Nail varnish composition comprising a sequenced polymer
OwnerPhilippe Ilekti, Bertrand Lioninventors
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Abstract
The present invention relates to a nail varnish composition comprising, in a cosmetically acceptable medium, at least one particular block polymer, the said composition being free of nitrocellulose and having a mean gloss greater than 50 out of 100. A subject of the invention is also the use of such a composition to obtain a film, deposited on the nails, which is glossy and which shows good staying power and wear resistance.
Claims77
Nitrocellulose-free nail varnish composition, characterized in that it comprises, in a cosmetically acceptable organic solvent medium, at least one film-forming linear ethylenic block polymer, the said block polymer being such that, when it is present in sufficient amount in the composition, the mean gloss at 20° of a deposit of the said composition, once spread onto a support, is greater than or equal to 50 out of 100.
Composition according to one of the preceding claims, characterized in that the block polymer is an ethylenic polymer derived from aliphatic ethylenic monomers comprising a carbon-carbon double bond and at least one ester group —COO— or amide —CON— group.
Composition according to one of the preceding claims, characterized in that the block polymer is not soluble 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 containing from 2 to 5 carbon atoms, without pH modification, at room temperature (25° C.).
Composition according to one of the preceding claims, characterized in that the block polymer contains first and second blocks that are linked together via an intermediate segment comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block.
Composition according to one of the preceding claims, characterized in that the block polymer contains first and second blocks that have different glass transition temperatures (Tg).
Composition according to the preceding claim, characterized in that the first and second blocks are linked together via an intermediate segment with a glass transition temperature between the glass transition temperatures of the first and second blocks.
Composition according to any one of the preceding claims, characterized in that the block polymer contains first and second blocks that are incompatible in the said organic liquid medium.
Composition according to one of the preceding claims, characterized in that the block polymer has a polydispersity index I of greater than 2.
Composition according to the preceding claim, characterized in that the monomers whose corresponding homopolymer has a glass transition temperature of greater than or equal to 40° C. are chosen from the following monomers:
- methacrylates of formula CH2═C(CH3)—COOR1
- in which R1 represents a linear or branched unsubstituted alkyl group containing from 1 to 4 carbon atoms, such as a methyl, ethyl, propyl or isobutyl group or R1 represents a C4 to C12 cycloalkyl group,
- acrylates of formula CH2═CH—COOR2
- in which R2 represents a C4 to C12 cycloalkyl group such as isobornyl acrylate or a tert-butyl group,
- (meth)acrylamides of formula:
- in which R7 and R8, which may be identical or different, each represent a hydrogen atom or a linear or branched alkyl group with 1 to 12 carbon atoms such as an n-butyl, t-butyl, isopropyl, isohexyl, isooctyl or isononyl group;
- or R7 represents H and R8 represents a 1,1-dimethyl-3-oxobutyl group, and R′ denotes H or methyl,
- and mixtures thereof.
Composition according to the preceding claim, characterized in that the first block is totally or partially derived from one or more monomers which are such that the homopolymer prepared from these monomers has a glass transition temperature of greater than or equal to 40° C.
Composition according to the preceding claim, characterized in that the first block with a Tg of between 20 and 40° C. is totally or partially derived from one or more monomers which are such that the homopolymer prepared from these monomers has a glass transition temperature of between 20 and 40° C.
Composition according to the preceding claim, characterized in that the additional monomer is chosen from hydrophilic monomers and ethylenically unsaturated monomers comprising one or more silicon atoms, and mixtures thereof.
Composition according to one of the preceding claims, characterized in that the block polymer has a weight-average mass (Mw) which is less than or equal to 300 000.
Composition according to any one of the preceding claims, characterized in that it comprises from 0.1% to 60% by weight of polymer active material, preferably from 5% to 50% by weight and more preferably from 10% to 40% by weight.
Composition according to one of the preceding claims, characterized in that the organic solvent medium comprises an organic solvent chosen from:
- ketones that are liquid at room temperature, such as methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, isophorone, cyclohexanone or acetone;
- alcohols that are liquid at room temperature, such as ethanol, isopropanol, diacetone alcohol, 2-butoxy-ethanol or cyclohexanol;
- glycols that are liquid at room temperature, such as ethylene glycol, propylene glycol, pentylene glycol or glycerol;
- propylene glycol ethers that are liquid at room temperature such as propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate or dipropylene glycol mono-n-butyl ether;
- cyclic ethers such as γ-butyrolactone;
- short-chain esters (containing from 3 to 8 carbon atoms in total) such as ethyl acetate, methyl acetate, propyl acetate, isopropyl acetate, n-butyl acetate, isopentyl acetate, methoxypropyl acetate or butyl lactate;
- ethers that are liquid at room temperature, such as diethyl ether, dimethyl ether or dichlorodiethyl ether;
- alkanes that are liquid at room temperature, such as decane, heptane, dodecane or cyclohexane;
- alkyl sulphoxides, such as dimethyl sulphoxide;
- aldehydes that are liquid at room temperature, such as benzaldehyde or acetaldehyde;
- heterocyclic compounds such as tetrahydrofuran;
- propylene carbonate or ethyl 3-ethoxypropionate;
- mixtures thereof.
Composition according to any one of the preceding claims, characterized in that it comprises a dyestuff.
Composition according to the preceding claim, characterized in that the dyestuff is present in a content ranging from 0.01% to 50% by weight and preferably from 0.01% to 30% by weight, relative to the total weight of the composition.
Composition according to the preceding claim, characterized in that it contains a plasticizer, which is present in an amount of less than 20%, preferably less than 15%, better still less than 10% and even better still less than 5% by weight, relative to the total weight of the composition.
Composition according to the preceding claim, characterized in that the mean gloss of the composition measured at 20° is greater than or equal to 50 out of 100, better still greater than or equal to 55, even better still greater than or equal to 60, even better still greater than or equal to 65, even better still greater than or equal to 70 or even better still greater than or equal to 75 out of 100, or even greater than or equal to 80 out of 100.
Composition according to the preceding claim, characterized in that the mean gloss of the composition, once spread onto a support, measured at 60° is greater than or equal to 50, better still greater than or equal to 60, better still greater than or equal to 65, better still greater than or equal to 70, better still greater than or equal to 75, better still greater than or equal to 80, better still greater than or equal to 85 or better still greater than or equal to 90 out of 100.
Cosmetic assembly comprising:
- a) a container delimiting at least one compartment, the said container being closed by a closing member;
- and
- b) a composition placed inside the said compartment, the composition being in accordance with any one of the preceding claims.
Dependencies are inferred from the claim text.