FR2827191A1 - AQUEOUS COMPOSITION COMPRISING DIRECT EMULSION OF SILICONE OIL FREE OF HYDROPHILIC CLUSTER AND OIL COMPRISING AT LEAST ONE HYDROPHILIC GROUP AND USE OF THE EMULSION - Google Patents

Abstract

The invention relates to an aqueous composition for rinsing, of a direct oil-in-water emulsion comprising: a polyorganosiloxane oil (1) with no hydrophilic groups with a dynamic viscosity of at least 5 Pa.s; an oil (2) which is immiscible with water and miscible or dispersible in the oil (1), optionally by means of an auxiliary compound (3), selected from: (i) at least one polyorganosiloxane oil with at least one hydrophilic group and/or (ii) at least one vegetable or animal oil or the derivatives thereof; at least one surfactant and/or an ionic or non-ionic ampiphilic co-polymer; the dynamic viscosity of the mixture of oil (1), oil (2) and optionally the auxiliary compound (3) is at least 5 Pa.s; said emulsion is prepared prior to introduction thereof into the composition, by emulsifying a mixture of oil (1), oil (2) and optionally the auxiliary compound (3). According to the invention, the above emulsion is used in cosmetic formulations for the treatment of keratin surfaces and in formulations for the treatment of textiles and in detergent formulations.

Description

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AQUEOUS COMPOSITION COMPRISING A DIRECT EMULSION OF A
SILICONE OIL FREE OF HYDROPHILIC GROUPING AND
OIL COMPRISING AT LEAST ONE HYDROPHILIC GROUP AND
USE OF EMULSION
The present invention relates to an aqueous composition intended to be rinsed, comprising a direct emulsion comprising a polyorganosiloxane oil free of hydrophilic group and an oil comprising at least one hydrophilic group; the emulsion being prepared prior to its introduction into said composition by emulsification of the mixture of the two oils. It also relates to the use of such an emulsion in the fields of cosmetics, detergency, textile processing.

 As mentioned above, the invention relates to the field of formulations intended to be rinsed, and more particularly to the field of aqueous cosmetic formulations for the treatment of keratinous surfaces.

 For the purposes of the invention, the term "cosmetic formulation" is intended to mean all cosmetic products or preparations of the type described in Annex 1 ("Illustrative list of the category of cosmetic products") of the European directive. No 76/7681 EEC of 25 July 1976, known as the Cosmetics Directive.

 One of the objectives sought by the cosmetic compositions is to deposit on the skin and / or the hair one or more substances that have the effect of modifying the characteristics of the treated surface. For example, these substances may be emollients, moisturizers, agents giving volume, gloss, a silky touch, antistatic properties, increased combability in the case of hair, etc.

 Thus, certain aqueous cosmetic formulations comprise a hydrophilic group-free oil (generally of the polydimethylsiloxane type) used for the purpose of modifying the properties of the surface on which it is deposited.

 The difficulty encountered is that this type of oil does not always have sufficient affinity vis-à-vis the surface to be treated and which is often generally anionic.

 This is why functionalized oils have been developed whose affinity for these surfaces is improved. These oils are for example silicones carrying amine functions.

 This time, there are cost problems because such oils are more expensive than the previous ones. Thus, some formulations include a mixture

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 of oils, obtained by adding each of the oils in the formulation during the preparation of the latter. More specifically, the formulation comprises a mixture of an emulsion of the first oil and an emulsion of the second.

 The present invention is an improvement of these formulations.

 It therefore has for its first object an aqueous composition intended to be rinsed, comprising a direct oil-in-water emulsion comprising: an oil (1) consisting of at least one polyorganosiloxane oil free from a hydrophilic group and whose dynamic viscosity is at least 5 Pa. S; an oil (2) immiscible with water and miscible or dispersible in the oil (1) possibly by means of an additional compound (3) chosen from: (i) at least one oil and / or one resin and / or a polyorganosiloxane gum having at least one hydrophilic group, and / or (ii) at least one vegetable or animal oil, or derivatives thereof; at least one nonionic, ionic surfactant, at least one nonionic, ionic amphiphilic copolymer, alone or in combination; the dynamic viscosity of the mixture of the oil (1), the oil (2) and, if appropriate, the additional compound (3) being at least 5 Pa.s; said emulsion being prepared prior to its introduction into the composition, by emulsification of a mixture of the oil (1), the oil (2) and, if appropriate, the additional compound (3).

 A second object of the invention is the use of the emulsion mentioned above, in aqueous cosmetic compositions intended to be rinsed, for the treatment of keratinous surfaces.

 A third object of the invention is the use of the emulsion mentioned above, in compositions intended to be rinsed for the treatment of textile fibers.

 A fourth subject of the invention relates to the use of the emulsion mentioned above, in detergent compositions intended to be rinsed.

 It has indeed been remarked, totally unexpectedly, that the efficiency of the deposition of the high-viscosity silicone oil was considerably improved when the latter was in the form of a co-emulsion with an oil comprising at least one group hydrophilic, rather than in the form of an emulsion mixed with an oil emulsion comprising at least one hydrophilic group.

 Moreover, it has been observed that the deposition of the oil on rather hydrophilic surfaces was increased under certain conditions. In other words, the use of the co-emulsions of an oil comprising at least one hydrophilic group and a hydrophilic group-free oil makes it possible to promote the deposition of the hydrophilic group-free oil on these particular surfaces.

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 Finally, another advantage of the invention lies in the fact that the co-emulsion has an improved resistance to rinsing compared to formulations comprising a mixture of emulsions of an oil comprising at least one hydrophilic group on the one hand and an oil free of hydrophilic group on the other hand.

 But other features and advantages of the present invention will appear more clearly on reading the description and the example which follows.

 First of all, it is specified that the values of the viscosities are the values of the dynamic viscosities measured at 25 C using a BROOKFIELD viscometer according to the indications of the AFNOR NFT 76102 standard, unless other information are given.

 The term miscible means that the solubility of a compound in a given medium is at least 90% by weight, when the amount of this compound in the medium is 10% by weight; the measurements being made at 25 C.

 The term "dispersible" means that in all or part of the indicated range of concentration of a compound in a given medium, no macroscopic phase separation is observed after one hour at 25 ° C without stirring.

 Finally, in what follows, the terms polyoragnosiloxane oil or silicone oil, will denote indifferently an oil and / or a resin and / or a polyorganosiloxane gum, unless otherwise indicated.

 The emulsion entering the cosmetic composition is therefore a direct oil-in-water emulsion.

 More particularly, the oil phase of the emulsion comprises a mixture of oils, the oil (1), the oil (2) and optionally the additional compound (3), which will be described in more detail in what follows .

 It is further indicated that multiple emulsions of the oil / oil / water type are not within the scope of the invention.

 As mentioned above, the oil phase of this emulsion comprises at least one oil (1) consisting of at least one polyorganosiloxane oil free of hydrophilic group whose dynamic viscosity is at least 5 Pa. S.

 The oil (1) can consist of a mixture of several oils, as soon as the dynamic viscosity of the mixture is at least 5 Pa. S. Preferably, the dynamic viscosity of the oil (1), which comprises one or more species, is such that it is at least 30 Pa, preferably at least 100 Pa.

 According to one particular embodiment of the invention, the oil (1) is chosen from polyorganosiloxane oils consisting in whole or in part of units of formulas: R'3-aRaSiO1 / 2 (M-unit) and / or R2SiO ( pattern D) formulas where:

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 - a is an integer of 0 to 3; the radicals R are identical or different and represent: a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to 15 carbon atoms, optionally carrying one or more halogen atoms, or aromatic containing from 6 to 13 carbon atoms ; * a hydrogen atom; the radicals R 'are identical or different and represent an alkoxy or alkenyloxy group containing from 1 to 10 carbon atoms; an aryloxy group containing from 6 to 13 carbon atoms.

 Preferably, the radicals R are chosen from C1-C1 alkyl radicals. optionally halogenated, such as methyl, ethyl, octyl, trifluoropropyl; alkenyl, preferably C 2 -C 10 alkenyl, such as vinyl, allyl, hexenyl, decenyl, decadienyl; aryls, preferably C6-C13, such as phenyl.

 Preferably at least 80% of the radicals R of said oils represent a methyl group.

 Preferably, the radicals R 'may be chosen from C1-C10 alkoxy radicals, preferably C1-C8 alkoxy radicals, such as methoxy, ethoxy, propoxy, butoxy or octyloxy radicals; C2-C10 alkenyloxy, preferably C8-C8 alkenyloxy; C 1 -C 13 aryloxy, such as phenyloxy.

 As concrete examples of "D units", mention may be made of: (CH 3) 2 SiO; CH3 (CH = CH2) SiO; CH3 (C6HSiO; (C6H5) 2SiO; CH3HSiO; CH3 (CH2-CH2-CH2OH) SiO.

(CH (CH=CH,) SiO ; (CHHSiO ; (OCHsSiO,. As concrete examples of "M units", there may be mentioned: (CgSiO;

(CH (CH = CH,) SiO; (CHHSiO; (OCHsSiO ,.

 Furthermore, the silicone oil used as oil (1) may optionally comprise, preferably less than 5% of the following units of formula T or Q: RSiOg (T unit) and / or Sitz (Q unit) formula in which R has the definition given above.

 As concrete examples of "T units", there may be mentioned: CHgSiOg; (CH = CH 2) Sitz; HSiO.

 It is also noted that when the silicone oils contain reactive R radicals (such as H, vinyl, allyl, hexenyl, ....), the latter generally do not represent more than 5% of the weight and preferably not more 1% of the weight of the silicone oil.

 Among the silicone oils which are preferably used as hydrophilic group-free oil (1), there may be mentioned silicone oils of the polydimethylsiloxane (dimethicone), diphenyidimethicone and phenyltrimethicone type.

 It should be noted that the oil (1) can be associated with a solvent. Among the solvents which can be envisaged for these oils, mention may be made of volatile cyclic organopolysiloxanes (octamethylcyclo and trasiloxane, decamethylcyclo pentasiloxane, etc.), oils

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1 polydiméthylsiloxanes courtes (viscosité inférieure à 100 mPa. s.), l'hexaméthyldisiloxane, les cétones (méthyléthylcétone...) les éthers (éther diéthylique...), les esters (myristate d'isopropyle, acétate d'éthyle,), certains solvants chlorés ou chlorofluorés (chlorure de méthylène, chloroforme...), les paraffines très ramifiées (huiles blanches à base d'isoalcanes et de cycloalcanes......).

1 short polydimethylsiloxanes (viscosity less than 100 mPa.s), hexamethyldisiloxane, ketones (methyl ethyl ketone, etc.), ethers (diethyl ether, etc.), esters (isopropyl myristate, ethyl acetate) , certain chlorinated or chlorofluorinated solvents (methylene chloride, chloroform ...), very branched paraffins (white oils based on isoalkanes and cycloalkanes ......).

 According to the present invention, may further be present in the silicone phase silanes.

 These silanes may be in particular by-products of synthesis of said polyorganosiloxane oils used.

Si (OC2H5) 4 ; CH3Si (OCH3) 3 ; CHsSiHs ; (CsHsCSOCHs) ; CH2=CHSi (OCH3) 3 ; CH3 (CH2=CH) Si (OCH3) 2 ; CH2=CHSi (OC2H5h ; CH3Si [ON=C (CH3) 2] 3 ; CH2=CHSi [ON=C (CH3) C2H5] 3 ; CH3Si[O-C (CH3) =CH2] 3 ; méthyltris (N-méthylacétamido silane) ; méthyltris (cyclohéxylamino silane) ;
S'ils sont présents, leur teneur est généralement de l'ordre de 0 exclu à 10 parties en poids, de préférence de l'ordre de 0 exclu à 5 parties en poids pour 100 parties en poids d'huile (s) polyorganosiloxanes, lorsqu'il s'agit de sous-produits réactionnels. By way of examples, mention may be made of the following silanes:

If (OC2H5) 4; CH3Si (OCH3) 3; CHsSiHs; (CsHsCSOCHs); CH2 = CHSi (OCH3) 3; CH3 (CH2 = CH) Si (OCH3) 2; CH2 = CHSi (OC2H5h; CH3Si [ON = C (CH3) 2] 3; CH2 = CHSi [ON = C (CH3) C2H5] 3; CH3Si [OC (CH3) = CH2] 3; methyltris (N-methylacetamido silane) methyltris (cyclohexylamino silane);
If they are present, their content is generally of the order of 0 excluded to 10 parts by weight, preferably of the order of 0 excluded to 5 parts by weight per 100 parts by weight of oil (s) polyorganosiloxanes, when it comes to reaction by-products.

 In addition, the oil (1) may also comprise siliceous or non-siliceous fillers, reinforcing or semi-reinforcing. By way of example, mention may be made of colloidal silicas, silica powders for combustion and precipitation, diatomaceous earths, ground quartz, natural calcium carbonate, hydrated alumina, magnesium hydroxide carbon black, titanium dioxide, aluminum oxide, vermiculite, zinc oxide, mica, talc, iron oxide, barium sulfate, slaked lime ...; the particle size of these fillers is generally of the order of 0.001 to 30 μm.

 They are generally present in amounts of up to 300%, preferably of the order of 3 to 100% of the weight of oil (1).

 The emulsion further comprises at least one oil (2).

 This oil is chosen from compounds immiscible with water. In addition, the oil (2) is chosen from miscible or dispersible compounds in oil (1) or rendered such by the presence of an additional compound (3) which will be described below.

 It should be noted that the oil (2) can not be considered as a surfactant.

In addition, the oil (2) is chosen from compounds having at least one hydrophilic group chosen from hydroxyl, ether, amine, amide, ester, carboxylic, phosphoric, phosphonic, sulfuric, sulphonic or sulphosuccinic functions, or the corresponding salts.
According to a first variant, the oil (2) is chosen from (i) oils and / or resins and / or polyorganosiloxane gums having at least one group

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 hydrophilic as mentioned above. Preferably, the oil (2) is chosen from oils and / or resins.

More particularly, the oil (2) (i) is chosen from oils and / or polyorganosiloxane resins consisting in whole or in part of units of formulas: R's-aRaSiO1 / 2 (unit M) and R2SiO (Motif D) formulas where: - a is an integer from 0 to 3 - the radicals R, identical or different, represent: a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to 15 carbon atoms, preferably from 1 to 10 carbon atoms; an aromatic hydrocarbon group containing from 6 to 13 carbon atoms; a hydrophilic organic group bonded to silicon by an Si-C bond or
Si-OC; a hydrogen atom: the radicals R ', which may be identical or different, represent an OH group or an alkoxy or alkenyloxy group containing from 1 to 10 carbon atoms; an aryloxy group containing from 6 to 13 carbon atoms; an amino-or amido-functional group containing from 1 to 6 carbon atoms bonded to silicon by an Si-N bond.

 What has been detailed before with regard to the nature of the oil (1) remains valid and will not be repeated here.

 As regards more particularly the radicals R corresponding to a hydrophilic organic group bonded to silicon by an Si-C or Si-OC bond, mention may be made of: hydroxyfunctional groups such as alkyl groups substituted by one or more hydroxyl groups or di (hydroxyalkyl) amino and optionally interrupted by one or more hydroxyalkylamino bivalent groups. By alkyl is meant a hydrocarbon chain preferably Cl-Cl o.

Examples of these groups include: - (CH 2) 3-OH; - (CH 2) 4 N (CH 2 CH 2 OH) 2; - (CH 2) 3 N (CH 2 CH 2 OH) -CH 2 CH 2 -; N (CH 2 CH 2 OH) 2; - (CH 2) 3 -O-CH 2 -CH (OH) -CH 2 -N (CH 2 -CH 2 -NH 2); - (CH 2) 3 -O-CH 2 -CH (-N (-CH 2 -CH 2 -NH 2)) - CH2 (OH); -CH (CH3) -CH2-O-CH2-CH (OH) -CH2-N (-CH2-CH2-NH2); -CH (CH3) -CH2-O-CH2-CH (-N (-CH2-CH2-NH2)) - CH2 (OH).

aminofunctional compounds such as alkyl substituted with one or more amino or aminoalkylamino groups in which alkyl is as defined above, the amino group being

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 primary, secondary, tertiary or ammonium (quaternary), as well as by 1,1,6,6-tetrasubstituted piperidine derivatives.

Examples of aminofunctional groups are (CH 2) 3 -NH 2; (CH2) 3NH (CH2) 2NH2,
As regards the tetrasubstituted piperidine derivatives, the latter are more particularly substituted at the 1,1,6,6 positions (ie the two ring carbon atoms adjacent to the nitrogen atom) with a C 1 -C 8 alkyl group. the ring nitrogen atom is substituted by hydrogen, oxygen, C 1 -C 8 alkyl, hydroxyl, C 2 -C 4 hydroxyalkyl, alkylcarbonyl, phenyl, benzyl and radical; C 1 -C 6 alkoxy) linear or cyclic. In addition, the piperidine group is advantageously bonded to a silicon atom via the carbon in position 3, to a radical of formula-ZR-; wherein Z is - (CH2) pO-, - (CH2) p-NR1- where R1 is a hydrogen atom or an alkyl radical having 1 to 12 carbon atoms; and wherein R is -R2-, -R2CO-, -R3-0-R3, -R3COOR3-, -R30R3-OCOR3-, wherein R2 is a linear or non-linear alkyl radical having 2 to 20 carbon atoms, R3 identical or different, represent a linear or branched alkyl radical comprising 1 to 12 carbon atoms and optionally carrying a hydroxyl group, and p is between 0 and 10 included terminals. Such silicones bearing hindered amine functions are well known (HALS) and are described in particular in EP 388321 or EP 665258.

 * amidofunctional such as alkyl substituted with one or more acylamino groups and optionally interrupted by one or more bivalent alkyl-CO-N <groups where alkyl is as defined above and acyl represents alkylcarbonyl.

 An example is the group - (CH2) 3-N (COCH3) - (CH2) 2NH (COCH3).

carboxyfunctionals such as carboxyalkyl optionally interrupted by one or more oxygen or sulfur atoms wherein alkyl is as defined above. ;
An example is the group -CH2-CH2-S-CH2-COOH.

 With regard more particularly to the hydroxyl radical R indicated in the formulas of units M and D of the oil (2), said radicals can be present initially in the molecule or be the result of a hydrolysis of acyloxy groups containing 2 to 13 carbon atoms or cetiminoxy containing from 3 to 8 carbon atoms.

More particularly, the acyloxy group is preferably a (C1-C12) alkylcarbonyl group such as acetoxy; the cetiminoxy group corresponds in particular to ON = C (CH3) C2H5.

As concrete examples of "M units" include: [O-C (CH 3) = CH 2] 3 SiO 1/2; [ON = C (CH3) hSi01 / 2

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According to a first advantageous variant of the invention, the oil (2) (i) is chosen from oils and / or gums and / or polyorganosiloxane resins comprising at least one hydroxyl radical as a hydrophilic group.

 According to another advantageous variant of the invention, the oil (2) (i) is chosen from oils and / or gums and / or polyorganosiloxane resins comprising at least one primary, secondary, tertiary amine or ammonium amine radical, as hydrophilic group.

diméthiconol, l'amodiméthicone. By way of suitable examples of oils (2) (i), mention may in particular be made of

dimethiconol, amodimethicone.

 According to a second variant, the oil (2) is chosen from (ii) vegetable and animal oils and their derivatives.

Examples of animal oils include sperm whale oil, whale oil, seal oil, sardine oil, herring oil, shark oil, coconut oil, Cod liver ; pork and mutton fat (tallow); beeswax.

Examples of vegetable oils include, but are not limited to, rapeseed oil, sunflower oil, peanut oil, olive oil, walnut oil, soybean oil and the like. corn oil, soybean oil, linseed oil, hemp oil, grape seed oil, coconut oil, palm oil, cottonseed oil , babassu oil, jojoba oil, sesame oil, castor oil, cocoa butter, shea butter, carnauba wax.

 As derivatives, the products derived from the alcoholysis of the abovementioned oils are firstly designated.

 Among the derivatives, mention may also be made of saturated or unsaturated fatty acids, saturated or unsaturated fatty alcohols, and fatty acid esters, or mixtures thereof.

 Advantageously, said acids comprise 8 to 40 carbon atoms, more particularly 10 to 40 carbon atoms, preferably 18 to 40 carbon atoms, and may comprise one or more ethylenic unsaturations, conjugated or otherwise, and optionally one or more hydroxyl groups. . As for the alcohols, they may comprise one or more hydroxyl groups.

 As examples of saturated fatty acids, mention may be made of palmitic, isostearic, stearic and behenic acids.

 Examples of unsaturated fatty acids that may be mentioned include myristoleic, palmitoleic, oleic, erucic, linoleic, linoleic, arachidonic and ricinoleic acids, as well as their mixtures.

 As for the alcohols, these more particularly comprise 4 to 40 carbon atoms, preferably 10 to 40 carbon atoms, optionally one or more ethylenic unsaturations, conjugated or otherwise, and possibly several

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 hydroxyl groups. Polymers comprising a plurality of hydroxyl groups may likewise be suitable, for example polypropylene glycols.

 As examples of alcohols, there may be mentioned, for example, those corresponding to the aforementioned acids.

 As regards the fatty acid esters, these can advantageously be obtained from fatty acids chosen from the compounds mentioned above. The alcohols from which these esters are prepared more particularly comprise 1 to 6 carbon atoms. Preferably, it is methyl, ethyl, propyl, isopropyl.

 According to one characteristic of the invention, the dynamic viscosity of the mixture of oils (1) and (2) is at least 5 Pa. S. Preferably, the dynamic viscosity of the mixture is at least 30 Pa, preferably at least 100 Pa.

 According to a variant of the invention, the emulsion comprises an additional compound (3) which is a water-immiscible, miscible or dispersible compound in oil (1) and miscible with oil (2).

 This compound may especially be chosen, alone or as a mixture, from: (i) an oil and / or a resin and / or a polyorganosiloxane gum having at least one hydrophilic group and whose dynamic viscosity is less than 5 Pa · s; and / or (ii) an ester comprising 10 to 20 carbon atoms, a saturated carboxylic acid, linear or branched with a saturated alcohol, linear or branched.

 Reference can be made to the description of the oil (2) (i) with respect to the description of the compound (3) (i), it being specified that said compound has a dynamic viscosity of less than 5 Pa · s.

 As regards the compound (3) (ii), the latter is preferably a C5 to C12 alkyl neopentanoate and preferably isodecyl.

 In addition, the content of additional compound (3) is such that the dynamic viscosity of the additional mixture oil (1), oil (2) and compound (3) is at least 5 Pa.s, more particularly from at least 30 Pa s, and preferably at least 100 Pa s.

 In addition, in the case where the oil (2) is not miscible or dispersible in the oil (1), the content of the compound (3) is such that the oil (2) is rendered miscible or dispersible, preferably miscible in the oil (1).

 As previously indicated, the emulsion comprises at least one ionic nonionic surfactant, at least one ionic nonionic amphiphilic copolymer, alone or in combination.

 It should be noted that the Bancroft rule can be applied to the surfactant and copolymer used (2nd World Emulsion Congress, 1997, Bordeaux, France). In

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 in other words, the soluble fraction of said compound in the continuous phase is greater than the fraction soluble in the dispersed phase.

 Thus, the surfactant and the copolymer are preferably chosen from those which satisfy both of the two conditions below: when they are mixed with the aqueous phase, at a concentration of between 0.1 and 15% by weight of said phase at 25 C, are in the form of a solution in all or part of the indicated concentration range.

 when they are mixed with the oily phase, at a concentration of between 0.1 and 15% by weight of said phase and at 25 ° C., they are in the form of a dispersion in all or part of the concentration range indicated.

The surfactant is chosen from nonionic, anionic, amphoteric, zwitterionic or cationic surfactants. However, according to a preferred embodiment of the invention, the surfactant is chosen from nonionic or anionic surfactants,
According to a first variant of the invention, the surfactant or surfactants are chosen from nonionic surfactants.

 By way of illustration, the following are especially suitable, alone or as a mixture: alkoxylated fatty alcohols, more particularly comprising from 6 to 22 carbon atoms; alkoxylated mono-, di- and tri-glycerides; alkoxylated fatty acids, more particularly comprising from 6 to 22 carbon atoms; alkoxylated sorbitan esters (cyclized sorbitol esters of fatty acids containing from 10 to 20 carbon atoms); alkoxylated fatty amines, more particularly comprising from 6 to 22 carbon atoms; - Alkoxylated alkylphenols, more particularly comprising one or two alkyl groups, linear or branched, having 4 to 12 carbon atoms; alkylpolyglucosides; polyoxyalkylenated surfactants, such as, for example, the compounds marketed under the Pluronic or Poloxamer range by the company BASF; alkoxylated mono- and di-alkanobiamides; alone or in mixtures.

 Preferably, the hydrophilic / lipophilic balance of the surfactants is greater than or equal to 10.

 According to a second variant, the surfactant (s) are (are) chosen from anionic surfactants, among which among others:

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où R représente un radical a) ky ! e en Cg-Cso, de préférence en Cio-C, R'un radical alkyle en C1-C6, de préférence en C1-C3 et M un cation alcalino-terreux. On peut citer tout particulièrement les méthyl ester sulfonates dont le radical R est en C14-C16 ;

- alkylbenzènesulfonates, plus particulièrement en Cg-Cso, tes a) ky) su) fonates primaires ou secondaires, notamment en CS-C22, les alkylglycérol sulfonates ; tes alkylsulfates par exemple de formule ROSOstvM, où R représente un radical alkyle ou hydroxyalkyle en C10-C24, de préférence en C-Co ; M un cation de même définition que ci-dessus ; - les alkyléthersulfates par exemple de formule RO (OA) nSO3M où R représente

un radical alkyle ou hydroxya) ky) e en Gio-Cg, de préférence en C-Cso ; OA représentant un groupement éthoxylé et/ou propoxylé ; M représentant un cation de même définition que ci-dessus, n variant généralement de 1 à 4, comme par exemple le lauryléthersulfate avec n = 2 ; - les alkylamides sulfates, par exemple de formule RCONHR'OS03M où R représente un radical alkyle en C2-C22, de préférence en C6-C20, R'un radical alkyle en C2-C3, M représentant un cation de même définition que ci-dessus, ainsi que leurs dérivés polyalcoxylés (éthoxylés et/ou propoxylés) ; les sels d'acides gras saturés ou insaturés, par exemple comme ceux en Cg-
C24, de préférence en C14-C20 et d'un cation alcalino-terreux, les N-acyl N-

alkyltaurates, les alkyliséthionates, les alkylsuccinamates et alkylsulfo succinates, les monoesters ou diesters de sulfosuccinates, les N-acyl sarcosinates, les polyéthoxycarboxylates ; et - les mono et di esters phosphates, par exemple de formule suivante : (RO) x-P (=O) (OM) x ou R représente un radical alkyle, alkylaryle, arylalkyle, aryle, éventuellement polyalcoxylés, x et x'étant égaux à 1 ou 2, à la condition que la somme de x et x'soit égale à 3, M représentant un cation alcalino- terreux ; seuls ou en mélanges. alkyl ester sulfonates, for example of the formula R-CH (SO 3 M) -CH 2 COOR ', or alkyl ester sulphates, for example of the formula R-CH (OSO 3 M) -CH 2 COOR',

where R represents a radical a) ky! in C 8 -C 10, preferably C 10 -C 18, R 1 is a C 1 -C 6 alkyl, preferably C 1 -C 3 alkyl, and M is an alkaline earth metal cation. Mention may especially be made of methyl ester sulfonates whose radical R is C14-C16;

alkylbenzenesulfonates, more particularly C8-C50, and (a) primary or secondary sulfonates, especially CS-C22, alkylglycerol sulphonates; alkyl sulphates, for example of the formula ROSOstvM, where R represents a C10-C24 alkyl or hydroxyalkyl radical, preferably C-Co; M a cation of the same definition as above; alkylethersulphates, for example of formula RO (OA) nSO.sub.3M, where R represents

an alkyl radical or hydroxya) ky) to Gio-Cg, preferably C-Cso; OA representing an ethoxylated and / or propoxylated group; M representing a cation of the same definition as above, n generally ranging from 1 to 4, such as, for example, lauryl ether sulfate with n = 2; the alkylamide sulphates, for example of formula RCONHR'OSO3M where R represents a C2-C22 alkyl radical, preferably C6-C20 radical, R 'a C2-C3 alkyl radical, M representing a cation of the same definition as hereinafter above, and their polyalkoxylated derivatives (ethoxylated and / or propoxylated); saturated or unsaturated fatty acid salts, for example as those in C 8
C24, preferably C14-C20, and an alkaline earth cation, N-acyl N-

alkyltaurates, alkylisethionates, alkylsuccinamates and alkylsulfosuccinates, monoesters or diesters of sulfosuccinates, N-acyl sarcosinates, polyethoxycarboxylates; and the mono and di phosphate esters, for example of the following formula: (RO) xP (= O) (OM) x or R represents an alkyl, alkylaryl, arylalkyl or aryl radical, optionally polyalkoxylated, x and x being equal to 1 or 2, with the proviso that the sum of x and x is equal to 3, M representing an alkaline earth cation; alone or in mixtures.

 Preferably, the hydrophilic / lipophilic balance of the surfactants is greater than or equal to 10.

quaternaire. De préférence, la balance hydrophile/lipophile des tensioactifs est e supérieure ou égale à 10. Among the cationic surfactants, mention may be made of aliphatic or aromatic fatty amines, aliphatic fatty amides and ammonium derivatives.

quaternary. Preferably, the hydrophilic / lipophilic balance of the surfactants is greater than or equal to 10.

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 Among the zwitterionic or amphoteric surfactants, mention may be made of betaines and their derivatives, sultaines and their derivatives, lecithins, imidazoline derivatives, glycinates and their derivatives, amidopropionates, fatty amine oxides. Preferably, the hydrophilic / lipophilic balance of the surfactants is greater than or equal to 10.

 According to another possibility, the emulsion comprises at least one nonionic or ionic amphiphilic polymer.

 Preferably, said copolymers have at least one hydrophilic segment and at least one hydrophobic segment.

 As regards more particularly the hydrophobic segment of the copolymer, this can be obtained from one or more of the following monomers: esters of mono-or poly-carboxylic acids, linear, branched, cyclic or aromatic, comprising at least one ethylenic unsaturation, and optionally bearing a hydroxyl group; apethylenically unsaturated nitrites, vinyl ethers, vinyl esters, vinylaromatic monomers, vinyl or vinylidene halides, linear or branched aromatic or non-aromatic hydrocarbon monomers comprising at least one ethylenic unsaturation, propylene oxide, butylene oxide, siloxane monomers, perfluorinated monomers, alone or as mixtures, and macromonomers derived from such monomers.

de vinyle, le chlorure de vinylidène, le méthyl vinyléther, l'methyl vinyléther ; - les nitriles vinyliques incluent plus particulièrement ceux ayant de 3 à 12 atomes de carbone, comme en particulier l'acrylonitril et le méthacrylonitrile ; - le styrène, l'a-méthylstyrène, le vinyltoluène, le butadiène, l'isoprène, le chloroprène ; - l'oxyde de propylène, l'oxyde de butylène, seuls ou en mélanges, ainsi que les macromonomères dérivant de tels monomères. As particular examples of hydrophobic monomers capable of entering into the preparation of the hydrophobic segment (s) of the segmented amphiphilic copolymer, mention may be made of: (meth) acrylic acid esters with an alcohol comprising 1 to 12 atoms of carbon such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, (meth) acrylate, ) isobutyl acrylate, 2-ethylhexyl acrylate; vinyl acetate, Versatate &commat; vinyl, vinyl propionate, chloride

vinyl chloride, vinylidene chloride, methyl vinyl ether, methyl vinyl ether; vinyl nitriles more particularly include those having from 3 to 12 carbon atoms, such as in particular acrylonitrile and methacrylonitrile; styrene, α-methylstyrene, vinyltoluene, butadiene, isoprene, chloroprene; - Propylene oxide, butylene oxide, alone or in mixtures, as well as macromonomers derived from such monomers.

<Desc / Clms Page number 13>

 The preferred monomers are esters of acrylic acid with linear or branched C 1 -C 4 alcohols such as methyl acrylate, ethyl acrylate, propyl acrylate and butyl acrylate, vinyl esters such as vinyl acetate, styrene, α-methylistyrene.

 As regards the hydrophilic segment of the amphiphilic copolymer, the latter can be obtained from one or more monomers having an ionic or ionizable function.

 It is specified that under the pH conditions of use of the copolymer, the functions of the ionic segment (s) of the copolymer are in at least partially ionized form (dissociated). More particularly, at least 10 mol% of the functions of the segment or segments are in ionized form. The determination of this value does not pose a problem to those skilled in the art; it is in particular a function of the pKa ionizable functions of the copolymer units and the number of these functions (ie the number of moles of monomer bearing ionizable functions used during the preparation of the copolymer).

 More particularly, with regard to the anionic or anionizable monomers, mention may be made of those comprising at least one carboxylic, sulphonic, sulfuric, phosphonic, phosphoric and sulphosuccinic function, and their salts, as well as the corresponding macromonomers.

 More precisely, the anionic or anionizable monomer or monomers may be chosen from the following: linear or branched, cyclic or aromatic mono-or poly-carboxylic acids, N-substituted derivatives of such acids; monoesters of polycarboxylic acids, comprising at least one ethylenic unsaturation; linear, branched, cyclic or aromatic vinyl carboxylic acids; amino acids comprising one or more ethylenic unsaturations; alone or in mixtures, their precursors, their sulfonic or phosphonic homologues, their salts, as well as the macromonomers deriving from such monomers or their salts.

propène 1-sulfonique, l'acide méthallyl sulfonique, l'acide styrène sulfonique, l'acide a-acrylamido méthylpropane suifonique, le 2-sulfoéthylène méthacylate, l'acide sulfopropyl acrylique, l'acide bis-sulfopropyl acrylique, l'acide bis- sulfopropyl méthacrylique, l'acide sulfatoéthyl méthacrylique, le monoester phosphate d'acide hydroxyéthyl méthacrylique, ainsi que les sels de métal alcalin, comme le sodium, le potassium, ou d'ammonium ; As examples of anionic / anionizable monomers, mention may be made without intention of being limited thereto: acrylic acid, methacrylic acid, fumaric acid, itaconic acid, citraconic acid, maleic acid, acrylamido glycolic acid, 2-

1-sulfonic propene, methallyl sulfonic acid, styrene sulfonic acid, α-acrylamido methylpropane sulfonic acid, 2-sulfoethylene methacrylate, sulfopropyl acrylic acid, bis-sulfopropyl acrylic acid, bis acid sulfopropyl methacrylic acid, sulfatoethyl methacrylic acid, hydroxyethyl methacrylic acid monoester phosphate, as well as alkali metal salts, such as sodium, potassium, or ammonium;

<Desc / Clms Page number 14>

 vinyl sulfonic acid, vinylbenzene sulphonic acid, vinylphosphonic acid, vinylidenephosphonic acid, vinylbenzoic acid and alkali metal salts such as sodium, potassium or ammonium ; N-methacryloyl alanine, N-acryloyl-hydroxy-glycine; alone or in mixtures, as well as the macromonomers derived from such monomers.

 It is not beyond the scope of the present invention using precursor monomers of those just mentioned. In other words, these monomers have units which, once incorporated into the polymer chain, can be converted, in particular by a chemical treatment such as hydrolysis, to give back the aforementioned anionic / anionizable species. For example, the fully or partially esterified monomers of the aforementioned monomers can be used to be subsequently hydrolyzed in whole or in part.

 According to another possibility, the hydrophilic segment or segments can be obtained from one or more monomers having a cationic or cationizable function.

 As such, can be implemented: - aminoalkyl (meth) acrylates, aminoalkyl (meth) acrylamides; monomers comprising at least one secondary, tertiary or quaternary amine functional group, or a heterocyclic group containing a nitrogen atom, vinylamine, ethylene imine; - ammonium salts of diallyldialkyl alone or in mixtures, or the corresponding salts; as well as macromonomers derived from such monomers.

 If they are in the form of salts, the latter are preferably chosen such that the counterion is a halide such as for example a chloride, or a sulphate, a hydrosulphate, an alkyl sulphate, a phosphate, a citrate, a formate, an acetate.

 In addition, the ammonium function comprises at least one alkyl or aryl radical optionally carrying one or more alkyl radicals having 1 to 6 carbon atoms, preferably methyl or ethyl.

 Examples of suitable cationic monomers include the following monomers: - dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, ditertiobutylaminoethyl (meth) acrylate, dimethylamino methyl (meth) acrylamide, dimethylamino propyl (meth) acrylamide; ethylene imine, vinylamine, 2-vinylpyridine, 4-vinylpyridine

<Desc / Clms Page number 15>

 trimethylammonium chloride ethyl (meth) acrylate, trimethylammonium methyl sulfate ethyl acrylate, benzyl dimethylammonium chloride ethyl (meth) acrylate, 4-benzoylbenzyl dimethyl ammonium chloride ethyl acrylate, trimethyl ammonium chloride ethyl (meth) acrylamido trimethyl ammonium chloride of vinylbenzyl; diallyldimethyl ammonium chloride; alone or in mixtures, or their corresponding salts.

 Finally, the hydrophilic segment (s) of the amphiphilic copolymer can be obtained from nonionic hydrophilic monomer (s).

 As examples of nonionic hydrophilic monomers, mention may be made of ethylene oxide; the amides of linear or branched, cyclic or aromatic mono-or poly-carboxylic acids, comprising at least one ethylenic unsaturation or derivatives; hydrophilic esters derived from (meth) acrylic acid; the vinyl esters making it possible to obtain polyvinyl alcohol blocks after hydrolysis; vinypyrrolidone; monomers of the type of sugars such as (meth) acrylates of oligosaccharides or oligoholosides, as well as macromonomers derived from these monomers.

 As regards the preferred nonionic hydrophilic monomers, mention may be made especially of (meth) acrylamide, N-methylol (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, vinyl esters which make it possible to obtain blocks polyvinyl alcohol after hydrolysis, such as vinyl acetate, vinyl Versatate, vinyl propionate.

 Such monomers can be used alone or in mixtures, as well as in the form of macromonomers.

 The copolymers used in the context of the invention may be linear. In this case and advantageously, the copolymers used are multiblock copolymers, and preferably diblocks or triblocks.

 It is also possible to use a comb copolymer, one of which is hydrophilic, the other hydrophobic.

 According to this embodiment, a copolymer whose skeleton is hydrophilic and the pendant groups are hydrophobic or the reverse is indifferently used. However, it is preferred to use a hydrophilic backbone copolymer and hydrophobic pendant groups.

 It is specified that the hydrophobic segment of the copolymer may comprise one or more hydrophilic units, and the hydrophilic segment may comprise one or more hydrophobic units.

<Desc / Clms Page number 16>

 Moreover, if a segment of the copolymer consists of several monomers, the distribution of these in the segment can be statistical, block or in a concentration gradient.

 The copolymers that can be used in the context of the invention can be prepared by using anionic, cationic, so-called living or controlled radical polymerizations. It is likewise possible to use, depending on the monomers employed, a group transfer polymerization (known as a "transfer group") or a ring-opening polymerization (in particular a case of polymerization from an N-carboxy anhydride ring). or by a polymerization involving a transesterification of end groups.

 Preferably, the polymers are obtained by carrying out at least one living radical polymerization step.

 By way of example of so-called living or controlled polymerization processes, reference may especially be made to: xanthate-controlled radical polymerization according to the teaching of the application WO 98/58974, WO 00/75205, WO 01/42312 the controlled radical polymerization by the dithioesters according to the teaching of the application WO 98/01478, the polymerization with the aid of nitroxide precursors according to the teaching of the application WO 99/03894, the radical polymerization controlled by the dithiocarbamates according to the teaching of the application WO 99/31144, the radical polymerization by atom transfer (ATRP) according to the teaching of the application WO 96/30421.

 In the case of polymers carrying grafts (comb polymers), they can in particular be obtained by various methods, such as for example a copolymerization of a monomer with a macromonomer. More particularly, this method implements in a first step the grafting at the end of the segment of a radically polymerizable function. This grafting can be carried out by usual methods of organic chemistry. Then, in a second step, the macromonomer thus obtained is polymerized with the monomer chosen to form the skeleton and a so-called "comb" polymer is obtained.

 It is likewise possible to obtain comb polymers by polymerization of a monomer followed by grafting on the skeleton thus obtained. The grafting of the lateral polymeric segments on a skeletal polymer segment may be carried out according to conventional techniques familiar to those skilled in the art (European Polymer Journal 4,343 (1968) for example). Among these conventional techniques, mention may be made of so-called direct grafting.

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 In the more particular context of segmented copolymers comprising repeating units having one or more silicon atoms, reference can be made to the description of the application WO 02/08307 published on 31/01/02, detailing a process for obtaining such copolymers.

 In addition, in the latter category of copolymers, it would not depart from the scope of the invention using compounds of the type of polydimethylsiloxane block copolymers polyether polyalkyl graft (Tegopren &commat; -marketed by Goldschmidt).

 The copolymers more particularly have a molar mass by weight of at most 50000 g / mol, preferably at most 20000 g / mol (absolute mass, measured by Multi-Angle Laser Light Scattering coupled with steric exclusion chromatography).

 Moreover, the weight average molar mass of the copolymer is advantageously at least 2500 g / mol, preferably at least 5000 g / mol (absolute mass, MALLS / steric exclusion chromatography).

 It is not beyond the scope of the present invention to add to the assembly consisting of the oil (1), the oil (2) and optionally the additional compound (3), at least one solubilized or dispersed active ingredient.

 By way of examples of active substances that may be used for this purpose, mention may be made of lipophilic vitamins, such as vitamin A and its derivatives, in particular its esters, such as acetate, palmitate, propionate, vitamin B2 and pantothenic acid. vitamin D and vitamin E; mono-, di- and triglycerides; bactericides; UV-absorbing agents, such as aminobenzoate derivatives, especially of the PABA type, as well as mineral anti-UV agents (titanium oxide), salicylates, cinnamates, anthranilates, dibenzoylmethanes, camphor derivatives and their mixtures.

 Anti-aging agents can likewise be used. Examples of such agents that may be mentioned include retinoids, fat-soluble vitamins, vitamin C derivatives such as esters including acetate, propionate, palmitate; ceramides, pseudo-ceramides, phosphotipids, fatty acids, fatty alcohols, cholesterol, sterols and mixtures thereof. Preferred fatty acids and alcohols include, for example, those having linear or branched alkyl chains containing from 12 to 20 carbon atoms. It may in particular be linoleic acid.

 It is likewise possible to use anti-cellulite agents, such as in particular isobutylmethylxanthine and theophylline; as well as anti-acne agents, for example resorcinol, resorcinol acetate, benzoyl peroxide and many natural compounds.

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 Aromas, perfumes, essential oils, essences can also be used as hydrophobic active material. By way of example, mention may be made of oils and / or essences of mint, spearmint, peppermint, menthol, vanilla, cinnamon, laurel, anise, eucalyptus, thyme, sage, cedar leaf, nutmeg, citrus (lemon, lime, grapefruit, orange), fruit (apple, pear, peach, cherry, plum, strawberry, raspberry, apricot, pineapple, grape, etc.). ), alone or in mixtures. It is also possible to use compounds such as benzaldehyde, isoamyl acetate, ethyl butyrate and the like.

 The antimicrobial agents may be selected from thymol, menthol, triclosan, 4-hexylresorcinol, phenol, eucalyptol, benzoic acid, benzoic peroxide, butyl paraben, and mixtures thereof.

 Furthermore, according to a particular embodiment of the invention, the direct emulsion entering the composition has an oil phase / aqueous phase weight ratio of between 50/50 and 90/10.

 In addition, advantageously; the weight ratio oil (1) / oil (2) is between 5/95 and 95/5, more particularly between 50/50 and 95/5, preferably between 75/25 and 90/10.

 As regards the content of additional compound (3), this is more particularly such that the oil (2) is rendered miscible or solubilized in the oil (1), preferably solubilized in the oil ( 1).

 In addition, the additional compound content (3) is such that the dynamic viscosity of the mixture of the oils (1) and (2) and the additional compound (3) is at least 5 Pa.s, more particularly at least 30 Pa, preferably at least 100 Pa.

 By way of illustration, the additional compound (3) / oil (1) weight ratio is between 3/2 and 3/1.

 With respect to the surfactant and / or copolymer present in the emulsion, the latter, whether in the form of one or more species, are present in an amount of less than or equal to 90% by weight, expressed relative to the weight of oil (1), oil (2) and additional compound (3) if it is present, more particularly less than or equal to 30% by weight relative to the same reference.

 According to an entirely advantageous embodiment, the surfactant and / or copolymer content present in the emulsion is less than or equal to 15% by weight, expressed relative to the weight of oil (1), oil (2) and additional compound (3) if it is present, more particularly between 0.1 and 15% by weight, expressed with respect to the same reference, preferably between 5 and 10% by weight, expressed by report to the same reference.

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 As for the optional active ingredient, its content represents more particularly 10 to 50% by weight of said oil phase of the emulsion, that is to say of the assembly comprising the oil (1), the oil ( 2) and if necessary, the additional compound (3).

 It is specified that the average size of the droplets of the emulsion is between 0.05 and 300 μm, more particularly between 0.05 and 100 μm and preferably between 0.1 and 70 μm. Even more preferably, the average size of the droplets is between 0.1 and 2 μm. It is recalled that the average size of the droplets corresponds to the median diameter determined according to the volume of the droplets and means that 50% by volume of the droplets has a size less than or equal to the range mentioned above. It is also measured using a Horiba granulometer.

 The emulsion can be obtained by any means known to those skilled in the art.

 According to a first embodiment, the process for preparing the emulsion comprises mixing a mixture comprising the oil (1), the oil (2), optionally the additional compound (3) and water.

 More specifically, and according to a first embodiment, the emulsification operation is carried out by introducing the oils (1), (2) and the additional compound into a water-surfactant (s) or copolymer (s) mixture.

 The assembly is then kneaded advantageously in apparatuses of the type of single or multiple screw extruders, planetary turbine mixers, static mixers, blade mixers, propeller mixers

 The kneading is carried out more particularly at a temperature of the order of 10 to 50 C in kneaders.

 Moreover, the duration and the shearing conditions are sufficient to obtain an oil-in-water type emulsion in the aforementioned range.

 Advantageously, the amount of water is such that the viscosity of said mixture is close to or greater than the viscosity of the oil (1).

 It is not impossible, after obtaining the emulsion, to dilute it with a suitable aqueous medium.

 According to a second embodiment, the process for preparing the emulsion consists of adding water to a mixture of the oils (1), (2), these being present in whole or in part, and of the additional compound ( 3) and surfactant and / or copolymer.

 The mixture is then kneaded under the same conditions as those explained above.

 The possibly remaining amount of oils (1), (2), is introduced into the medium after the formation of the oil-in-water emulsion, while maintaining the mixing.

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 According to a third embodiment, the emulsion may be prepared using a method without grinding.

 More particularly, the process comprises two steps. The first consists of preparing a primary oil-in-water emulsion, by adding an aqueous phase to a mixture comprising the surfactant and / or copolymer, the oils (1) and (2) and optionally the additional compound (3), under a shear less than 100s-1.

 During this step, the proportion of phase comprising the oils does not exceed the maximum proportion beyond which the addition of the aqueous phase does not make it possible to obtain an oil-in-water type emulsion.

 In addition, the surfactant and / or polymer / water weight ratio in the primary emulsion is such that a surfactant / copolymer and water mixture in the same proportions results in an organized phase excluding an inverse phase. This organized phase may be a lamellar and / or micellar phase.

 Preferably, during this step, the aqueous phase is added at once to the phase comprising the oils, in the absence of shear. It is only after the addition is complete that the mixture is stirred until the oil-in-water emulsion is obtained.

 The second step consists in enriching the primary emulsion by introducing into the obtained primary emulsion, an enrichment phase comprising the oils (1), (2) and optionally the additional compound (3), by mixing under lower shear. at 10Os-1.

 Preferably, the composition of the enrichment phase is the same as that of the oil phase implemented during the first step.

 In addition, it advantageously represents 25 to 100% by weight of the oil phase of the primary emulsion, preferably 75 to 100% by weight.

 It is specified that the amount of enrichment phase added is less than the maximum proportion beyond which the addition of the enrichment phase does not make it possible to obtain an oil-in-water type emulsion.

 Preferably, during this step, the enrichment phase is added at once to the primary emulsion, in the absence of shear. It is only after the addition is complete that the mixture is stirred until the oil-in-water emulsion is obtained.

 It is possible to repeat these two steps so as to obtain an emulsion whose proportions and composition are appropriate, and / or so as to obtain an emulsion whose particle size corresponds to that mentioned previously.

 Usually, this third variant is carried out at a temperature less than or equal to 35 C, preferably between 15 and 35 C.

 This process has been the subject of an international application WO 01/18095.

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 The composition according to the invention has an emulsion content more particularly between 0.1 and 10% by weight, more particularly between 0.5 and 5% by weight, preferably between 0.5 and 3% by weight.

 It is conceivable that a composition comprises more than one emulsion as just defined (that is to say consisting of a co-emulsion of oils (1), (2) and optionally of the compound (3) additional).

 As mentioned above, the emulsion according to the invention is added to the cosmetic composition, unlike the existing compositions for which only a mixture of emulsions is used, the latter being capable of being prepared during the manufacture of the cosmetic composition.

 As mentioned before, the aqueous composition according to the invention is intended to be rinsed.

 According to a first embodiment, the composition according to the invention is a cosmetic composition intended for the treatment of keratinous surfaces (skin, hair).

 A first variant of this embodiment consists of a composition comprising at least 1% by weight of anionic surfactants. More particularly, the content of anionic surfactants is between 1 and 50% by weight of the composition, and preferably between 10 and 25% by weight.

 The anionic surfactants described above, which can be used in the emulsion, can be used in cosmetic compositions. We can therefore refer to this list.

 A second variant of this embodiment consists of a composition free of anionic surfactants.

 Whatever variant is chosen, the cosmetic composition comprises the conventional additives in the field.

 Preferably, the cosmetic compositions in accordance with the invention use a vehicle, generally water, or a mixture of several vehicles, present in said compositions at concentrations of between 0.5 and 99.5% approximately. and more preferably between 5 and 90% approximately.

 The vehicles compatible with the compositions according to the invention comprise, for example, those used in foams, gels, shampoos, after-shampoos, or rinse lotions and creams.

Of course the choice of the appropriate vehicle depends on the specific application targeted by the formulation.

The vehicles that can be used can therefore be simple or complex and include a large number of products usually used in cosmetic formulations intended for hair, skin or sun use.

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 It can thus be water supplemented optionally in a solubilizer to dissolve or disperse the active ingredients used, such as C2-C8 alcohols, and mixtures thereof, in particular ethanol, isopropanol or propylene glycol, and mixtures thereof.

 When the cosmetic formulations are in the form of sprays, lotions, tonics, gels, or foams, the preferred solvents include water, ethanol, volatile silicone derivatives, and mixtures thereof. The solvents used in these mixtures may be miscible or immiscible with each other. Foams and aerosol sprays can also use any propellant capable of generating the products in the form of foam or fine, uniform sprays. By way of examples, mention may be made of dimethyl ether, propane, n-butane, or isobutane.

 In parallel with the vehicles previously identified, the cosmetic compositions according to the invention may contain surfactants, used to disperse, solubilize and stabilize various additional compounds. These surfactants may be of the anionic, nonionic, cationic, zwitterionic or amphoteric type and are preferably chosen from the surfactants identified above.

 As is apparent from the foregoing, the cosmetic compositions according to the present invention have the main purpose of delivering and depositing on target surfaces, cutaneous or capillary, for example the active ingredient which is formulated. This composition must therefore allow the deposition at the treated surface of the active ingredient, which must remain there after the formulation is removed by washing and rinsing. Insofar as these deposition surfaces are negatively charged, the usual approach for carrying out this deposition consists in associating with the active material cationic compounds and more particularly cationic polymers.

comme Polymer JR 400), polyquaternium-11, polyquaternium-12, polyquaternium-13, polyquaternium-14, polyquaternium-15, polyquaternium-16, polyquaternium-17, polyquaternium-18, polyquaternium-19, polyquaternium-20, polyquaternium-24, polyquaternium-27, polyquaternium-28, polyquaternium-29 (également connu comme Kytamer KCO disponible auprès de Amerchol), polyquaternium-30, polyquaternium-31, polyquaternium-32, polyquaternium-33, polyquaternium-34, polyquaternium-35, polyquaternium-36, polyquaternium-37, polyquaternium-39, polyquaternium-44 et polyquaternium-55. The cationic polymers which are more particularly useful for this conditioning function are, in particular, polyquaternium-type polymers, for example polyquaternium-1, polyquaternium-2, polyquaternium-4, polyquaternium-5, polyquaternium-6 (also known as Merquat 1000 available). from Calgon), polyquaternium-7 (also known as Merquat 5500 available from Calgon), polyquaternium-8, polyquaternium-9, polyquaternium (also known

such as Polymer JR 400), polyquaternium-11, polyquaternium-12, polyquaternium-13, polyquaternium-14, polyquaternium-15, polyquaternium-16, polyquaternium-17, polyquaternium-18, polyquaternium-19, polyquaternium-20, polyquaternium-24, polyquaternium-27, polyquaternium-28, polyquaternium-29 (also known as Kytamer KCO available from Amerchol), polyquaternium-30, polyquaternium-31, polyquaternium-32, polyquaternium-33, polyquaternium-34, polyquaternium-35, polyquaternium-36 , polyquaternium-37, polyquaternium-39, polyquaternium-44 and polyquaternium-55.

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 Cationic derivatives of polysaccharides, such as cocodimonium hydroxyethyl cellulose, hydroxypropyl trimonium chloride guar, hydroxypropyl guar hydroxypropyl trimonium chloride (Jaguar C 13S, Jaguar C14S, Jaguar C17, Jaguar Excel, Jaguar C162, marketed by RHODIA) are also suitable. poly (oxyethanediyl-1,2) hydroxy-2-trimethylammonium-3-propyl cellulose or polyquaternium-10 ether.

 The cosmetic compositions may also contain polymers having film-forming properties that can be used to provide a fixing function. These polymers are generally present at concentrations of between 0.01 and 10%, preferably between 0.5 and 5%. They are preferably of the polyvinylpyrrolidone type, copolymers of polyvinylpyrrolidone and of methyl methacrylate, copolymer of polyvinylpyrrolidone and of vinyl acetate, ethylene glycol polyterephthalate / polyethylene glycol copolymers, and sulfonated terephthalic copolyester polymers.

 It is also possible to incorporate moisturizing agents into the cosmetic compositions. As an illustration of these, there may be mentioned glycerol, propylene glycol, urea, collagen, gelatin, and emollients which are generally selected from alkylmonoglycerides, alkyldiglycerides, triglycerides such as oils extracted from plants and plants or their hydrogenated derivatives, mineral oils or paraffinic oils, diols, fatty esters, silicones.

 Preservative agents such as the esters of phydroxybenzoic acid, sodium benzoate, or any chemical agent that prevents bacterial growth or mold and is traditionally used in cosmetic compositions are generally introduced into these compositions at a level of 0.01 to 3%. in weight.

de tara ou de cassia, la gomme xanthane tel que le Rhodicare, les succinoglycanes, les alginates, les carraghénannes, les dérivés de la chitine ou tout autre polysaccharide à fonction texturante. Finally, the cosmetic compositions may also contain viscosifying or gelling polymers such as crosslinked polyacrylates of CARBOPOL type marketed by BF Goodrich, acrylic anionic copolymers of ACULYNE type marketed by 18P (International Specialty Products), cellulose derivatives such as hydroxypropylcellulose , carboxymethylcellulose, guars and their derivatives such as hydroxypropyl guar such as Jaguar HP &commat; carob, gum

tara or cassia, xanthan gum such as Rhodicare, succinoglycans, alginates, carrageenans, chitin derivatives or any other polysaccharide with texturing function.

 According to a second embodiment, the composition according to the invention is a composition intended to be used for the treatment of textile fibers.

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 According to a third embodiment, the composition according to the invention is a composition intended to be used in the field of detergency.

 Another subject of the invention relates to the use of the emulsion which has just been described in aqueous cosmetic compositions intended to be rinsed.

 All that has been said about this emulsion and its various constitutive elements remains of course valid and will not be repeated here.

 Another object of the invention is the use of the emulsion which has just been described in formulations intended to be rinsed for the treatment of textiles, whether in the form of fibers or fabrics. More particularly, the textile is cotton.

 A third object of the invention is constituted by the use of said emulsion in detergent formulations, more particularly intended for washing laundry. More specifically, the emulsion can be added to formulations for softening laundry.

 In the applications mentioned above, the emulsion represents an agent promoting the deposition of at least one oil (1) on the surface to be treated.

 A concrete but non-limiting example of the invention will now be presented.

EXAMPLE
This example relates to the use of a co-emulsion of dimethicone and dimethiconol oils to increase the hair deposit of dimethicone emulsion from a shampoo formula.

The characteristics of the silicone oils used are given in the table below:

<Tb>
<tb> Products <SEP> RHODIA <SEP> Viscosity <SEP> of <SEP> Oil
<tb> (m <SEP> Not)
<tb> Oil <SEP> (1) <SEP> Dimethicone <SEP> 500 <SEP> 000
<tb> Rhodorsil <SEP> 47V500000
<tb> Oil <SEP> (2) <SEP> Dimethiconol <SEP> 80 <SEP> 000
<tb> Rhodorsil <SEP> 48V80 <SEP> 000
<Tb>

The values of the viscosities are the values of the dynamic viscosities measured at 25 ° C. using a BROOKFIELD viscometer according to the indications of the AFNOR NFT 76102 standard.

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The shampoo formulations used are given in Table (A) below:

<Tb>
<tb> COMPOUNDS <SEP> INCl <SEP> F1 <SEP> (*) <SEP> F2 <SEP> (*) <SEP> F3 <SEP> (*) <SEP> F4 <SEP> (*)
<tb> Water <SEP> Qsp <SEP> 100 <SEP> Qsp <SEP> 100 <SEP> Qsp <SEP> 100 <SEP> Qsp <SEP> 100
<tb> Jaguar <SEP> C-13S &commat;<SEP> Guar <SEP> 0.3 <SEP> 0.3 <SEP> 0.3 <SEP> 0.3
<tb> Hydroxypropylrimonium <SEP> chloride
<tb> Tegobetaine <SEP> L7 <SEP> 8 <SEP> Cocamidopropyl <SEP> 2 <SEP> 2 <SEP> 2 <SEP> 2
<tb> Betaine
<tb> Empicol <SEP> ESB / 3M <SEP>#<SEP> Sodium <SEP> Laureth <SEP> 14 <SEP> 14 <SEP> 14 <SEP> 14
<tb> Sulfate
<tb> Emulsion <SEP> Oil <SEP> (1) <SEP> Dimethicone <SEP> 3
<tb> Size <SEP> s <SEP> 1 <SEP> um
<tb> Emulsion <SEP> Oil <SEP> (2) <SEP> Dimethiconol <SEP> 3
<tb> Size <SEP> s <SEP> 1 <SEP> um
<tb> Co-emulsion <SEP> Dimethiconol <SEP>&<SEP> 3
<tb> [85% <SEP> Oil <SEP> (1) <SEP> Dimethicone
<tb> 15% <SEP> Oil <SEP> (2)]
<tb> mock <SEP> s <SEP> 1 <SEP>! <SEP> lm
<tb> Mixture <SEP>: <SEP> Dimethiconol <SEP>&<SEP> 3
<tb> 85 <SEP>% <SEP> emulsion <SEP> Oil <SEP> (1) <SEP> Dimethicone
<tb> 15 <SEP>% <SEP> emulsion <SEP> Oil <SEP> (2)
<tb> Size <SEP> s <SEP> 1 <SEP> reads
<Tb>
(*)% of active ingredient.

The size of the emulsion corresponds to the average size or median diameter, that is, the diameter of the particle equal to 50% of the cumulative distribution. Measure with Horiba granulometer)
Strands of Caucasian type hair, brown, are respectively washed with the shampoos referenced in Table (A).

 After rinsing and drying the locks of treated hair, the deposition of silicone on the locks of hair is determined by X-ray fluorescence.

 For each of the formulations, the results of the amount of silicone emulsion deposited on the locks of hair are shown in Table (B) below:

<Desc / Clms Page number 26>

<Tb>
<tb> COMPOUNDS <SEP> F1 <SEP> F2 <SEP> F3 <SEP> F4
<tb> Quantity <SEP> of emulsion <SEP> silicone <SEP> deposited <SEP> 435 <SEP> 437 <SEP> 590 <SEP> 465
<tb> (ppm)
<Tb>

Claims (23)

 1. An aqueous composition intended to be rinsed, comprising an oil-in-water emulsion comprising: an oil (1) consisting of at least one polyorganosiloxane oil free of hydrophilic group and whose dynamic viscosity is at least 5 Pa; s; an oil (2) immiscible with water and miscible or dispersible in the oil (1) possibly by means of an additional compound (3) chosen from: (i) at least one oil and / or one resin and / or a polyorganosiloxane gum having at least one hydrophilic group, and / or (ii) at least one vegetable or animal oil, or derivatives thereof; at least one nonionic, ionic surfactant, at least one nonionic, ionic amphiphilic copolymer, alone or in combination; the dynamic viscosity of the mixture of the oil (1), the oil (2) and, if appropriate, the additional compound (3) being at least 5 Pa.s; said emulsion being prepared prior to its introduction into the composition, by emulsification of a mixture of the oil (1), the oil (2) and, if appropriate, of the additional compound (3). 2. Composition according to the preceding claim, characterized in that the oil (1) is chosen from polyorganosiloxane oils consisting in whole or in part of units of formulas: R'3-aRaSiOl / 2 (M-unit) and / or R2SiO (D-unit) where: a is an integer from 0 to 3; the radicals R are identical or different and represent: a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to 15 carbon atoms, optionally carrying one or more halogen atoms, or aromatic containing from 6 to 13 carbon atoms; * a hydrogen atom; the radicals R 'are identical or different and represent an alkoxy or alkenyloxy group containing from 1 to 10 carbon atoms; an aryloxy group containing from 6 to 13 carbon atoms. <Desc / Clms Page number 28> 3. Composition according to the preceding claim, characterized in that at least 80 mol% of the radicals R of the oil (1) represent a methyl group. 4. Composition according to one of the preceding claims, characterized in that the oil (1) is chosen from polyorganosiloxane oils whose dynamic viscosity is at least 30 Pa, preferably at least 100 Pa. s. 5. Composition according to one of the preceding claims, characterized in that the oil (2) (i) is chosen from compounds having at least one hydrophilic group selected from hydroxyl functions, ether, amine, amide, ester, carboxylic , phosphoric, phosphonic, sulfuric, sulphonic, sulphosuccinic, or the corresponding salts 6. Composition according to one of the preceding claims, characterized in that the oil (2) (i) is chosen from oils and / or gums and / or polyorganosiloxane resins consisting in whole or in part of units of formula: R ' Wherein: a is an integer from 0 to 3, the radicals R, which may be identical or different, represent: a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to 15 carbon atoms, preferably from 1 to 15 carbon atoms; 10 carbon atoms; an aromatic hydrocarbon group containing from 6 to 13 carbon atoms; a hydrophilic organic group bonded to silicon by an Si-C bond or Si-O-C; a hydrogen atom: the radicals R ', which may be identical or different, represent an OH group or an alkoxy or alkenyloxy group containing from 1 to 10 carbon atoms; an aryloxy group containing from 6 to 13 carbon atoms; an amino-or amido-functional group containing from 1 to 6 carbon atoms bonded to silicon by an Si-N bond. 7. Composition according to one of Claims 5 or 6, characterized in that the oil (2) (i) is chosen from oils and / or gums and / or polyorganosiloxane resins comprising at least one hydroxyl radical as a grouping. hydrophilic, preferably dimethiconol. <Desc / Clms Page number 29> 8. Composition according to one of Claims 5 to 7, characterized in that the oil (2) (i) is chosen from oils and / or gums and / or polyorganosiloxane resins comprising at least one primary, secondary amine radical, tertiary or ammonium, as a hydrophilic group. 9. Composition according to one of the preceding claims, characterized in that the additional compound (3), immiscible with water, miscible or dispersible in oil (1) and miscible with oil (2), chosen among: (i) an oil and / or a resin and / or a polyorganosiloxane gum having at least one hydrophilic group and whose dynamic viscosity is less than 5 Pa. s; and / or (ii) an ester comprising 10 to 20 carbon atoms, a saturated carboxylic acid, linear or branched with a saturated alcohol, linear or branched. 10. Composition according to the preceding claims, characterized in that the emulsion is such that the oil / aqueous phase weight ratio is between 50/50 and 90/10. 11. Composition according to the preceding claims, characterized in that the weight ratio oil (1) / oil (2) is between 5/95 and 95/5, more particularly between 50/50 and 95/5, preferably between 75/50 and 95/5. / 25 and 90/10. 12. Composition according to one of the preceding claims, characterized in that the additional compound weight ratio (3) / oil (1) is between 3/2 and 3/1. 13. Composition according to one of the preceding claims, characterized in that the emulsion comprises a surfactant content less than or equal to 90% by weight, expressed relative to the weight of oil (1), oil (2). and additional compound (3), preferably less than or equal to 30% by weight, expressed with respect to the same reference. 14. Composition according to the preceding claim, characterized in that the emulsion comprises a surfactant content less than or equal to 15% by weight, expressed relative to the weight of oil (1), oil (2) and compound additional (3), preferably between 5 and 10% by weight, expressed with respect to the same reference. <Desc / Clms Page number 30>  15. Composition according to one of the preceding claims, characterized in that the average size of the emulsion droplets is between 0.05 and 300 μm,

 more particularly between 0.05 and 100 μm, preferably between 0.1 and 70 μm. 16. Composition according to one of the preceding claims, characterized in that it comprises an emulsion content of between 0.1 and 10% by weight, more particularly between 0.5 and 5% by weight, preferably between 0, 5 and 3% by weight. 17. Composition according to one of the preceding claims, characterized in that all of the oil (1), the oil (2) and optionally the additional compound (3) comprises at least one solubilized or dispersed active ingredient. . 18. Composition according to one of the preceding claims, characterized in that the composition is a cosmetic composition intended for the treatment of keratinous surfaces. 19. Composition according to one of the preceding claims, characterized in that the composition is a composition for the treatment of textile fibers. 20. Composition according to one of the preceding claims, characterized in that the composition is a detergent composition. 21. Use of an oil-in-water emulsion comprising: - an oil (1) consisting of at least one polyorganosiloxane oil free of hydrophilic group and whose dynamic viscosity is at least 5 Pa. S; an oil (2) immiscible with water and miscible or dispersible in the oil (1) possibly by means of an additional compound (3) chosen from: (i) at least one oil and / or one resin and / or a polyorganosiloxane gum having at least one hydrophilic group, and / or (ii) at least one vegetable or animal oil, or derivatives thereof; at least one nonionic, ionic surfactant, at least one nonionic, ionic amphiphilic copolymer, alone or in combination; the dynamic viscosity of the mixture of the oil (1), the oil (2) and, if appropriate, the additional compound (3) being at least 5 Pa.s; <Desc / Clms Page number 31>  said emulsion being prepared before it is introduced into the composition, by emulsification of a mixture of the oil (1), the oil (2) and, if appropriate, of the additional compound (3), in aqueous cosmetic formulations for the treatment of keratin surfaces, intended to be rinsed. 22. Use of an oil-in-water emulsion comprising: - an oil (1) consisting of at least one polyorganosiloxane oil free of hydrophilic group and whose dynamic viscosity is at least 5 Pa. S; an oil (2) immiscible with water and miscible or dispersible in the oil (1) possibly by means of an additional compound (3) chosen from: (i) at least one oil and / or one resin and / or a polyorganosiloxane gum having at least one hydrophilic group, and / or (ii) at least one vegetable or animal oil, or derivatives thereof; at least one nonionic, ionic surfactant, at least one nonionic, ionic amphiphilic copolymer, alone or in combination; the dynamic viscosity of the mixture of the oil (1), the oil (2) and, if appropriate, the additional compound (3) being at least 5 Pa.s; said emulsion being prepared before it is introduced into the composition, by emulsification of a mixture of the oil (1), the oil (2) and, if appropriate, of the additional compound (3), in compositions for the treatment textile fibers for rinsing. 23. Use of an oil-in-water emulsion comprising: - an oil (1) consisting of at least one polyorganosiloxane oil free of hydrophilic group and whose dynamic viscosity is at least 5 Pa. S; an oil (2) immiscible with water and miscible or dispersible in the oil (1) possibly by means of an additional compound (3) chosen from: (i) at least one oil and / or one resin and / or a polyorganosiloxane gum having at least one hydrophilic group, and / or (ii) at least one vegetable or animal oil, or derivatives thereof; at least one nonionic, ionic surfactant, at least one nonionic, ionic amphiphilic copolymer, alone or in combination; the dynamic viscosity of the mixture of the oil (1), the oil (2) and, if appropriate, the additional compound (3) being at least 5 Pa.s; <Desc / Clms Page number 32>  said emulsion being prepared before it is introduced into the composition, by emulsification of a mixture of the oil (1), the oil (2) and, if appropriate, of the additional compound (3), in detergent compositions intended for to be rinsed.