Cosmetic composition comprising a sequenced polymer and a plasticizer

Translation of description of equivalent WO 2004028490 A2

Cosmetic composition comprising a block polymer and a plasticizer

The present invention relates to a cosmetic composition comprising a block polymer and a special plasticizer for application to the keratin materials of human beings, such as the skin, lips, eyelashes, eyebrows, nails, hair. The composition is more particularly intended to be applied on the skin or lips.

The composition according to the invention may be a makeup composition or a care composition for keratin materials, especially the skin and lips, and preferably a makeup composition.

The makeup composition may be a lip makeup product (lipstick), a foundation, an eyeshadow, a blusher, a concealer product, an eyeliner, a body makeup product, mascara, a nail varnish, a hair makeup product.

The care composition can be a skin care product of the body and face, including a solar product, a skin coloring product (such as a self-tanning). The composition may also be a hair product, especially for holding the hairstyle or shaping the hair.

lipstick compositions and foundation are commonly used to give an aesthetic color to the lips or skin, particularly the face. These makeup products generally contain fatty phases such as waxes and oils, pigments and / or fillers and optionally additives such as cosmetic or dermatological active agents.

These compositions, when applied to the skin, exhibit the disadvantage of transferring, that is to say to be deposited at least partly, leaving traces on certain substrates with which they may be contacted including a glass, cup, a cigarette, clothing or skin. It follows a poor holding of the applied film, requiring regular renewal application of the primer composition of foundation or lipstick. Moreover, the appearance of these unacceptable traces, in particular on shirt collars, can dissuade some women from using this type of makeup.

therefore sought keratin material makeup compositions, including lips and skin advantageously "transfer" which have the advantage of forming a deposit of good performance, especially that is not deposited, at least in part, on supports with which they come into contact (glass, clothing, cigarette, tissues).

To improve the holding of makeup products, it is known to use film-forming polymers. For example, US-6074654 and WO02 / 067877 propose to use silicone resins.

But the introduction of these film-forming polymers can result in too hard films which have a tendency to crack over time. In particular, these hard films do not correctly follow the movement of the skin or lips and thus exhibit poor hold on the skin or lips, the film rapidly disintegrating.

Moreover, a too hard film deposited on the lips or the skin will cause a tugging sensation, making the deposit uncomfortable for the wearer.

The present invention therefore aims to provide a cosmetic composition capable of forming a flexible film, in particular able to follow the movement of the lips or skin.

The invention also aims to provide a cosmetic composition forming a deposit on keratin materials, in particular on the skin or the lips, comfortable over time.

The inventors have discovered that it is possible to obtain such a composition using a polymer particular sequence associated with a particular plasticizer. More specifically, the present invention therefore relates to a cosmetic composition, especially for making up or caring for keratin materials, in particular of the skin or the lips, comprising an organic liquid cosmetically acceptable medium, a block polymer and a plasticizer characterized in that:

- The block polymer is a film-forming linear ethylenic polymer,

- The plasticizer being as described below.

The invention also relates to a cosmetic composition, especially for making up or caring for keratin materials, especially the skin or lips, comprising a cosmetically acceptable organic liquid medium, a block polymer and a plasticizer, characterized in that : •

- The block polymer is a film-forming linear ethylenic polymer, - the plasticizer is a compound having a solubility parameter δ ranging from 5.5 to 11 (J / cm³)^1/2.

Advantageously, the block polymer is free of styrene.

Advantageously, the block polymer is non-elastomeric.

More preferably, the polymer sequence comprises least one first block and at least one second block that have different glass transition temperatures (Tg), said first and second blocks being linked together via an intermediate block comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block.

It was noted that in the above and following the terms "first" and "second" blocks do not in any way condition the order of the said sequences (or blocks) in the polymer structure.

By "at least one block" means one or more sequences. Preferably, the polymer has a polydispersity index I of greater than 2,

Preferably also, the first and second blocks are incompatible with one another.

The composition according to the invention allows to obtain a deposit, such as a deposit of makeup on keratin materials, in particular on the skin or the lips having a good gloss and good transfer-resistance properties.

The composition according to the invention also provides a deposit on keratin materials, especially the skin or lips having no sensation of dryness, tightness: the resulting deposit is comfortable over time for user.

The invention also relates to a method making up keratinous materials, especially the skin or lips, comprising applying to the keratin materials, especially the skin or the lips of a composition as defined above.

The invention also relates to the use of a composition as defined above to obtain a deposit, in particular a makeup, on keratinous substances, in particular on the skin or the lips, flexible and / or comfortable over time .

The invention also relates to the use, in a cosmetic composition containing a cosmetically acceptable organic liquid medium,

- A film-forming linear ethylenic polymer sequence,

- And a plasticizer having a solubility parameter δ_h from 5.5 to 11 (J / cm³)^1/2, To obtain a deposit, in particular a makeup, on keratinous substances, in particular on the skin or the lips, flexible and / or comfortable over time. Cosmetically acceptable organic liquid medium is meant a medium comprising at least a liquid organic compound at room temperature (25 ° C) and atmospheric pressure (10⁵ Pa) compatible with keratin materials, especially the skin, the lips, such as oils or organic solvents commonly used in cosmetic compositions.

The block polymer of the composition according to the invention is an ethylene polymer film-forming linear sequence.

The term "ethylenic polymer" means a polymer obtained by polymerizing monomers comprising an ethylenic unsaturation.

By "block polymer" means a polymer comprising at least two different blocks and preferably at least three distinct sequences.

The polymer is a polymer of linear structure. In contrast, a polymer non-linear structure is, for example, a polymer of branched structure, star, graft, or otherwise.

By polymer "film" means a polymer capable, by itself or in the presence of an auxiliary film-forming agent, a continuous film that adheres to a support, especially to keratin materials.

"Mutually incompatible blocks with each other" means that the mixture formed from the polymer corresponding to the first block and the polymer corresponding to the second block is not miscible in the majority organic liquid βn weight of the liquid medium organic composition at room temperature (25 ° C) and atmospheric pressure (10⁵ Pa), for a content of the upper polymer blend or equal to 5% by weight, relative to the total weight of the mixture (polymers and solvent), it being understood that: i) the said polymers are present in the mixture in an amount such that the respective weight ratio ranges from 10/90 to 90/10, and ii) each of the polymers corresponding to the first and second blocks has an average molecular mass (weight or number) equal to that of the block polymer +/- 15% . In the case where the organic liquid medium comprises a mixture of organic liquid, and in the event of two or more organic liquids present in identical mass proportions, the said polymer mixture is immiscible in at least one of them.

Of course, in the case where the organic liquid medium comprises a single organic liquid, the latter is the majority organic liquid.

Advantageously, the majority organic liquid of the composition is the organic solvent for polymerization of the block polymer or the majority of the organic solvent organic solvent mixtures polymerization of polymer block.

The intermediate sequence is a sequence comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block of the polymer used to "compatibilize" these sequences.

Preferably, the polymer used in the composition according to the invention comprises no silicon atoms in its skeleton. The term "skeleton" means the main chain of the polymer, as opposed to the pendent side chains.

Preferably, the polymer used in the composition according to the invention is not * water soluble, i.e. the polymer is not soluble in water or in a mixture of water and linear lower monoalcohols branched having 2 to 5 carbon atoms such as ethanol, isopropanol or n-propanol, without pH modification, at an active material content of at least 1% by weight at room temperature (25 ° C ).

Preferably, the polymer used in the composition according to the invention is not an elastomer. "Non-elastomeric polymer" means a polymer which, when subjected to a stress intended to stretch it (for example by 30% relative to its initial length), does not return to a length substantially identical to its length initial when the stress.

More specifically, "non-elastomeric polymer" denotes a polymer with an instantaneous recovery R_\ <50% and a delayed recovery R_2n <70% after having undergone an elongation of 30%. Preferably, R is <30%, and R_{2 hours} <50%.

More specifically, the non-elastomeric nature of the polymer is determined according to the following protocol:

a polymer film is prepared by pouring a solution of the polymer in a Teflon-coated mold and then drying for 7 days in a controlled environment at 23 ± 5 ° C and 50 ± 10% relative humidity.

We then obtain a film about 100 microns thick in which are cut rectangular specimens (for example a punch) of a width of 15 mm and a length of 80 mm.

It requires that sample to a tensile stress using a machine sold under the reference Zwick, under the same conditions of temperature and humidity for drying.

The specimens are pulled at a speed of 50 mm / min and the distance between the jaws is 50 mm, which corresponds to the initial length (Lo) of the test piece.

It determines the instantaneous recovery Ri as follows: - on the stretches of 30% specimen (ε_myx) that is to say, about 0.3 times its initial length (l₀) - The stress is released by applying a return speed equal to the tensile speed, ie 50 mm / min and measuring the residual of the specimen elongation percentage, after returning to zero constraint (ει). The% instantaneous recovery (Ri) is given by the following formula:

R | = (Εmaχ - εi) / ε_myχ) x 100

To determine the delayed recovery, measuring the residual elongation of the specimen as a percentage (ε_2n).

The% delayed recovery (R_{2 hours}) Is given by the following formula:

R₂h = (εmax - ε_{2 hours}) / Εmax) x 100

Purely as a polymer used according to one embodiment of the invention has an instantaneous recovery R, ​​10% and a delayed recovery R_2n 30%.

The polydispersity index I of the polymer is equal to the ratio of the average mass Mw to the number-average mass Mn.

the average molecular weights are determined by weight (Mw) and number (Mn) by liquid chromatography by gel permeation chromatography (THF solvent, calibration curve established with linear polystyrene standards, refractometric detector).

The weight-average mass (Mw) of the polymer used in the composition according to the invention is preferably less than or equal to 300 000, it is for example from 35 000 to 200 000 and better still from 45 000 to 150 000.

The number-average mass (Mn) of the polymer used in the composition according to the invention is preferably less than or equal to 70 000, it is for example from 10 000 to 60 000 and better still from 12 000 to 50 000.

The polydispersity index of the polymer used in the composition according to the invention is greater than 2, for example is greater than 2 and less than or equal to 9, from preferably greater than or equal to 2.5, for example ranging from 2.5 to 8 and better still greater than or equal to 2.8, in particular 2.8 to 6.

Each block of the block polymer used in the composition according to the invention is derived from one type of monomer or from several different types of monomer.

This means that each block may consist of a homopolymer or a copolymer; this copolymer constituting the block may be his turn random or alternating. Advantageously, the intermediate block comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block of the polymer is a random polymer.

Preferably, the intermediate block is derived essentially from constituent monomers of the first sequence and second sequence. By "substantially" means 85% at least, preferably at least 90%, more than 95% and even better still 100%.

Advantageously, the intermediate block has a glass transition temperature Tg between the glass transition temperatures of the first and second sequences.

The glass transition temperatures indicated for the first and second blocks may be theoretical Tg values ​​determined from the theoretical Tg values ​​of the constituent monomers of each of the sequences, which can be found in a reference manual such as the Polymer Handbook, 3^rd ed, 1989, John Wiley, according to the following relationship, known as Fox's law:

1 / Tg = Σ (σ, / ι Tg), ωj i being the mass fraction of the monomer i in the block under consideration and Tgi being the glass transition temperature of the homopolymer of the monomer i. Unless otherwise indicated, the Tg values ​​indicated for the first and second blocks in the present patent application are theoretical Tg.

Advantageously, the first and second polymer sequences are such that the difference between the glass transition temperatures of the first and second blocks is generally greater than 10 ° C, preferably greater than 20 ° C and better still greater than 30 ° C.

In particular, the first block may be chosen from: a) a sequence having greater than or equal to Tg 40 ° C, b) a block with a Tg of less than or equal to 20 ° C, c) a block with a Tg of between 20 and 40 ° C, and the second sequence chosen from a category a), b) or c) different from the first sequence.

Is meant in the present invention, the expression "between ... and ...", a range of values ​​which the terminals mentioned are excluded, and

"... To ..." and "from ... to ...", a range of values ​​whose terminals are included.

a) Block with a Tg of greater than or equal to 40 ° C

The block with a Tg of greater than or equal to 40 ° C for example a Tg ranging from 40 to 150 ° C, preferably greater than or equal to 50 ° C, for example ranging from 50 ° C to 120 ° C and better still greater or equal to 60 ° C, for example ranging from 60 ° C to 120 ° C.

The block with a Tg greater than or equal to 40 ° C may be a homopolymer or a copolymer. In the case where this block is a homopolymer, it is derived from monomer whose homopolymer has a glass transition temperature exceeding 40 ° C.

In the case where the first block is a copolymer, it may be totally or partially derived from one or more monomers, the nature and concentration are chosen such that the Tg of the resulting copolymer is greater than or equal to 40 ° C. The copolymer may for example include:

- Monomers whose homopolymer has a Tg of greater than or equal to 40 ° C, for example a Tg ranging from 40 to 150 ° C, preferably greater than or equal to 50 ° C, for example ranging from 50 ° C to 120 ° C and greater than or equal to 60 ° C, for example ranging from 60 ° C to 120 ° C, and

- Monomers whose homopolymer has a Tg less than 40 ° C, chosen from monomers whose homopolymer has a Tg of between 20 to 40 ° C and / or the monomers whose homopolymer has a Tg of less than or equal to 20 ° C, for example a Tg ranging from -100 to 20 ° C, preferably below 15 ° C, especially ranging from - 80 ° C to 15 ° C and preferably below 10 ° C, for example ranging from -50 ° C to 0 ° C, as described later.

The monomers whose homopolymer has a glass transition temperature exceeding 40 ° C are preferably chosen from the following monomers, also known as the main monomers:

- Methacrylates of formula CH₂ = C (CH₃) -COORι Wherein R represents an unsubstituted alkyl group, linear or branched, containing from 1 to 4 carbon atoms, such as methyl, ethyl, propyl or isobutyl group or R represents a cycloalkyl group C₄ to Cι₂,

- CH formula acrylates₂ = CH-COOR₂ wherein R₂ is cycloalkyl C₄ to Cι₂ as an isobornyl group or a tert-butyl group,

- (Meth) acrylamides of formula: <img id="imgf000013_0001" he="22" wi="56" file="imgf000013_0001.tif" img-format="tif" img-content="drawing" orientation="portrait" inline="no" />

wherein R₇ and R₈ identical or different, each represent a hydrogen atom or an alkyl group Ci-Cι₂ linear or branched, such as n-butyl, t-butyl, isopropyl, isohexyl, isooctyl or isononyl; or R₇ Rβ is H and represents a 1, 1-dimethyl-3-oxobutyl group, and R 'denotes H or methyl. Examples of monomers that may be mentioned include N-butylacrylamide, Nt-butylacrylamide, N-isopropylacrylamide, N, N-dimethylacrylamide and N, N-dibutylacrylamide,

- And mixtures thereof.

Particularly preferred main monomers are methyl methacrylate, (meth) acrylate, isobutyl (meth) isobornyl acrylate and mixtures thereof.

b) Block with a Tg less than or equal to 20 ° C.

The block with a Tg less than or equal to 20 ° C for example a Tg ranging from -100 to 20 ° C, preferably less than or equal to 15 ° C, especially ranging from - 80 ° C to 15 ° C and preferably less or equal to 10 ° C, for example ranging from -50 ° C to 0 ° C.

The block with a Tg less than or equal to 20 ° C may be a homopolymer or a copolymer. In the case where this block is a homopolymer, it is derived from monomers which are such (s) that the homopolymers prepared from these monomers have glass transition temperatures less than or equal to 20 ° C. This second block may be a homopolymer consisting of one type of monomer (for which the Tg of the corresponding homopolymer is less than or equal to 20 ° C).

In the case where the block with a lower or Tg at 20 ° C is a copolymer, it may be totally or partially derived from one or more monomers, the nature and concentration are chosen such that the Tg of the resulting copolymer is less than or equal to 20 ° C. It may for example comprise

- One or more monomers whose corresponding homopolymer has a Tg of less than or equal to 20 ° C, for example a Tg ranging from -100 ° C to 20 ° C, preferably below 15 ° C, especially ranging from - 80 ° C to 15 ° C and preferably below 10 ° C, for example ranging from -50 ° C to 0 ° C and

- One or more monomers whose corresponding homopolymer has a Tg greater than 20 ° C, such as monomers with a Tg of greater than or equal to 40 ° C, for example a Tg ranging from 40 to 150 ° C, preferably greater than or equal to 50 ° C, for example ranging from 50 ° C to 120 ° C and better still greater than or equal to 60 ° C, for example ranging from 60 ° C to 120 ° C and / or monomers with a Tg of between 20 and 40 ° C, as described above.

Preferably, the block with a Tg less than or equal to 20 ° C is a homopolymer.

The monomers whose homopolymer has a Tg of less than or equal to 20 ° C are preferably chosen from the following monomers, or main monomer:

- CH formula acrylates₂ = CHCOOR₃,

R₃ representing a substituted alkyl group at Cι₂Linear or branched, with the exception of the tert-butyl group, in which is (are) optionally intercalated (s) one or more heteroatoms selected from O, N, S, - Methacrylates of formula CH₂ = C (CH₃) COOR₄,

R₄ representing a substituted alkyl C₆ to Cι₂ linear or branched, in which is (are) optionally intercalated (s) one or more heteroatoms selected from 0, N and S;

- A formula of vinyl esters₅-CO-O-CH = CH₂ wherein R₅ is alkyl C₄ -C-ι₂ straight or branched;

- Vinyl alkyl ethers with C Cι₂Such as vinyl methyl ether and vinyl ethyl ether.

- N-alkyl C₄ to d₂ acrylamides, such as N-octylacrylamide,

- And mixtures thereof.

Particularly preferred main monomers for the block with a Tg less than or equal to 20 ° C are alkyl acrylates whose alkyl chain contains from 1 to 10 carbon atoms, except the tert-butyl group, such as acrylate methyl acrylate, isobutyl acrylate, 2-ethylhexyl and mixtures thereof.

c) Block with a Tg of between 20 and 40 ° C.

The sequence which has a Tg of between 20 and 40 ° C may be a homopolymer or a copolymer.

In the case where this block is a homopolymer, it is derived from monomers (or main monomer) whose homopolymer has a glass transition temperature between 20 and 40 ° C.

The monomers whose homopolymer has a glass transition temperature between 20 and 40 ° C are preferably chosen from methacrylate n-butyl acrylate, cyclodecyl acrylate, neopentyl isodecylacrylamide and mixtures thereof.

In the case where the block with a Tg of between 20 and 40 ° C is a copolymer, it is totally or partially derived from one or more monomers (or main monomer) whose nature and concentration are chosen such that the Tg of the resulting copolymer is between 20 and 40 ° C.

Advantageously, the block with a Tg of between 20 and 40 ° C is a copolymer outcome in whole or in part:

- Main monomers whose corresponding homopolymer has a Tg of greater than or equal to 40 ° C, for example a Tg ranging from 40 ° C to 150 ° C, preferably greater than or equal to 50 ° C, for example ranging from 50 to 120 ° C and better still greater than or equal to 60 ° C, for example ranging from 60 ° C to 120 ° C, as described above, and

- Main monomers whose corresponding homopolymer has a Tg less than or equal to 20 ° C, for example a Tg ranging from -100 to 20 ° C, preferably less than or equal to 15 ° C, especially ranging from -80 ° C at 15 ° C and preferably less than or equal to 10 ° C, for example ranging from -50 ° C to 0 ° C, as described above, the said monomers being chosen such that the Tg of the copolymer forming the first block is between 20 and 40 ° C.

Such main monomers are chosen, for example methyl methacrylate, acrylate and methacrylate isobornyl acrylate, butyl acrylate, 2-ethylhexyl and mixtures thereof.

Preferably, the proportion of the second block with a Tg less than or equal to 20 ° C is from 10 to 85% by weight of the polymer, more preferably from 20 to 70% and more preferably 20 to 50%.

According to one embodiment, the block polymer used in the composition according to the invention is free of styrene. By free polymer, styrene, one means a polymer comprising less than 10%, preferably less than 5%, preferably less than 2%, more preferably less than 1% by weight, or does not contain, styrenic monomer such as styrene or styrene derivatives such as methylstyrene, chlorostyrene or chloromethylstyrene.

According to one embodiment, the block polymer of the composition according to the invention is derived from aliphatic ethylenic monomers. Aliphatic monomer means a monomer comprising no aromatic groups.

Each of the blocks may contain in small proportion at least one constituent monomer of the other sequence.

Thus, the first block may contain at least one constituent monomer of the second block, and vice versa.

Each of the first and / or second blocks (Fri) comprise, in addition to the monomers indicated above, one or more other monomers known as additional monomers, different from the main monomers mentioned above. The nature and amount of this or these additional monomer are chosen so that the sequence in which they are present has the desired glass transition temperature.

This additional monomer is chosen, for example: hydrophilic monomers such as:

- Unsaturated monomers (s) ethylenic (s) comprising at least one carboxylic or sulfonic acid function, for instance: acrylic acid, methacrylic acid, crotonic acid, maleic anhydride, itaconic acid, fumaric acid, maleic acid, acrylamidopropanesulfonic acid, vinylbenzoic acid, vinylphosphoric acid and the salts thereof,

- Unsaturated monomers (s) ethylenic (s) comprising at least one tertiary amine function, for instance 2-vinylpyridine, 4-vinylpyridine, methacrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate and dimethylaminopropylmethacrylamide, and salts thereof,

- Methacrylates of formula CH₂ = C (CH₃) COOR₆ wherein R₆ represents a linear or branched alkyl group containing from 1 to 4 carbon atoms, such as methyl, ethyl, propyl or isobutyl group, said alkyl group being substituted by one or more substituents chosen from hydroxyl groups (such as methacrylate 2-hydroxypropyl methacrylate 2-hydroxyéthyIe) and halogen atoms (Cl, Br, I, F), such as trifluoroethyl methacrylate, - methacrylates of formula CH₂ = C (CH₃) COOR₉,

R_g Representative alkyl it to C-ι₂ linear or branched, in which is (are) optionally intercalated (s) one or more heteroatoms selected from 0, N and S, said alkyl group being substituted by one or more substituents chosen from hydroxyl groups and halogen atoms ( Cl, Br, I, F); - CH formula acrylates₂ = CHCOOR₁₀,

Rio representing an alkyl group with Cι₂ linear or branched substituted by one or more substituents chosen from hydroxyl groups and halogen atoms (Cl, Br, I and F), such as acrylate, 2-hydroxypropyl and 2-hydroxyethyl acrylate, or R represents an alkyl (Cι-Cι) O-POE (polyoxyethylene) with repetition of the oxyethylene unit 5 to 30 times, for example methoxy-POE, or R represents a polyoxyethylene group comprising from 5 to 30 ethylene oxide units

b) ethylenically unsaturated monomers comprising one or more silicon atoms, such as methacryloxypropyltrimethoxysilane trimethoxy silane, methacryloxypropyl tris (trimethylsiloxy) silane,

- And mixtures thereof.

Particularly preferred additional monomers are acrylic acid, methacrylic acid, trifluoroethyl methacrylate and mixtures thereof.

This or these additional monomers represent (s) generally a less than or equal to 30% by weight, for example from 1 to 30% by weight, preferably 5 to 20% by weight and, more preferably, 7 to 15% by weight of the total weight of the first and / or second blocks.

According to a preferred embodiment, the polymer used in the composition according to the invention is a non-silicone polymer, i.e. a polymer free of silicon atoms.

Preferably, each of the first and second blocks comprises at least one monomer selected from esters of (meth) acrylic acid as defined above, and optionally a monomer selected from (meth) acrylic acid, and mixtures thereof.

Advantageously, each of the first and second blocks is totally derived from at least one monomer selected from esters of (meth) acrylic acid as defined above, and optionally a monomer selected from (meth) acrylic acid, and their mixtures thereof.

The polymer used in the composition according to the invention can be obtained by radical solution polymerization according to the following preparation process: a portion of the polymerization solvent is introduced into a suitable reactor and heated until the adequate temperature for the polymerization ( typically between 60 and 120 ° C), once this temperature is reached, the constituent monomers of the first block are introduced in the presence of a portion of the polymerization initiator, after a time T corresponding to a conversion rate maximum of 90%, the constituent monomers of the second block and the rest of the initiator are introduced, are allowed to react for a time T '(ranging from 3 to 6 hours) after which the mixture is brought to room temperature, the polymer is obtained in solution in the polymerization solvent.

By polymerization solvent is meant a solvent or solvent mixture. The polymerization solvent may be chosen especially from ethyl acetate, butyl acetate, alcohols such as isopropanol, ethanol, alkanes aliphatic such as isododecane and mixtures thereof. Preferably, the polymerization solvent is a mixture of butyl acetate and isopropanol, or isododecane.

According to a first embodiment, the polymer used in the composition according to the invention comprises at least one (especially one) first block with a Tg of greater than or equal to 40 ° C, as described above in a) and at least one (especially one) second block with a Tg less than or equal to 20 ° C, as described above in b).

Preferably, the first block with a Tg greater than or equal to 40 ° C is a copolymer derived from monomers whose homopolymer has a glass transition temperature exceeding 40 ° C, such as the monomers described above. Advantageously, the second block with a Tg less than or equal to 20 ° C is a homopolymer, especially derived monomer as described above.

Preferably, the proportion of the block with a Tg greater than or equal to 40 ° C is from 20 to 90% by weight of polymer, preferably from 30 to 80% and more preferably 50 to 70%.

Preferably, the proportion of the block with a Tg less than or equal to 20 ° C is from 5 to 75% by weight of polymer, preferably from 15 to 50% and better still from 25 to 45%.

Thus, in a first variant, the polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example having a Tg ranging from 70 to 110 ° C, which is a methacrylate copolymer, methyl methacrylate / acrylic acid,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from 0 to 20 ° C, which is a methyl acrylate homopolymer, and - An intermediate block which is a methyl methacrylate copolymer / acrylic acid / methyl acrylate.

In a second embodiment, the polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example ranging from 70 to 100 ° C, which is a methacrylate copolymer, methyl methacrylate / acrylic acid / trifluoroethyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from 0 to 20 ° C, which is a methyl acrylate homopolymer, and

- An intermediate block which is a random copolymer of methyl methacrylate / acrylic acid / methyl acrylate / trifluoroethyl methacrylate.

In a third variant, the polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example ranging from 85 to 115 ° C, which is an isobornyl acrylate / isobutyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from -85 to -55 ° C, which is a homopolymer of acrylate 2-ethylhexyl and

- An intermediate block which is an isobornyl acrylate random copolymer / isobutyl methacrylate / acrylate, 2-ethylhexyl.

In a fourth variant, the polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example ranging from 85 to 115 ° C, which is an isobornyl acrylate / methyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from -85 to -55 ° C, which is a homopolymer of acrylate 2-ethylhexyl and

- An intermediate block which is an isobornyl acrylate random copolymer / methyl methacrylate / acrylate, 2-ethylhexyl. According to a fifth variant, the polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example ranging from 95 to 125 ° C, which is an isobornyl acrylate / isobornyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from -85 to -55 ° C, which is a homopolymer of acrylate 2-ethylhexyl and

- An intermediate block which is a random copolymer of isobornyl acrylate / isobornyl methacrylate / acrylate, 2-ethylhexyl.

According to a sixth variant, the. polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example ranging from 85 to 115 ° C, which is a copolymer of isobornyl methacrylate / isobutyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from -35 to -5 ° C, which is an isobutyl acrylate homopolymer and

- An intermediate block which is a random copolymer of isobornyl methacrylate / isobutyl methacrylate / isobutyl acrylate.

According to a seventh variant, the polymer used in the composition according to the invention may comprise:

- A first Tg of greater than or equal to 40 ° C, for example ranging from 95 to 125 ° C, which is an isobornyl acrylate / isobornyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from -35 to -5 ° C, which is an isobutyl acrylate homopolymer and

- An intermediate block which is a random copolymer of isobornyl methacrylate / isobornyl methacrylate / isobutyl acrylate.

According to an eighth variant, the polymer used in the composition according to the invention may comprise: - A first Tg of greater than or equal to 40 ° C, for example ranging from 60 to 90 ° C, which is an isobornyl acrylate / isobutyl methacrylate,

- A second sequence Tg of less than or equal to 20 ° C, for example ranging from -35 to -5 ° C, which is an isobutyl acrylate homopolymer and

- An intermediate block which is an isobornyl acrylate random copolymer / isobutyl methacrylate / isobutyl acrylate.

According to a second embodiment, the polymer used in the composition according to the invention comprises at least one (especially one) first block with a glass transition temperature (Tg) of between 20 and 40 ° C, according to the blocks described in c ) and at least one (especially one) second block with a glass transition temperature of ≤ 20 ° C, as described above in b) or a glass transition temperature exceeding 40 ° C, as described in a) above.

Preferably, the proportion of the first block with a Tg of between 20 and 40 ° C is from 10 to 85% by weight of polymer, preferably from 30 to 80% and even better still from 50 to 70%.

When the second sequence is a sequence having greater than or equal to Tg 40 ° C, it is preferably present in a proportion ranging from 10 to 85% by weight of polymer, preferably from 20 to 70% and better still from 30 to 70 %.

When the second sequence is a sequence having less than or equal to Tg 20 ° C, it is preferably present in a proportion ranging from 10 to 85% by weight of polymer, preferably from 20 to 70% and better still from 20 to 50 %.

Preferably, the first sequence ayant- a Tg of between 20 and 40 ° C is a copolymer derived from monomers which are such (s) that the corresponding homopolymer has a Tg of greater than or equal to 40 ° C and from monomers which are such (s) that the corresponding homopolymer has a Tg of less than or equal to 20 ° C. .Avantageusement, The second block with a Tg less than or equal to 20 ° C or having a Tg greater than or equal to 40 ° C is a homopolymer.

Thus, according to first variant of this second embodiment, the polymer used in the composition according to the invention may comprise: - a first Tg sequence between 20 and 40 ° C, for example with a Tg of 25-39 ° C , which is a copolymer comprising at least one methyl acrylate monomer, at least one methacrylate monomer of methyl and at least one acrylic acid monomer, - a second Tg of greater than or equal to 40 ° C, for example ranging from 85 and 125 ° C, which is a homopolymer composed of methyl methacrylate monomers and

- An intermediate block comprising at least one methyl acrylate monomer, methacrylate and methyl - an intermediate block comprising methyl methacrylate, at least one acrylic acid monomer and at least one methyl acrylate monomer.

According to a second variant of this second embodiment, the polymer used in the composition according to the invention may comprise: - a first Tg sequence between 20 and 40 ° C, for example with a Tg of 21-39 ° C, which is a copolymer comprising isobornyl acrylate / isobutyl methacrylate / acrylate, 2-ethylhexyl,

- A second sequence of less than or equal to Tg 20 ° C, for example ranging from -65 to -35 ° C, which is a methyl methacrylate homopolymer, and - an intermediate block which is an isobornyl acrylate random copolymer / methacrylate isobutyl acrylate / 2-ethyl hexyl.

In a third variant of this second embodiment, the polymer used in the composition according to the invention may comprise: - a first Tg sequence between 20 and 40 ° C, for example with a Tg of 21-39 ° C, which is an isobornyl acrylate / methyl acrylate / acrylic acid, - A second block with a Tg isupérieure or equal to 40 ° C, for example ranging from 85 to 115 ° C, which is an acrylate homopolymer of isobornyl

- An intermediate block which is an isobornyl acrylate random copolymer / methyl acrylate / acrylic acid.

The block polymer described above can be present in the composition according to the invention in a content ranging from 0.1% to 90% by weight, relative to the total weight of the composition, preferably ranging from 0.5% to 50% by weight and preferentially ranging from 0.5% to 30% by weight.

The plasticizer present in the composition according to the invention may be a compound whose nature and amount are such that the composition is capable of forming a film having a hardness less than or equal to 35 seconds, the hardness of the film being measured at the using a Persoz pendulum according to the NF-T-30-016.

Also, according to one embodiment of the invention, the composition comprises a block polymer as described above and a plasticizer, the nature and amount are such that the composition is capable of forming a film having a hardness less than or equal to 35 seconds, the hardness of the film being measured using a Persoz pendulum according to standard NF-T-30-016.

The hardness of film is measured for a layer of 300 .mu.m thickness (before drying) is deposited on a glass plate heated to 30 ° C and after drying, for 23 hours at ambient atmosphere for 1 hour then at 70% relative humidity for a composition in a solvent medium or 50% relative humidity for a composition in aqueous medium. The hardness of the film obtained is measured according to ASTM D-43-66 or standard NF-T 30-016 (December 1991), using a Persoz pendulum.

Advantageously, the composition according to the invention is capable of forming a film having a hardness less than or equal to 35 seconds, in particular from 8 to 35 seconds, preferably less than or equal to 30 seconds, in particular from 10 to 30 seconds, and preferably less than or equal to 25 seconds, particularly from 12 to 25 seconds.

The plasticizer present in the composition according to the invention may be a compound having a solubility parameter δ_h from 5.5 to 11 (J / cm³)^1/2.

Also, according to one embodiment of the invention, the composition comprises a block polymer as described above and a plasticizer which is a compound having a solubility parameter δ_h from 5.5 to 11 (J / cm³)¹⁷².

The plasticizer present in the composition according to the invention may be a compound having a solubility parameter δ_h from 5.5 to 11 (J / cm³)^1/2, Preferably from 5.5 to 11 and preferably ranging from 5.9 to 11, preferably from 7 to 10.5, preferably from 9 to 10, more preferably ranging from 8 to 10 (J / cm³)¹⁷².

Preferably, the plasticizer compound has a solubility parameter Ap from 1 5 to 4,5 (J / cm), preferably ranging from 1, 5 to 4 (J / cm), preferably from

1, from 5 to 3,5 (J / cm³)¹⁷², More preferably from 2 to 3 (J / cm³)¹⁷².

The plasticizer is preferably liquid at ambient temperature and pressure ι atmospheric.

The definition of solubility parameters according to Hansen is well known to those skilled in the art and particularly described in the article by CM Hansen: "The three dimensional solubility parameters" J. Paint Technol. 39, 105 (1967). These parameters are also described in JP-A-08-109121 KAO document and the document DW Van Krevelen "Properties of polymers" (1990), p. 190.

According to this Hansen space:

- Ap characterized the forces of Debye interactions between permanent dipoles; and

- δ_h characterizes the specific interaction forces (such as hydrogen bonding, acid / base, donor / acceptor, etc.); The parameters δ_P and δ_h are generally expressed in (J / cm³)¹⁷². They are determined at room temperature (25 ° C) and in particular according to the calculation method indicated in document Kao patent above.

In the composition according to the invention, one can use a mixture of compounds satisfying the above relationships. In this case, the mixture solubility parameters are determined from those of the compounds taken separately, according to the following relationships:

δpmel = Σ Xi δ_pand j = Σ Xi δhmel δhj

where xi represents the volume fraction of compound (i) in the mixture.

It is within the reach of the skilled person to determine the amounts of each compound to obtain a mixture of compounds having the relationship above.

Preferably, the plasticizer has a molecular weight less than or equal to 5000 g / mol, preferably less than or equal to 2000 g / mol, preferably less than or equal to 1000 g / mol, more preferably less than or equal to 900 g / mol . The plasticizer preferably has a molecular weight greater than or equal to 100 g / mol.

Advantageously, the plasticizer used in the invention is an ester.

According to a first embodiment of the composition according to the invention, the plasticizer can be chosen from esters of at least one carboxylic acid comprising 1 to 7 carbon atoms and of a polyol comprising at least 4 hydroxyl groups. Also, the invention relates to a composition comprising a block polymer as described above and a plasticizer selected from esters of at least one carboxylic acid comprising 1 to 7 carbon atoms and of a polyol comprising at least 4 hydroxyl groups, said ester having a molecular weight less than 5000 g / mol.

The polyol of the invention may be a monosaccharide - polyhydroxyaldéhyde (aldose) or polyhydroxycétone (ketosis) - cyclized or not. The polyol is preferably a saccharide cyclized form of hemiacetal.

From aldoses include D-ribose, D-xylose, L-arabinose, D-glucose (or alpha-D-glucopyranose when in the form of cyclic hemiacetal), D mannose, and D-galactose.

Among ketoses include D-xylulose and D-fructose (or beta-D-fructofuranose when in the form of cyclic hemiacetal).

The polyol may be a mono- or polysaccharide comprising from 1 to 10 saccharides, preferably 1 to 4, more preferably one or two oses. The polyol may be selected from erythritol, xylitol, sorbitol, glucose, sucrose, lactose, maltose.

The polyol according to the invention is preferably a disaccharide. From disaccharides include sucrose (also known as alpha-D-glucopyranosyl (1-2) -beta-D-fructofuranose), lactose (also called beta-D-galactopyranosyl- (1-4) -beta- D-glucopyranose) and maltose (also known as alpha-D-glucopyranosyl (1-4) -beta-D-glucopyranose), and preferably sucrose.

The polyol may be a polysaccharide consisting of more identical saccharides or two or more different saccharides. The ester according to the invention may comprise a polyol esterified by at least two different monocarboxylic acids, or by at least three different monocarboxylic acids.

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

The carboxylic acid is preferably a monocarboxylic acid comprising 1 to 7 carbon atoms, preferably from 1 to 5 carbon atoms, for example chosen from acetic, n-propanoic, isopropanoic, n-butanoic, isobutanoic, tertiobutanoïque , n-pentanoic acid and benzoic acid.

The ester may be obtained from at least two different monocarboxylic acids. According to one embodiment, the acid is a linear or branched unsubstituted acid.

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

According to one preferred implementation, the ester is diacetate hexa (2-methyl propanoate) sucrose, such as that sold under the name "Sustane SAIB Food Grade Kosher" by Eastman Chemical.

According to a second embodiment of the composition according to the invention, the plasticizer may be selected from esters of aliphatic or aromatic polycarboxylic acid and aliphatic or aromatic alcohol comprising from 1 to 10 carbon atoms.

Also, the invention relates to a composition comprising a block polymer as described above and a plasticizer selected from esters of aliphatic or aromatic polycarboxylic acid and aliphatic or aromatic alcohol comprising from 1 to 10 carbon atoms. The aliphatic or aromatic alcohol contains from 1 to 10 carbon atoms, preferably 1 to 8, for example from 1 to 6. It may be selected from R 1 OH alcohols, such that R1 represents methyl, ethyl, propyl, isopropyl, butyl, hexyl, ethylhexyl, decyl, isodecyl, benzyl, or benzyl substituted by alkyl of 1 to 3 carbon atoms, and mixtures thereof.

The aliphatic or aromatic polycarboxylic acid comprises preferably from 3 to 12 carbon atoms, preferably 3 to 10 carbon atoms, preferably 3 to 8 carbon atoms, for example 6 or 8 carbon atoms.

The aliphatic or aromatic polycarboxylic acid is preferably chosen from dicarboxylic acids and tricarboxylic acids.

Among the aliphatic dicarboxylic acids include those of the formula HOOC- (CH2) n -COOH, wherein n is an integer ranging from 1 to 10, preferably from 2 to 8, for example equal to 2, 4, 6 or 8. preferred are dicarboxylic acids selected from I succinic acid, adipic acid and sebacic acid.

Among the aromatic dicarboxylic acids include phthalic acid.

Among the tricarboxylic acids include triacids which correspond to the formula

<img id="imgf000030_0001" he="26" wi="29" file="imgf000030_0001.tif" img-format="tif" img-content="drawing" orientation="portrait" inline="no" /> wherein R represents an -H group, -OH or -OCOR 'wherein R' represents an alkyl group having 1 to 6 carbon atoms. Preferably, R represents an -OCOCH3 group.

The tricarboxylic acid is in particular chosen from acetyl-citric acid, butyroyl-citric acid, citric acid.

Among the tricarboxylic acid esters, can be used ester derivatives of citric acid (or citrates) such as acetyl tributyl citrate, acetyl triethyl citrate, acetyl citrate triéthylhexyle, the acetyl citrate trihexyl citrate butyroyl- trihexyl citrate, triisodecyl citrate, triisopropyl citrate, tributyl citrate and tri (2-ethylhexyl).

Among the esters of adipic acid include dibutyl adipate and diisopropyl adipate (2-ethyl-hexyl).

Among the esters of sebacic acid, there may be mentioned dibutyl sebacate, sebacate, di (2-ethyl-hexyl), diethyl sebacate and diisopropyl sebacate.

Among the esters of succinic acid, may be mentioned di succinate (2-ethylhexyl) and diethyl succinate.

Among the esters of phthalic acid include phthalate, butyl benzyl, dibutyl phthalate, diethylhexyl phthalate, diethyl phthalate and dimethyl phthalate.

The plasticizer preferably includes no polar group other than the ester group, and in particular contains no hydroxyl group. The "polar groups" are, for example ionic or nonionic polar groups chosen from -COOH; -OH ; ethylene oxide; propylene oxide; -PO₄ ; NHR; -NRιR₂ with R, R₂ representing an alkyl radical or alkoxy -C₂₀. Which may be linear, branched or cyclic. Advantageously, the block polymer and the plasticizer can be present in the composition in a content such that the weight ratio between the block polymer and the plasticizer is between 0.5 and 100, preferably between 1 and 50, preferably between 1 and 10, more preferably between 1 to 5.

According to a particularly preferred embodiment, the organic liquid medium of the composition contains at least one organic liquid which is the or one of organic solvent (s) polymerization of the block polymer as described above. Advantageously, said organic polymerization solvent is the major organic liquid by weight in the organic liquid medium of the cosmetic composition.

The composition according to the invention may further comprise at least one volatile oil.

"Oil" means any non-aqueous liquid at room temperature (25 ° C) and atmospheric pressure (760 mmHg), compatible with application to the skin, mucous membranes (lips) and / or the skin appendages (nails, eyelashes, eyebrows, hair).

Volatile oils, any non-aqueous medium capable of evaporating from the skin or the lips in less than one hour, especially having a vapor pressure at room temperature and atmospheric pressure ranging from 10^'3 to 300 mmHg (0.13 Pa to 40 000 Pa).

According to the invention, one can use one or more volatile oils.

These oils may be hydrocarbon-based or silicone oils optionally comprising alkyl or aikoxy pendent or at the end of a silicone chain. By hydrocarbon oil means an oil formed essentially, indeed even composed, of carbon and hydrogen and optionally oxygen, nitrogen, and containing no silicon or fluorine atom. It may contain alcohol, ester, ether, carboxylic acid, amine and / or amide.

As volatile silicone oil in the invention include linear or cyclic silicones having from 2 to 7 silicon atoms, these silicones optionally comprising alkyl or aikoxy groups having 1 to 10 carbon atoms. As volatile silicone oil in the invention, mention may be made of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptaméthylhexyltri siloxane, heptamethyloctyltrisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and mixtures thereof.

As other volatile oil used in the invention, especially preferred isoparaffins C₈-This₆ as isododecane, isodecane isohexadecane and for example the oils sold under the trade names Isopar and Permethyl, and especially isododecane (Permethyl 99 A).

The volatile oil may be present in the composition according to the invention in a content ranging from 0.1% to 90% by weight, relative to the total weight of the composition, preferably ranging from 1% to 70% by weight, and preferentially ranging from 5% to 50% by weight.

The composition according to the invention may comprise a non-volatile oil.

The term non-volatile oil an oil capable of remaining on the skin at room temperature (25 ° C) and atmospheric pressure at least an hour and that especially has a vapor pressure at room temperature (25 ° C) and atmospheric pressure, not zero less than 0.01 mm Hg (1, 33 Pa).

The non-volatile oil may be chosen from silicone or hydrocarbon-based non-volatile oils. By hydrocarbon oil means an oil formed essentially, indeed even composed, of carbon and hydrogen and optionally oxygen, nitrogen, and containing no silicon or fluorine atom. It may contain alcohol, ester, ether, carboxylic acid, amine and / or amide.

The non-volatile oil may be chosen from non-volatile oils apolar, polar non-volatile oils, and mixtures thereof.

The non-volatile oil may be present in the composition according to the invention in a content ranging from 0.1% to 20% by weight, relative to the total weight of the composition, preferably ranging from 1% to 15% by weight and preferentially ranging from 1% to 10% by weight.

Non-volatile oil used in the invention include:

- Hydrocarbon-based non-volatile oils such as liquid paraffin (or vaseline), squalane, hydrogenated polyisobutylene (Parleam oil), perhydrosqualene, mink oil, turtle oil, soybean oil, oil of sweet almond oil, beauty-leaf oil, palm oil, grapeseed oil, sesame oil, corn oil, arara oil, rapeseed, sunflower, cottonseed oil, apricot oil, castor oil, avocado oil, jojoba oil, olive or cereal germ oil; of the lanolin acid esters, oleic acid, lauric acid, stearic acid; fatty esters, particularly C12-C36. such as isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, palmitate, 2- ethylhexyl laurate 2-hexyl decyl palmitate, 2-octyl-decyl myristate or lactate, 2-octyldodecyl, succinate, di (2-ethylhexyl), diisostearyl malate, isostearate sorting glycerin or diglycerol; higher fatty acids, especially C14-C22. such as myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid or isostearic acid; higher fatty alcohols, particularly C22 G16-. such as cetanol, oleyl alcohol, linoleic or linolenic acids, isostearyl alcohol or octyldodecanol; and mixtures thereof. - Non-volatile silicone oils such as polydimethylsiloxanes (PDMS) non-volatile; polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, pendent or at the end of a silicone chain, these groups containing from 2 to 24 carbon atoms; phenylsilicones as phenyltrimethicones, phenyl dimethicones, phenyl trimethylsiloxy, diphenyl dimethicone, diphenylmethyldiphenyltrisiloxanes; polysiloxanes modified with fatty acids (especially of Cβ- C20). fatty alcohols (especially of C 8 -C 20) or polyoxyalkylenes (especially polyoxyethylene and / or polyoxypropylene); aminosilicones; silicones containing hydroxyl groups; fluorinated silicones containing a fluorinated group that is pendent or at the silicone chain having from 1 to 12 carbon atoms, all or part of hydrogen are substituted by fluorine atoms; and mixtures thereof

Advantageously, the non-volatile hydrocarbon oil is chosen from hydrocarbons especially alkanes such as hydrogenated polyisobutene.

The composition may comprise, besides the block polymer described above according to the invention, an additional polymer such as a film-forming polymer. According to the present invention, the term "film-forming polymer" means a polymer capable, by itself or in the presence of an auxiliary film-forming agent, a continuous film that adheres to a support, especially to keratin materials. Among the film-forming polymers used in the composition of the present invention, synthetic polymers include, of radical type or of polycondensate type, natural polymers and mixtures thereof. Film-forming polymers which may be mentioned in particular acrylic polymers, polyurethanes, polyesters, polyamides, polyureas and cellulose polymers such as nitrocellulose.

The composition according to the invention may also comprise at least solid fat at room temperature, especially chosen from waxes, fats pasty, gums and mixtures thereof. These fatty substances may be of animal, plant, mineral or synthetic.

By wax in the sense of the present invention, means a lipophilic compound that is solid at room temperature (25 ° C), with reversible solid / liquid reversible, having a melting point up to 30 ° C up until to 120 ° C. The melting point of the wax may be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name DSC 30 by the company Mettler. The waxes can be hydrocarbon, fluorinated and / or silicone and may be of plant, mineral, animal and / or synthetic. In particular, the waxes have a melting point greater than 25 ° C and greater than 45 ° C. As waxes used in the composition of the invention include beeswax, carnauba wax or candelilla wax, paraffin, microcrystalline waxes, ceresin or ozokerite; synthetic waxes such as polyethylene waxes or Fischer-Tropsch, silicone waxes such as alkyl or alkoxy dimethicones containing from 16 to 45 carbon atoms. The gums are generally polydimethylsiloxanes (PDMS) of high molecular weight or cellulose gums or polysaccharides and the pasty substances are generally hydrocarbon compounds such as lanolin and derivatives thereof, or PDMS.

The nature and quantity of the solid substances depend on the mechanical properties and textures. As a guide, the composition may contain from 0.1 to 50% by weight of waxes, relative to the total weight of the composition and better still from 1 to 30% by weight.

The composition according to the invention may further comprise one or more dyestuffs chosen from water-soluble dyes and pulverulent coloring materials such as pigments, pearlescent agents and glitter well known in the art. The dyestuffs may be present in the composition in a content ranging from 0.01% to 50% by weight, based on the weight of the composition, preferably from 0.01% to 30% by weight. Pigments should be understood particles of any shape, white or colored, mineral or organic, insoluble in the physiological medium, intended to color the composition.

Pearlescent agents should be understood to mean iridescent particles of any form, especially produced by certain mollusks in their shell or synthesized.

The pigments can be white or colored, inorganic and / or organic. These include, among inorganic pigments, titanium dioxide, optionally surface-treated, zirconium oxide or cerium oxide, and also zinc oxide, iron oxide (black, yellow or red) or chromium, violet manganese, ultramarine blue, chromium hydrate and ferric blue, and metal powders such as aluminum powder, copper powder.

Among the organic pigments, carbon black include, type of the D &amp; C pigments, and lakes based on cochineal carmine, barium, strontium, calcium and aluminum.

It may also be made ​​of effect pigments, such as particles comprising an organic or inorganic substrate, natural or synthetic, glass, resins crylique, polyester, polyurethane, polyethylene terephthalate, ceramics or aluminas, the said substrate being coated with metallic substances such as aluminum, gold, silver, platinum, copper, bronze, or metal oxides such as titanium dioxide, iron oxide, oxide chromium and mixtures thereof.

The pearlescent pigments can be chosen from white pearlescent pigments such as mica coated with titanium or with bismuth oxychloride, colored pearlescent pigments such as titanium mica coated with iron oxides, titanium mica coated especially with blue iron or chromium oxide, titanium mica coated with an organic pigment of the abovementioned type, and pearlescent pigments based on bismuth oxychloride. . One can also use interference pigments, in particular liquid crystal or multilayer. Water-soluble dyes are for example beetroot juice, methylene blue.

The composition according to the invention may additionally comprise one or more fillers, especially in a content ranging from 0.01% to 50% by weight, based on the total weight of the composition, preferably ranging from 0.01% to 30% by weight. By fillers are meant particles of any shape, colorless or white, inorganic or synthetic, insoluble in the medium of the composition irrespective of the temperature at which the composition is manufactured. These fillers serve especially to modify the rheology or texture of the composition.

The fillers may be mineral or organic of any shape, platelet, spherical or oblong, whatever the crystallographic form (for example sheet, cubic, hexagonal, orthorhombic, etc.). Include talc, mica, silica, kaolin, polyamide powders (Nylon®) (Orgasol® from Atochem), poly-β-alanine and polyethylene, tetrafluoroethylene polymer powders (Teflon® ) lauroyllysine, starch, boron nitride, hollow polymer microspheres such as those of polyvinylidene chloride / acrylonitrile, Expancel® (Nobel Industrie), acrylic acid copolymers (Polytrap® of Dow Corning) and silicone resin microbeads (Tospearls® from Toshiba, for example), elastomeric polyorganosiloxane particles, precipitated calcium carbonate, magnesium carbonate and hydrogen carbonate, hydroxyapatite, the microspheres hollow silica (silica Beads® from Maprecos), glass microcapsules or ceramic, and metal soaps derived from organic carboxylic acids having 8 to 22 carbon atoms, preferably 12 to 18 carbon atoms, e.g. zinc stearate, magnesium or lithium, zinc laurate or magnesium myristate.

The composition according to the invention may also contain ingredients commonly used in cosmetics, such as vitamins, thickeners, trace elements, softeners, sequestering agents, fragrances, basifying or acidifying agents, preservatives, sunscreens , surfactants, antioxidants, anti hair-loss agents, anti-dandruff agents, propellants, or mixtures thereof.

Of course, the skilled care to select this or these optional additional compounds and / or their quantity, such that the advantageous properties of the corresponding composition according to the invention are not, or not substantially impaired by addition envisaged.

The composition according to the invention may especially be in the form of suspension, dispersion, solution, gel, emulsion, including oil-in-water (O / W) or water-in-oil (W / O ), or multiple (W / O / W or polyol / O / W or O / W / O), as a cream, paste, foam, dispersion of vesicles, especially of ionic or nonionic lipids, two-phase lotion or multiphase, spray, powder, a paste, especially a soft paste (in particular paste having a dynamic viscosity at 25 ° C of the order of 0.1 to 40 Pa.s at a shear rate of 200 s^"1After 10 minutes geometry measurement cone / plate). The composition may be anhydrous, for example it may be a stick or an anhydrous paste. The composition may be a leave-in composition.

The skilled person may select the appropriate dosage form and its method of preparation, on the basis of his general knowledge, taking into account both the nature of the constituents used, especially their solubility in the support, and secondly to the application envisaged for the composition.

According to another aspect, the invention also relates to a cosmetic assembly comprising: i) a container delimiting at least one compartment, said container being closed by a closing member; and ii) a composition placed inside the said compartment, the composition being in accordance with inevention. The container can be in any suitable form. It may especially be in the form of a bottle, a tube, a jar, a case, a box, a sachet or a carton.

The closing member may be in the form of a removable stopper, a lid, a cover, a tear-off strip or a capsule, especially of the type comprising a body fixed to the container and a cap articulated on the body. It can also be in the form of a élémeht for selectively closing the container, especially a pump, a valve or a flap valve.

The container may be combined with an applicator, especially in the form of a brush comprising an arrangement of bristles maintained by a twisted wire. Such a twisted brush is described especially in patent US 4 887 622. It may also be in the form of a comb comprising a plurality of application members, obtained especially by molding. Such combs are described for example in patent FR 2 796 529. The applicator may be in the form of a brush, as described for example in patent FR 2 722 380. The applicator may be in the form of a block of foam or of elastomer, a felt or a spatula. The applicator may be free (tuft or sponge) or securely fastened to a rod borne by the closing member, as described for example in US Patent 5 492 426. The applicator may be secured to the receptacle, as described for example FR 2761959.

The product may be contained directly in the container, or indirectly. For example, the product may be arranged on an impregnated support, especially in the form of a wipe or a pad, and arranged (individually or in plurality) in a box or in a sachet. Such a support incorporating the product is described for example in patent application WO 01/03538.

The closing member may be coupled to the container by screwing. Alternatively, the coupling between the closing member and the container is done other than by screwing, especially via a bayonet mechanism, by snap-fastening, gripping, welding, bonding or by magnetic attraction. "Snapping" is understood in particular any system involving the crossing of a bead or cord of material by elastic deformation of a portion, including the closure, followed by return to the elastically unstressed position of said portion after the crossing of the bead or cord.

The container may be at least partly made of thermoplastic material. Examples of thermoplastic materials include polypropylene or polyethylene.

Alternatively, the container is made of non-thermoplastic material, especially glass or metal (or alloy).

The container may have rigid walls or deformable walls, especially in form of a tube or a tubular bottle.

The container may comprise means for causing or facilitating the distribution of the composition. For example, the container may have deformable walls so as to cause the output of the composition in response to an excess pressure inside the container, this positive pressure being caused by elastic (or non-elastic) squeezing of the container walls . Alternatively, especially when the product is in the form of a stick, the latter can be driven by a piston mechanism. Always in the case of a stick, especially of makeup product (lipstick, foundation, etc.), the container may comprise a mechanism, especially a rack, or a threaded rod, or with a helical ramp, and capable of moving a stick in the direction of the opening. Such a mechanism is described for example in FR 2806273 or in patent FR 2 775 566. Such a mechanism for a liquid product is described in FR 2,727,609.

The container may consist of a carton with a base delimiting at least one housing containing the composition, and a lid, especially articulated on the base, and capable of covering at least partially said bottom. Such a case is described for example in application WO 03/018423 or in patent FR 2 791 042. The container may be equipped with a drainer arranged in the vicinity of the container opening. Such a drainer makes it possible to wipe the applicator and possibly the rod to which it may be secured. Such a drainer is described for example in FR 2792618.

The composition may be at atmospheric pressure inside the container (at room temperature) or pressurized, especially by means of a propellent gas (aerosol). In the latter case, the container is equipped with a valve (of the type used for aerosols).

The content of the patents or patent applications mentioned above are incorporated by reference in the present application.

The invention is further illustrated by the examples described below.

Example 1:

Preparation of a poly (isobornyl acrylate / isobornyl methacrylate / acrylate 2-ethylhexyl)

100 g of isododecane are introduced into a 1 liter reactor and the temperature is increased so as to pass from room temperature (25 ° C) to 90 ° C over 1 hour. are then added at 90 ° C and in 1 hour, 105 g of isobornyl acrylate, 105 g of isobornyl methacrylate and 110 g of isododecane and 1, 8 g of 2.5- Bis (2- ethylhexanoylperoxy) - 2.5-dimethyl hexane (Trigonox^® 141 Akzo Nobel).

The mixture was held for 1 h 30 to 90 ° C.

Is then introduced into the above mixture, still at 90 ° C in 30 minutes, 90 g of acrylate 2-ethylhexyl, 90 g of isododecane and 1, 2 g of 2.5- Bis (2- ethylhexanoylperoxy) -2.5 -diméthylhexane.

The mixture is kept 3 hours at 90 ° C and then the whole is cooled.

This gave a solution containing 50% polymer active material in isododecane. A polymer comprising a first sequence or block poly (isobornyl acrylate / isobornyl methacrylate) having a Tg of 110 ° C, a second polyacrylate sequence of 2-ethylhexyl acrylate having a Tg of - 70 ° C and a intermediate block which is an acrylate random polymer isobornyl acrylate / isobornyl methacrylate / acrylate, 2-ethylhexyl.

This polymer has a weight-average mass of 103 900 and an average weight of 21 300, ie a polydispersity index I of 4.89.

Example 2:

A lipstick was prepared having the following composition

Block polymer of Example 1 to 50% by weight in isododecane 50 g

Hydrophobic treated fumed silica

(Aerosil R 972 from Degussa) 5 g sucrose acetate isobutyrate

(Eastman SAIB from Eastman Chemical) 5 g

hydrogenated polyisobutylene (parleam oil) 2.1 g

Octyldodecanol 0.9 g

phenylated silicone oil (Dow Corning 556 C) 2.1 g Copolymer of polyvinyl pyrrolidone / Eicosene

(Antaron V220 ISP) 1, 2 g

Pigments 3 g

Isododecane qs 100 g octydodécanol is mixed, the silicone oil, parleam oil, I 'sucrose acetate isobutyrate, and the copolymer of polyvinyl pyrrolidone / Eicosene heating to about 60 ° C. Is produced with this mixture a pigment millbase pigments by performing three passes of the mixture to the grinder sorting cylinders.

then mixed at room temperature the pigment millbase, isododecane, the block polymer is then introduced to the final silica. The formula is then introduced into a sealed water bottle.

Lipstick form a film having a hardness of 20 seconds measured by Persoz pendulum according to the protocol described above.

This lipstick therefore provides a flexible makeup, comfortable to wear over time, and not having a good transfer.

Example 3:

Was prepared a lipstick containing no plasticizer, thus not forming part of the invention, having the following composition:

Block polymer of Example 1 to 50% by weight in isododecane 50 g

Hydrophobic treated fumed silica (Aerosil R 972 from Degussa) 5 g

hydrogenated polyisobutylene (parleam oil) 2.1 g

Octyldodecanol 0.9 g

phenylsilicone silicone oil (Dow Corning 556 C) 2.1 g.

Copolymer of polyvinyl pyrrolidone / Eicosene (Antaron V220 of ISP) 1, 2 g

Pigments 3 g

Isododecane qs 100 g This lipstick forms a film having a hardness of 42 seconds. It therefore forms a less flexible makeup than that obtained with the lipstick of Example 2 of the invention.