Cosmetic composition comprising a sequenced polymer and a plasticizer
AssigneeL'oreal
InventorsXavier Blin, Veronique Ferrari
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Abstract
A subject matter of the invention is a cosmetic composition 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, the nature and the amount of which are such that the composition is capable of forming a film having a hardness of 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, and in particular a compound having a solubility parameter δh ranging from 5.5 to 11 (J/cm3)1/2. Application to making-up and caring for keratinous substances, in particular the skin.
Claims94
Cosmetic composition 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 devoid of styrene,
- the plasticizer is a compound, the nature and the amount of which are such that the composition is capable of forming a film having a hardness of 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.
Composition according to any one of the preceding claims, characterized in that the plasticizer is a compound having a solubility parameter δh ranging from 5.5 to 11 (J/cm3)1/2.
Cosmetic composition 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 δh ranging from 5.5 to 11 (J/cm3)1/2.
Composition according to any one of the preceding claims, characterized in that the block polymer is non-elastomeric.
Composition according to any one of the preceding claims, characterized in that the block polymer comprises at least one first block and at least one second block having different glass transition temperatures (Tg), said first and second blocks being connected to one another via an intermediate block comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block.
Composition according to the preceding claim, characterized in that the first and second blocks are incompatible with one another.
Composition according to any one of the preceding claims, characterized in that the block polymer has a polydispersity index I of greater than 2.
Composition according to any one of the preceding claims, characterized in that the block polymer comprises at least one first block having a glass transition temperature (Tg) of greater than or equal to 40° C. and at least one second block having a glass transition temperature of less than or equal to 20° C.
Composition according to the preceding claim, characterized in that the proportion of the first block ranges from 20 to 90% by weight of the polymer, better still from 30 to 80% and even better still from 50 to 70%.
Composition according to the preceding claim, characterized in that the proportion of the first block having a Tg of between 20 and 40° C. ranges from 10 to 85% by weight of the polymer, better still from 30 to 80% and even better still from 50 to 70%.
Composition according to the preceding claim, characterized in that the block having a Tg of greater than or equal to 40° C. is a copolymer resulting from monomers, the homopolymer of which has a glass transition temperature of greater than or equal to 40° C.
Composition according to the preceding claim, characterized in that the monomers, the homopolymer of which has a glass transition temperature of less than or equal to 20° C., are chosen from the following monomers:
- acrylates of formula CH2═CHCOOR3,
- R3 representing an unsubstituted linear or branched C1 to C12 alkyl group, with the exception of the tert-butyl group, in which one or more heteroatoms chosen from O, N or S is (are) optionally inserted,
- methacrylates of formula CH2═C(CH3)—COOR4,
- R4 representing an unsubstituted linear or branched C6 to C12 alkyl group in which one or more heteroatoms chosen from O, N and S is (are) optionally inserted,
- vinyl esters of formula R5—CO—O—CH═CH2,
- where R5 represents a linear or branched C4 to C12 alkyl group,
- C4 to C12 alkyl vinyl ethers, such as methyl vinyl ether and ethyl vinyl ether,
- N—(C4 to C12 alkyl)acrylamides, such as N-octylacrylamide,
- and their mixtures.
Composition according to any one of claims 15 to 20 and 23 to 31, characterized in that the block having a glass transition temperature of less than or equal to 20° C. is a homopolymer.
Composition according to the preceding claim, characterized in that the additional monomer is chosen from hydrophilic monomers, monomers with ethylenic unsaturation comprising one or more silicon atoms, and their mixtures.
Composition according to one of the preceding claims, characterized in that the first and second blocks are such that the difference between the glass transition temperatures (Tg) of the first and second blocks is greater than 10° C., preferably greater than 20° C., preferentially greater than 30° C. and more preferentially greater than 40° C.
Composition according to one of the preceding claims, characterized in that the intermediate block has a glass transition temperature between the glass transition temperatures of the first and second blocks.
Composition according to one of the preceding claims, characterized in that the block polymer has a polydispersity index of greater than or equal to 2.5, preferably of greater than or equal to 2.8, preferably of between 2.8 and 6.
Composition according to one of the preceding claims, characterized in that the block polymer has a weight-average mass (Mw) of less than or equal to 300 000, preferably ranging from 35 000 to 200 000 and better still ranging from 45 000 to 150 000.
Composition according to one of the preceding claims, characterized in that the block polymer has a number-average mass (Mn) of less than or equal to 70 000, preferably ranging from 10 000 to 60 000 and better still ranging from 12 000 to 50 000.
Composition according to one of the preceding claims, characterized in that the block polymer is insoluble, at an active material content of at least 1% by weight, in water or in a mixture of water and of linear or branched lower monoalcohols having from 2 to 5 carbon atoms, without modification of pH, at ambient temperature (25° C.).
Composition according to any one of the preceding claims, characterized in that the block polymer is present in a content ranging from 0.1% to 90% by weight, with respect 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.
Composition according to any one of the preceding claims, characterized in that the plasticizer is a compound having a solubility parameter δh ranging from 5.5 to 11 (J/cm3)1/2, preferably ranging from 5.5 to 11, preferentially ranging from 5.9 to 11, preferably ranging from 7 to 10.5, preferably ranging from 9 to 10, more preferentially ranging from 8 to 10 (J/cm3)1/2.
Composition according to any one of the preceding claims, characterized in that the plasticizer is a compound having a solubility parameter δp ranging from 1.5 to 4.5 (J/cm3)1/2, preferably ranging from 1.5 to 4 (J/cm3)1/2, preferably ranging from 1.5 to 3.5 (J/cm3)1/2, preferably again ranging from 2 to 3 (J/cm3)1/2.
Composition according to any one of the preceding claims, characterized in that the plasticizer has a molecular mass of less than or equal to 5000 g/mol, preferably of less than or equal to 2000 g/mol, preferentially of less than or equal to 1000 g/mol and more preferentially of less than or equal to 900 g/mol. The plasticizer advantageously has a molecular mass of greater than or equal to 100 g/mol.
Composition according to any one of the preceding claims, characterized in that the plasticizer is an ester.
Composition according to any one of the preceding claims, characterized in that the plasticizer is 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.
Composition according to the preceding claim, characterized in that the polyol is a monosaccharide, preferably a cyclized monosaccharide in the hemiacetal form.
Composition according to any one of the preceding claims, characterized in that the plasticizer is a sucrose diacetate hexa(2-methylpropanoate).
Composition according to the preceding claim, characterized in that:
- the aliphatic alcohol is chosen from alcohols R1OH, R1 representing methyl, ethyl, propyl, isopropyl, butyl, hexyl, ethylhexyl, decyl, isodecyl, benzyl or benzyl substituted by an alkyl comprising 1 to 3 carbon atoms, and their mixtures;
- the aliphatic or aromatic polycarboxylic acid comprises from 3 to 12 carbon atoms, preferably from 3 to 10 carbon atoms, preferably from 3 to 8 carbon atoms, for example 6 or 8 carbon atoms.
Composition according to any one of the preceding claims, characterized in that the plasticizer is present in a content ranging from 0.1% to 25% by weight, with respect to the total weight of the composition, preferably ranging from 0.5% to 15% by weight and preferentially ranging from 3% to 15% by weight.
Composition according to any one of the preceding claims, characterized in that the block polymer and the plasticizer are present in a content such that the ratio by weight of the block polymer to the plasticizer is between 0.5 and 100, preferably between 1 and 50, preferably between 1 and 10, preferably again between 1 and 5.
Composition according to any one of the preceding claims, characterized in that it comprises a volatile oil.
Composition according to any one of the preceding claims, characterized in that it comprises a volatile oil chosen from octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, isododecane, isodecane or isohexadecane.
Composition according to any one of the preceding claims, characterized in that it comprises a nonvolatile oil.
Composition according to the preceding claim, characterized in that the nonvolatile oil is chosen from nonvolatile hydrocarbon oils or nonvolatile silicone oils.
Composition according to any one of the preceding claims, characterized in that the nonvolatile oil is present in a content ranging from 0.1% to 20% by weight, with respect to the total weight of the composition, preferably ranging from 1% to 15% by weight and preferentially ranging from 1% to 10% by weight.
Composition according to any one of the preceding claims, characterized in that it comprises at least one fatty substance which is solid at ambient temperature chosen from waxes, pasty fatty substances, gums and their mixtures.
Composition according to any one of the preceding claims, characterized in that it comprises from 0.1 to 50% by weight of waxes, with respect to the total weight of the composition, and preferably from 1 to 30% by weight.
Composition according to any one of the preceding claims, characterized in that it comprises a coloring material.
Composition according to any one of the preceding claims, characterized in that it comprises a cosmetic ingredient chosen from additional film-forming polymers, vitamins, thickeners, trace elements, softeners, sequestering agents, fragrances, basifying or acidifying agents, preservatives, sunscreen agents, surfactants, antioxidants, agents for combatting hair loss, antidandruff agents, propellants or their mixtures.
Cosmetic composition according to any one of the preceding claims, characterized in that it is provided in the form of a suspension, dispersion, solution, gel, emulsion, in particular oil-in-water (O/W) or water-in-oil (W/O) or multiple (W/O/W or polyol/O/W or O/W/O) emulsion, cream, foam, dispersion of vesicles, in particular of ionic or nonionic lipids, two-phase or multiphase lotion, spray, powder or paste, in particular soft paste or anhydrous paste.
Cosmetic composition according to any one of the preceding claims, characterized in that it is provided in the anhydrous form.
Cosmetic composition according to any one of the preceding claims, characterized in that it is a composition for making up or caring for keratinous substances.
Composition according to any one of the preceding claims, characterized in that the composition is a product for making up the lips.
Cosmetic combination comprising:
- a) a container delimiting at least one compartment, said container being closed by a closing element;
- and
- b) a composition positioned inside said compartment, the composition being in accordance with any one of the preceding claims.
Use, in a cosmetic composition comprising a cosmetically acceptable organic liquid medium,
- of a film-forming linear ethylenic block polymer,
- and of a plasticizer having a solubility parameter δh ranging from 5.5 to 11 (J/cm3)1/2,
- for producing a deposited layer, in particular a makeup, on keratinous substances, in particular on the skin or lips, which is flexible and/or comfortable over time.
Dependencies are inferred from the claim text.