctadecane-l,3-diol; 2-N- behenoylaminooctadecane- 1 ,3-diol; 2-N-[2-hydroxypalmitoyl]aminooctadecane- 1 ,3- diol; 2-N-stearoylaminooctadecane-l,3,4 triol and in particular N- stearoylphytosphingosine; 2-N-palmitoylaminohexadecane- 1 ,3-diol, N- linoleoyldihydrosphingosine, N-oleoyldihydrosphingosine, N- palmitoyldihydrosphingosine, N-stearoyldihydrosphingosine, and N- behenoyldihydrosphingosine, N-docosanoyl-N-methyl-D-glucamine, cetylic acid N- (2-hydroxyethyl)-N-(3-cetyloxy-2-hydroxypropyl)amide and bis(N-hydroxyethyl-N- cetyl)malonamide; and mixtures thereof. N-Oleoyldihydrosphingosine will preferably be used.

Preferably, the non-silicone fatty substance(s) are chosen from fatty alcohols, which are preferably solid.

Preferably, phase (i) according to the invention comprises one or more solid non-silicone fatty substances.

More preferentially, phase (i) comprises one or more solid fatty alcohols. Particularly preferably, the solid fatty alcohol(s) that may be used in phase

(i) according to the invention are chosen from cetyl alcohol, stearyl alcohol, cetylstearyl alcohol, myristyl alcohol, and a mixture of these alcohols.

According to the invention, the above non-silicone fatty substance(s) are present in the first phase (phase (i)) of the composition according to the invention.

In one preferred mode of the invention, the second phase of the composition according to the invention also comprises one or more non-silicone fatty substances such as those described above, which are preferably solid. Even more preferentially, the second phase of the composition according to the invention also comprises one or more fatty alcohols, which are preferably solid.

The non-silicone fatty substance(s), whether they are in the first phase only or in the first phase and in the second phase of the composition according to the invention, generally represent from 0.1% to 25% by weight, preferably from 1% to 20% by weight and more preferentially from 5% to 15% by weight relative to the total weight of the composition.

The non- silicone fatty substance(s) generally represent from 0.05% to 25% by weight, preferably from 0.1% to 20% by weight and more preferentially from 1% to 15% by weight relative to the total weight of phase (i).

When they are also present in phase (ii), the non-silicone fatty substance(s) generally represent from 0.1% to 30% by weight, preferably from 1% to 25% by weight and more preferentially from 5% to 20% by weight relative to the total weight of phase (ii).

As described above, phase (i) of the composition according to the invention comprises one or more silicones.

The silicones that may be used in accordance with the invention may be in the form of oils, waxes, resins or gums.

Silicones that may especially be mentioned include polydialkylsiloxanes, especially polydimethylsiloxanes (PDMSs), and organomodified polysiloxanes comprising at least one functional group chosen from amino groups, aryl groups and alkoxy groups.

Silicones are defined in greater detail in Walter Noll's Chemistry and Technology of Silicones (1968), Academic Press. They may be volatile or non- volatile.

When they are volatile, the silicones are more particularly chosen from those with a boiling point of between 60°C and 260°C, and even more particularly from:

(i) cyclic polydialkylsiloxanes comprising from 3 to 7 and preferably from 4 to 5 silicon atoms. These are, for example, octamethylcyclotetrasiloxane sold especially under the name Volatile Silicone^® 7207 by Union Carbide or Silbione^® 70045 V2 by Rhodia, decamethylcyclopentasiloxane sold under the name Volatile Silicone^® 7158 by Union Carbide, and Silbione^® 70045 V5 by Rhodia, and mixtures thereof.

Mention may also be made of cyclocopolymers of the dimethylsiloxane/methylalkylsiloxane type, such as Volatile Silicone^® FZ 3109 sold by Union Carbide, having the formula: D" - D' D" - D'

With D" : —†i - O— with D' : - Si - O—

CH₃ C₈H₁₇

Mention may also be made of mixtures of cyclic polydialkylsiloxanes with organosilicon compounds, such as the mixture of octamethylcyclotetrasiloxane and tetra(trimethylsilyl)pentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-l,l '-bis(2,2,2',2',3,3'- hexatrimethylsilyloxy)neopentane;

(ii) linear volatile polydialkylsiloxanes containing 2 to 9 silicon atoms and having a viscosity of less than or equal to 5x10^"6 m²/s at 25°C. An example is decamethyltetrasiloxane sold in particular under the name SH 200 by the company Toray Silicone. Silicones belonging to this category are also described in the article published in Cosmetics and Toiletries, Vol. 91 , Jan. 76, pages 27-32 - Todd & Byers Volatile Silicone Fluids for Cosmetics.

Non-volatile polydialkylsiloxanes, polydialkylsiloxane gums and resins, polyorganosiloxanes modified with the above organofunctional groups, and mixtures thereof, are preferably used.

These silicones are more particularly chosen from polydialkylsiloxanes, among which mention may be made mainly of polydimethylsiloxanes bearing trimethylsilyl end groups. The viscosity of the silicones is measured at 25 °C according to ASTM Standard 445 Appendix C.

Among these polydialkylsiloxanes, mention may be made, in a non-limiting manner, of the following commercial products:

- the Silbione^® oils of the 47 and 70 047 series or the Mirasil^® oils sold by Rhodia, for instance the oil 70 047 V 500 000;

- the oils of the Mirasil^® series sold by the company Rhodia;

- the oils of the 200 series from the company Dow Corning, such as DC200 with a viscosity of 60 000 mm /s

- tthhee VViissccaassiill^®® ooiillss ffrroorm General Electric and certain oils of the SF series (SF 96, SF 18) from General Electric. Mention may also be made of polydimethylsiloxanes bearing dimethylsilanol end groups, known under the name dimethiconol (CTFA), such as the oils of the 48 series from the company Rhodia.

In this category of polydialkylsiloxanes, mention may also be made of the products sold under the names Abil Wax^® 9800 and 9801 by the company Goldschmidt, which are poly(Ci-C2o)dialkylsiloxanes.

The silicone gums that may be used in accordance with the invention are especially polydialkylsiloxanes and preferably polydimethylsiloxanes with high number-average molecular masses of between 200 000 and 1 000 000 g/mol, used alone or as a mixture in a solvent. This solvent may be chosen from volatile silicones, polydimethylsiloxane (PDMS) oils, polyphenylmethylsiloxane (PPMS) oils, isoparaffins, polyisobutylenes, methylene chloride, pentane, dodecane and tridecane, or mixtures thereof.

Products that may be used more particularly in accordance with the invention are mixtures such as:

- mixtures formed from a polydimethylsiloxane with a hydroxy-terminated chain, or dimethiconol (CTFA), and from a cyclic polydimethylsiloxane, also known as cyclomethicone (CTFA), such as the product Q2 1401 sold by the company Dow Corning;

- mixtures of a polydimethylsiloxane gum and a cyclic silicone, such as the product SF 1214 Silicone Fluid from the company General Electric; this product is an SF 30 gum corresponding to a dimethicone, having a number-average molecular weight of 500 000, dissolved in the oil SF 1202 Silicone Fluid corresponding to decamethylcyclopentasiloxane;

- mixtures of two PDMSs with different viscosities, and more particularly of a PDMS gum and a PDMS oil, such as the product SF 1236 from General Electric. The product SF 1236 is the mixture of a gum SE 30 defined above, with a viscosity of 20 m²/s and of an oil SF 96 with a viscosity of 5x 10^"6 m²/s. This product preferably includes 15% of gum SE 30 and 85% of an oil SF 96.

The organopolysiloxane resins that may be used in accordance with the invention are crosslinked siloxane systems containing the following units:

R₂Si0₂/2, R₃SiOi/₂, RSi0_3/2 and Si0_4/2, in which R represents an alkyl containing 1 to 16 carbon atoms. Among these products, the ones that are particularly preferred are those in which R denotes a C1 -C4 lower alkyl group, more particularly methyl.

Among these resins, mention may be made of the product sold under the name Dow Corning 593 or those sold under the names Silicone Fluid SS 4230 and SS 4267 by General Electric, which are silicones of dimethyl/trimethylsiloxane structure.

Mention may also be made of the trimethyl siloxysilicate-type resins sold especially under the names X22-4914, X21-5034 and X21-5037 by Shin-Etsu.

The organomodified silicones that may be used in accordance with the invention are silicones as defined above and comprising in their structure one or more organo functional groups attached via a hydrocarbon-based group.

The organomodified silicones may be polydiarylsiloxanes, especially polydiphenylsiloxanes, and polyalkylarylsiloxanes functionalized with the organofunctional groups mentioned previously.

The polyalkylarylsiloxanes are particularly chosen from linear and/or branched polydimethyl/methylphenylsiloxanes and polydimethyl/diphenylsiloxanes with a viscosity ranging from l x lO^"5 to 5x 10^"2 m²/s at 25°C.

Among these polyalkylarylsiloxanes, examples that may be mentioned include the products sold under the following names:

- the Silbione^® oils of the 70 641 series from Rhodia;

- the oils of the Rhodorsil^® 70 633 and 763 series from Rhodia;

- the oil Dow Corning 556 Cosmetic Grade Fluid from Dow Corning;

- the silicones of the PK series from Bayer, such as the product PK20;

- the silicones of the PN and PH series from Bayer, such as the products PN 1000 and PHI 000;

- certain oils of the SF series from General Electric, such as SF 1023, SF 1154, SF 1250 and SF 1265.

In a particularly preferred manner in the present invention, the silicone(s) are chosen from amino silicones.

The term "amino silicone" means any silicone comprising at least one primary, secondary or tertiary amine function or a quaternary ammonium group. Preferably, the amino silicone(s) that may be used in the cosmetic composition according to the present invention comprise in their structure at least four silicon atoms.

The amino silicones that may be used in the composition according to the present invention may be chosen from:

(a) the compounds corresponding to the following formula (V):

(R¹)_a(T)₃_a-Si[OSi(T)₂]_n-[OSi(T)_b(R¹)₂__b]_m-OSi(T)₃_a-(R¹)a (V) in which:

T is a hydrogen atom or a phenyl or hydroxyl (-OH), or Ci-Cs alkyl, and preferably methyl, or Ci-Cs alkoxy, preferably methoxy, group,

a denotes the number 0 or an integer from 1 to 3, and preferably 0, b denotes 0 or 1 , and in particular 1 ,

m and n are numbers such that the sum (n + m) can range especially from 1 to 2000 and in particular from 50 to 150, it being possible for n to denote a number from 0 to 1999 and in particular from 49 to 149, and for m to denote a number from 1 to 2000 and in particular from 1 to 10,

R¹ is a monovalent group of formula -C_qH_2qL in which q is a number from 2 to 8 and L is an optionally quatemized amine group chosen from the following groups:

-N(R²)-CH₂-CH₂-N(R²)₂,

-N(R²)₂,

-N⁺(R²)₃ Q ,

-N⁺(R²) (H)₂ Q ,

-N⁺(R²)₂HQ-,

-N(R²)-CH₂-CH₂-N⁺(R²)(H)₂ Q ,

in which R² may denote a hydrogen atom, a phenyl, benzyl or saturated monovalent hydrocarbon-based group, for example a Ci-C₂o alkyl group, and Q^" represents a halide ion, for instance fluoride, chloride, bromide or iodide.

In particular, the amino silicones corresponding to the definition of formula (V) are chosen from the compounds corresponding to the following formula (VI):

NH₀

(VI) in which R, R' and R", which may be identical or different, denote a C1-C4 alkyl group, preferably CH₃; a C1-C4 alkoxy group, preferably methoxy; or OH; A represents a linear or branched, C₃-Cs and preferably C₃-C₆, alkylene group; m and n are integers dependent on the molecular weight and the sum of which is between 1 and 2000.

According to a first possibility, R, R and R", which may be identical or different, each represent a C1-C4 alkyl or hydroxyl group, A represents a C₃ alkylene group and m and n are such that the weight-average molecular weight of the compound is between approximately 5000 and 500 000. The compounds of this type are named "amodimethicone" in the CTFA dictionary.

According to a second possibility, R, R and R", which may be identical or different, each represent a C1-C4 alkoxy or hydroxyl group, at least one of the groups R and R" is an alkoxy group and A represents a C₃ alkylene group. The hydroxy 1/alkoxy mole ratio is preferably between 0.2/1 and 0.4/1 and advantageously equal to 0.3/1. Moreover, m and n are such that the weight-average molecular weight of the compound is between 2000 and 10⁶. More particularly, n is between 0 and 999 and m is between 1 and 1000, the sum of n and m being between 1 and 1000.

In this category of compounds, mention may be made, inter alia, of the product Belsil® ADM 652 sold by the company Wacker.

According to a third possibility, R and R", which are different, each represent a C1-C4 alkoxy or hydroxyl group, at least one of the groups R and R" being an alkoxy group, R representing a methyl group and A representing a C₃ alkylene group. The hydroxy 1/alkoxy mole ratio is preferably between 1/0.8 and 1/1.1 and advantageously is equal to 1/0.95. Moreover, m and n are such that the weight- average molecular weight of the compound is between 2000 and 200 000. More particularly, n is between 0 and 999 and m is between 1 and 1000, the sum of n and m being between 1 and 1000.

More particularly, mention may be made of the product Fluid WR® 1300 sold by the company Wacker.

It should be noted that the molecular weight of these silicones is determined by gel permeation chromatography (room temperature, polystyrene standard, μ styragem columns, eluent THF, flow rate of 1 mm/m, 200 μΐ of a solution containing 0.5% by weight of silicone in THF are injected, and detection is performed by refractometry and UV-metry).

A product corresponding to the definition of formula (V) is in particular the polymer known in the CTFA dictionary as Trimethylsilyl Amodimethicone, corresponding to formula (VII) below:

(CH₃)₃

in which n and m have the meanings given above in accordance with formula (V).

Such compounds are described, for example, in patent EP 95238. A compound of formula (V) is sold, for example, under the name Q2-8220 by OSI.

(b) the compounds corresponding to formula (VIII) below:

(VIII) in which:

R³ represents a monovalent Ci-Cis hydrocarbon-based group, and in particular a Ci-Cis alkyl or C₂-Cis alkenyl group, for example methyl,

R⁴ represents a divalent hydrocarbon-based group, in particular a Ci-Cis alkylene group or a divalent Ci-Cis, for example Ci-Cs, alkyleneoxy group,

Q^" is a halide ion, in particular chloride,

r represents a mean statistical value from 2 to 20 and in particular from 2 to

8,

s represents a mean statistical value from 20 to 200 and in particular from

20 to 50.

Such compounds are described more particularly in patent US 4 185 087. A compound falling within this class is the product sold by the company Union Carbide under the name Ucar Silicone ALE 56.

(c) quaternary ammonium silicones, especially of formula (IX) :

in which:

R₇, which may be identical or different, represent a monovalent hydrocarbon-based group containing from 1 to 18 carbon atoms, and in particular a Ci-Cis alkyl group, a C₂-Cis alkenyl group or a ring comprising 5 or 6 carbon atoms, for example methyl, Re represents a divalent hydrocarbon-based group, in particular a Ci-Cis alkylene group or a divalent Ci-Cis, for example Ci-Cs, alkyleneoxy group linked to the Si via an Si-C bond,

R-8, which may be identical or different, each represent a hydrogen atom, a monovalent hydrocarbon-based group containing from 1 to 18 carbon atoms, and in particular a Ci-Cis alkyl group, a C₂-Cis alkenyl group or an -R6-NHCOR₇ group;

X^" is an anion, such as a halide ion, in particular chloride, or an organic acid salt (acetate, etc.),

r represents a mean statistical value from 2 to 200 and in particular from 5 to

100.

These silicones are described, for example, in patent application EP-A 0 530

974.

(d) the amino silicones of formula (X):

NH.

(X) in which:

- Ri, R₂, R3 and R4, which may be identical or different, each denote a C₁-C4 alkyl group or a phenyl group,

- R₅ denotes a C₁-C4 alkyl group or a hydroxyl group,

- n is an integer ranging from 1 to 5,

- m is an integer ranging from 1 to 5, and

- x is chosen such that the amine number is between 0.01 and 1 meq/g.

When these compounds are used, one particularly advantageous embodiment involves their combined use with cationic and/or nonionic surfactants.

By way of example, use may be made of the product sold under the name Cationic Emulsion DC939 by Dow Corning, which comprises, besides amodimethicone, a cationic surfactant, namely trimethylcetylammonium chloride, and a nonionic surfactant of formula Ci₃H₂₇-(OC₂H₄)i₂-OH, known under the CTFA name Trideceth-12.

Another commercial product that may be used according to the invention is the product sold under the name Dow Corning Q2 7224 by the company Dow Corning, comprising, in combination, the trimethylsilyl amodimethicone of formula (VII) described above, a nonionic surfactant of formula: C₈Hi₇-C₆H₄-(OCH₂CH₂)₄o- OH, known under the CTFA name Octoxynol-40, a second nonionic surfactant of formula: Ci₂H₂5-(OCH₂-CH₂)6-OH, known under the CTFA name Isolaureth-6, and propylene gly co 1.

Another commercial product that may be used according to the invention is the product sold under the name Wacker-Belsil ADM LOG 1, sold by Wacker, comprising, in microemulsion form, an amodimethicone of formula (VI) in combination with Trideceth-5 and Trideceth-10.

It is also possible to use the product sold under the trade name Xiameter

MEM 8299 emulsion by Dow Corning.

Other amino silicones may be used within the context of the invention, such as the product which is referenced in the CTFA dictionary under the name Polysilicone-9.

Preferably, the amino silicone(s) used in the cosmetic composition according to the invention are chosen from the amino silicones corresponding to formula (V), and even more particularly from the amino silicones of formulae (VI) or (VII).

Preferably, the composition according to the invention comprises an amino silicone, better still a non-phenyl silicone.

According to the invention, the above silicone(s) are present in the first phase (phase (i)) of the composition according to the invention.

The silicone(s) that may be used according to the present invention, whether they are in the first phase only or in the first phase and in the second phase of the composition according to the invention, generally represent from 0.01% to 10% by weight, preferably from 0.1% to 5% by weight and more preferentially from 0.3% to 2% by weight relative to the total weight of the composition. The silicone(s) that may be used according to the present invention generally represent from 0.01% to 10% by weight, preferably from 0.1 % to 5% by weight and better still from 0.5% to 3% by weight relative to the total weight of phase (i).

As described previously, phase (ii) of the composition according to the invention comprises one or more organosilanes other than the silicones as described previously.

The organosilane(s) that may be used according to the invention are preferably chosen from the compounds of formula (XI) and/or oligomers thereof and/or hydrolysis products thereof:

R_!Si(OR₂)_z(R₃)_x(OH)_y (XI) in which

- Ri is a cyclic or acyclic, linear or branched, saturated or unsaturated Ci to C₂₂ and especially C₂ to C₂o, hydrocarbon-based chain, which may be substituted with one or more groups chosen from amine groups NH₂ or NHR, R being a linear or branched Ci to C₂o and especially Ci to C₆, alkyl, a C₃ to C₄o cycloalkyl or a C₆ to C₃o aromatic radical; a hydroxyl group; a thiol group; an aryl group, more particularly benzyl, optionally substituted with one or more groups NH₂ or NHR; Ri possibly being interrupted with an oxygen, sulfur or nitrogen heteroatom or a carbonyl group;

- R₂ and R₃, which may be identical or different, represent a linear or branched alkyl group comprising from 1 to 6 carbon atoms,

- y denotes an integer ranging from 0 to 3,

- z denotes an integer ranging from 0 to 3, and

- x denotes an integer ranging from 0 to 2,

- with z + x + y = 3.

For the purposes of the present invention, the term "oligomer" means the polymerization products of the compounds of formula (XI) comprising from 2 to 10 silicon atoms.

Preferably, Ri is a linear or branched, more preferentially linear, saturated

Ci to C₂₂ and especially C₂ to C₁₂ hydrocarbon-based chain, which may be substituted with an amine group NH₂ or NHR, R being a Ci to C₂o and especially Ci to C₆, alkyl. Preferably, R₂ represents an alkyl group comprising from 1 to 4 carbon atoms, more preferentially a linear alkyl group comprising from 1 to 4 carbon atoms, and in particular an ethyl group.

Preferably, z ranges from 1 to 3.

Preferably, y is equal to 0.

Preferentially, z is equal to 3.

Even more preferentially, x and y are equal to 0 and z is equal to 3.

In one embodiment of the invention, the organosilane(s) are chosen from the compounds of formula (XI) in which Ri represents a linear alkyl group comprising from 1 to 18 carbon atoms and more particularly from 1 to 12 carbon atoms, or a Ci to C₆ and preferably C₂ to C₄ aminoalkyl group.

Particularly preferably, in this embodiment, Ri represents a methyl or octyl group.

In another embodiment of the invention, the organosilane(s) are chosen from the compounds of formula (XI) in which Ri is a linear or branched, saturated or unsaturated Ci to C₂₂ hydrocarbon-based chain, substituted with one or more amine groups NH₂ or NHR, R being a linear or branched Ci to C₂o, preferably Ci to C₆, alkyl, or a C₃ to C₄o cycloalkyl or a C₆ to C₃o aromatic.

Particularly preferably, in this other embodiment, Ri represents a Ci to C₆ and more preferentially C₂ to C₄ aminoalkyl group.

Preferably, the organosilane(s) that can be used according to the invention are chosen from methyltriethoxysilane, octyltriethoxysilane (OTES), dodecyltriethoxysilane, octadecyltriethoxysilane, hexadecyltriethoxysilane, 3- aminopropyltriethoxysilane (APTES), 2-aminoethyltriethoxysilane (AETES), 3- aminopropylmethyldiethoxysilane, N-(2-aminoethyl)-3-aminopropyltriethoxysilane, 3 -(m-aminophenoxy)propyltrimethoxysilane, p-aminophenyltrimethoxysilane, N-(2- aminoethylaminomethyl)phenethyltrimethoxysilane, oligomers thereof and mixtures thereof; and more particularly the organosilane(s) are chosen from methyltriethoxysilane, octyltriethoxysilane (OTES) and 3- aminopropyltriethoxysilane (APTES), oligomers thereof, hydrolysis products thereof, and mixtures thereof.

The organosilanes used in the composition of the invention, especially those comprising a basic function, may be partially or totally neutralized in order to improve the water solubility thereof. In particular, the neutralizer may be chosen from organic or mineral acids, such as citric acid, tartaric acid, lactic acid or hydrochloric acid.

Preferably, the optionally neutralized organosilane(s) that can be used according to the invention are water-soluble and especially soluble at a concentration of 2% by weight, better still at a concentration of 5% by weight and even better still at a concentration of 10% by weight in water at a temperature of 25°C and at atmospheric pressure (1 atm). The term "soluble" indicates the formation of a single macroscopic phase.

According to the invention, the above organosilane(s) are present in the second phase (phase (ii)) of the composition according to the invention.

However, they may also be present in the first phase (phase (i)) of the composition according to the invention.

In one preferred mode of the invention, the first phase of the composition according to the invention does not comprise any organosilane.

The organosilane(s) that may be used according to the invention, whether they are in the second phase only or in the first phase and in the second phase of the composition according to the invention, generally represent from 0.1% to 15% by weight, preferably from 1% to 10% by weight and more preferentially from 2% to 8% by weight relative to the total weight of the composition.

The organosilane(s) that may be used according to the invention generally represent from 0.1% to 15% by weight, preferably from 1% to 10% by weight and more preferentially from 2% to 8% by weight relative to the total weight of phase (ii).

As described previously, phase (ii) of the composition according to the invention comprises one or more cationic polymers.

For the purposes of the present invention, the term "cationic polymer" denotes any polymer containing cationic groups and/or groups that can be ionized to give cationic groups.

Preferably, the cationic polymer(s) that may be used according to the invention have a charge density of greater than or equal to 4 meq/g (milliequivalents per gram).

More preferably still, the cationic charge density is greater than or equal to 5 meq/g, and more preferably may vary from 5 to 20 meq/g. The cationic charge density of a polymer corresponds to the number of moles of cationic charges per unit mass of polymer under conditions in which it is totally ionized. It may be determined by calculation if the structure of the polymer is known, i.e. the structure of the monomers constituting the polymer and their molar proportion or weight proportion. It may also be determined experimentally by the Kjeldahl method.

The cationic polymers having a cationic charge density of greater than or equal to 4 meq/g that may be used in accordance with the present invention may be chosen from all those already known per se as improving the cosmetic properties of hair treated with detergent compositions, i.e. especially those described in patent application EP-A-0 337 354 and in French patent applications FR-A-2 270 846, 2 383 660, 2 598 611, 2 470 596 and 2 519 863.

The cationic polymers used in the present invention preferably have a number-average molecular weight of greater than or equal to 50 000 g/mol and more preferentially greater than or equal to 100 000 g/mol.

The cationic polymers used according to the present invention are advantageously chosen from those that contain units comprising primary, secondary, tertiary and/or quaternary amine groups which may either form part of the main polymer chain or may be borne by a side substituent directly connected thereto.

More particularly, the cationic polymers present in the composition according to the present invention are chosen from polymers such as polyamine, polyaminoamide and quaternary polyammonium, polyalkyleneimines and mixtures thereof.

The polymers of polyamine, polyamidoamide and poly quaternary ammonium type, that may be used in accordance with the present invention, and that may in particular be mentioned, are those described in French patents No. 2 505 348 or 2 542 997.

Among the cationic polymers that may be used according to the invention, mention may be made of:

(1) quaternized or non-quaternized vinylpyrrolidone/dialkylaminoalkyl

(meth)acrylate copolymers;

(2) polymers formed from piperazinyl units and divalent alkylene or hydroxy alky lene radicals containing straight or branched chains, optionally interrupted with oxygen, sulfur or nitrogen atoms or with aromatic or heterocyclic rings, and also the oxidation and/or quaternization products of these polymers. Such polymers are described, in particular, in French patents 2162025 and 2280361;

(3) water-soluble polyamino amides prepared in particular by polycondensation of an acidic compound with a polyamine; these polyaminoamides can be crosslinked with an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bisunsaturated derivative, a bis-halohydrin, a bisazetidinium, a bis- haloacyldiamine, a bis-alkyl halide or alternatively with an oligomer resulting from the reaction of a difunctional compound which is reactive with a bis-halohydrin, a bis-azetidinium, a bis-haloacyldiamine, a bis-alkyl halide, an epihalohydrin, a diepoxide or a bis-unsaturated derivative; the crosslinking agent being used in proportions ranging from 0.025 to 0.35 mol per amine group of the polyammoamide; these polyaminoamides can be alkylated or, if they include one or more tertiary amine functions, they can be quaternized. Such polymers are described, in particular, in French patents 2,252,840 and 2,368,508;

(4) polyammoamide derivatives resulting from the condensation of polyalkylene-polyamines with polycarboxylic acids, followed by alkylation with difunctional agents. Mention may be made, for example, of adipic acid/dialkylamino hydroxy alky ldialkylenetriamine polymers in which the alkyl group includes from 1 to 4 carbon atoms and preferably denotes methyl, ethyl or propyl. Such polymers are in particular described in French patent 1 583 363;

(5) the polymers obtained by reaction of a polyalkylene polyamine containing two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids containing from 3 to 8 carbon atoms. The mole ratio between the polyalkylene- polyamine and the dicarboxylic acid is between 0.8: 1 and 1.4: 1 ; the resulting polyammoamide is reacted with epichlorohydrin in a mole ratio of epichlorohydrin relative to the secondary amine group of the polyammoamide of between 0.5: 1 and 1.8:1. Such polymers are described in particular in US patents 3227615 and 2961347;

(6) alkyldiallylamine or dialkyldiallylammonium cyclopolymers, such as homopolymers or copolymers including units corresponding to the formulae (XII) or

(XIII):

in which:

- k and t are equal to 0 or 1 , the sum k + 1 being equal to 1 ;

- Rg denotes a hydrogen atom or a methyl group;

- R₇ and Rs, independently of each other, denote an alkyl group containing from 1 to 22 carbon atoms, a hydroxyalkyl group in which the alkyl group contains preferably 1 to 5 carbon atoms, a lower amidoalkyl group, or R₇ and Rs may denote, together with the nitrogen atom to which they are attached, heterocyclic groups such as piperidyl or morpholinyl; and

- Y^" is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate or phosphate.

Such polymers are especially described in French patent 2080759 and its certificate of addition 2190406.

Mention may be made, for example, of the diallyldimethylammonium chloride homopolymer sold under the name "MERQUAT^® 100" by the company NALCO (LUBRIZOL), and the diallyldimethylammonium chloride-acrylamide copolymers;

(7) the diquatemary ammonium polycondensates containing repeating units corresponding to formula (XIV):

in which:

-Rio, Ri i, Ri₂ and Rn, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic groups containing from 1 to 20 carbon atoms or lower hydroxyalkylaliphatic groups, or alternatively Rio, Rii, R₁₂ and Ri₃, together or separately, constitute, with the nitrogen atoms to which they are attached, heterocycles optionally containing a second heteroatom other than nitrogen, or alternatively Rio, Rii, R₁₂ and Ri₃ represent a linear or branched Ci to C₆ alkyl group substituted with a nitrile, ester, acyl or amide group or a group -CO-O-R-D or -CO- NH-R-D where R is an alkylene group and D is a quaternary ammonium group,

- Ai and Bi represent polymethylene groups containing from 2 to 20 carbon atoms, which may be linear or branched, saturated or unsaturated, and which may contain, linked to or inserted in the main chain, one or more aromatic rings, or one or more oxygen or sulfur atoms or sulfoxide, sulfone, disulfide, amino, alkylamino, hydroxyl, quaternary ammonium, ureido, amide or ester groups, and

- X^" denotes an anion derived from a mineral or organic acid;

Ai, Rio and R₁₂ can form, with the two nitrogen atoms to which they are attached, a piperazine ring; in addition, if Ai denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene group, Bi can also denote a -(CH₂)n-CO-D- OC-(CH₂)n- group, in which D denotes:

a) a glycol residue of formula: -O-Z-O-, where Z denotes a linear or branched hydrocarbon-based group or a group corresponding to one of the following formulae:

-(CH₂-CH₂-0)_x-CH₂-CH₂-

-[CH₂-CH(CH₃)-0]_y-CH₂-CH(CH₃)- where x and y denote an integer from 1 to 4, representing a defined and unique degree of polymerization or any number from 1 to 4 representing an average degree of polymerization;

b) a bis-secondary diamine residue, such as a piperazine derivative;

c) a bis-primary diamine residue of formula: -NH-Y-NH-, where Y denotes a linear or branched hydrocarbon-based group, or alternatively the divalent group

-CH₂-CH₂-S-S-CH₂-CH₂-;

d) a ureylene group of formula: -NH-CO-NH-.

Preferably, X^" is an anion, such as chloride or bromide.

These polymers have a number-average molecular mass generally between 1000 and 100 000 g/mol.

Polymers of this type are described in particular in French patents 2 320 330, 2 270 846, 2 316 271 , 2 336 434 and 2 413 907 and US patents 2 273 780, 2 375 853, 2 388 614, 2 454 547, 3 206 462, 2 261 002, 2 271 378, 3 874 870, 4 001 432, 3 929 990, 3 966 904, 4 005 193, 4 025 617, 4 025 627, 4 025 653, 4 026 945 and 4 027 020.

Use may be made more particularly of polymers that are formed from repeating units corresponding to formula (XV):

in which:

- Ri4, Ri5, Ri6 and Rn, which may be identical or different, each denote an alkyl or hydroxyalkyl group containing from 1 to 4 carbon atoms approximately,

- n and p are integers ranging from 2 to 20 approximately, and

- X^" is an anion derived from a mineral or organic acid.

A compound of formula (XV) that is particularly preferred is the one for which Ri4, Ri5, Ri₆ and Rn represent a methyl group and n = 3, p = 6 and X = CI, which is known as Hexadimethrine chloride according to the INCI (CTFA) nomenclature;

(8) polyquaternary ammonium polycondensates composed of units of formula (XVI):

R 20

N— (CH₂)— NH CO-(CH₂)_q— CO-NH— (CH₂)_S— N^~A—

^R19 ^R21 X (XVI)

in which:

- Ri8, Ri , R20 and R21 , which may be identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, β-hydroxyethyl, β-hydroxypropyl or -CH₂CH2(OCH₂CH2)pOH group, where p is equal to 0 or to an integer of between 1 and 6, with the proviso that Ri₈, R19, R₂o and R₂i do not simultaneously represent a hydrogen atom, - r and s, which may be identical or different, are integers between 1 and 6,

- q is equal to 0 or to an integer between 1 and 34,

- X denotes a halogen atom, and

- A denotes a dihalide group or preferably represents -CH₂-CH₂-O-CH₂-CH₂- Such compounds are especially described in patent application EP-A-122

324.

Among these, mention may be made, for example, of the Mirapol^® A 15, Mirapol^® AD1, Mirapol^® AZ1 and Mirapol^® 175 products sold by the company Miranol;

(9) homopolymers or copolymers derived from acrylic or methacrylic acids and comprising units (XVII), (XVIII) and/or (XIX):

(XIX) in which,

- R22 independently denotes H or CH₃,

- A2 independently denotes a linear or branched alkyl group of 1 to 6 carbon atoms or a hydroxyalkyl group of 1 to 4 carbon atoms,

- R-2₃, R24, R25, which may be identical or different, independently denote an alkyl group of 1 to 18 carbon atoms or a benzyl group,

- R26 and R27 represent a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, and

- X2^" denotes an anion, for example methosulfate or halide, such as chloride or bromide.

The comonomer(s) that can be used in preparing corresponding copolymers belong to the family of acrylamides, methacrylamides, diacetoneacrylamides, acrylamides and methacrylamides substituted on the nitrogen by lower alkyls, alkyl esters, acrylic or methacrylic acids, vinylpyrrolidone or vinyl esters;

(10) quaternary polymers of vinylpyrrolidone and of vinylimidazole;

(1 1) crosslinked polymers of methacryloyloxy(Ci-C₄)alkyltri(Ci- C₄)alkylammonium salts, such as the polymers obtained by homopolymerization of dimethylaminoethyl methacrylate quatemized with methyl chloride, or by copolymerization of acrylamide with dimethylaminoethyl methacrylate quatemized with methyl chloride, the homo- or copolymerization being followed by crosslinking with an olefmically unsaturated compound, in particular methylenebisacrylamide;

(12) mixtures thereof.

Other cationic polymers that may be used in the context of the invention are polyalkyleneimines, in particular polyethyleneimines, polymers containing vinylpyridine or vinylpyridinium units, condensates of polyamines and of epichlorohydrin, polyquaternary ureylenes and chitin derivatives.

Among all the cationic polymers that may be used in the context of the present invention, the ones preferably used are those chosen from families (6), (7), (9) and (1 1), as defined above, and more preferentially the cationic polymer(s) are chosen from:

- crosslinked polymers of methacryloyloxyalkyl(Ci-C₄) trialkyl(Ci- C₄)ammonium salts,

- alkyldiallylamine or dialkyldiallylammonium cyclopolymers,

- homopolymers or copolymers derived from acrylic or methacrylic acids and comprising units (XVII), as defined above, and mixtures thereof.

Better still, the cationic polymer(s) of the composition according to the invention are chosen from poly(2-methacryloyloxyethyltrimethylammonium) chloride (Polyquaternium-37), poly(dimethyldiallylammonium) chloride (Polyquaternium-6), and mixtures thereof.

According to the invention, the above cationic polymer(s) are present in the second phase (phase (ii)) of the composition according to the invention.

In one preferred mode of the invention, the first phase of the composition according to the invention does not comprise any cationic polymer. The cationic polymer(s), whether they are in the second phase only or in the first phase and in the second phase of the composition according to the invention, generally represent from 0.01% to 15% by weight, preferably from 0.05% to 10% by weight and more preferentially from 0.1% to 5% by weight relative to the total weight of the composition.

The cationic polymer(s) generally represent from 0.01% to 15% by weight, preferably from 0.05% to 10% by weight and more preferentially from 0.1% to 5% by weight relative to the total weight of phase (ii).

Each of the two phases of the composition according to the invention generally comprises a cosmetically acceptable medium.

For the purposes of the present invention, the term "cosmetically acceptable medium" means a medium that is compatible with the hair and the scalp.

Thus, one and/or the other of the phases may comprise water or a mixture of water and one or more cosmetically acceptable solvents chosen from C1 -C4 lower alcohols, such as ethanol, isopropanol, tert-butanol or n-butanol; polyols such as glycerol, propylene glycol and polyethylene glycols; and mixtures thereof.

The pH of each of the phases of the composition according to the invention generally ranges from 2 to 10, preferably from 2.5 to 7 and better still from 3 to 6.

The composition according to the invention, whether in one and/or the other of the phases, may also comprise one or more conventional additives that are well known in the art, such as anionic, nonionic and amphoteric or zwitterionic surfactants, natural or synthetic thickeners or viscosity regulators different from the cationic polymers described above; vitamins or provitamins; amphoteric or anionic polymers; pH stabilizers, preserving agents; dyes; fragrances.

A person skilled in the art will take care to select the optional additives and the amount thereof such that they do not harm the properties of the composition of the present invention.

These additives are generally present in the composition according to the invention in an amount ranging from 0 to 20% by weight relative to the total weight of the composition.

Preferably, the first phase (i) represents from 20% to 80% by weight and the second phase (ii) from 20%> to 80%> by weight, and preferably the first phase represents from 30%> to 50%> by weight and the second phase from 50%> to 70%> by weight, relative to the total weight of the composition. Advantageously, each of the phases (i) and (ii) of the composition according to the invention is an emulsion.

Preferably, the two phases (i) and (ii) have a viscosity of greater than or equal to 0.1 Pa.s, better still ranging from 0.1 Pa.s to 500 Pa.s, even better still from 0.5 Pa.s to 300 Pa.s and more preferably from 1 Pa.s to 200 Pa.s, at a temperature of 25°C and at a shear rate of 1 s^"1 (measurable, for example, with a Haake RS600 rheometer).

Each of the phases of the composition according to the invention may have a threshold stress at 25°C greater than or equal to 0.1 Pa.

Preferably, each of the two phases (i) and (ii) has a threshold stress at 25°C ranging from 0.1 Pa to 300 Pa, preferably from 1 Pa to 250 Pa and more preferably from 10 Pa to 200 Pa.

The threshold stress is determined by scanning under stress at 25°C. An imposed-stress Thermo Haake RS600 rheometer with sandblasted cone-plate geometry is used. The temperature is regulated by a Peltier-effect plate and an anti- evaporation device (solvent trap filled with water for the measurements at 25°C).

A logarithmic stress elevation from 0.5 to 500 Pa is performed over a period of 3 minutes. Two adjustment lines corresponding to the stationary regimes (solid and liquid behaviours) are plotted on the curve representing the strain as a function of the stress (logarithmic coordinates). The intersection of these two lines gives the value of the stress threshold.

To measure the stress threshold of each phase, the measurement is taken before mixing the two phases.

The present invention also relates to a process for preparing a composition as defined above, which comprises:

a) a step of preparing, separately from each other, phases (i) and (ii) by mixing the constituents of each phase, and then

b) a step of placing phases (i) and (ii) in contact without intimate mixing thereof.

Specifically, the conditioning properties and the persistence of the properties are maximal when the two phases are not mixed.

Preferably, in this process, the step of placing the various phases in contact is performed by means of one or more static mixers. Thus, to make the composition according to the invention, the ingredients of the first phase (phase (i)) are mixed separately from the ingredients of the second phase (phase (ii)). Each of the phases is prepared in a tank specifically dedicated thereto. Each phase is then introduced separately into a static mixer, i.e. a tube inside which is a three-dimensional structure promoting the appearance of turbulence during the passage of a fluid. The phases are mixed with a static device, i.e. a device that is not driven by a rotary system, thus avoiding dispersion of one of the phases in the other. The blades of the static mixing elements continuously divide the components into layers and stretch them out over the entire cross section of the pipe, which makes it possible to obtain a multi-phase composition according to the invention in which the phases are visually distinct.

According to a preferred embodiment, the visual appearance of the composition according to the invention is of "marbled" type. This "marbled" visual appearance may be modified as a function of the number of mixing elements used and the amount of first phase and of second phase.

The present invention also relates to a process for the cosmetic treatment of keratin fibres, in particular human keratin fibres such as the hair, which consists in applying said composition.

In this process, the composition according to the invention may be applied to wet or dry keratin fibres that have previously optionally been washed with shampoo.

Preferably, the composition according to the invention is applied to damp keratin fibres.

On conclusion of the treatment, the keratin fibres are optionally rinsed with water, optionally washed with a shampoo and then rinsed with water, before being dried or left to dry.

The composition according to the present invention is applied with a leave- on time that may range from 1 to 15 minutes, preferably from 2 to 10 minutes.

Finally, the present invention relates to the use of said composition for giving keratin fibres, in particular human keratin fibres such as the hair, cosmetic care that is persistent on shampooing.

The examples that follow serve to illustrate the invention without, however, being limiting in nature. Examples:

In the examples that follow, all the amounts are indicated as weight percentages of active material relative to the total weight of the composition.

Example 1

1) Preparation of a composition A according to the invention

A multiphase composition A according to the invention was prepared by placing in contact two phases Al (phase (i)) and A2 (phase (ii)) prepared separately by mixing the various constituents.

The ingredients and the contents of the two phases Al and A2 are indicated in the tables below.

Phase Al

Ingredients Contents

Cetyl alcohol 3.7

Cetearyl alcohol 0.7

Mixture of myristyl stearate and myristyl palmitate 0.8

Myristyl alcohol 0.4

Dipalmitoylethylhydroxyethylmethylammonium

0.3

methosulfate

Hydroxyethylcellulose 0.25

Cetyltrimethylammonium chloride 0.65 Polydimethylsiloxane bearing aminoethyl

aminopropyl groups, bearing methoxy and/or 1.5 hydroxyl and α-ω silanol functions

Trideceth-6 0.13

Isopropyl alcohol 0.1

Behenyltrimethylammonium chloride 0.47

Preserving agent, fragrance q.s.

Citric acid monohydrate 0.03

Hydrophobic dye 0.05

Deionized water qs 100

Phase A2

Ingredients Contents

Cetylstearyl alcohol 12.15

Mixture of myristyl stearate and myristyl palmitate 1

Mineral oil 3

Dipalmitoylethylhydroxyethylmethylammonium

1.35 methosulfate

Cetyltrimethylammonium chloride 0.8

3 - Aminopropy ltriethoxy silane 5

Lactic acid 1.8

Preserving agents q.s.

2-Phenoxyethano 1 0.2 Fragrance 0.4

Polydimethyldiallylammonium chloride 0.48

Deionized water qs 100

The multiphase composition A according to the invention is prepared by placing the two phases in contact in the weight proportions indicated in the table below and using a static mixer.

2) Results

A multiphase composition A of "marbled" appearance is obtained, which may be applied to hair that has been washed beforehand and that is still wet. The composition may be left on the hair for 2 to 5 minutes and then rinsed out with water.

The hair is then dried; it disentangles easily and is particularly smooth- feeling and supple.

Example 2

The composition according to the invention A of Example 1 was compared with a single-phase comparative composition B, comprising the same ingredients in the same proportions, but intimately mixed.

The compositions are applied to locks of moderately sensitized hair (alkaline solubility = 20, AS20) at a rate of 1 g of composition per lock (2.7 g). After a leave- on time of 5 minutes, the locks are rinsed and dried naturally.

The performance qualities in terms of transformation of the fibre on application of the compositions, disentangling, smoothness and suppleness on wet hair after rinsing the compositions and on wet hair after three shampoo washes were evaluated by touching and scored on a scale ranging from 0 (very poor) to 5 (very good) (in increments of 0.5).

ery goo

Results:

The term "transformation" means the action of the composition on the fibre immediately on contact. The more the fibre becomes supple (less rigid) and glidant (less coarse), the better the transformation.

It is thus found that the composition according to the invention makes it possible to obtain better properties than the homogeneous comparative composition.

Claims

1. Multiphase composition comprising:

(i) a first phase comprising one or more cationic surfactants, one or more non-silicone fatty substances and one or more silicones,

(ii) a second phase comprising one or more organosilanes other than silicones and one or more cationic polymers,

phases (i) and (ii) being visually distinct.

2. Composition according to Claim 1 , characterized in that the cationic surfactant(s) are quaternary ammonium salts, preferably chosen from:

- those corresponding to general formula (I) below:

(I) in which

R-8 to Ri i, which may be identical or different, represent a linear or branched aliphatic group comprising from 1 to 30 carbon atoms or an aromatic group, such as aryl or alkylaryl, at least one of the groups Rs to Rn comprising from 8 to 30 carbon atoms and preferably from 12 to 24 carbon atoms,

X^" is an anion chosen from the group of halides, phosphates, acetates, lactates, (Ci-C₄)alkylsulfates, (Ci-C₄)alkylsulfo nates and (Ci-C4)alkyl-arylsulfonates, - quaternary ammonium salts of imidazoline, for instance those of formula (II) below:

(II) in which Ri₂ represents an alkenyl or alkyl group comprising from 8 to 30 carbon atoms, for example derived from tallow fatty acids,

Ri₃ represents a hydrogen atom, a C₁-C4 alkyl group or an alkenyl or alkyl group comprising from 8 to 30 carbon atoms,

Ri4 represents a C₁-C₄ alkyl group,

Ri5 represents a hydrogen atom or a C₁-C₄ alkyl group,

X^" is an anion chosen from the group of halides, phosphates, acetates, lactates, (Ci-C₄)alkylsulfates, (Ci-C₄)alkylsulfo nates and (Ci-C₄)alkyl-arylsulfonates,

2+

R 16 N— (CH₂)₃— N— R21 2X ^~

R- R 20

(III) in which

Ri6a, Ri7a, Ri8a, Ri8, Ri9, R₂o and R₂₁, which may be identical or different, are chosen from hydrogen or an alkyl group comprising from 1 to 4 carbon atoms, and

X^" is an anion chosen from the group of halides, acetates, phosphates, nitrates, (Ci-C₄)alkyl sulfates, (Ci-C₄)alkyl- or (Ci-C₄)alkylarylsulfonates, in particular methyl sulfate and ethyl sulfate,

in which:

R22 is chosen from Ci-C₆ alkyl groups and Ci-C₆ hydroxyalkyl or dihydroxyalkyl groups,

R23 is chosen from:

O

- the group ^{R26 C} ,

- saturated or unsaturated, linear or branched C1-C22 hydrocarbon-based groups R27,

- a hydrogen atom,

R25 is chosen from:

o

- the group ^{R28 C} ,

- a hydrogen atom,

r, s and t, which may be identical or different, are integers ranging from 2 to

6,

y is an integer ranging from 1 to 10,

x and z, which may be identical or different, are integers ranging from 0 to

10,

X^" is a simple or complex, organic or inorganic anion,

with the proviso that the sum x + y + z is from 1 to 15, that when x is 0 then

R23 denotes R27, and that when z is 0 then R₂₅ denotes R29.

3. Composition according to Claim 1 or 2, characterized in that the cationic surfactant(s) are chosen from cetyltrimethylammonium, behenyltrimethylammonium and dipalmitoylethylhydroxyethyl-methylammonium salts, and mixtures thereof, and more particularly the cationic surfactant(s) are chosen from behenyl- trimethylammonium chloride, cetyltrimethylammonium chloride, and dipalmitoylethyl-hydroxyethylammonium methosulfate, and mixtures thereof.

4. Composition according to any one of the preceding claims, characterized in that the cationic surfactant(s) represent from 0.05% to 20% by weight, preferably from 0.1% to 10% by weight and more preferentially from 0.5% to 5% by weight relative to the total weight of the composition.

5. Composition according to any one of the preceding claims, characterized in that the non-silicone fatty substance(s) are chosen from fatty alcohols, preferably from solid fatty alcohols, better still chosen from cetyl alcohol, stearyl alcohol, cetylstearyl alcohol, myristyl alcohol, and a mixture of these alcohols.

6. Composition according to any one of the preceding claims, characterized in that the non-silicone fatty substance(s) represent from 0.1% to 25% by weight, preferably from 1% to 20% by weight and more preferentially from 5% to 15% by weight relative to the total weight of the composition.

7. Composition according to any one of the preceding claims, characterized in that the silicone(s) are chosen from amino silicones.

8. Composition according to any one of the preceding claims, characterized in that the silicone(s) represent from 0.01% to 10% by weight, preferably from 0.1% to 5% by weight and better still from 0.3% to 2% by weight relative to the total weight of the composition.

9. Composition according to any one of the preceding claims, characterized in that the organosilane(s) are chosen from the compounds of formula (XI) and/or oligomers thereof and/or hydrolysis products thereof:

R_!Si(OR₂)_z(R₃)_x(OH)_y (XI) in which

- Ri is a cyclic or acyclic, linear or branched, saturated or unsaturated Ci to

C₂₂ and especially C₂ to C₂o, hydrocarbon-based chain, which may be substituted with one or more groups chosen from amine groups NH₂ or NHR, R being a linear or branched Ci to C₂o and especially Ci to C₆, alkyl, a C₃ to C₄o cycloalkyl or a C₆ to C₃o aromatic radical; a hydroxyl group; a thiol group; an aryl group, more particularly benzyl, optionally substituted with one or more groups NH₂ or NHR; Ri possibly being interrupted with an oxygen, sulfur or nitrogen heteroatom or a carbonyl group;

- y denotes an integer ranging from 0 to 3,

- z denotes an integer ranging from 0 to 3, and

- x denotes an integer ranging from 0 to 2,

- with z + x + y = 3.

10. Composition according to Claim 9, characterized in that the organosilane(s) are chosen from compounds of formula (XI) in which Ri represents a linear alkyl group comprising from 1 to 18 carbon atoms and more particularly from 1 to 12 carbon atoms or a Ci to C₆ and preferably C₂ to C₄ aminoalkyl group, and more preferentially Ri represents a methyl or octyl group.

1 1. Composition according to Claim 9, characterized in that the organosilane(s) are chosen from the compounds of formula (XI) in which Ri is a linear or branched, saturated or unsaturated Ci to C₂₂ hydrocarbon-based chain, substituted with one or more amine groups NH₂ or NHR, R being a linear or branched Ci to C₂o and especially Ci to C₆ alkyl, or a C₃ to C₄o cycloalkyl or a C₆ to C₃o aromatic, and preferably Ri represents a Ci to C₆ and more preferentially C₂ to C₄ aminoalkyl group.

12. Composition according to any one of the preceding claims, characterized in that the organosilanes are chosen from methyltriethoxysilane, octyltriethoxysilane (OTES), dodecyltriethoxysilane, octadecyltriethoxysilane, hexadecyltriethoxysilane, 3-aminopropyltriethoxysilane (APTES), 2- aminoethyltriethoxysilane (AETES), 3-aminopropylmethyldiethoxysilane, N-(2- aminoethyl)-3-aminopropyltriethoxysilane, 3-(m- aminophenoxy)propyltrimethoxysilane, p-aminophenyltrimethoxysilane, N-(2- aminoethylaminomethyl)phenethyltrimethoxysilane, oligomers thereof and mixtures thereof; and preferably the organosilane(s) are chosen from methyltriethoxysilane, octyltriethoxysilane (OTES) and 3-aminopropyltriethoxysilane (APTES), oligomers thereof, hydrolysis products thereof, and mixtures thereof.

13. Composition according to any one of the preceding claims, characterized in that the organosilane(s) represent from 0.1% to 15% by weight, preferably from 1% to 10% by weight and more preferentially from 2% to 8% by weight, relative to the total weight of the composition.

14. Composition according to any one of the preceding claims, characterized in that the cationic polymer(s) have a charge density of greater than or equal to 4 meq/g, preferably greater than or equal to 5 meq/g, and more preferentially ranging from 5 to 20 meq/g.

15. Composition according to any one of the preceding claims, characterized in that the cationic polymer(s) are chosen from:

(1) quaternized or non-quaternized vinylpyrrolidone/dialkylaminoalkyl (meth)acrylate copolymers;

(2) polymers formed from piperazinyl units and divalent alkylene or hydroxyalkylene groups containing straight or branched chains, optionally interrupted with oxygen, sulfur or nitrogen atoms or with aromatic or heterocyclic rings, and also the oxidation and/or quaternization products of these polymers;

(3) water-soluble polyamino amides prepared in particular by polycondensation of an acidic compound with a polyamine;

(4) the polyamino amide derivatives resulting from the condensation of polyalkylene-polyamines with polycarboxylic acids, followed by alkylation with difunctional agents;

(5) polymers obtained by reaction of a polyalkylene-polyamine containing two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and the saturated aliphatic dicarboxylic acids containing from 3 to 8 carbon atoms;

(6) alkyldiallylamine or dialkyldiallylammonium cyclopolymers, such as homopolymers or copolymers including units corresponding to the formulae (XII) or (XIII):

in which: - k and t are equal to 0 or 1 , the sum k + 1 being equal to 1 ;

- R9 denotes a hydrogen atom or a methyl group;

- R₇ and R-8, independently of each other, denote an alkyl group containing from 1 to 22 carbon atoms, a hydroxyalkyl group in which the alkyl group contains preferably 1 to 5 carbon atoms, a lower amidoalkyl group, or R₇ and Rs may denote, together with the nitrogen atom to which they are attached, heterocyclic groups such as piperidyl or morpholinyl; and

- Y^" is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate, phosphate;

(7) diquaternary ammonium poly condensates containing repeating units corresponding to formula (XIV):

in which:

-Rio, R11, R12 and R13, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic groups containing from 1 to 20 carbon atoms or lower hydroxyalkylaliphatic groups, or alternatively Rio, R11 , R12 and R13, together or separately, constitute, with the nitrogen atoms to which they are attached, heterocycles optionally containing a second heteroatom other than nitrogen, or alternatively Rio, R11, R12 and R13 represent a linear or branched Ci to C₆ alkyl group substituted with a nitrile, ester, acyl or amide group or a group -CO-O-R-D or -CO- NH-R-D where R is an alkylene group and D is a quaternary ammonium group,

- X^" denotes an anion derived from a mineral or organic acid; (8) polyquaternary ammonium polycondensates composed of units of formula (XVI):

— N— (CH₂)_r— NH CO-(CH₂)_q— CO-NH— (CH₂)_S— N^~A—

^{X R}19 ^R21 X (XVI) in which:

- Ri8, Ri , R₂₀ and R21 , which may be identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, β-hydroxyethyl, β-hydroxypropyl or - CH₂CH₂(OCH₂CH₂)_pOH group, where p is equal to 0 or to an integer of between 1 and 6, with the proviso that Ri₈, R19, R₂o and R₂i do not simultaneously represent a hydrogen atom,

- r and s, which may be identical or different, are integers between 1 and 6,

- q is equal to 0 or to an integer between 1 and 34,

- X denotes a halogen atom, and

- A denotes a dihalide group or represents preferably

-CH₂-CH₂-0-CH₂-CH₂-;

R, R,

CH₂- C CH

CH₂-C

0 = = C o=c

0 = o NH

O

^2 ^2 ^2

A₂

R₂₅- N+- R₂₄ R₂5 ^{N +} - ^R24

^R26 ^R27 (XVII), ^R23 (XVIII) and/or ^R23 (XIX) in which:

- R₂₂ independently denotes H or CH₃,

- A₂ independently denotes a linear or branched alkyl group of 1 to 6 carbon atoms or a hydroxyalkyl group of 1 to 4 carbon atoms,

- R₂₃, R R which may be identical or different, independently denote an alkyl group of 1 to 18 carbon atoms or a benzyl group, - R-26 and R27 represent a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, and

- X₂- denotes an anion, for example methosulfate or halide, such as chloride or bromide;

(10) quaternary polymers of vinylpyrrolidone and of vinylimidazole;

(1 1) crosslinked polymers of methacryloyloxy(Ci-C4)alkyltri(Ci- C₄)alkyl ammonium salts; and

(12) mixtures thereof.

16. Composition according to any one of the preceding claims, characterized in that the cationic polymer(s) are chosen from families (6), (7), (9) and

(1 1), as defined according to Claim 15, and preferably the cationic polymer(s) are chosen from:

crosslinked polymers of methacryloyloxyalkyl(Ci-C₄)trialkyl(Ci- C₄)ammonium salts,

- alkyldiallylamine or dialkyldiallylammonium cyclopolymers,

homopolymers or copolymers derived from acrylic or methacrylic acids and comprising units (XVII), as defined according to Claim 15, and mixtures thereof.

17. Composition according to any one of the preceding claims, characterized in that the cationic polymer(s) are chosen from poly(2- methacryloyloxyethyltrimethylammonium) chloride, poly(dimethyldiallylammonium) chloride, and mixtures thereof.

18. Composition according to any one of the preceding claims, characterized in that the cationic polymer(s) represent from 0.01% to 15% by weight, preferably from 0.05% to 10% by weight and more preferentially from 0.1% to 5% by weight relative to the total weight of the composition.

19. Composition according to any one of the preceding claims, characterized in that the first phase represents from 20% to 80% by weight and the second phase from 20%> to 80%> by weight, and preferably the first phase represents from 30%) to 50%) by weight and the second phase from 50%> to 70%> by weight, relative to the total weight of the composition.

20. Process for preparing a composition according to any one of the preceding claims, comprising:

a) a step of preparing, separately from each other, phases (i) and (ii) by mixing the constituents of each phase, and then b) a step of placing phases (i) and (ii) in contact without intimate mixing thereof.

21. Process according to Claim 20, characterized in that the step of placing in contact is performed by means of one or more static mixers.

22. Process for the cosmetic treatment of keratin fibres, in particular human keratin fibres such as the hair, which consists in applying to said keratin fibres a composition as defined according to any one of Claims 1 to 19.

23. Use of a composition as defined according to any one of Claims 1 to 19, for giving keratin fibres, in particular human keratin fibres such as the hair, cosmetic care that is persistent on shampooing.