NAIL COMPOSITION CONTAINING A DISPERSION OF ACRYLIC POLYMER PARTICLES

Abstract

NAIL COMPOSITION CONTAINING AN ACRYLIC POLYMER PARTICLE DISPERSION. Nail composition comprising a base composition and an acrylic polymer particle dispersion. The acrylic polymer particle dispersion is a dispersion of C1-C4 alkyl (meth)acrylate polymer particles stabilized with a stabilizer in a hydrocarbon oil, where the stabilizer is selected from the group consisting of: isobornyl (meth)acrylate homopolymers and random copolymers of isobornyl (meth)acrylate and C1-C4 alkyl (meth)acrylate. The nail composition does not include UV-curable material. Figure for the abstract: none

Description

Title of the invention: NAIL COMPOSITION CONTAINING A DISPERSION OF ACRYLIC POLYMER PARTICLES Technical field

[0001] The present invention relates to nail compositions comprising a dispersion of acrylic polymer particles and a base composition. BACKGROUND OF THE INVENTION

[0002] Nail compositions may consist of a protective base for adhesion to the nails, one or more colored coatings to enhance the color, and a top coat for shine. A nail composition set is therefore a system that generally contains a combination of protective base coats, colored coatings, and / or top coats. Over time, nail compositions applied to the nails lose their shine and begin to chip. These properties can appear anywhere from the day the nail composition is applied to 2 to 20 days later. The user must then remove the nail composition and reapply it, which can be time-consuming.

[0003] It would be desirable to have a nail composition that possesses one or more of the following properties (preferably, all of the following properties): good wear and good shine, without altering the hardness of the nail composition. Summary of the invention

[0004] The present invention relates to a nail composition comprising a dispersion of acrylic polymer particles and a base composition.

[0005] The present invention also relates to a nail composition assembly comprising (1) a coloured coating composition; and (2) a varnish protector composition comprising a dispersion of acrylic polymer particles and a base composition.

[0006] The present invention also relates to a nail composition assembly comprising (1) a coloured coating composition comprising a dispersion of acrylic polymer particles and a base composition; and (2) a varnish protector composition.

[0007] The present invention also relates to a nail composition comprising (1) a colored coating composition comprising a dispersion of acrylic polymer particles and a base composition; and (2) a composition of coloured varnish protector comprising a dispersion of acrylic polymer particles and a base composition.

[0008] The present invention further relates to nail makeup and / or protection methods comprising the application to the nails of a nail composition comprising a dispersion of acrylic polymer particles and a base composition.

[0009] The present invention further relates to nail makeup and / or protection methods comprising the application to the nails of a nail composition comprising (1) a coloured coating composition; and (2) a varnish protector composition comprising a dispersion of acrylic polymer particles and a base composition.

[0010] The present invention further relates to nail makeup and / or protection methods comprising the application to the nails of a nail composition comprising (1) a colored coating composition comprising a dispersion of acrylic polymer particles and a base composition; and (2) a varnish protector composition.

[0011] The present invention further relates to nail makeup and / or protection methods comprising the application to the nails of a nail composition comprising (1) a coloured coating composition comprising a dispersion of acrylic polymer particles and a base composition; and (2) a coloured varnish protector composition comprising a dispersion of acrylic polymer particles and a base composition.

[0012] The present invention also relates to methods for improving the wear and shine of a nail composition comprising the addition of a dispersion of acrylic polymer particles and a base composition in which the addition of the dispersion of acrylic polymer particles and the base composition results in a nail composition having improved wear and shine properties.

[0013] It must be understood that both the preceding general description and the detailed description that follows are provided by way of example and explanation only, and do not limit the invention. DETAILED DESCRIPTION

[0014] In the following description of the invention and the claims annexed thereto, it shall be understood that the terms used have their ordinary and usual meanings in the art, unless otherwise stated.

[0015] “Approximately” or “about” in this document means at 10 % close to the number indicated (for example, "about 10%" means 9% to 11% and "about 2%" means 1.8% to 2.2%).

[0016] In this document, all proposed ranges are intended to include each specific range within the given ranges, and all combinations of intermediate sub-ranges. Thus, a range from 1 to 5 specifically includes 1, 2, 3, 4 and 5, as well as the sub-ranges 2 to 5, 3 to 5, 2 to 3, 2 to 4, 1 to 4, etc.

[0017] “Adhesion” in this document means chemical and / or physical bonding between a coating and a substrate. Good adhesion between the nail polish and the nail surface should result in good wear properties for consumers.

[0018] “Adhesive agent” or “adhesive” means a substance that improves bonding chemical and / or physical interaction between a coating and a substrate. In the present invention, the adhesive agent improves the bond between the compositions and the surface of the nail or other compositions.

[0019] “Film-forming”, “film-forming polymer” or “film-forming agent” in the present document means a polymer or resin that leaves a film on the substrate to which it is applied, for example, after a solvent accompanying the film-forming agent has evaporated.

[0020] “Exempt” or “devoid” in this document means that although it While it is preferable that no quantity of the specific component be present in the composition, it is possible that very small quantities of it may be present in the compositions of the invention, provided that these quantities do not materially affect at least one, preferably most, of the advantageous properties of the compositions of the invention. Thus, for example, "solvent-free" means that non-aqueous solvents are preferably omitted (i.e., 0% by weight), but may be present in the composition in an amount less than about 0.25% by weight, typically less than about 0.1% by weight, typically less than about 0.05% by weight, relative to the total weight of the composition.

[0021] “Water-free”, “anhydrous” or “water-free” means in this document that Water is preferentially omitted (i.e., 0% by weight), but may be present in the composition in an amount less than about 0.25% by weight, typically less than about 0.1% by weight, typically less than about 0.05% by weight, relative to the total weight of the composition.

[0022] “Makeup Result” in this document means compositions where the The color remains the same or substantially the same as at the time of application, as seen with the naked eye, after a prolonged period of time. The "Makeup Result" can be evaluated by assessing the long-lasting properties using any method known in the art for evaluating such properties. For example, long-lasting performance can be assessed by a test involving the application of a composition on the nails and by evaluating the color of the composition after an extended period. For example, the color of a composition can be evaluated immediately after application to nails, and these characteristics can then be re-evaluated and compared after a certain time. Furthermore, these characteristics can be evaluated in relation to other compositions, such as commercially available ones.

[0023] The term “Makeup” in this document means providing decoration (e.g., color) to the nail.

[0024] “Protect” in this document means prevent damage to the nail (for example, chipping) by providing a protective layer on the nail.

[0025] “Nails”, “fingernail” or “toenail” refers to a keratinous substrate human on a finger or toe that can be treated (decorated) with one or multiple cosmetic nail compositions.

[0026] “Nail treatment system” or “nail composition kit” means multiple compositions applied to the surface of the nails.

[0027] “Nail composition” or “lacquer” or “varnish” or “lacquer varnish” or “ "nail film" refers to lacquer varnish usable as a protective base, coloured coating, varnish protector, clear varnish and protective coating applied to nails separately and / or as a combined application of the above.

[0028] “Substituted” in this document means comprising at least one substitute. Non-limiting examples of substituents for substitution include atoms, such as oxygen and nitrogen atoms, as well as functional groups, such as hydroxyl groups, ether groups, alkoxy groups, acyloxyalkyl groups, oxyalkylene groups, polyoxyalkylene groups, carboxylic acid groups, amine groups, acylamino groups, amide groups, halogen-containing groups, ester groups, thiol groups, sulfonate groups, thiosulfate groups, siloxane groups, and polysiloxane groups. The substituent(s) may be further substituted.

[0029] The compositions and methods of the present invention may comprise, be made up of, or be made up essentially of the essential elements and limitations of the invention described herein, as well as any additional or optional ingredient, component or limitation described herein or otherwise useful.

[0030] Reference is made in this document to brand names of materials including, but not limited to, polymers and optional components. The inventors do not intend to limit themselves in this document to the materials described and referenced by a particular brand name. Equivalent materials (for example, those obtained from a different source under a different (reference) name or number) (different catalogue) to those referenced by a brand name can be substituted and used in the processes described and claimed herein.

[0031] All percentages and ratios are calculated by weight unless otherwise stated. All percentages are calculated relative to the total weight of a composition unless otherwise stated. All component or composition levels refer to the active level of that component or composition and are understood to exclude impurities, for example, residual solvents or by-products, which may be present in commercially available sources.

[0032] Dispersion of acrylic polymer particles

[0033] According to the present invention, nail compositions containing a dispersion of acrylic polymer particles are proposed. According to the present invention, the acrylic polymer particle dispersions are dispersions of C1-C4 alkyl (meth)acrylate polymer particles stabilized with isobornyl (meth)acrylate polymer-based stabilizers in a hydrocarbon-based oil. Certain dispersions of acrylic polymer particles were previously disclosed in PCT patent application serial number PCT / EP2014 / 07800 and US patent applications US20170172883A1 and US20170172890AL

[0034] According to preferred embodiments, the particle polymer is a C1-C4 alkyl (meth)acrylate polymer. The C1-C4 alkyl (meth)acrylate monomers may be selected from methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, and tert-butyl (meth)acrylate. Preferably, the monomer is a C1-C4 alkyl acrylate monomer. Preferably, the particle polymer is a methyl acrylate and / or ethyl acrylate polymer.

[0035] The polymer of the particles may also comprise a monomer of an ethylenically unsaturated acid or its anhydride, preferably selected from monomers of ethylenically unsaturated acids comprising at least one carboxylic, phosphoric, or sulfonic acid function, such as, for example, crotonic acid, itaconic acid, fumaric acid, maleic acid, maleic anhydride, styrenesulfonic acid, vinylbenzoic acid, vinylphosphoric acid, acrylic acid, methacrylic acid, acrylamidopropanesulfonic acid, or acrylamidoglycolic acid, and / or their salts. Preferably, the monomer of ethylenically unsaturated acid is selected from (meth)acrylic acid, maleic acid, and maleic anhydride. Most preferably, the monomer of ethylenically unsaturated acid is acrylic acid.Salts can preferably be chosen from alkali metal salts, for example sodium or potassium; alkaline earth metal salts, for example calcium, magnesium or strontium; . metallic salts, for example zinc, aluminium, manganese or copper; ammonium salts of formula NH4+; quaternary ammonium salts; organic amine salts, for example methylamine, dimethylamine, trimethylamine, triethylamine, ethylamine, 2-hydroxyethylamine, bis(2-hydroxyethyl)amine or tris(2-hydroxyethyl)amine salts; lysine or arginine salts.

[0036] The polymer of the particles can thus comprise or consist essentially of 80% to 100%, preferably 85% to 95%, or about 90% by weight of C1-C4 alkyl (meth)acrylate and 0% to 20%, preferably 5% to 15% or about 10% by weight of ethylenically unsaturated acid monomer, relative to the total weight of the polymer.

[0037] According to preferred embodiments, the polymer essentially consists of a polymer of one or more C1-C4 alkyl (meth)acrylate monomers.

[0038] According to preferred embodiments, the polymer essentially consists of a copolymer of methyl and ethyl acrylate. In the copolymer, ethyl acrylate is 50 to 95% by weight and methyl acrylate is 5 to 50% by weight, including all intermediate ranges and sub-ranges.

[0039] The polymer of the particles can be chosen from, for example: methyl acrylate homopolymers; ethyl acrylate homopolymers; methyl acrylate / ethyl acrylate copolymers; methyl acrylate / ethyl acrylate / acrylic acid copolymers; methyl acrylate / ethyl acrylate / maleic anhydride copolymers; methyl acrylate / acrylic acid copolymers; ethyl acrylate / acrylic acid copolymers; methyl acrylate / maleic anhydride copolymers; and ethyl acrylate / maleic anhydride copolymers.

[0040] Preferably, the polymer of the particles is a non-crosslinked polymer.

[0041] The polymer of the dispersion particles preferably has a number average molecular weight ranging from about 2000 to about 10,000,000, preferably ranging from about 150,000 to 500,000, including all intermediate ranges and sub-ranges.

[0042] The polymer of the particles is preferentially present in the dispersion in a content ranging from about 21% to about 58.5% by weight, preferably ranging from about 36% to about 42% by weight, relative to the total weight of the dispersion, including all intermediate ranges and sub-ranges.

[0043] The stabilizer is preferably an isobornyl (meth)acrylate polymer selected from an isobornyl (meth)acrylate homopolymer and random copolymers of isobornyl (meth)acrylate and C1-C4 alkyl (meth)acrylate present in a weight ratio of isobornyl (meth)acrylate / C1-C4 alkyl (meth)acrylate greater than 4. Preferably, the weight ratio ranges from about 4.5 to about 19, including all intermediate ranges and sub-ranges.

[0044] Preferably, the stabilizer is chosen from, for example: isobornyl acrylate homopolymers; isobornyl acrylate / methyl acrylate statistical copolymers; isobornyl acrylate / methyl acrylate / ethyl acrylate statistical copolymers; isobornyl methacrylate / methyl acrylate statistical copolymers, in the weight ratio described above.

[0045] The stabilizing polymer preferably has a number average molecular weight ranging from about 10,000 to about 400,000, preferably from about 20,000 to about 200,000, including all intermediate ranges and sub-ranges.

[0046] Although not wishing to be bound by any particular theory, it is thought that the stabilizer is in contact with the surface of the polymer particles and thus makes it possible to stabilize these particles on the surface in order to keep these particles in dispersion in the non-aqueous medium of the dispersion.

[0047] Preferably, the stabilizer+polymer combination of the particles present in the dispersion comprises about 1% to about 50%, preferably 20% to 40%, or about 30% by weight of polymerized isobornyl (meth)acrylate, and about 50% to about 90%, preferably 60% to 80%, or about 70% by weight of polymerized C1-C4 alkyl (meth)acrylate, relative to the total weight of the stabilizer+polymer combination of the particles.

[0048] Preferably, the stabilizer+polymer combination of the particles present in the dispersion comprises about 15% to about 30% by weight of polymerized isobornyl (meth)acrylate, and about 70% to about 85% by weight of polymerized C1-C4 alkyl (meth)acrylate, relative to the total weight of the stabilizer+polymer combination of the particles.

[0049] The oily medium of the polymer dispersion comprises a hydrocarbon-based oil.

[0050] Hydrocarbon-based oil is an oil that is liquid at room temperature (25 °C).

[0051] The expression "hydrocarbon-based oil" means an oil formed essentially, or even composed, of carbon and hydrogen atoms, and optionally of oxygen and nitrogen atoms, and containing no silicon or fluorine atoms. It may contain, for example, alcohol, ester, ether, carboxylic acid, amine and / or amide groups.

[0052] The hydrocarbon-based oil may be selected from, for example: hydrocarbon-based oils containing 8 to 14 carbon atoms, preferably: C8-C14 branched alkanes, for example, petroleum-derived C8-C14 isoalkanes (also known as isoparaffins), for example isododecane (also known as 2,2,4,4,6-pentamethylheptane), isodecane, and, for example, oils sold under the trade name Isopar or Permethyl, linear alkanes, for example n-dodecane (C12) and n-tetradecane (C14) sold by Sasol under the respective references Parafol 12-97 and Parafol 14-97, and their mixtures; the undecane-tridecane mixture; the mixtures of n-undecane (C11) and n-tridecane (C13) obtained in Examples 1 and 2 of Cognis patent application WO 2008 / 155059, and their mixtures; short-chain esters (containing from 3 to 8 carbon atoms in total) such as ethyl acetate, methyl acetate, propyl acetate, or n-butyl acetate; oils based on vegetable hydrocarbons such as triglycerides consisting of fatty acid esters of glycerol, the fatty acids of which may have chain lengths varying from C4 to C24, these chains can be linear or branched, and saturated or unsaturated;These oils include, in particular, triglycerides of heptanoic or octanoic acid, or alternatively wheat germ oil, sunflower oil, grapeseed oil, sesame oil, corn oil, apricot oil, castor oil, shea oil, avocado oil, olive oil, soybean oil, sweet almond oil, palm oil, rapeseed oil, cottonseed oil, hazelnut oil, macadamia oil, jojoba oil, alfalfa oil, poppy oil, pumpkin oil, pumpkin seed oil, blackcurrant oil, evening primrose oil, millet oil, barley oil, quinoa oil, rye oil, safflower oil, candlenut oil, passionflower oil, rosehip oil; shea butter; or even caprylic / capric acid triglycerides, for example those sold by the company Stearineris Dubois or those sold under the names Migloyl 810®, 812® and 818® by the company Dynamyt Nobel, synthetic ethers containing 10 to 40 carbon atoms;linear or branched hydrocarbons of mineral or synthetic origin, such as petrolatum, polydecenes, hydrogenated polyisobutene such as Parleam®, squalane and liquid paraffins, and mixtures thereof, synthetic esters such as oils of formula R1COOR2 in which RI represents a linear or branched fatty acid residue containing 1 to 40 carbon atoms and R2 represents a hydrocarbon-based chain, in particular, branched, containing 1 to 40 carbon atoms, provided that R1+R2^10, for example Purcellin oil (cetostearyl octanoate), isopropyl myristate, isopropyl palmitate, C12-C15 alkyl benzoates, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, isostearyl isostearate, 2-hexyldecyl laurate, 2-octyldecyl palmitate, 2-octyldodecyl myristate, alkyl or polyalkyl heptanoates, octanoates, decanoates or ricinoleates such as propylene glycol dioctanoate;hydroxylated esters such as isostearyl lactate, diisostearyl malate and 2-octyldodecyl lactate; polyol esters and pentaerythritol esters, fatty alcohols which are liquid at room temperature, with a branched and / or unsaturated carbon-based chain containing 12 to 26 carbon atoms, for example; octyldodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-butyloctanol and 2-undecylpentadecanol.

[0053] Preferably, the hydrocarbon-based oil is non-polar (formed solely of carbon and hydrogen atoms).

[0054] The hydrocarbon-based oil is preferably chosen from among hydrocarbon-based oils containing 8 to 14 carbon atoms, in particular the non-polar oils described above. Preferably, the hydrocarbon-based oil is isododecane.

[0055] The polymer particles of the dispersion preferably have an average size, in particular an average number size, ranging from about 50 to about 500 nm, preferably ranging from about 75 to about 400 nm, and preferably ranging from about 100 to about 250 nm, including all intermediate ranges and sub-ranges.

[0056] In general, the dispersion according to the invention can be prepared in the following manner, which is given by way of example.

[0057] Polymerization can be carried out in dispersion, i.e., by precipitation of the polymer during formation, with protection of the formed particles by a stabilizer. In a first step, the stabilizing polymer is prepared by mixing the constituent monomer(s) of the stabilizing polymer with a radical initiator in a solvent known as the synthesis solvent, and polymerizing these monomers. In a second step, the constituent monomer(s) of the polymer of the particles are added to the formed stabilizing polymer, and the polymerization of these added monomers is carried out in the presence of the radical initiator.

[0058] When the non-aqueous medium is a non-volatile hydrocarbon-based oil, polymerization can be carried out in a non-polar organic solvent (synthetic solvent), followed by the addition of the non-volatile hydrocarbon-based oil (which must be miscible with said synthetic solvent) and selective distillation of the synthetic solvent. A synthetic solvent is therefore chosen such that the monomers of the stabilizing polymer and the free radical initiator are soluble in it, and the resulting polymer particles are insoluble in it, so that they precipitate during their formation. In particular, the synthetic solvent can be chosen from among alkanes such as heptane or cyclohexane.

[0059] When the non-aqueous medium is a volatile hydrocarbon-based oil, polymerization can be carried out directly in the oil, which therefore also acts as a synthesis solvent. The monomers must also be soluble in the oil, as must the free radical initiator, and the polymer of the resulting particles must be insoluble in it.

[0060] The monomers are preferentially present in the synthesis solvent, prior to polymerization, in a proportion of approximately 5 to approximately 20% by weight. The total amount of monomers may be present in the solvent before the start of the reaction, or some of the monomers may be added gradually as the polymerization reaction progresses. The free radical initiator is preferably azobisisobutyronitrile or tert-butylperoxy-2-ethylhexanoate.

[0061] Polymerization can be carried out at a temperature ranging from about 70 to about 110°C.

[0062] The polymer particles are stabilized on the surface, when they form during polymerization, by means of the stabilizer.

[0063] Stabilization can be achieved by any known means, and in particular by direct addition of the stabilizer during polymerization. Preferably, the stabilizer is also present in the mixture before polymerization of the monomers of the polymer particles. However, it is also possible to add it continuously, particularly when the monomers of the polymer particles are also added continuously.

[0064] From about 10% to about 30% by weight, preferably from about 15% to about 25% by weight of stabilizer can be used, relative to the total weight of monomers used (stabilizer + polymer of particles).

[0065] The polymer particle dispersion preferably comprises about 30% to about 65% by weight, preferably about 40% to about 60% by weight of dry matter, relative to the total weight of the dispersion.

[0066] Preferably, the oil dispersion may include a plasticizer, for example, a plasticizer selected from tri-n-butyl citrate, tripropylene glycol monomethyl ether (INCI name: PPG-3 methyl ether), and trimethyl pentaphenyl trisiloxane (sold under the name Dow Corning PH-1555 HRI Cosmetic Fluid by Dow Corning). These plasticizers improve the mechanical strength of the polymer film. If present, the plasticizer may be present in the oil dispersion in an amount ranging from approximately 5% to approximately 50% by weight, relative to the total weight of the polymer particles.

[0067] According to preferred embodiments, the particle polymer is a C1-C4 alkyl (meth)acrylate polymer; the stabilizer is an isobornyl (meth)acrylate polymer selected from an isobornyl (meth)acrylate homopolymer and statistical copolymers of isobornyl (meth)acrylate and C1-C4 alkyl (meth)acrylate present in a weight ratio of isobornyl (meth)acrylate / C1-C4 alkyl (meth)acrylate greater than 4. For these statistical stabilizing copolymers, the defined weight ratio makes it possible to obtain a polymer dispersion that is stable, in particular after storage for seven days at room temperature (25 °C).

[0068] The dispersions according to the invention consist of particles, which are generally spherical, of at least one surface-stabilized polymer, in a non-aqueous medium.

[0069] Preferably, the amount of acrylic polymer particle dispersion present in the nail compositions of the present invention ranges from about 0.01% to about 20% by weight relative to the total weight of the composition, preferably from about 0.5% to about 10% by weight relative to the total weight of the composition, preferably from about 1% to about 3% by weight relative to the total weight of the composition, including all intermediate ranges and sub-ranges.

[0070] Base composition for nail composition

[0071] According to preferred embodiments, the base composition for the nail compositions of the present invention is a solvent-based composition. Examples of ingredients that may be found in the nail compositions of the present invention are given below, although not all of the identified ingredients need necessarily be present.

[0072] Film-forming polymer

[0073] According to preferred embodiments, the nail compositions of the present invention comprise at least one non-photocurable film-forming polymer. "Film-forming polymer" means a non-photocurable polymer capable of forming on its own (i.e., in the absence of an auxiliary film-forming agent or an external stimulus such as UV rays, for example), a film capable of being isolated, in particular a continuous adherent film, onto a substrate, in particular onto nails. Preferably, the film-forming polymer is selected from the group consisting of synthetic radical or polycondensate polymers, polymers of natural origin, and mixtures thereof.

[0074] Specific examples of suitable film-forming polymers include, but are not limited to, polysaccharide derivatives, such as cellulose or guar gum derivatives, including nitrocellulose and / or a polysaccharide ester or an alkyl ether such as a polysaccharide consisting of repeating motifs comprising at least two identical or different rings and having a degree of substitution per saccharide motif between 1.9 and 3, preferably between 2.2 and 2.9, and preferably between 2.4 and 2.8, such as cellulose esters (such as cellulose acetobutyrates or cellulose acetopropionates), cellulose alkyl ethers (such as ethylcelluloses) and ethylguars.Specific examples of suitable film-forming polymers also include, but are not limited to, alkyd resins, organic-silicone polymer hybrid compounds, polyurethanes, polyvinyl butyrals and ketone / aldehyde resins, resins derived from aldehyde condensation products, such as aryl sulfonamide formaldehyde resins like formaldehyde resin. toluene-sulfonamide, aryl-sulfonamide epoxy resins or ethyl tosylamide resins.

[0075] Preferably, if present, at least one film-forming polymer is at least one alkyd resin. Preferably, at least one alkyd resin is a polyester comprising hydrocarbon chains of fatty acids. These resins are described in particular in the Kirk-Othmer Encyclopedia of Chemical Technology, 4th edition, Volume 2, pages 53 to 63. These resins can be obtained by polymerization of polyols and polyacids or their corresponding anhydrides in the presence of fatty acids, where the fatty acids can be used "as is" or in the form of fatty acid triglycerides or in the form of oils during the synthesis of the alkyd resin. Due to the presence of hydrocarbon chains of fatty acids in the alkyd resin, alkyd resins are generally defined by their oil length.Consequently, "oil length of an alkyd resin" is understood to mean the percentage by weight of fatty acid hydrocarbon chains present in the alkyd resin.

[0076] Examples of suitable polyols that can be used in the synthesis of alkyd resins include, but are not limited to, at least one of erythritol, trimethylolpropane, trimethylolethane, neopentyl glycol, propylene glycol, ethylene glycol, 1,6-hexanediol, 1,4-butanediol, diethylene glycol and, in particular, glycerol.

[0077] Examples of suitable polyacid or anhydride that can be used in the synthesis of alkyd resins include, but are not limited to, at least one of the following: isophthalic acid, terephthalic acid, trimellitic anhydride, maleic anhydride, adipic acid, fumaric acid, azelaic acid, sebacic acid and, in particular, phthalic anhydride.

[0078] Examples of suitable fatty acids that can be used in the synthesis of alkyd resins include, but are not limited to, at least one of the fatty acids corresponding to the formula R—COOH, in which R denotes a saturated or unsaturated hydrocarbon radical having preferably from 7 to 45 carbon atoms, preferably from 9 to 35 carbon atoms, preferably from 15 to 35 carbon atoms, and preferably from 15 to 21 carbon atoms. Examples include palmitic acid, stearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, and, in particular, capric acid.

[0079] Fatty acids are present in the majority of naturally derived oils, particularly in the form of triglycerides. Fatty acid triglycerides are esters resulting from the reaction of the three glycerol alcohol functional groups with fatty acids, which may be identical or different. Naturally derived oils can therefore be used during polymerization. They can be chosen, for example, from linseed oil, tung oil, or oxicica oil. soybean oil, sunflower oil, safflower oil, castor oil, coconut oil, olive oil, palm oil, rapeseed oil, peanut oil and tall oil.

[0080] Specific examples of acceptable alkyd resins include, but are not limited to, at least one of those sold under the names "Beckosol ODE 230 70E" by Dainippon Ink & Chem (70% phthalic anhydride / glycerol / glyceryl decanoate copolymer in ethyl acetate), "Necowel 581®" (50% in soybean oil), "Necowel 585®" (20% in sunflower oil), "Necowel 580®" (20% in sunflower oil), "Necowel 586 N®" (50% in soybean oil), "Necowel EP 1161®" (50% in soybean oil), "Necowel EP 1213®" (20% in oil), "Necowel EP 2009®" (32% in sunflower oil), “Necowel EP 2019®” (20% in oil), “Necowel EP 2275®” (35% in oil), “Necowel EP 2329®” (34% in oil) and “Necowel EP 3016®” (30% in oil) by Ashland or “Uradil XP 515 AZ®” (73% in tall oil) or “Uradil XP 516 AZ®” (63% in tall oil) by DSM resins.Beckosol ODE 230 70E (phthalic anhydride / glycerol / glycidyl decanoate copolymer in 70% ethyl acetate) is particularly preferred.

[0081] Preferably, if present, at least one film-forming polymer is present in the nail composition of the present invention in amounts of active material generally ranging from about 2% to about 60%, preferably from about 5% to about 50%, and more preferably from about 8% to about 45%, by weight, relative to the total weight of the composition, including all intermediate ranges and sub-ranges.

[0082] Solvent

[0083] According to preferred embodiments, nail compositions optionally comprising at least one solvent are provided. Any solvent commonly found in nail polish compositions may be used. Other suitable solvents include, but are not limited to, organic solvents that are liquid at room temperature.Examples of suitable solvents include, but are not limited to, ketones such as methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, isophorone, cyclohexanone or acetone; alcohols such as ethanol, isopropanol, diacetone alcohol, 2-butoxyethanol or cyclohexanol; glycols such as ethylene glycol, propylene glycol, pentylene glycol or glycerol; propylene glycol ethers such as propylene glycol monomethyl ether, propylene glycol acetate monomethyl ether or dipropylene glycol mono(n-butyl)ether; short-chain esters (having a total of 2 to 7 carbon atoms), such as ethyl acetate, methyl acetate, propyl acetate, n-butyl acetate or isopentyl acetate; Alkanes, such as decane, heptane, dodecane or cyclohexane, and mixtures thereof. Short-chain esters (having a total of 2 to 8 carbon atoms) are the most preferred.

[0084] Preferably, the solvent is present in the nail composition of the present invention in amounts of active material generally ranging from about 0.1% to about 90%, preferably from about 5% to about 60%, and more preferably from about 15% to about 40%, by weight, relative to the total weight of the composition, including all intermediate ranges and sub-ranges.

[0085] In a preferred embodiment, the solvent is not water and the nail composition is water-free or anhydrous.

[0086] Dye

[0087] According to preferred embodiments, nail compositions further comprising at least one colorant are provided. Any colorant typically found in nail polish compositions may be used. Suitable colorants include, but are not limited to, lipophilic dyes, pigments, pearlescent agents, glitter powder, and mixtures thereof.

[0088] Suitable examples of fat-soluble dyes are, for example, Sudan Red, DC Red 17, DC Green 6, [3-carotene, soybean oil, Sudan Brown, DC Yellow 11, DC Violet 2, DC Orange 5 and quinoline yellow.

[0089] Suitable pigments may be white or colored, inorganic and / or organic, and coated or uncoated. Examples of suitable inorganic pigments include titanium dioxide, optionally surface-treated, zirconium or cerium oxides, iron or chromium oxides, manganese violet, ultramarine blue, chromium hydrate, and ferric blue. Examples of suitable organic pigments include carbon black, D&C type pigments, and lakes based on cochineal carmine or barium, strontium, calcium, or aluminum, such as D&C Red Nos. 10, 11, 12, and 13, D&C Red No. 7, D&C Red Nos. 5 and 6, and D&C Red No. 34, as well as lakes such as D&C Yellow Lake No. 5 and D&C Red Lake No. 2.

[0090] Suitable pearlescent pigments may be chosen, for example, from white pearlescent pigments, such as mica coated with titanium dioxide or bismuth oxychloride, from colored pearlescent pigments, such as mica coated with titanium dioxide with iron oxides, mica coated with titanium dioxide with in particular ferric blue or chromium oxide, or mica coated with titanium dioxide with an organic pigment of the aforementioned type, and from pearlescent pigments based on bismuth oxychloride.

[0091] Preferably, if present, at least one colorant is present in the nail composition of the present invention in quantities of active material generally ranging from about 0.1% to about 10%, preferably from about 0.25% to about 7%, and more preferably from about 0.5% to about 3.5%, by weight, relative to the total weight of the nail composition, including all intermediate Auxiliaries / Additives ranges and sub-ranges.

[0092] The nail compositions of the present invention may further comprise an additive or auxiliary commonly used in cosmetic compositions and known to those skilled in the art as being suitable for incorporation into a nail polish or nail polish composition. These additives or auxiliaries may be selected from plasticizers, thickeners, preservatives, perfumes, oils, waxes, surfactants, antioxidants, free radical scavengers, spreading agents, wetting agents, dispersing agents, antifoaming agents, neutralizing agents, stabilizing agents, active ingredients selected from essential oils, UV protectants, sunscreens, moisturizing agents, vitamins, proteins, ceramides, plant extracts, fibers and the like, and mixtures thereof.

[0093] In a preferred embodiment, there are no UV curing agents in the nail composition. A UV curing agent comprises photocurable compounds and photoinitiators. The nail composition cures over time without any UV curing agent by UV light. The nail composition cures by evaporation of the solvent in an ambient atmosphere in less than 2 hours.

[0094] A person skilled in the art shall ensure that the optional additional additives and / or their quantity are selected so that the advantageous properties of the composition according to the invention are not, or not substantially, compromised by the envisaged addition.

[0095] These substances can be selected in various ways by a person skilled in the art in order to prepare a composition which has the desired properties, for example, consistency or texture.

[0096] These additives may be present in the composition in a proportion of 0% to 99% (such as 0.01% to 90%) relative to the total weight of the composition and furthermore such as 0.1% to 50% by weight (if present), including all intermediate ranges and sub-ranges.

[0097] It goes without saying that the composition of the invention must be cosmetically or dermatologically acceptable, that is to say, it must contain a physiologically acceptable, non-toxic carrier. The composition may be in any pharmaceutical form normally used in the cosmetic and dermatological fields that is suitable for topical administration to the nails.

[0098] Nail composition set

[0099] According to the present invention, a nail composition set comprising at least one colored coating and at least one varnish protector is proposed. The nail composition set of the present invention may further optionally include at least one primer base and / or at least one protective base.

[0100] It should be understood that each base or layer of the nail composition assembly may itself comprise one or more layers of each composition. Thus, at least one primer may comprise one or more layers of primer; at least one protective base coat may comprise one or more layers of protective base coat; at least one colored top coat may comprise one or more layers of colored top coat; and at least one varnish top coat may comprise one or more layers of varnish top coat. Preferably, each primer, protective base coat, colored top coat, and varnish top coat contains three or fewer layers or compositions, more preferably two or fewer layers or compositions, and most preferably a single layer or composition.

[0101] According to the present invention, the nail composition assembly is a nail composition comprising a dispersion of acrylic polymer particles according to the present invention. The other composition(s) of the nail composition assembly may be any composition suitable for application to nails. The varnish protector and / or the colored coating of the nail composition assembly may comprise a dispersion of acrylic polymer particles.

[0102] The present invention also relates to methods for improving the wear and shine of a nail composition comprising the addition of a dispersion of acrylic polymer particles and a base composition, wherein the addition of the dispersion of acrylic polymer particles and the base composition results in a nail composition having improved wear and shine properties. The wear and shine properties are improved compared to a composition that does not include a dispersion of acrylic polymer particles.

[0103] “Brillance” or “Brilliant” in the compositions of this document means Compositions having an average gloss, measured at 20°, greater than or equal to 35, for example 40, preferably 45, 55, 60, 65, 70, 75, 80, 85, or 90°, including all intermediate ranges and sub-ranges. "Gloss-enhancing agent" or "gloss-increasing agent" in accordance with the present invention means increasing gloss or, where appropriate, mitigating or reducing any gloss reduction that may result from the use of corresponding amounts of non-gloss-enhancing materials.

[0104] Improved wear reduces chipping of the nail composition after application to the nail. The components of the nail composition can improve adhesion to the nail after application and provide sufficient hardness to prevent chipping. The hardness can be between 30 and 60, preferably between 35 and 55 or between 40 and 50, including all intermediate ranges and sub-ranges, as measured with a Persoz hardness testing device.

[0105] According to such processes, preferably, the amount of acrylic polymer particle dispersion added to the nail composition is generally about 0.01% to about 20%, preferably about 1% to about 15%, and more preferably about 3% to about 10%, by weight, relative to the total weight of the composition, including all intermediate ranges and sub-ranges.

[0106] According to preferred embodiments of the present invention, nail makeup or protection methods are proposed, comprising the application to the nails of a nail composition comprising a dispersion of acrylic polymer particles on the nails in sufficient quantity to makeup or protect the nails.

[0107] The compositions according to the invention can be manufactured by known processes, generally used in the cosmetic or dermatological field.

[0108] Unless otherwise stated, all numbers expressing quantities of ingredients, reaction conditions, etc., used in the document and the claims shall be understood as modified in all cases by the term "approximately". Consequently, unless otherwise stated, the numerical parameters presented in the following document and the attached claims are approximations that may vary depending on the desired properties that one seeks to obtain through the present invention.

[0109] Although the numerical ranges and parameters presenting the broad scope of the invention are approximations, the numerical values ​​presented in the specific examples are reported as accurately as possible. However, every numerical value inherently contains some errors necessarily resulting from the standard deviation found in their respective measurements. The following examples are intended to illustrate the invention without thereby limiting its scope. Percentages are given on a weight basis. EXAMPLES

[0110] Measurement of the properties of the nail composition

[0111] Gloss or shine is measured using a gloss measuring device, For example, by spreading a layer of the composition to be tested, between 50 µm and 150 µm thick, onto a white Leneta contrast card using an automatic spreading device. The residual tacky layer is removed with lint-free cotton saturated in an alcohol-based solvent, and then the gloss is measured at 20° and 60° using a Byk Gardner microTRI-GLOSS gloss meter. reference. This measurement is repeated at least three times, and the average gloss in GU (gloss units) is the average of the at least three measurements taken.

[0112] Elongation, tensile strength, and Young's modulus are measured using dynamic mechanical analysis (DMA) with the tensile test method. The sample is prepared by coating the formula onto a polypropylene (PP) plate with a film thickness between 50 µm and 150 µm. The deposited film is air-dried for 24 hours. After drying, the test sample is cut into a long strip and mounted in the tensile clamp for the elongation test. The test is carried out at 37°C with an elongation rate of 300% per minute. The tensile test data are shown below as an example. Young's modulus and elongation at break (fracture strain reading) are calculated from the graph in [Fig. 1].

[0113] Preparation of the dispersion of acrylic polymer particles

[0114] An example of the dispersion of acrylic polymer particles was carried out by the following process.

[0115] In a first step, 1300 g of isododecane, 337 g of isobornyl acrylate, 28 g of methyl acrylate, and ethyl acrylate were placed in a reactor. The mass ratio of isobornyl acrylate to methyl acrylate was [missing value]. The mixture was heated to 90 °C under argon with stirring. After 2 hours of reaction, 1430 g of isododecane were added to the reactor feed, and the mixture was heated to 90 °C.

[0116] In a second step, a mixture of 1376 g of methyl acrylate and 1376 g of isododecane was run for over 2 hours and 30 minutes, and the mixture was allowed to react for 7 hours. 3.3 liters of isododecane were then added, and some of the isododecane was evaporated to obtain a dry matter content of 50% by weight. A dispersion of methyl acrylate particles stabilized with a statistical copolymer stabilizer was obtained, containing 92% isobornyl acrylate and 8% methyl acrylate in isododecane.

[0117] The dispersion contains in total (stabilizer + particles) 80% methyl acrylate and 20% isobornyl acrylate.

[0118] The polymer particles of the dispersion have an average number size of about 160 nm.

[0119] The dispersion is stable after 7 days of storage at room temperature (25 °C).

[0120] The polymer / oil weight ratio is 1:1 in this particle dispersion of polymer.

[0121] The percentage by weight of the components in the acrylic polymer particles is indicated in Table 1.

[0122] [Table 1] Components by weight of acrylic polymer particles Component Monomer Percent by weight Stabilizer Isobornyl acrylate 20 C1-C4 (meth)acrylate polymer particles Methyl acrylate 10 Ethyl acrylate 60 Ethylene-unsaturated acid monomer Acrylic acid, 10

[0123] Examples 1 to 5

[0124] The dispersion of acrylic polymer particles was mixed with a colored coating base composition to form the nail composition. The dispersion was added directly to the base composition and mixed using a stock blender. Examples 1 to 5 are examples of different concentrations (0.2%, 0.5%, 1%, 3%, 5%) of the acrylic polymer particle dispersion added to the colored coating base composition to form the nail composition. The components of the colored coating base composition are shown in Table 2.

[0125] [Table 2] Components by weight of the basic composition Component Percentage by weight Solvent 70 Nitrocellulose 10 Tosylami epoxy resin 8 Plasticizer 9

[0126] Here is the composition of the varnish protector: Component Percentage by weight Solvent 78 Nitrocellulose 10 Other film-forming agent 5 to 6 Plasticizer 9

[0127] The presence of the dispersion of acrylic polymer particles in the nail composition increases gloss while maintaining a hardness between 30 and 50, as shown in Table 3. This is probably due to the strong mechanical properties of the C1-C4 alkyl (meth)acrylate particles, in combination with the shine-enhancing properties of the stabilizer and the improved adhesion properties of the ethylenically unsaturated acid monomer.

[0128] [Table 3] Properties of examples 1 to 5 Dispersion concentration Ex. 1 0.2% Ex. 2 0.5% Ex. 3 1% Ex. 4 3% Ex. 5 5% Gloss (20°) 61.5 61.1 63.1 65 68.7 Hardness 35 45 38 49 32

[0129] A colored coating was applied to a nail and allowed to dry. Then, a top coat with an added amount of acrylic polymer particle dispersion was applied over the colored coating and allowed to dry. The gloss and wear of the colored coating with the top coat and acrylic polymer particle dispersion were monitored over a period of 10 days. A comparative example of the same colored coating and top coat applied but without acrylic polymer particle dispersion was also monitored.

[0130] [Table 4] Performance of examples 1 to 5 Dispersion concentration Ex. 1 0.2% Ex. 2 0.5% Ex. 3 1% Ex. 4 3% Ex. 5 5% Application = = = = = Wear on day 7 = + + = = Gloss on day 7 — — + + + Wear on day 10 = = + + + Gloss on day 10 — — + + +

[0131] Table 4 shows the performance of the nail compositions after 10 days compared to the comparative example. An equals sign (=) indicates that the nail composition has similar performance to the comparative example. A plus sign (+) indicates that the nail composition performs better than the comparative example. In the case of wear, better performance means less chipping, and in the case of shine, better performance means that shine is maintained after 10 days.

[0132] The addition of 0.2% of the acrylic polymer particle dispersion resulted in no difference compared to the comparator example, and 0.5% improved wear only for up to 7 days. Examples 3 to 5, with added dispersions of 1%, 3%, and 5% of acrylic polymer particles, improved the shine and wear of the nail composition for a period of 10 days. More than 5% of the acrylic polymer particle dispersion in the composition causes incompatibility with the base composition. Less than 1% of the acrylic polymer particle dispersion in the composition does not result in improved shine due to the low concentration.

Claims

Demands

1. Nail composition, preferably an anhydrous composition, comprising: a base composition; and 1% to 15% by weight relative to the total weight of the nail composition, of an acrylic polymer particle dispersion; and 2% to 60% by weight of nitrocellulose; wherein the acrylic polymer particle dispersion is a dispersion of C1-C4 alkyl (meth)acrylate polymer particles, preferably of methyl acrylate and / or ethyl acrylate polymer particles, stabilized with a stabilizer in a hydrocarbon oil, wherein the stabilizer is selected from the group consisting of: isobornyl (meth)acrylate homopolymers; and random copolymers of isobornyl (meth)acrylate and C1-C4 alkyl (meth)acrylate, and preferably selected from the group consisting of isobornyl acrylate homopolymers; statistical copolymers of isobotyl acrylate / methyl acrylate;statistical copolymers of isobornyl acrylate / methyl acrylate / ethyl acrylate; and wherein the nail composition does not comprise UV sand-cured material; and wherein the nail composition is a varnish protectant or a coloured coating.

2. Nail composition according to claim 1, wherein the polymer of the particles is present in the dispersion in a content from 21% to 58.5% by weight relative to the total weight of the dispersion.

3. Nail composition according to claim 1, comprising 0.01 to 20% by weight of the dispersion of acrylic polymer particles relative to the total weight of the composition.

4. Nail composition according to claim 1, wherein the acrylic polymer particles comprise 50 to 95 wt% of ethyl acrylate and 5 to 50 wt% of methyl acrylate.

5. Nail composition according to claim 1, wherein the acrylic polymer particles further comprise an ethylenically unsaturated acid monomer or an anhydride of this, preferably a monomer of an ethylenically unsaturated acid selected from the group consisting of crotonic acid, itaconic acid, fumaric acid, maleic acid, maleic anhydride, styrenesulfonic acid, vinylbenzoic acid, vinylphosphoric acid, acrylic acid, methacrylic acid, acrylamidopropanesulfonic acid, acrylamidoglycolic acid, and their salts

6. Nail composition according to claim 1, wherein the acrylic polymer particles comprise 80% to 100% by weight of C1-C4 alkyl (meth)acrylate and 0 to 20% by weight of an ethylenically unsaturated acid monomer, relative to the total weight of the acrylic polymer particles.

7. A nail composition according to claim 1, wherein the acrylic polymer particles are at least one selected from the group consisting of: methyl acrylate homopolymers; ethyl acrylate homopolymers; methyl acrylate / ethyl acrylate copolymers; methyl acrylate / ethyl acrylate / acrylic acid copolymers; methyl acrylate / ethyl acrylate / maleic anhydride copolymers; methyl acrylate / acrylic acid copolymers; ethyl acrylate / acrylic acid copolymers; methyl acrylate / maleic anhydride copolymers; and ethyl acrylate / maleic anhydride copolymers.

8. Nail care kit or set comprising the nail care kit according to claim 1.

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