WO2007007294A2 - Film of cosmetic product - Google Patents

Abstract

The present invention relates to a cosmetic process for making up and/or caring for keratin material(s), comprising the application, on contact with a keratin material, of at least one cosmetic composition comprising at least one water-soluble polymer and which is in the form of an anhydrous film, said application being made under conditions suitable for dissolution of said polymer and in which said cosmetic composition consists of at least 50% by weight of compound(s) approved for food use relative to its total weight, and is formed from at least one layer composed of a matrix based on said water-soluble polymer, with the proviso that when said composition is formed from a single layer comprising hydroxypropylmethylcellulose as sole water-soluble polymer, said composition does not also contain either 28.5% by weight of glycerol in combination with 2.85% by weight of disodium salt of fuschin, or 21% by weight of glycerol in combination with 7% by weight of a mixture of titanium dioxide and brown iron oxide.

Description

Film of cosmetic product

The present invention relates to a cosmetic process for making up and/or caring for keratin materials, especially the skin and the lips, comprising the application to said keratin material of a film of cosmetic product. The cosmetic compositions toward which the present invention is directed are more particularly makeup and/or care products intended to be applied to the skin, the lips and/or the integuments.

In general, cosmetic compositions contain an appreciable amount of synthetic products, especially formulation additives to give them specific properties such as satisfactory stability over time and/or with regard to significant variations in temperature, satisfactory behavior especially in terms of makeup qualities, and good applicability.

Now, in the cosmetics field where the turnover of products is extremely rapid, there is a constant need for novel formulation routes for obtaining a level of performance at least equal to that offered by the current products, or, in certain respects, even better. What is more, the choice of raw materials used for the implementation of these novel formulation routes must be guided, as it has always been, by an ever-increasing concern to offer the maximum guarantee, both for the consumers for whom the cosmetic formulations that incorporate them are intended, and for preservation of the integrity of the environment. The inventors have observed, unexpectedly, that it is possible to obtain, by using compound(s) approved for food use, a cosmetic composition in the form of an anhydrous film that has cosmetic makeup and/or care qualities on keratin material(s) at least equivalent to, or even better than, those of the prior art compositions.

More specifically, the present invention relates to a cosmetic process for making up and/or caring for keratin material(s), comprising the application, on contact with a keratin material, of at least one cosmetic composition comprising at least one water- soluble polymer and which is in the form of an anhydrous film, the application being made under conditions suitable for dissolution of said polymer and in which said cosmetic composition consists of at least 50% by weight of compound(s) approved for food use relative to its total weight, and is formed from at least one layer composed of a matrix based on said water-soluble polymer, with the proviso that when said composition is formed from a single layer comprising hydroxypropylmethylcellulose as sole water-soluble polymer, said composition does not also contain either 28.5% by weight of glycerol in combination with 2.85% by weight of disodium salt of fuschin, or 21% by weight of glycerol in combination with 7% by weight of a mixture of titanium dioxide and brown iron oxide. According to one specific aspect of the invention, the compounds approved for food use may be "food grade compounds".

In particular, the process of the invention may be a make up process.

According to another of its aspects, the present invention relates to a cosmetic care and/or makeup composition in the form of an anhydrous film and comprising at least 50% by weight of compound(s) approved for food use relative to its total weight, including at least particles with a color and/or optical effect, having a multilayer structure and consisting exclusively of compounds referenced in the Codex alimentarius and/or at least

1% by weight of particles with a color and/or optical effect consisting of at least one organic material with a color and/or optical effect adsorbed onto a water-insoluble mineral substrate, said film being formed from at least one layer composed of a matrix based on at least one water-soluble polymer, with the proviso that when said film is formed from a single layer comprising hydroxypropylmethylcellulose as sole water-soluble polymer, it does not also contain either 28.5% by weight of glycerol in combination with 2.85% by weight of disodium salt of fuschin, or 21% by weight of glycerol in combination with 7% by weight of a mixture of titanium dioxide and brown iron oxide.

In general, the compositions according to the invention are composed of a physiologically acceptable medium.

The term "cosmetic composition" denotes a composition as defined in the Directive 93/35/CEE of the Council of 14 June 1993. The term "physiologically acceptable medium" denotes a nontoxic medium that can be applied to at least one human keratin material.

The term "keratin materials" is intended to cover the skin, mucous membranes, for instance the lips, the nails and keratin fibers, such as the eyelashes and the hair. The cosmetic compositions in accordance with the present invention are particularly advantageous for use on the skin and the lips.

More generally, according to the invention, the term "compounds approved for food use" means compounds chosen from ozokerite, rice wax, compounds referenced in the Codex alimentarius and materials consisting exclusively of compounds referenced in the Codex alimentarius, for example such as pearls.

The Codex Alimentarius, or Food Code, is the world reference acting as the authority for consumers, producers and processors of foodstuffs, national food control bodies and the international food products market.

It combines the food standards, guidelines and other codes of use established in the field of food products by the Commission of the Codex Alimentarius, created in 1963 by the Food and Agriculture Organization (FAO) and the World Health Organization

(WHO), in the context of the FAOAVHO joint program on food standards and under the aegis of the UN.

For the purposes of the invention, a compound referenced in the Codex alimentarius denotes a compound whose use as a food ingredient is considered in the Codex, and is or is not regulated therein according to specific terms.

It is understood that when terms are specified in the Codex alimentarius for certain ingredients, they are not decisive for the implementation of these same compounds in the compositions according to the invention.

In general, the term "food" ingredient denotes any substance other than water, used in the manufacture or preparation of a food and present in the finished product even though occasionally in a modified form. Thus, the term "food ingredient" especially includes food additives and food extracts.

Moreover, the term "food additive" means any substance that is not normally consumed as a foodstuff per se and is not normally used as a characteristic ingredient of a food, whether or not it has nutrient value, and whose deliberate addition to the foodstuff for a technological or organoleptic purpose, at any step in the manufacture, transformation, preparation, processing, packaging, wrapping, transportation or storage of this foodstuff, leads or may lead (directly or indirectly) to its incorporation or to the incorporation of derivatives thereof into the foodstuff or can affect in any other way the characteristics of this foodstuff.

For the purposes of the invention, a "product consisting exclusively of compounds referenced in the Codex alimentarius" denotes a material whose composition consists exclusively of compounds referenced in the Codex alimentarius and which, consequently, comprises at least two compounds, or even more, referenced in the Codex alimentarius. Materials of multilayer structure, for instance pearls, are especially covered under this definition. Thus, pearls generally consist of a mineral substrate such as mica or TiO₂ covered, for example, with a coat of iron oxide.

The Codex alimentarius under consideration according to the invention is that available at the date of filing of the present patent application.

For example, as regards the additives, it is the Codex Food Additive and Contaminants CX/FAC 05/37/6.

As regards extracts, these are especially defined in the Codex alimentarius volume 8 and more particularly in the Codex standards 19, 33 and 210. For plant oils, the Codex under consideration is the version of the Codex standard 210 as amended in 2003.

As regards edible fats and oils, the Codex under consideration is the version of the Codex standard 19-1981, as revised in February 1993. For example, for olive oil, reference may be made more particularly to the version of the Codex standard 33, revised in 1989.

According to one embodiment, the "compounds approved for food use" according to the present invention are "food grade compounds".

According to this embodiment, a "food grade compound" may be a "compound approved for food use" that is sold as food grade compounds, i.e. a compound for which the supplier states it can be used in a food product. For example, a food grade compound is a compound specifically made to match the needs of the food industry. A food grade compound can consist only of edible products.

According to the invention, a "food grade compound" can also refers to a compound, specifications of which are given in the US Code of Federal Regulation Title 21 Chap I Parts 73, 74, 82, 172, 184 and 854.

In the US Code of Federal Regulation Title 21 Chap I, each chemical compound is defined as a "food grade compound" by a specification comprising i) a chemical name, ii) impurity levels the compound can contain, and/or iii) the concentration at which it can be used in a food. In one embodiment of the invention, the food grade compound will be used in the cosmetic composition with the specifications given in US Code of Federal Regulation Title 21 Chap I. As regards food grade oils, the part under consideration is 854.

As regards food grade semi-solid and solid fats like for example waxes, the part under consideration is 184.

As regards food grade additives, and more particularly food grade dyestuffs, the parts under consideration are 172, 73, 74 and 82.

More preferentially, the compositions in accordance with the invention comprise at least 55% by weight, especially at least 60% by weight, in particular at least 65% by weight, especially at least 70% by weight, in particular at least 75% by weight, in particular at least 80% by weight, in particular at least 85% by weight, in particular at least 90% by weight, especially at least 95% by weight and more particularly consist of about 100% by weight of compound(s) approved for food use relative to their total weight.

In one embodiment, the compositions in accordance with the invention comprise at least 50% by weight, in particular at least 60% by weight, especially at least

70% by weight, especially at least 80% by weight, especially at least 90% by weight, and more particularly consist of about 100% by weight, relative to their total weight, of food grade compound(s).

FILM

The anhydrous film used in the context of the present invention is advantageously solid and manipulable. Its consistency is flexible, to the point that it takes the shape and curvature of the area of keratin material for which it is intended.

The term "anhydrous" means a support whose water content is less than 10%, especially less than 5% and in particular less than 3%, and more particularly not containing water. The term "flexible" should be understood as meaning that the film can be compressed or bent without breaking, being capable of adapting to the reliefs of the human body. A flexible film made in the form of a fibrous lap may, in certain implementation examples, be folded on itself at least once without breaking into two pieces.

The film may form a cushion, a mask or patch, a headcap, a fingerstall or glove, a lap to be cut into size or a wipe, a disk, an oval or a rectangle, inter alia.

The film may have a dry feel before use.

The film may have a flattened general shape. In one particular embodiment, the film in accordance with the invention may be in the form of a square, a rectangle or a disk about ten centimeters long, which the user can cut into shape as a function of the shape and sizes of the area and as a function of the desired result. According to one implementation variant, when the film is intended to be applied to the lips, it may be cut beforehand to the shape and average size of the lips such that it can be applied directly by the user, to each of the lips. For reasons of convenience and hygiene, this option is generally preferred, especially for application to the lips. The cut film may be in the shape of only one lip. The cut film may also be in the shape of two lips joined at their ends, such that the user, by pinching the lips together, makes up both lips at the same time.

The user can fold the support in two before pinching it between the two lips. The cosmetic composition may also be in the form of a solid film ranging from 10 to 1000 μm in thickness. According to one particular embodiment, this film ranges from 20 to 500 μm, in particular from 50 to 250 μm and more particularly from 50 to 200 μm in thickness.

The composition used in the present invention is in the form of an anhydrous film comprising at least one water-soluble polymer, said polymer being to dissolve on contact of the composition with water.

For the purposes of the present invention, the term "conditions favorable for its dissolution" is intended to denote conditions under which the film constituting the composition according to the invention is combined with an amount of water sufficient to dissolve the water-soluble polymer(s) it contains. The dissolution may be performed with water, used in pure form or present in an aqueous solvent, for example the water contained in saliva. The placing in contact with water may be performed according to several alternatives.

In one embodiment of the invention, the composition may be placed in contact with water prior to its contact with the keratin material. The water-soluble polymer is then dissolved prior to its application to the keratin material under consideration. Thus, the dissolution of the polymer with a solvent may take place away from the keratin materials onto which the film that it constitutes is intended to be applied. In another embodiment, the dissolution may be performed by placing the composition according to the invention in contact with a moistened keratin material.

Thus, the placing of the composition in contact with water may be performed in situ, on keratin materials, for example the lips or the skin, that have been moistened prior to contact with the composition.

Also, the composition may be placed in contact with the keratin materials, for example the skin or the hair, before the dissolution of the water-soluble polymer. Thus, the keratin material is moistened following its contact with the composition.

This may make it possible, for example, according to the amount of water added, to modify the properties as a function of the desired result.

According to another variant, the composition according to the invention is applied to the lips and the dissolution is performed by the water contained in saliva.

The polymer of which the film is composed may advantageously be dissolved with water, especially with water at a temperature below 20°C. However, the invention does not exclude water or another solvent with a temperature above 20°C from being used to rehydrate the film.

By virtue of the natural affinity for water, or an aqueous solvent, of the material constituting it, the film according to the invention can readily dissolve on contact with water, or with the solvent. This dissolution may especially be performed together with the aid, where appropriate, of manual stirring and/or friction of the film, advantageously over a period typically of less than 5 minutes, preferably of less than 1 minute and preferably of less than 30 seconds.

Thus, in the case of a cosmetic composition intended to be applied to the lips, this dissolution may advantageously be performed by the action of saliva, and, where appropriate, rubbing the lips together or pressing with a finger.

According to the amount of water combined with the film for the dissolution of the water-soluble polymer(s) constituting it, the apparent viscosity of the composition obtained may be readily adjusted.

The film may be substantially unshrinkable once moistened. The film may be formed from at least one layer whose matrix consists of at least one water-soluble polymer, in which may be included at least one coloring agent and/or one fatty phase, especially as defined below. According to another embodiment, the film may be composed of only one support layer containing at least one water-soluble polymer.

The film may comprise, or even may consist essentially of, soluble fibers, which are preferably soluble in water below 20°C. The film may thus comprise, for example, more than 95% by mass, or even more than 99% or more of water-soluble fibers.

Preferably, the fibers are made with polyvinyl alcohol (PVA) according to a process that gives them the desired solubility.

Fibers that are soluble in water at a temperature below 20°C are sold by the Japanese company Kuraray under the trade name Kuralon K-II WN2. The process for manufacturing these fibers comprises the use of organic solvents. The cross section of these fibers may be substantially circular.

Document EP 0 636 716, the content of which is incorporated into the present patent by reference, describes PVA-based water-soluble fibers and the process for manufacturing them.

The invention is not limited to the use of PVA, and fibers made of other water- soluble materials may be used provided that they dissolve in water having the desired temperature, for example polysaccharide fibers sold under the name Lysorb by the company Lysac Technologies, Inc. or fibers based on polyholoside polymers, for instance glucomannan or starch.

The film may comprise, where appropriate, a mixture of fibers that are soluble in water at various temperatures.

The fibers may be composites and may comprise, for example, a core and a sheath not having the same nature, for example formed from different grades of PVA. Such a film may be more particularly suitable for making up and/or caring for the lips.

The water-soluble polymers used in the film may be of synthetic or natural origin, where appropriate modified by chemical reactions. They may be film- forming.

As illustrations of water-soluble polymers that may be used, mention may be made especially of the following polymers:

(1) those resulting from the copolymerization of a monomer derived from a vinyl compound bearing a carboxylic group such as, more particularly, acrylic acid, methacrylic acid, maleic acid, α-chloroacrylic acid, and a basic monomer derived from a substituted vinyl compound containing at least one basic atom, such as, more particularly, dialkylaminoalkyl methacrylate and acrylate, dialkylaminoalkylmethacrylamide and acrylamide. Such compounds are described in patent US 3 836 537; (2) polymers comprising units derived from: a) at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen with an alkyl radical, b) at least one acidic comonomer containing one or more reactive carboxylic groups, and c) at least one basic comonomer such as esters containing primary, secondary, tertiary and quaternary amine substituents of acrylic and methacrylic acids and the product of quaternization of dimethylaminoethyl methacrylate with dimethyl or diethyl sulfate;

(3) crosslinked alkylpolyaminoamides totally or partially derived from polyaminoamides;

(4) polymers comprising zwitterionic units;

(5) polymers derived from the N-carboxyalkylation of chitosan, such as N-carboxymethylchitosan or N-carboxybutylchitosan sold under the name "Evalsan" by the company Jan Dekker; and (6) (Ci-C₅)alkyl vinyl ether/maleic anhydride copolymers, partially modified by a semi-amidation with an N,N-dialkylaminoalkylamine, such as N,N-dimethylamino- propylamine or by a semi-esterification with an N,N-dialkanolamine. These copolymers may also comprise other vinyl comonomers, such as vinylcaprolactam.

As other water-soluble polymers that may be used, mention may also be made of :

- proteins (or polymers of protein type) such as wheat or soybean proteins; keratin, for example keratin hydrolyzates and sulfonic keratins; casein; albumin; collagen; glutelin; glucagon ; gluten; zein; gelatins, and derivatives thereof;

- chitin- or chitosan-based polymers such as anionic, cationic, amphoteric or nonionic chitin or chitosan polymers;

- polymers of polysaccharide type such as, especially: - cellulose-based polymers, especially such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, methylcellulose, methylethyl- cellulose, ethylhydroxyethylcellulose, carboxymethylcellulose and quaternized cellulose derivatives, and mixtures thereof; and - starches and derivatives thereof;

- acrylic polymers or copolymers such as polyacrylates or polymethacrylates;

- vinyl polymers such as polyvinylpyrrolidones, copolymers of methyl vinyl ether and of maleic anhydride, the copolymer of vinyl acetate and of crotonic acid, and copolymers of vinylpyrrolidone and of vinyl acetate; - copolymers of vinylpyrrolidone and of caprolactam; polyvinyl alcohols;

- optionally modified polymers of natural origin, such as: i. gum arabic, guar gum, xanthan derivatives and karaya gum; ii. alginates, carrageenans, ulvans and other algal colloids; iii. glycoaminoglycans and hyaluronic acid and its derivatives; iv. shellac, sandarac gum, dammar resins, elemi gums and copal resins; v. deoxyribonucleic acid; vi. mucopolysaccharides such as hyaluronic acid and chondroitin sulfate, and mixtures thereof.

Mention may also be made of caprolactams, pullulan, pectin, mannan, galactomannans and glucomannans, and derivatives thereof.

Needless to say, the film may comprise a mixture of such polymers. In particular, the water-soluble polymer may be chosen from polymers of protein type; chitin- or chitosan-based polymers; polysaccharide polymers; acrylic polymers or copolymers; vinyl polymers; copolymers of vinylpyrrolidone and of caprolactam, and mixtures thereof.

Advantageously, the water-soluble polymers used in a film according to the invention may be chosen from polymers approved for food use, and especially those registered in the Codex alimentarius.

Such polymers may be, for example, and in a nonlimiting manner, celluloses such as hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxethylcellulose or carboxymethylcellulose; polyvinylpyrrolidone; optionally modified polymers of natural origin such as gum arabic, guar gum, xanthan derivatives, karaya gum, alginates and dammar resins, and mixtures thereof.

The water-soluble polymer may be present, for example, in a proportion of from 5% to 99.99% by weight, in particular from 10% to 95% by weight, and more particularly from 20% to 90% by weight relative to the total weight of the composition.

In one implementation example of the invention, the film may comprise at least one layer of a nonwoven consisting essentially of fibers that are water-soluble, preferably at a temperature below 20°C. To manufacture the film when it comprises a nonwoven, any suitable techniques for making a nonwoven from fibers may be used.

For example, the fibers may be formed by extrusion and deposited on a conveyor to form a lap of fibers, which is then consolidated via a standard fiber bonding technique, for instance needle bonding, hot-bonding, calendaring or air-through bonding, in which technique the lap passes through a tunnel in which hot air is blown. The latter technique is advantageously used when the lap consists of two-component fibers, for example of fibers comprising at least two grades of polyvinyl alcohol (PVA), the melting points or softening points of which are different, these fibers being, for example, co- extruded such that the fiber consists of at least one first grade located at the core of the fiber and of at least one second grade located at the periphery of the fiber, in the form of a sheath. This may facilitate the bonding of the fibers when the sheath has a melting point lower than that of the core.

The lap of fibers used to make the nonwoven may also be formed by carding fibers chopped to a length of 10 to 50 mm, followed by deposition of the fibers on a conveyor where the lap may then be consolidated via a bonding technique as described above.

The density of the film may depend on the uses. The film may or may not have, for example, a density of less than or equal to 0.1 g/cm³. A density of less than or equal to 0.1 g/cm³, better still between 0.01 g/cm³ and 0.1 g/cm³, may make it very airy and facilitate its dissolution in water. In one embodiment, the film may comprise at least two layers of nonwoven each consisting essentially of fibers that are soluble in water, preferably at a temperature below 20°C.

The film may comprise at least one support layer consisting essentially of fibers that are soluble in a solvent, especially of aqueous type, for example at a temperature below 20°C, and at least one layer of a support that is insoluble in this same solvent.

The water- insoluble support layer may allow easy application of the film to the lips. The water-insoluble support may be flexible.

The water-insoluble support may be made of a material chosen from polyurethanes, thermoplastic elastomers of the styrene-butadiene-styrene, styrene- ethylene-butadiene-styrene, ethylene-vinyl acetate or ester coether type, polyethylenes, polypropylenes or silicones. Such supports are sold especially under the brand names: Baydur^®, Daltoflex^®,

Uroflex^®, Hyperlast^®, Inspire^®, Desmopan^®, Estane^®, Lastane^®, Texin^®, Cariflex^®, Kraton^®, Solprene^®, Elvax^®, Escorene^®, Optene^®, Arnitel^®, Hytrel^® or Riteflex^®.

The water-insoluble support may also be, for example, a sheet of a synthetic nonwoven, for example a nonwoven of polyethylene, polypropylene, polyethylene terephthalate (PET), polylactic acid, polyamide, viscose or cellulose fibers, or of a mixture of these fibers, or a film which may or may not be permeable. Nonwovens are described in general in Riedel's "Nonwoven Bonding Methods & Materials", Nonwoven World (1987), which is incorporated herein by reference.

Alternatively, the support may be in the form of a nonwoven, especially made of cellulose, viscose, cotton or synthetic fibers.

The nature and form of the support will be chosen in an appropriate manner as a function of the nature of the surface to be treated so as to allow it advantageously to be massed onto the surface to be treated without any risk to said surface and with maximum comfort. The thickness of the support ranges in particular from 0.01 mm to 2 mm and more particularly from 0.02 to 0.2 mm. Advantageously, the cosmetic composition according to the invention may be composed solely of a film as described above and may be free of a water-insoluble support layer and in particular free of a water-insoluble flexible support.

The film may be free of adhesive, especially of pressure-sensitive adhesive.

DYESTUFFS

According to one of its embodiments, the composition used in accordance with the present invention may comprise at least one dyestuff.

The dyestuff(s) is (are) chosen from the dyestuffs conventionally used in cosmetic compositions, and may especially be of the type such as pigments or pearls.

The term "pigments" should be understood as meaning white or colored, mineral or organic particles, which are insoluble in an aqueous solution and which are intended to color and/or opacify the corresponding cosmetic composition.

As mineral pigments that may be used in the invention, mention may be made of zirconium oxide or cerium oxide and also zinc oxide or chromium oxide, ferric blue, manganese violet, ultramarine blue and chromium hydrate.

The term "pearls" should be understood as meaning colored particles of two- layer or multilayer structure, of any form, which may or may not be iridescent, produced especially by certain mollusks in their shell or else synthesized, and which have a color effect by optical interference.

These dyestuffs may be present in a proportion of from 0.005% to 20% by weight, especially from 0.01% to 10% by weight and in particular from 0.05% to 5% by weight, or even from 0.1% to 2.5% by weight, relative to the total weight of the cosmetic composition. Advantageously, the compositions according to the invention may comprise at least one dyestuff approved for food use, especially referenced in the Codex alimentarius, and more specifically the substances referenced in table 1 thereof.

In particular, the dyestuffs may be dyestuffs containing at least two materials, said dyestuff being referenced in the Codex alimentarius or consisting exclusively of materials referenced in the Codex alimentarius.

More specifically, it may be at least one dyestuff chosen from pearls consisting of materials referenced in the Codex alimentarius, lakes approved for food use, and also referenced in the Codex alimentarius, and coloring substances approved by the Codex alimentarius, and mixtures thereof.

Illustrations of these dyestuffs that may be mentioned more particularly include mineral pigments such as titanium oxides and iron oxides, water-soluble or liposoluble coloring agents, for instance Sudan red, β-carotene, beetroot juice, the disodium salt of ponceau, the disodium salt of alizarine green, quinoline yellow, DC Red No. 7, DC Green No. 6, DC Yellow No. 11, DC Violet No. 2, DC Orange No. 5, the trisodium salt of amaranth, the disodium salt of tartrazine, the monosodium salt of rhodamine, the disodium salt of fuchsin, xanthophyll, canthaxanthine, carmines, erythrosin, indigotin and riboflavin. In the case of the present invention, the choice of pearls consisting of materials referenced in the Codex alimentarius is preferred.

Illustrations of such pearls that may be mentioned more particularly include pearls based on mica coated with titanium and/or with iron oxide, pearls based on mica coated with titanium and/or with iron oxide and surface-coated with at least one organic dye, for instance carbon black, and pearls based on mica coated with aluminum, silver and/or gold and, where appropriate, surface-coated with at least one organic dye.

Advantageously, the base material and the abovementioned surface coatings are materials approved for food use. For example, TiO₂ is authorized under the reference E171, iron oxide under the reference E172, carbon black under the reference E153, aluminum under the reference E 174, and gold under the reference E 175.

Such composite materials are especially sold by the company Merck under the name Candurin^®.

The lakes may be particles consisting of at least one organic material with a color and/or optical effect adsorbed onto a water-insoluble mineral substrate. As regards lakes, mention may be made more particularly of carbon black, pigments of the type such as organic barium, strontium, calcium, aluminum or titanium lakes, including those submitted for certification by the Food and Drug Administration (FDA) (for example FD & C), lakes based on cochineal carmine, or the diketopyrrolopyrroles (DPP) described in documents EP-A-542 669, EP-A-787 730, EP-A-787 731 and WO-A-96/08537.

As pigments of "lake" type that are most particularly suitable for the invention, mention may be made especially of those sold by LCW Sensient under the names FD&C Yellow No. 5/E102, FD&C Yellow No. 6/E110, FD&C Blue No. 1/E132, FD&C Red No. 40/El 29, FD&C Blue No. 2 Aluminum Lake, FD&C Yellow No. 5 Aluminum Lake, FD&C Yellow No. 6 Aluminum Lake, FD&C Blue No. 1 Aluminum Lake, FD&C Red No. 40 Aluminum Lake and FD&C Green No. 3 Aluminum Lake. FD&C Blue No. 1 Aluminum Lake, FD&C Green No. 3 Aluminum Lake,

FD&C Yellow No. 5 Aluminum Lake, FD&C Yellow No. 6 Aluminum Lake and FD&C Red No. 40 Aluminum Lake are most particularly advantageous.

As regards the lakes and pearls, these dyestuffs are especially advantageous for affording an effect other than a simple conventional shade effect, i.e. a unified and stabilized effect as produced by standard dyestuffs, for instance monochromatic pigments.

For the purposes of the present invention, the term "stabilized" means free of a color variability effect according to the angle of observation. The effect obtained with the pearls and/or lakes may be an effect chosen from metallic effects, and especially a mirror, soft-focus and/or rainbow effect. Besides the abovementioned coloring agents such as those specifically approved for food use, the compositions may obviously comprise other organic or inorganic coloring substances.

They may thus be organic pigments. Mention may especially be made of those known under the following names: D&C Blue No. 4, D&C Brown No. 1, D&C Green No. 5, D&C Green No. 6, D&C Orange No. 4, D&C Orange No. 5, D&C Orange No. 10, D&C Orange No. 11, D&C Red No. 6, D&C Red No. 7, D&C Red No. 17, D&C Red No. 21, D&C Red No. 22, D&C Red No. 27, D&C Red No. 28, D&C Red No. 30, D&C Red No. 31, D&C Red No. 33, D&C Red No. 34, D&C Red No. 36, D&C Violet No. 2, D&C Yellow No. 7, D&C Yellow No. 8, D&C Yellow No. 10, D&C Yellow No. 11. The organic dyestuff may comprise an organic lake supported on an organic support such as colophony or aluminum benzoate, for example.

Among the organic lakes that may be mentioned in particular are those known under the following names: D&C Red No. 2 Aluminum Lake, D&C Red No. 3 Aluminum Lake, D&C Red No. 4 Aluminum Lake, D&C Red No. 6 Aluminum Lake, D&C Red No. 6 Barium Lake, D&C Red No. 6 Barium/Strontium Lake, D&C Red No. 6 Strontium Lake, D&C Red No. 6 Potassium Lake, D&C Red No. 7 Aluminum Lake, D&C Red No. 7 Barium Lake, D&C Red No. 7 Calcium Lake, D&C Red No. 7 Calcium/Strontium Lake, D&C Red No. 7 Zirconium Lake, D&C Red No. 8 Sodium Lake, D&C Red No. 9 Aluminum Lake, D&C Red No. 9 Barium Lake, D&C Red No. 9 Barium/Strontium Lake, D&C Red No. 9 Zirconium Lake, D&C Red No. 10 Sodium Lake, D&C Red No. 19 Aluminum Lake, D&C Red No. 19 Barium Lake, D&C Red No. 19 Zirconium Lake, D&C Red No. 21 Aluminum Lake, D&C Red No. 21 Zirconium Lake, D&C Red No. 22 Aluminum Lake, D&C Red No. 27 Aluminum Lake, D&C Red No. 27 Aluminum/Titanium/Zirconium Lake, D&C Red No. 27 Barium Lake, D&C Red No. 27 Calcium Lake, D&C Red No. 27 Zirconium Lake, D&C Red No. 28 Aluminum Lake, D&C Red No. 30 Lake, D&C Red No. 31 Calcium Lake, D&C Red No. 33 Aluminum Lake, D&C Red No. 34 Calcium Lake, D&C Red No. 36 Lake, D&C Red No. 40 Aluminum Lake, D&C Blue No. 1 Aluminum Lake, D&C Green No. 3 Aluminum Lake, D&C Orange No. 4 Aluminum Lake, D&C Orange No. 5 Aluminum Lake, D&C Orange No. 5 Zirconium Lake, D&C Orange No. 10 Aluminum Lake, D&C Orange No. 17 Barium Lake, D&C Yellow No. 5 Aluminum Lake, D&C Yellow No. 5 Zirconium Lake, D&C Yellow No. 6 Aluminum Lake, D&C Yellow No. 7 Zirconium Lake, D&C Yellow No. 10 Aluminum Lake.

The compositions according to the invention may also contain diffracting agents, goniochromatic agents and/or reflective particles.

According to a one embodiment, the compositions according to the instant invention contain dyestuff considered as being food grade compound as defined before in the application.

More particularly dyestuff can be chosen from dyestuff having the specifications given in the US Code of Federal Regulation Title 21 Chap I parts 73, 74 and 82. According to a one embodiment, the dyestuff will in particular be made of at least 50% by weight, more particularly at least 75% by weight, especially 90% by weight of the total weight, of "food grade compounds" as defined before in the application.

According to a specific embodiment, these compositions may be free of non food grade dyestuff.

FATTY PHASE

The cosmetic compositions in accordance with the present invention may comprise a fatty phase especially comprising at least one compound chosen from oils and fatty substances that are solid at room temperature (20 - 25°C) and atmospheric pressure, for example such as waxes and pasty iatty substances, and mixtures thereof.

Oils and solid fatty substances and mixtures thereof in a form suitable for human consumption, whether or not they have been subjected to conversions such as transesterification, hydrogenation or fractionation, are thus most particularly suitable for the invention.

Oils and solid fatty substances are especially foodstuffs in accordance with the definition in section 1 of the Codex alimentarius and composed of fatty acid glycerides. According to one embodiment of the instant invention, the oils and solid fatty substances are food grade compounds.

They are more particularly listed in the US Code of Federal Regulation Title 21 Chap I Parts 172, 184 and 854.

They may be of animal, plant, mineral, synthetic or marine origin. They may contain a small amount of other lipids, for instance phosphatides, unsaponifiable constituents and free fatty acids naturally present in these solid fatty substances and oils.

a) Oil The term "oil" means any fatty substance that is in liquid form at room temperature (20 - 25°C) and atmospheric pressure. The liquid fatty phase may also contain, besides oils, other compounds dissolved in the oils, such as gelling and/or structuring agents, such as those conventionally used in the field.

The cosmetic composition according to the present invention may comprise at least one and in particular at least two oils.

The oils that are suitable for the preparation of the cosmetic compositions according to the invention may be volatile or nonvolatile oils.

For the purposes of the present invention, the term "volatile oil" means an oil

(or nonaqueous medium) capable of evaporating on contact with the skin in less than one hour, at room temperature and atmospheric pressure. The volatile oil is a volatile cosmetic oil, which is liquid at room temperature, especially having a nonzero vapor pressure, at room temperature and atmospheric pressure, in particular having a vapor pressure ranging from 0.13 Pa to 40 000 Pa (10^~3 to 300 mmHg), preferably ranging from 1.3 Pa to 13 000 Pa (0.01 to lOO mmHg) and preferably ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg).

For the purposes of the present invention, the term "nonvolatile oil" means an oil having a vapor pressure of less than 0.13 Pa.

The volatile or nonvolatile oils may be hydrocarbon-based oils especially of animal, mineral or plant origin, synthetic oils, silicone oils or fluoro oils, or mixtures thereof.

For the purposes of the present invention, the term "hydrocarbon-based oil" means an oil mainly containing hydrogen and carbon atoms and possibly oxygen, nitrogen, sulfur and/or phosphorus atoms.

The oils that are more particularly considered according to the invention are hydrocarbon-based oils and more preferentially edible oils especially referenced in the Codex alimentarius and more specifically in standards 19 to 27, 33, 34, 123 to 128 and 210 thereof.

As examples of oils that are suitable for use in the present invention, mention may be made of oils chosen from oils comprising at least one fatty acid chosen from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, arachidic acid, gadoleic acid, behenic acid, erucic acid, brassidic acid, cetoleic acid, lignoceric acid and nervonic acid, and a mixture thereof.

They are more particularly hydrocarbon-based plant oils and in particular those chosen from triglycerides consisting of fatty acid esters of glycerol, the fatty acids of which may have chain lengths ranging from C₄ to C₂₄, these chains possibly being linear or branched, and saturated or unsaturated. These oils are especially heptanoic or octanoic triglycerides, groundnut oil, babassu oil, coconut oil, grapeseed oil, cottonseed oil, corn oil, corn germ oil, mustard seed oil, palm oil, rapeseed oil, sesame seed oil, soybean oil, sunflower oil, wheatgerm oil, canola oil, apricot oil, mango oil, castor oil, shea oil, avocado oil, olive oil, sweet almond oil, peach kernel oil, walnut oil, hazelnut oil, macadamia oil, jojoba oil, alfalfa oil, poppy seed oil, pumpkin oil, marrow oil, blackcurrant oil, evening primrose oil, millet oil, barley oil, quinoa oil, rye oil, safflower oil, candlenut oil, passionflower oil, musk rose oil or shea butter oil, or alternatively caprylic/capric acid triglycerides, and mixtures thereof.

According to one embodiment, the compositions according to the instant invention will contain at least some canola oil, in particular when they are intended to confer a gloss effect. For comfort reasons, the compositions according to the invention will contain reduced amounts of castor oil. In effect, the castor oil is inclined to be partially oxidized by air with time and thus may generate unpleasant smell. Accordingly, the compositions may preferably contain less than 5% by weight of castor oil, especially less than 2%, in particular less than 1% by weight relative to the total weight of the composition and more particularly are free of castor oil.

According to one particular embodiment, the cosmetic compositions in accordance with the invention may comprise at least one oil chosen from hydrocarbon- based plant oils and more particularly chosen from the following oils approved for food use: isopropyl myristate sold by Stearinerie Dubois, the caprylic/capric acid triglycerides sold by Stepan; hybrid rapeseed oil, liquid cottonseed oil, refined protected deodorized mango oil, the liquid fraction of protected shea butter and the refined canola seed oil sold by Karlshamns; Lipex Sheasoft and cottonseed oil sold by Karlshamns; the deodorized apricot kernel oil sold by Nestle; the sweet almond oil sold by Soetenaey; the peach kernel oil sold by Aarhus United; rapeseed oil, corn germ oil, olive oil, grapeseed oil, soybean oil and sunflower oil sold by Huileries de Lapalisse and walnut oil sold by Soetenaey.

More preferably, these oil compounds are food grade compounds, as defined here-above.

According to one particular embodiment, the cosmetic composition in accordance with the present invention comprises at least one oil chosen from canola oil, caprylic/capric acid triglycerides, apricot oil, peach oil, walnut oil and olive oil.

According to one particular embodiment, the cosmetic compositions according to the invention comprise from 0.1% to 99% by weight, especially from 1% to 90% by weight, in particular from 5% to 70% by weight, in particular from 10% to 65% by weight and more particularly from 20% to 60% by weight, relative to the total weight of oil(s) approved for food use in the composition and more particularly referenced in the Codex alimentarius.

Besides the abovementioned oils, the compositions in accordance with the present invention may obviously comprise at least one other liquid fatty substance, with the proviso that it is present in amounts in accordance with the requirements according to the invention.

Nonvolatile hydrocarbon-based oils that may especially be mentioned include: - synthetic ethers containing from 10 to 40 carbon atoms;

- linear or branched hydrocarbons of mineral or synthetic origin such as petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam, and squalane, and mixtures thereof, and in particular hydrogenated polyisobutene,

- synthetic esters, for instance oils of formula R₁COOR₂ in which R₁ represents a linear or branched fatty acid residue containing from 1 to 40 carbon atoms and R₂ represents a hydrocarbon-based chain that is especially branched, containing from 1 to 40 carbon atoms provided that R₁ + R₂ > 10.

The esters may be chosen especially from iatty acid esters, for example:

- cetostearyl octanoate, isopropyl alcohol esters, such as isopropyl myristate or isopropyl palmitate, ethyl palmitate, 2-ethylhexyl palmitate, isopropyl stearate or isostearate, isostearyl isostearate, octyl stearate, hydroxylated esters, for instance isostearyl lactate, octyl hydroxystearate, diisopropyl adipate, heptanoates, and especially isostearyl heptanoate, alcohol or polyalcohol octanoates, decanoates or ricinoleates, for instance propylene glycol dioctanoate, cetyl octanoate, tridecyl octanoate, 2-ethylhexyl 4-diheptanoate and palmitate, alkylbenzoate, polyethylene glycol diheptanoate, propylene glycol 2-diethyldihexanoate and mixtures thereof, C₁₂ to C₁₅ alcohol benzoates, hexyl laurate, neopentanoic acid esters, for instance isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate and octyldodecyl neopentanoate, isononanoic acid esters, for instance isononyl isononanoate, isotridecyl isononanoate and octyl isononanoate, and hydroxylated esters, for instance isostearyl lactate and diisostearyl malate;

- polyol esters and pentaerythritol esters, for instance dipentaerythrityl tetrahydroxystearate/tetraisostearate;

- esters of diol dimers and diacid dimers such as Lusplan DD-DA5^® and Lusplan DD-D A7^®, sold by the company Nippon Fine Chemical and described in patent application FR 0302809 filed on March 6, 2003; - fatty alcohols that are liquid at room temperature, with a branched and/or unsaturated carbon-based chain containing from 12 to 26 carbon atoms, for instance 2-octyldodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-butyloctanol and 2-undecylpentadecanol; and - dialkyl carbonates, the two alkyl chains possibly being identical or different, such as dicaprylyl carbonate sold under the name Cetiol CC^® by Cognis.

The volatile hydrocarbon-based oils may be chosen from hydrocarbon-based oils containing from 8 to 16 carbon atoms, for instance paraffins, and especially branched C₈-C₁₆ alkanes (also known as isoparaffins), for instance isododecane (also known as 2,2,4 ,4,6-pentamethylheptane), isodecane, isohexadecane and, for example, the oils sold under the trade names Isopars^® or Permethyls^®.

The compositions according to the invention may also contain volatile or nonvolatile silicone oils.

The nonvolatile silicone oils that may be used in the composition according to the invention may be nonvolatile polydimethylsiloxanes (PDMS), polydimethylsiloxanes comprising alkyl or alkoxy groups that are pendent and/or at the end of a silicone chain, these groups each containing from 2 to 24 carbon atoms, phenyl silicones, for instance phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenylsiloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes and 2-phenylethyl trimethylsiloxysilicates, and dimethicones or phenyltrimethicones with a viscosity of less than or equal to 100 cSt, and mixtures thereof.

Volatile silicone oils that may more particularly be used include volatile linear or cyclic silicone oils, especially those with a viscosity < 8 centistokes (8 x 10^"6 mVs) and especially containing from 2 to 10 silicon atoms and in particular from 2 to 7 silicon atoms, these silicones optionally comprising alkyl or alkoxy groups containing from 1 to 10 carbon atoms. As volatile silicone oils that may be used in the invention, mention may be made especially of dimethicones with a viscosity of 5 and 6 cSt, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexa- siloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and dodecamethylpentasiloxane, and mixtures thereof. Volatile fluoro oils such as nonafluoromethoxybutane or perfluoro- methylcyclopentane, and mixtures thereof, may also be used.

The compositions according to the invention may also advantageously comprise at least one compound chosen from waxes and pasty iatty substances, and mixtures thereof.

b) Waxes

The wax is solid at room temperature (25°C), has a reversible solid/liquid change of state, has a melting point of greater than 30°C, which may be up to 200°C and a hardness of greater than 0.5 MPa, and has an anisotropic crystal organization in the solid state.

It may be a hydrocarbon-based wax, fluoro wax and/or silicone wax and may be of animal, plant, mineral or synthetic origin.

Advantageously, the compositions in accordance with the present invention comprise at least one wax chosen from waxes approved for food use. For the purposes of the present invention, a "wax approved for food use" covers ozokerite and rice wax and the waxes referenced in the Codex alimentarius, more particularly including the waxes referenced in table 1 of the Codex alimentarius.

Thus, the compositions in accordance with the present invention advantageously comprise a wax chosen from beeswax, ozokerite, rice wax, carnauba wax, candelilla wax and microcrystalline waxes, and mixtures thereof.

According to one embodiment of the instant invention, the wax compounds are food grade compounds, as defined here-above, and more particularly are referenced in the US code of Federal Regulation Title 21 Chap I Part 184. Advantageously, the wax used in the cosmetic compositions in accordance with the invention is chosen from the microcrystalline wax sold by Paramelt and more particularly ozokerite, beeswax, candelilla wax or carnauba wax sold by Strahl & Pitsch, and mixtures thereof.

These waxes are preferably used under a form specified by the supplier as being convenient for food industry.

According to one particular embodiment, the wax(es) approved for food use is or are present in the cosmetic compositions in accordance with the present invention in a content ranging from 1% to 50%, in particular from 3% to 40%, in particular from 5% to 30% and especially from 7% to 20% by weight relative to the total weight of the compositions.

Besides these waxes approved for food use, the compositions according to the invention may comprise one or more waxes chosen, for example, from synthetic waxes, for instance polyethylene waxes (preferably with a molecular weight of between 400 and 600) or Fischer-Tropsch waxes, silicone waxes, for instance alkyl or alkoxy dimethicones containing from 16 to 45 carbon atoms, paraffin waxes, ceresins, for instance isoparaffins with a melting point of less than 40°C, such as EMW-0003, sold by the company Nippon Seirou, α-olefrn oligomers, such as the polymers Performa V^® 825, 103 and 260, sold by the company New Phase Technologies; ethylene-propylene copolymers, such as

Performalene^® EP 700, and mixtures thereof.

c) Pasty compounds The cosmetic compositions in accordance with the present invention may also comprise at least one pasty compound.

For the purposes of the present invention, the term "pasty" refers to a fatty compound with a reversible solid/liquid change of state and comprising, at a temperature of 25°C, a liquid fraction and a solid fraction. The term pasty also means polyvinyl laurate. Polyol esters are most particularly suitable as pasty compounds according to the invention.

The polyol esters that may be used in the context of the present invention are commercially available or may be prepared in a conventional manner. They are generally of plant origin and may be obtained especially by mono- or polyesterification of a polyol with a C₂-C₃₄ monocarboxylic acid, for instance a fatty acid or with a dicarboxylic acid such as a diacid dimer.

The ester obtained may especially be a polyester, a triester, a diester, a monoester or a mixture thereof. In the present case, the ester may be a mixture of two or more types of ester formed with different carboxylic acids. In the case of esterification with a monocarboxylic acid, esters with a relatively high molecular weight, ranging from about 200 to 1300 g/mol, may be obtained. In the esterification reaction with a dicarboxylic acid, a polyol dicarboxylate may be obtained, which has a weight-average molecular weight, determined by gel permeation chromatography (GPC), ranging from 200 to 20 000 g/mol and preferably between 2000 and 4000 g/mol. For the purposes of the present invention, the terms "polyol" and "polyhydric alcohol" should be understood as meaning any organic molecule comprising at least two free hydroxyl groups.

The polyhydric alcohols that are advantageously suitable for the formulation of the cosmetic compositions according to the present invention are those especially containing from 2 to 20 carbon atoms, in particular from 3 to 10 carbon atoms and more particularly from 4 to 6 carbon atoms.

Advantageously, the polyol may be chosen, for example, from a diol dimer, glycerol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol, diethylene glycol, sorbitol, hydroxypropyl sorbitol and 1,2,6-hexanetriol; glycol ethers (especially containing from 3 to 16 carbon atoms) such as mono-, di- or tripropylene glycol (Ci-C₄)alkyl ethers and mono-, di- or triethylene glycol (Ci-C₄)alkyl ethers; and mixtures thereof.

It may also be a "diol dimer", i.e. saturated diols produced by hydrogenation of the corresponding diacid dimers. A diol dimer may be produced by hydrogenation of a diacid dimer, which is itself obtained by dimerization of an unsaturated fatty acid especially of C₈ to C₃₄, such as those mentioned previously, especially of C₁₂ to C22 and in particular of C₁₆ to C₂₀, preferably C₁₈ such as, for example, oleic acid and linoleic acid.

The polyols that are more particularly suitable are sugars chosen from monosaccharides, disaccharides and trisaccharides. Illustrations of these sugars that may especially be mentioned include monosaccharides such as xylose, arabinose, galactose, fructose, mannose and glucose, and mixtures thereof. Illustrations of disaccharide polyols that may more particularly be mentioned include maltose, lactose and sucrose and combinations thereof. The monocarboxylic acid that may be used in the present invention may contain from 2 to 34 carbon atoms and especially from 10 to 32 carbon atoms. By way of illustration of monocarboxylic acids that are suitable for the invention, mention may be made especially of:

- saturated linear acids such as butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, docosanoic acid and tetracosanoic acid,

- branched fatty acids, for instance isobutanoic acid, isopentanoic acid, pivalic acid, isohexanoic acid, isoheptanoic acid, isooctanoic acid, dimethyloctanoic acid, isononanoic acid, isodecanoic acid, isoundecanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, isoheptadecanoic acid, isooctadecanoic acid, isononadecanoic acid, isoeicosanoic acid, 2-ethylhexanoic acid, 2-butyloctanoic acid, 2-hexyldecanoic acid, 2-octyldodecanoic acid, 2-decyltetradecanoic acid, 2-dodecylhexadecanoic acid, 2-tetradecyloctadecanoic acid, 2-hexadecyloctadecanoic acid and long-chain fatty acids obtained from lanolin,

- unsaturated linear C₈ to C₃₄ fatty acids, such as undecenoic acid, linderic acid, myristoleic acid, palmitoleic acid, oleic acid, linoleic acid, elaidinic acid, gadolenoic acid, eicosapentaenoic acid, docosahexaenoic acid, erucic acid, brassidic acid and arachidonic acid, - hydroxy acids such as 2-hydroxybutanoic acid, 2-hydropentanoic acid,

2-hydroxyhexanoic acid, 2-hydroxyheptanoic acid, 2-hydroxyoctanoic acid, 2-hydroxynonanoic acid, 2-hydroxydecanoic acid, 2-hydroxyundecanoic acid, 2-hydroxydodecanoic acid, 2-hydroxytridecanoic acid, 2-hydroxytetradecanoic acid, 2- hydroxyhexadecanoic acid, 2-hydroxyheptadecanoic acid, 2-hydroxyoctadecanoic acid, 12-hydroxyoctadecanoic acid, 2-hydroxynonadecanoic acid, 2-hydroxyeicosanoic acid, 2- hydroxydocosanoic acid and 2-hydroxytetracosanoic acid,

- cyclic acids such as cyclohexanoic acid, hydrogenated rosin, rosin, abietic acid, hydrogenated abietic acid, benzoic acid, p-oxybenzoic acid, p-aminobenzoic acid, cinnamic acid, p-methoxycinnamic acid, salicylic acid, gallic acid, pyrrolidonecarboxylic acid and nicotinic acid, and

- fatty acids of natural origin, such as the fatty acids of orange oil, of avocado oil, of macadamia oil, of olive oil, of hydrogenated soybean oil, of jojoba oil, of palm oil, of castor oil, of wheatgerm oil, of saffron oil, of cottonseed oil and of mink oil, and mixtures thereof.

It is more particularly a fatty acid, especially as defined above.

The dicarboxylic acid that may be used according to the invention should contain at least two carboxylic groups per molecule.

It may be represented especially by the formula below:

HOOC-(CH₂)_n-COOH in which n is an integer from 1 to 16 and preferably from 3 to 16.

As nonlimiting illustrations of dicarboxylic acids that are suitable for the invention, mention may be made especially of malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, 1,9-nonamethylenedicar- boxylic acid, 1,10-decamethylenedicarboxylic acid, 1,11-undecamethylenedicarboxylic acid, 1,12-dodecamethylenedicarboxylic acid, 1,13-tridecamethylenedicarboxylic acid, ljH-tetradecamethylenedicarboxylic acid, 1,15-pentadecamethylenedicarboxylic acid and 1,16-hexadecamethylenedicarboxylic acid, and mixtures thereof.

The dicarboxylic acid may also be a diacid dimer. The term "diacid dimer" denotes a diacid obtained by polymerization reaction, especially by intermolecular dimerization of at least one unsaturated fatty acid especially of C₈ to C₃₄, such as those mentioned previously, especially Of C₁₂ to C22 and in particular of C₁₆ to C₂₀, preferably of C₁₈ such as, for example, oleic acid and linoleic acid.

Polyol polyesters in which the fatty acid ester units of the polyester comprise saturated or unsaturated chain lengths chosen such that the compound has the required behavior in terms of pasty compounds according to the invention, are also most particularly suitable as polyol esters. The unsaturated fatty acid chains are typically branched chains and more particularly contain from 12 to about 22 and more particularly from about 18 to 20 carbon atoms.

The unsaturated fatty acid chains more particularly considered are monounsaturated and/or diunsaturated C₁₈ fatty acids. These long chains may be combined with shorter saturated fatty acid chains.

They are generally linear and contain from 2 to about 12, preferably from 6 to about 12 and more particularly from 8 to 10 carbon atoms. In general, the degree of esterification of these fatty acid esters is such that about 60% of the hydroxyl functions of the polyols and more particularly about 85% or even 95% of the hydroxyl functions of the polyols are esterified.

As regards the unsaturated long-chain fatty acid ester units, mention may be made more particularly of lauroleates, myristoleates, palmitoleates, oleates, elaidates, eructates, linoleates, linolenates, arachidonates, eicosapentaenoates and docosahexaenoates. For reasons of stability to oxidation, monounsaturated and diunsaturated fatty acid chains are preferred.

As regards the long-chain unsaturated fatty acid ester units, mention may be made more particularly of arachidate, behenate, linoserate and serotate esters.

As regards the short-chain saturated fatty acid ester units, they may be more particularly acetate, caproate, caprylate, caprate and laurate.

As solid polyol fatty acid polyesters that are most particularly suitable for the invention, mention may be made more particularly of raffinose octaesters in which the esterifying fatty acid parts are linoleate and behenate, maltose hectaesters in which the esterifying fatty acid parts are derived from sunflower seed oil fatty acid and from lignoserate, sucrose octaesters in which the esterifying fatty acid parts are behenate and oleate, and sucrose octaesters in which the esterifying fatty acid parts are laurates, linoleates and behenates. Such solid fatty acid polyesters may be obtained according to methods already described for the preparation of the polyol polyesters. In this respect, reference may be made especially to documents US 5 306 516, US 5 306 515, US 5 305 514, US 4 797 300, US 3 963 699, US 4 518 772 and US 4 517 360.

According to one embodiment, the composition according to the invention comprises at least one ester of at least one carboxylic acid containing 1 to 7 carbon atoms and of a polyol containing at least 4 hydroxyl groups, the said ester having for example a molecular mass of less than 5 000 g/mol.

The ester preferably has a molecular mass of less than 2 000, more preferably less than 1 000, more preferably still less than 900 g/mol. The molecular mass of the ester is preferably greater than 100 g/mol.

Such esters are particularly interesting for enhancing the wear of the compositions incorporating them. The polyol according to the invention may be a monosaccharide, a polyhydroxyaldehyde (aldose) or polyhydroxyketone (ketose), which is cyclized or not. The polyol is preferably a monosaccharide cyclized in hemiacetal form.

The polyol may also be a polyol derived from a monosaccharide, such as eythritol, xylitol or sorbitol.

Among aldoses mention may be made of D-ribose, D-xylose, L-arabinose, D- glucose (or alpha-D-glucopyranose when in cyclic hemiacetal form), D-mannose and D- galactose.

Among ketoses mention may be made of D-xylulose and D-fructose (or beta- D-fructofuranose when in cyclic hemiacetal form).

The polyol may be a monosaccharaide or a polysaccharide containing from 1 to 10 monosaccharide units, preferably from 1 to 4, more preferably 1 ot 2 monosaccharide units.

The polyol is preferably selected from erythritol, xylitol, sorbitol, glucose and sucrose.

The polyol according to the invention is preferably a disaccharide. Among disaccharides mention may be made of sucrose (alpha-D-glucopyranosyl-(l-3)-beta-D- fructofuranose), lactose (beta-D-galactopyranosyl-l(l-4)-beta-D-glucopyranose) and maltose (alpha-D-glucopyranosyl-(l -4)-beta-D-glucopyranose). The polyol may be a polysaccharide composed of two or more identical monosaccharide units or at least two different monosaccharide units. The ester according to the invention may be composed of a polyol substituted by at least two different monocarboxylic acids or by at least three different monocarboxylic acids.

The ester may be obtained by copolymerizing two esters according to the invention, in particular by copolymerizing i) a sucrose substituted by benzoyl groups and ii) a sucrose substituted by acetyl and/or isobutyryl groups.

The ester preferably contains no polar group, in particular no hydroxyl group. In other words, during the esterification reaction between the acid and the polyol, the acid is added in an amount sufficient to react with all of the hydroxyl groups of the polyol. The polar groups are, for example, ionic or non-ionic polar groups selected from -COOH; -OH; ethylene oxide; propylene oxide; -PO₄; -NHR; -NR₁R₂ with R₁ and R₂ optionally forming a ring and each representing a linear or branched C₁ to C₂₀ alkyl or alkoxy radical. The acid is preferably a monocarboxylic acid containing 1 to 7 carbon atoms, preferably 1 to 5 carbon atoms. It may be selected in particular from acetic, n-propanoic, isopropanoic, n-butanoic, isobutanoic, tert-butanoic, n-pentanoic and benzoic acids.

The ester may be obtained from at least two different monocarboxylic acids. In one embodiment the acids is an unsubstituted linear or branched acid.

The acid is preferably selected from acetic acid, isobutyric acid and benzoic acid.

In one preferred embodiment the ester has sucrose diacetate hexa(2- methylpropanoate) as a chemical name, and can bear the INCI name sucrose acetate isobutyrate.

As pasty compounds that are advantageously suitable for the formulation of the cosmetic compositions in accordance with the present invention, mention may be made more particularly of fractionated hydrogenated triglycerides and especially those sold by SIO; hydrogenated plant oils, hydrogenated palm oil, cocoa butter and, for example, those sold by Karlshamns, solid cottonseed oil, for example the oil sold by SIO, and sucrose acetate isobutyrate, for example the product sold by Eastman Chemical.

Among the other pasty compounds that may be used in the composition according to the invention, mention may also be made of lanolines and lanoline derivatives, for instance acetylated lanolines, oxypropylenated lanolines or isopropyl lanolate, and mixtures thereof. However, the amount in lanoline(s) will be also adjusted for avoiding any undesirable effect in particular in term of smell as soon as these compounds are inclined to oxidize with time.

Mention may also be made of pasty silicone compounds such as high molecular weight polydimethylsiloxanes (PDMS) and in particular those with pendent chains of the alkyl or alkoxy type containing from 8 to 24 carbon atoms, and a melting point of 20-55°C, for instance stearyl dimethicones, especially those sold by the company

Dow Corning under the trade names DC2503^® and DC25514^®, and mixtures thereof.

According to one variant of the invention, the solid substances, of wax or pasty compound type, may be chosen for their efficacy in texturing a liquid fatty phase. In general, the compounds that are suitable in this respect have a melting point of greater than or equal to 50°C, in particular greater than or equal to 55°C or even ranging from 55 to

150°C and even from 60 to 130°C. Besides the waxes and certain pasty compounds, fillers such as Nylon may also be used.

In accordance with a preferred embodiment, the compositions according to the invention contain - at least one hydrocarbon-based plant oil like for example canola oil, caprylic/capric acid triglycerides and/or one of their mixtures and

- at least one ester of at least one carboxylic acid containing 1 to 7 carbon atoms and of a polyol containing at least 4 hydroxyl groups, in particular the sucrose diacetate hexa(2-methylpropanoate) and - at least one hydrogenated vegetable oil.

According to a more specific embodiment, the compositions according to the invention contain

- about 10 to 40% by weight of hydrocarbon-based plant oil(s) in particular non hydrogenated vegetable oil(s), - about 20 to 70% by weight of ester(s) of at least one carboxylic acid containing 1 to 7 carbon atoms and of a polyol containing at least 4 hydroxyl groups, and

- about to 10 to 40% by weight of hydrogenated vegetable oil(s)

The percentages being expressed relative to the total weight of the mixture of said compounds.

Naturally, such compositions may further contain at least one compound selected among waxes, dyestuffs and fillers as described here above, like for example rice starch and mixtures thereof.

GLOSS TEST

Advantageously, the cosmetic compositions according to the invention may also have a gloss of greater than or equal to 5, in particular greater than or equal to 10, especially greater than or equal to 15, more particularly greater than or equal to 20, especially greater than or equal to 25, greater than or equal to 30, or even of about 50. The term "gloss" denotes the gloss as may be measured by the following method, using a gonioreflectometer machine, for instance the GRM-2000 machine (from Micromodule), using an azimuth illumination angle of 30° relative to the normal of the sample, a specular reflection (R) detection angle of -30° and a diffuse reflection (D) detection angle of 0°.

A support of rectangular foam type 40 x 70 mm in size is made using a brick-red foam (L* = 37 ± 3; a* = 15 ± 2; b* = 11 ± 2 in the CIE L* a *b* 1976), made of Neoprene ^® 3 mm thick, which has an adhesive face, especially a foam known under the trade reference RE40 x 70 C/C 212B 1 skin, sold by the company Joint Technique

Lyonnais Ind.

A transparent adhesive plaster sold by the company 3M under the trade reference Blenderm^® FH 5000-55113, having a wear quality such that the application of a composition to this coating makes it possible to simulate application to the skin or mucous membranes, the sensation on application and the resulting color being similar even if the film gives poor coverage, is attached to the face opposite the adhesive face of this support.

The foam support bearing the transparent adhesive plaster is then attached, by bonding by means of its adhesive face, to a metal plate 40x70 mm in size. The assembly consisting of the support bonded to the metal plate forms a specimen.

The operator produces a total of 5 specimens identical to the one described above.

One embodiment of the process for evaluating the gloss will now be described.

The operator places the specimen on a hotplate set at a temperature of 38.5°C, for example a hotplate of the type N81076 sold by the company Fisher Bioblock, and waits for the face of the support bearing the adhesive coating to reach a temperature of 33±1°C.

Once the support is at the desired temperature, the operator manually applies a film about 15 μm thick of the cosmetic product to the Blenderm^® coating.

The cosmetic product, which is, for example, a lipstick, was stored at 24±2°C. The action performed by the operator to deposit the film of product consists of a to-and-fro motion, so as to obtain a uniform deposit. The application of the product to the support is preferably performed so as to be as representative as possible of the real conditions of application of the product. The same test product is applied in an identical manner to the five same specimens prepared previously. The film of product is left to dry, the specimen being placed on the hotplate, such that the support remains at 33±1°C for 10 minutes. The intensity of the specular reflection and that of the diffuse reflection of the film of product are measured at the incidences specified previously, for each of the five specimens.

From the measured values, the gloss Gloss_t is calculated for each specimen via the ratio R/D for this specimen. The weighting of the specular reflection measurement, generally used alone to characterize the gloss, by the diffuse reflection measurement (representative of the color/lightness of the sample) allows the visual perception of the gloss to be better appreciated.

The mean gloss value Gloss may finally be calculated:

Gloss = — y Gloss_τ

N T

JN∑Glossϊ - (∑Gloss, ) standard deviation: σαoss = „

N(N - Y)

95% confidence interval: Gloss ± 1.96

where N denotes the number of measurements, i.e. 5 in the present case.

FILLER

The cosmetic compositions may also furthermore contain fillers of mineral or organic origin.

Needless to say, compounds proposed above, especially as coloring agent, are capable of jointly iulfilling this function. Nonpigmentary inorganic compounds approved by the Codex alimentarius and more particularly referenced in table 1 thereof are most particularly suitable for the invention.

In this respect, mention may be made more particularly of talc, precipitated calcium carbonate, magnesium carbonate, rice starch and magnesium hydrogen carbonate.

ADDITIVES

The compositions according to the invention may also comprise any ingredient conventionally used as additives in cosmetics and dermatology. These additives are advantageously chosen from the food additives proposed in table 1 of the Codex alimentarius, for example antioxidants, thickeners, sequestrants, acidifying or basifying agents and preserving agents, and mixtures thereof.

The compositions according to the invention may also contain flavorings and/or fragrances.

The amounts of these various ingredients are those conventionally used in the fields under consideration and range, for example, from 0.01% to 20% by weight relative to the total weight of the composition.

Needless to say, a person skilled in the art will take care to select this or these optional additional compound(s), and/or the amount thereof, such that the advantageous properties of the product according to the invention are not, or are not substantially, adversely affected by the addition under consideration.

The compositions according to the invention may obviously be obtained according to the preparation processes conventionally used in cosmetics or dermatology. The compositions according to the invention may be in the form of a colored or uncolored product or in the form of an antisun product. They may especially contain cosmetic active agents such as sunscreens, vitamins A, E, C or B3, provitamins, for instance D-panthenol, calmative active agents, for instance α-bisabolol, aloe vera or allantoin, plant extracts or essential oils, protective or restructuring agents, for instance ceramides, refreshing active agents, for instance menthol and its derivatives, emollients (cocoa butter), moisturizers (arginine PCA), antiwrinkle active compounds and essential fatty acids, and mixtures thereof.

The compositions that are suitable for use in the present invention may advantageously be applied to the skin and/or the lips. A composition according to the invention may especially also be in the form of a makeup and/or care product for the skin and/or the lips, especially the lips. It may optionally have treating properties.

They may be used especially as care or treatment bases for the lips for protecting the lips against the cold and/or sunlight and/or the wind. The example presented below is given as a nonlimiting illustration of the present invention. EXAMPLE 1

In the example, the compounds can be independently one from the other be chosen from compounds approved for food use. According to one embodiment they can independently advantageously be food grade compounds as defined here-above. Makeup film for the lips

Hydroxypropy lmethy lcellulo se 1O g

Glycerol 3 g

Yellow iron oxide/brown iron oxide 1 g

Purified water 50 g

The ingredients are dissolved together in the purified water with stirring. The solution is applied to a silicone paper to a thickness of about 500 μm, and then dried at a temperature of 50°C. After drying, the film obtained is recovered and cut into strips 5 mm wide and 40 mm long.

Claims

1. A cosmetic process for making up and/or caring for keratin material(s), comprising the application, on contact with a keratin material, of at least one cosmetic composition comprising at least one water-soluble polymer and which is in the form of an anhydrous film, said application being made under conditions suitable for dissolution of said polymer and in which said cosmetic composition consists of at least 50% by weight of compound(s) approved for food use relative to its total weight, and is formed from at least one layer composed of a matrix based on said water-soluble polymer, with the proviso that when said composition is formed from a single layer comprising hydroxypropylmethylcellulose as sole water-soluble polymer, said composition does not also contain either 28.5% by weight of glycerol in combination with 2.85% by weight of disodium salt of iuschin, or 21% by weight of glycerol in combination with 7% by weight of a mixture of titanium dioxide and brown iron oxide.

2. The process as claimed in claim 1, in which the dissolution of said polymer is performed by contact of said composition with water.

3. The process as claimed in claim 1 or 2, in which the dissolution of said polymer is performed by contact of said composition with a moistened keratin material.

4. The process as claimed in the preceding claim, in which the keratin material is moistened prior to contact with said composition.

5. The process as claimed in claim 3 or 4, in which the keratin material is moistened following contact with said composition.

6. The process as claimed in claim 1 or 2, in which the dissolution of said polymer is performed by placing said composition in contact with water prior to its contact with said keratin material.

7. The process as claimed in either of claims 1 and 2, in which said composition is applied to the lips and the dissolution of said polymer is performed by the water contained in saliva.

8. The process as claimed in the preceding claim, also comprising the dissolution of the water-soluble polymer(s) composing the film applied to the lips via the action of saliva and rubbing the lips together or pressing with a finger.

9. The process as claimed in any one of the preceding claims, in which said composition comprises at least 55%, especially at least 60%, in particular at least 65% by weight, especially at least 70%, in particular at least 75%, in particular at least 80%, in particular at least 90% and more particularly consists of about 100% by weight, relative to its total weight, of compound(s) approved for food use.

10. The process as claimed in any one of the preceding claims, in which the water-soluble polymer is chosen from polymers of protein type; chitin- or chitosan-based polymers; polysaccharide polymers; acrylic polymers or copolymers; vinyl polymers; copolymers of vinylpyrrolidone and of caprolactam, and mixtures thereof.

11. The process as claimed in the preceding claim, in which the polysaccharide polymer is a cellulose-based polymer chosen especially from hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, methylcellulose, methylethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose and quaternized cellulose derivatives, and mixtures thereof.

12. The process as claimed in any one of the preceding claims, in which the composition also comprises at least one dyestuff chosen from compounds referenced in the Codex alimentarius, pearls consisting of materials referenced in the Codex alimentarius, and mixtures thereof.

13. The process as claimed in claim 12, in which the dyestuff is present in a content ranging from 0.005% to 20% by weight, in particular from 0.01% to 10% by weight and more particularly from 0.05% to 5% by weight relative to the total weight of the composition.

14. The process as claimed in any one of the preceding claims, in which said composition comprises at least one fatty phase.

15. The process as claimed in the preceding claim, in which the fatty phase comprises at least one compound chosen from oils, waxes and pasty fatty substances, and mixtures thereof.

16. The process as claimed in any one of the preceding claims, in which said composition also comprises at least one active compound.

17. The process as claimed in any one of the preceding claims, in which the composition also has a gloss value at least greater than or equal to 5, or even at least greater than or equal to 10, especially greater than or equal to 15, in particular greater than or equal to 20 and more particularly greater than or equal to 25 or even of about 30.

18. The process as claimed in any one of the preceding claims, in which the film is free of water- insoluble support layer.

19. The process as claimed in any one of claims 1 to 17, in which the composition comprises a support layer.

20. The process as claimed in any one of the preceding claims, in which the composition is applied to the skin and/or the lips.

21. The process as claimed in any one of the preceding claims, in which the composition is a makeup and/or care product for the skin and/or the lips, and especially the lips.

22. A cosmetic composition for making up and/or caring for the lips, which is in the form of an anhydrous film, said cosmetic composition comprising at least 50% by weight of compound(s) approved for food use relative to its total weight, including at least particles with a color and/or optical effect, having a multilayer structure and consisting exclusively of compounds referenced in the Codex alimentarius and/or at least 1% by weight of particles with a color and/or optical effect consisting of at least one organic material with a color and/or optical effect adsorbed onto a water-insoluble mineral substrate, said film being formed from at least one layer composed of a matrix based on at least one water-soluble polymer, with the proviso that when said film is formed from a single layer comprising hydroxypropylmethylcellulose as sole water-soluble polymer, it does not also contain either 28.5% by weight of glycerol in combination with 2.85% by weight of disodium salt of fuschin, or 21% by weight of glycerol in combination with 7% by weight of a mixture of titanium dioxide and brown iron oxide.

23. The composition as claimed in the preceding claim, in which the water- soluble polymer is as defined according to claim 10 or 11.

24. The composition as claimed in either of claims 22 and 23, in which the particles with a multilayer structure are pearls.

25. The composition as claimed in any one of claims 22 to 24, in which the particles consisting of at least one organic material with a color and/or optical effect adsorbed onto a water-insoluble mineral substrate are lakes.