Improved lipstick

Abstract

To provide an improved lipstick, a method for preparation thereof, and a method for improving the hardness, cutting resistance, and / or anti-running property of a lipstick.SOLUTION: A lipstick comprises: at least 30 mass% of an emollient including at least isocetyl isoarachidol; at least 30 mass% of a viscosifying agent; at least 0.1 mass% of a coloring agent; and at least 0.05 mass% of an antioxidant, wherein the quantity of isocetyl isoarachidol is at least 10 mass%, and the mass percentages are based on the mass of the lipstick.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a lipstick having improved hardness and / or anti-running / feathering properties, a method for making such a lipstick, and a method for improving the hardness and / or anti-running / feathering properties of a lipstick. [Background technology]

[0002] Lipstick has been used for many years to impart color to the lips.

[0003] Hardness is one of the main physical properties of a lipstick, as a firm, consistent lipstick affects its application to the lips: a lipstick that is too hard will give poor results, and a lipstick that is too soft will crumble or not hold its shape when applied.

[0004] Flow-resistance or low feathering is also an important property as it prevents feathering or wicking of the product into the creases of the skin around the lips.

[0005] Lipstick is the world's most popular cosmetic product with an expanding market share.

[0006] Therefore, much development is still underway to further improve the properties of lipsticks. Summary of the Invention [Problem to be solved by the invention]

[0007] In particular, there is a need for compounds that advantageously improve one or all of the following technical effects: - Lipstick hardness; - cutting resistance of lipstick; - Lipstick run-resistant. [Means for solving the problem]

[0008] Applicants have surprisingly discovered that certain emollients can improve the firmness of a lipstick, improve the cut properties, and / or prevent feathering (run resistance).

[0009] The present invention therefore relates to a lipstick comprising: - an emollient comprising at least 30% by weight of at least isoacetylisoarachidol; - at least 30% by weight of a viscosity imparting agent; - at least 0.1% by weight of colorant; - at least 0.05% by weight of an antioxidant; wherein the amount of isocetyl isoarachidol is at least 10% by weight; Weight percentages are based on the weight of the lipstick. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Lipstick is a solid product, especially in the form of a stick.

[0011] Isocetylisoarachidol is a branched alcohol containing 36 carbon atoms.

[0012] Preferably the amount of isocetyl isoarachidol is 12% by weight based on the weight of the lipstick.

[0013] Preferably, the amount of isocetyl isoarachidol is up to 30% by weight, more preferably up to 25% by weight, based on the weight of the lipstick.

[0014] Preferably, the amount of isocetyl isoarachidol is from 10 to 30% by mass, for example from 12 to 30% by mass, more preferably from 12 to 25% by mass, based on the mass of the lipstick.

[0015] In this application, all numerical ranges used are to be understood as inclusive of the limits, unless otherwise specified.

[0016] Preferably, the emollient other than isocetyl isoarachidol is selected from the group consisting of pentaerythritol tetraisostearate, caprylic / capric triglyceride, triethylhexanoin, vegetable oils such as castor oil, mineral oil, liquid paraffin fractions, tetrahydrofurfuryl alcohol and its esters, polyalkylene glycols and their esters, propylene glycol esters such as propylene glycol monolaurate and propylene glycol monostearate, fatty esters of lower alcohols such as isopropyl myristate, glycerol monostearate, lanolin, petrolatum, and mixtures thereof.

[0017] Preferably, the amount of the emollient, ie, the emollient comprising isocetyl isoarachidol, is at least 35% by weight, more preferably at least 40% by weight, based on the weight of the lipstick.

[0018] Preferably the amount of emollient is up to 65% by weight, more preferably up to 60% by weight, even more preferably up to 55% by weight, based on the weight of the lipstick.

[0019] Preferably, the amount of emollient is from 30 to 65% by weight, more preferably from 35 to 60% by weight, even more preferably from 35 to 55% by weight, based on the weight of the lipstick.

[0020] A tackifier is intended to mean a compound which, when used, thickens or thickens or hardens the composition without curing it.

[0021] Preferably, the viscosity imparting agent is selected from the group consisting of waxes, organophilic clays, silica, alkyl guar gum, silicone-based resins, maltodextrins, starches, fatty alcohols and their esters, such as cetearyl alcohol, cetyl alcohol, stearyl alcohol, palmitic alcohol, cetyl palmitate, triisostearin, myristyl myristate and myristyl stearate, plant-derived butters, such as Butyrospermum Parkii butter (shea butter), mango butter, mango seed butter, raspberry butter, avocado butter, olive butter, kuku butter, monoi butter, peach butter, pistachio butter, coconut butter, cocoa butter, pomegranate seed butter, rosehip butter, sunflower butter, wheat germ butter, apricot butter, babassu butter, and the like. butter, cupuacu butter, kokum butter, hazelnut butter, jojoba butter, sesame butter, soy butter, almond butter, meadowfoam seed butter, black current seed butter, and cranberry butter; and mixtures thereof.

[0022] The waxes can be of natural origin, such as beeswax, carnauba wax, candelilla wax, ouricoury wax, Japan wax, cork fiber wax or sugarcane wax, paraffin wax, lignite wax, microcrystalline wax, lanolin wax, montan wax, ozokerite, and hydrogenated oils, such as hydrogenated jojoba oil.

[0023] The waxes can be of synthetic origin, for example polyethylene waxes derived from the polymerization of ethylene, waxes obtained by Fischer-Tropsch synthesis, fatty acid esters and glyceride esters which are solid at 40° C. at atmospheric pressure.

[0024] Preferably, the wax is selected from the group consisting of Oryza Sativa Bran (Rice Bran) Wax, Euphorbia Cerifera (Candelilla) Wax, Cera Alba (Beeswax), and mixtures thereof.

[0025] More preferably, the thickening agent is selected from the group consisting of waxes; alkyl guar gum; maltodextrin; starch; plant derived butters such as butyrospermum parkii butter (shea butter), mango butter, mango seed butter, raspberry butter, avocado butter, olive butter, cuku butter, monoi butter, peach butter, pistachio butter, coconut butter, cocoa butter, pomegranate seed butter, rosehip butter, sunflower butter, wheat germ butter, apricot butter, babassu butter, cupuaçu butter, kokum butter, hazelnut butter, jojoba butter, sesame butter, soy butter, almond butter, meadowfoam seed butter, blackcurrant seed butter and cranberry butter; cetearyl alcohol; cetyl alcohol; stearyl alcohol; palmitic alcohol; cetyl palmitate; myristyl myristate; myristyl stearate; and mixtures thereof.

[0026] Preferably the amount of tackifier is at least 35% by weight, more preferably at least 40% by weight, based on the weight of the lipstick.

[0027] Preferably the amount of tackifier is up to 65% by weight, more preferably at least 60% by weight, based on the weight of the lipstick.

[0028] Preferably, the amount of the viscosity imparting agent is from 30 to 65% by mass, more preferably from 35 to 65% by mass, and even more preferably from 40 to 60% by mass, based on the mass of the lipstick.

[0029] The colorants are preferably chosen from among the colorants commonly used in the cosmetic field.

[0030] The colorant is preferably selected from the group consisting of pigments, such as inorganic and organic pigments, dyes, and mixtures thereof.

[0031] Pigments are natural or synthetic substances intended to color and / or opacify.

[0032] The pigments can be selected from among the pigments commonly used in the cosmetic field.

[0033] Each pigment can be white or colored, inorganic or organic, coated or uncoated, regular or nanometer size.

[0034] Examples of inorganic pigments are titanium dioxide; iron oxides, such as iron trioxide, iron tetroxide, and the like; mica; zinc oxide; chromium oxides, such as dichromium trioxide, and the like; barium sulfate, aluminum hydroxide, silver, magnesium carbonate, zirconium oxide, cerium oxide, manganese violet, ultramarine blue, chromium hydrate; and ferric blue.

[0035] Examples of organic pigments are carbon black, pigments of D&C type, and lakes based on cochineal carmine or based on barium, strontium, calcium or aluminium.

[0036] The pigment may be coated with a silicone compound, such as polydimethylsiloxane, a polymer, in particular polyethylene, a fluoro compound, and / or an amino acid. Mention may also be made of "SI oxide", which is a polymethyl-hydrogen siloxane coated pigment.

[0037] Pearlescent pigments are pigments coated with another inorganic or organic pigment. They can be white, such as mica coated with titanium dioxide or with bismuth oxychloride, or colored, such as mica coated with iron oxide, mica coated with titanium dioxide and ferric blue or chromium oxide, mica coated with organic pigments of the above types, etc.

[0038] Dyes are organic substances which can be natural or synthetic.

[0039] The dyes are preferably chosen from among the dyes commonly used in the cosmetics field, such as the red dyes CI 15850 (Red 6 Lake) and CI 45410 (Red 28 Lake).

[0040] Preferably, the amount of colorant is at least 0.5%, more preferably at least 1%, even more preferably at least 2% by weight based on the weight of the lipstick.

[0041] Preferably the amount of colourant is up to 30% by weight, more preferably up to 25% by weight, based on the weight of the lipstick.

[0042] Preferably, the amount of colorant is from 1 to 30% by weight, more preferably from 2 to 25% by weight, even more preferably from 2 to 20% by weight, based on the weight of the lipstick.

[0043] Preferably the lipstick comprises a mixture of colourants, in particular a mixture of contents.

[0044] The antioxidant can be selected from among the antioxidants commonly used in the cosmetic field.

[0045] Examples of antioxidants include acetylcysteine, ascorbic acid polypeptides, ascorbyl dipalmitate, ascorbyl methylsilanol pectinate, ascorbyl palmitate, ascorbyl stearate, BHA, BHT, t-butylhydroquinone, cysteine, cysteine ​​HCl, diamylhydroquinone, di-t-butylhydroquinone, dicetylthiodipropionate, dioleyl tocopheryl methylsilanol, disodium ascorbyl sulfate, distearyl thiodipropionate, ditridecylthiodipropionate, dodecyl gallate, erythorbic acid, esters of ascorbic acid, ethyl ferulate, ferulic acid, gallic acid esters, hydroquinone, isooctylthioglycolate, kojic acid, magnesium ascorbate, magnesium ascorbyl phosphate, methylsilanol ascorbate, natural plant antioxidants such as those found in green tea or The ingredients include grape seed extract, nordihydroguaiaretic acid, octyl gallate, phenylthioglycolic acid, potassium ascorbyl tocopheryl phosphate, potassium sulfite, propyl gallate, quinones, rosemarinic acid, sodium ascorbate, sodium bisulfite, sodium erythorbate, sodium metabisulfite, sodium sulfite, superoxide dismutase, sodium thioglycolate, sorbityl furfural, thiodiglycol, thiodiglycolamide, thiodiglycolic acid, thioglycolic acid, thiolactic acid, thiosalicylic acid, tocophereth-5, tocophereth-10, tocophereth-12, tocophereth-18, tocophereth-50, tocopherol, tocophersolan, tocopheryl acetate, tocopheryl linoleate, tocopheryl nicotinate, tocopheryl succinate, and tris(nonylphenyl) phosphite.

[0046] Preferably, the amount of antioxidant is at least 0.1%, more preferably at least 0.15%, even more preferably at least 0.2% by weight, based on the weight of the lipstick.

[0047] Preferably, the amount of antioxidant is up to 1% by weight, more preferably up to 0.8% by weight, based on the weight of the lipstick.

[0048] Preferably, the amount of antioxidant is from 0.05 to 1% by weight, more preferably from 0.1 to 1% by weight, for example from 0.15 to 1% by weight, even more preferably from 0.2 to 0.8% by weight, based on the weight of the lipstick.

[0049] Advantageously, the lipstick according to the invention comprises: - 30 to 65% by weight of an emollient containing at least isocetyl isoarachidol; - 30-65% by weight of a viscosity imparting agent; - 0.1-30% by weight of colorants; - 0.05 to 1% by weight of antioxidants; wherein the amount of isocetyl isoarachidol is 10 to 30% by mass; The weight percentages are based on the weight of the lipstick.

[0050] Advantageously, the lipstick according to the invention further comprises a flavoring agent and / or an organic UV filter.

[0051] Examples of flavoring agents that may be added to the lipstick according to the invention are cosmetic blends designated by INCI Aroma, or sweeteners such as glycyrrhizin and its salts, erythritol, Stevia Rebaudiana Extract, sugars, etc.

[0052] Preferably the amount of flavouring agent is at least 0.1% by weight, more preferably at least 0.2% by weight, based on the weight of the lipstick.

[0053] Preferably the amount of flavouring agent is at most 1% by weight, more preferably at most 0.8% by weight, based on the weight of the lipstick.

[0054] Preferably, the amount of the flavoring agent is from 0.1 to 1% by mass, more preferably from 0.2 to 0.8% by mass, based on the mass of the lipstick.

[0055] Examples of organic UV filters that can be added to the lipstick according to the invention are ethylhexyl methoxycinnamate, octocrylene, butyl methoxydibenzoylmethane, benzophenone-3, diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and ethylhexyl triazone.

[0056] Preferably, the amount of organic UV filter is at least 0.1% by weight, more preferably at least 0.5% by weight, based on the weight of the lipstick.

[0057] Preferably, the amount of organic UV filters is at most 30% by weight, more preferably at most 25% by weight, even more preferably at most 22.8% by weight, based on the weight of the lipstick.

[0058] Preferably, the amount of the organic UV filter is from 0.1 to 30% by mass, more preferably from 0.5 to 25% by mass, based on the mass of the lipstick.

[0059] Particularly preferred lipsticks according to the present invention include: - 35 to 55% by weight of an emollient containing at least isocetyl isoarachidol; - 40-60% by weight of a viscosity imparting agent; - 2 to 25% by weight of colorant - 0.2-0.8% by weight of antioxidants; - optionally 0.1 to 1% flavoring agent; - optionally 0.1 to 22.8% by weight of an organic UV filter; wherein the amount of isocetyl isoarachidol is 10 to 30% by mass; The weight percentages are based on the weight of the lipstick.

[0060] The lipstick may further comprise active agents other than antioxidants. These may include compounds having a cosmetic and / or dermatological effect, especially on the lips. These active additives may be hydrophobic or hydrophilic and may be selected from the group consisting of skin relaxants, agents stimulating the synthesis of dermal or epidermal macromolecules and / or preventing their degradation, anti-glycation agents, anti-irritation agents, moisturizing agents, such as polyhydric alcohols and water-soluble alkoxylated nonionic polymers, desquamating agents, pigmentation modifying agents, NO-synthase inhibitors, fibroblast proliferation stimulators or keratinocytes and / or keratinocyte differentiation, anti-pollution or anti-radical agents, soothing agents, agents acting on the microcirculation, agents acting on the energy metabolism of cells, healing agents, and mixtures thereof.

[0061] The amount of active agents other than antioxidants may be up to 5% by weight, based on the weight of the lipstick.

[0062] The lipstick may contain a preservative and / or a humectant.

[0063] More specifically, the preservative is selected from the group consisting of phenoxyethanol, glycol ethers, benzoic acid, sorbic acid, salicylic acid, glycols, parabens, thiazolinones, ethylhexylglycerin, aldehydes, and mixtures thereof.

[0064] Preferably, the humectant is polyglyceryl-3 diisostearate.

[0065] Preferably, the lipstick is water-free.

[0066] More specifically, the lipstick contains less than 1% by weight water, preferably less than 0.5% by weight water, and more preferably is free of water.

[0067] In a first aspect, the present invention provides a lipstick that does not contain an oil gelling agent selected from the group consisting of dextrin fatty acid esters, polysaccharide fatty acid esters, clay minerals modified with an organic compound, 12-hydroxystearic acid, and alkyl glutamides, such as dibutyl ethylhexanoyl glutamide and dibutyl lauroyl glutamide.

[0068] In a second aspect, the present invention provides a lipstick that is free of ethylcellulose polymers.

[0069] Ethyl cellulose polymers are derivatives of cellulose in which some of the hydroxyl groups on the repeating glucose units have been converted to ethoxyl groups. In particular, ethyl cellulose polymers are represented by formula (I): [ka] During the ceremony, - R 1 , R 2 and R 3 are the same or different and represent H or CH2CH3, - n is at least 2.

[0070] In a third aspect, the present invention provides a lipstick that is free of dimer diol.

[0071] Dimer diols, as known to those skilled in the art, are mixtures of cyclic and non-cyclic isomers. They are usually obtained by dimerization of unsaturated fatty acid(s) or their ester(s) followed by reduction of the respective acid or ester group to a hydroxyl group, or by dimerization of unsaturated fatty alcohol(s).

[0072] Preferably, the unsaturated fatty acid(s) or ester(s) thereof and the unsaturated fatty alcohol(s) are monocarboxylic acid(s) or ester(s) and monoalcohol(s), respectively, with each hydrocarbon chain of the fatty acid(s) or fatty alcohol(s) containing 18 to 24, preferably 18 to 22 carbon atoms, and the dimer diol molecule contains 36 to 48, more preferably 36 to 44, carbon atoms, for example 36 carbon atoms.

[0073] In particular, the dimer diol is prepared from unsaturated fatty acid(s) or unsaturated fatty alcohol(s) containing 18 carbon atoms.

[0074] Preferably, the dimer diol comprises more than 50% by weight, more preferably more than 70% by weight, of non-cyclic isomers, where the weight percentage is based on the total weight of the dimer diol, by which is meant the weight of all dimer diol molecules.

[0075] In a fourth aspect, the present invention provides a lipstick that does not contain an oil gelling agent selected from the group consisting of dextrin fatty acid esters, polysaccharide fatty acid esters, clay minerals modified with an organic compound, 12-hydroxystearic acid, and alkyl glutamides, such as dibutyl ethylhexanoyl glutamide and dibutyl lauroyl glutamide, nor an ethyl cellulose polymer.

[0076] In a fifth aspect, the present invention provides a lipstick which does not comprise a dimer diol or an ethyl cellulose polymer.

[0077] In a sixth aspect, the present invention provides a lipstick which does not contain an oil gelling agent selected from the group consisting of dextrin fatty acid esters, polysaccharide fatty acid esters, clay minerals modified with an organic compound, 12-hydroxystearic acid, and alkyl glutamides, such as dibutyl ethylhexanoyl glutamide and dibutyl lauroyl glutamide, nor a dimer diol, nor an ethyl cellulose polymer.

[0078] Preferably, the lipstick according to the present invention provides improved hardness, cutting properties, and / or run resistance.

[0079] More preferably, lipsticks according to the present invention provide improved hardness, improved cutting properties and run resistance.

[0080] The present invention also relates to a method for producing a lipstick according to the invention, comprising the following steps: - i) mixing phase A with phase B; wherein Phase A comprises a viscosifier and an emollient; Phase B contains colorants dispersed in isocetyl isoarachidol; - ii) adding phase C to the mixture obtained from step i); Here, phase C contains an antioxidant.

[0081] The colorants of phase B are dispersed in isocetyl isoarachidol before being mixed with phase A. In particular, phase B can be passed through a tricylinder.

[0082] Preferably, phase A is heated until the compounds are melted.

[0083] Advantageously, in the process for producing a lipstick according to the invention, phase A is heated to a temperature of at least 40° C. before mixing.

[0084] Preferably, phase A is heated to a temperature of at least 60°C, more preferably at least 80°C.

[0085] Preferably, in step ii), said addition is carried out under mixing.

[0086] Advantageously, in the process for producing a lipstick according to the invention, step ii) is carried out at a temperature of at least 40°C.

[0087] Preferably, step ii) is carried out at a temperature of at least 50°C, for example 60°C.

[0088] Advantageously, the method of manufacturing a lipstick according to the invention further comprises the step of forming the lipstick.

[0089] Preferably, in the step of forming the lipstick, the resulting mixture of step ii) is poured into a lipstick mould.

[0090] The resulting mixture is at a temperature of at least 40°C, more preferably at least 50°C, and even more preferably at least 60°C.

[0091] The resulting mixture is then allowed to cool, preferably until the resulting mixture reaches a temperature of 20°C to 30°C.

[0092] The formed lipstick can then be demolded.

[0093] The present invention also relates to a method for improving the hardness, cut resistance, and / or run resistance of a lipstick, comprising using at least 10% by weight of isocetyl isoarachidol in the formulation of said lipstick, based on the weight of the lipstick.

[0094] The isocetyl isoarachidol and lipstick are as described above, including the preferred and advantageous features.

[0095] More specifically, Example 2.1 shows that replacing 20% ​​by weight of an emollient or thickener with isocetyl isoarachidol in a lipstick formulation results in a lipstick with improved firmness, where the weight percent is based on the weight of the lipstick.

[0096] The increase in hardness of the lipstick by replacing the emollient or viscosity imparting agent with isocetyl isoarachidol is preferably at least 10%, more preferably at least 15%, and even more preferably at least 20%.

[0097] Example 2.2 shows that replacing 20% ​​by weight of an emollient with isocetyl isoarachidol in a lipstick formulation results in a lipstick with improved cut properties, where the weight percentage is based on the weight of the lipstick.

[0098] The improvement in cut resistance of a lipstick by replacing an emollient or viscosity imparting agent with isocetyl isoarachidol is at least 10%, more preferably at least 15%, and even more preferably at least 20%.

[0099] Example 2.3 shows that replacing 20% ​​by weight of an emollient with isocetyl isoarachidol in a lipstick formulation results in a lipstick with improved run resistance, where the weight percent is based on the weight of the lipstick.

[0100] The improvement in run resistance of the lipstick is characterized by a reduction in the pigment coverage of the lipstick by at least 10%, preferably at least 15%, and more preferably at least 20% by replacing the emollient or thickener with isocetyl isoarachidol.

[0101] Advantageously, in the method according to the invention, the lipstick comprises: - 20 to 55% by weight of an emollient other than isocetyl isoarachidol; - 30-65% by weight of a viscosity imparting agent; - 0.1-30% by weight of colorants; - 0.05 to 1% by weight of antioxidants; - optionally 0.1 to 1 flavoring agent; - optionally 0.1 to 22.8% by weight of an organic UV filter; Weight percentages are based on the weight of the lipstick. EXAMPLES

[0102] The invention is further described in the following examples, which are given by way of illustration.

[0103] Chemicals used in the examples - Emollients: - Isocetyl isoarachidol: Radiastar 1436 from Oleon; - C12-15 alkyl benzoates: Finsolv TN from Innospec; - Octidodecanol: Radiastar 1420 from Oleon; - Caprylic / capric triglyceride: Radia 7104 from Oleon; - Triethylhexanoin: Radia 7610 from Oleon; - Pentaerythritol tetraisostearate: Jolee 7181 from Oleon; - Viscosifier: - Oryza Sativa Bran (Rice Bran) Wax from Kerfoot; - Euphorbia Cerifera (Candelilla) Wax: Candelilla wax from Kerfoot; - Serra Alba: Beeswax organic from Kerfoot; - Myristyl myristate: Radia 7744 from Oleon; - Cetearyl Alcohol: Ecorol 68 / 30 from Ecogreen; - Cetyl Palmitate: Radia 7500 from Oleon; - Butyrospermum persica butter from Kerfoot (Shea butter); - Triisostearin: Radia 7373 from Oleon; - Wetting agent: - Polyglyceryl-3 diisostearate: Jolee 7245 from Oleon; - Colorants: - White: - Cl 77891 (titanium dioxide): Kronos 1171 from Kronos (average particle size: 136.8-140.8 nm); - Red: - Cl 45410 (Red 28): Unipure Red LC328 from Sensient Beauty; - Cl 77491 (iron dioxide) and jojoba esters: BRO-NJE2 from Kobo; - CI 77019 (mica), Cl 77891 and CI 77491: KT-6213 from Kolortek; - Cl 15850 (Red 6): Unipure Red LC304 from Sensient Beauty; - Liquid organic UV filters: - Ethylhexyl methoxycinnamate: Eusolex 2292 from Merck; - Antioxidants: - Tocopheryl Acetate: Vitamin E from BASF; - Flavoring agents: - Aroma: strawberry emulsifier from Green House Ingredients.

[0104] Example 1: Lipstick 1.1. Lipstick L1 The chemicals and their amounts are set forth in Table 1 below. This lipstick was made by the following steps. Phase A was prepared by introducing the corresponding ingredients into a main beaker under stirring until good homogenization. Phase A was then heated to 80° C. until melted. Phase B was prepared by introducing the corresponding components into a separate beaker under stirring until good homogenization. Phase B was then passed three times through a tri-cylinder. Phase B was added to Phase A under stirring at 60°C. Phase C was prepared by mixing the corresponding ingredients together at room temperature. Phase C was then added to the mixture of Phases A and B under stirring at 60° C. until homogenous. The formulation was then poured into a mold and allowed to cool at room temperature before demolding.

[0105] [Table 1]

[0106] 1.2. Lipstick L2 The chemicals and their amounts are set forth in Table 2 below. The lipstick was prepared according to the method described in Example 1.1.

[0107] [Table 2]

[0108] Example 2: Lipstick Properties 2.1.Hardness Hardness is a measure of the resistance of a substance, here lipstick, to the penetration of a foreign object, here a cylindrical probe. Hardness was measured with a Lloyd Instruments / Ametek TA1 Texture Analyzer and Nexygen Plus V3 software using the following characteristics: 12mm diameter probe cylinder, 113.1mm 2probe area of ​​0.2N (zero point), preload of 0.2N (zero point), zero point speed of 100mm / min, measurement speed of 20mm / min, depth of 5mm, force max of 50N and temperature of 22°C. The results are shown in Table 3 below.

[0109] [Table 3]

[0110] The hardness values ​​obtained with the lipsticks according to the invention (L1 and L2) are higher than those of the respective comparative lipsticks (CL1 and CL2 for L1; CL3 and CL4 for L2), which means that isocetyl isoarachidol makes it possible to improve the hardness of the lipstick without the addition of further waxes. Lipsticks L1 and L2 exhibit good hardness and are hard enough to allow distribution of the product on the lips without crumbling. L2 had a creamy texture as indicated by its low hardness value.

[0111] 2.2. Cutting resistance average force Cutting Resistance Mean Force is a test that evaluates the firmness of a lipstick based on the resistance the stick offers to the penetration of a cutting wire probe. The cut resistance average force was measured with a Lloyd Instruments / Ametek TA1 Texture Analyzer and Nexygen Plus V3 software using the following characteristics: Wire probe with diameter 0.3 mm, preload of 0.2 N (zero point), zero point speed of 100 mm / min, measuring speed of 20 mm / min, depth of 5 mm, force max of 50 N and temperature of 22°C. The lipstick had a diameter of approximately 1.3 cm. The results are shown in Table 4 below.

[0112] [Table 4]

[0113] The cut resistance mean force values ​​obtained with the lipstick according to the invention are higher than the cut resistance mean force values ​​of each of the comparative lipsticks, which means that isocetyl isoarachidol makes it possible to improve the cut resistance of the lipstick without the addition of further waxes.

[0114] Lipsticks L1 and L2 exhibit good cut resistance, which means that the lipstick according to the invention does not fall apart during normal handling, especially during the sliding action of inserting or extracting the lipstick from its plastic tube, which can cause the lipstick to break at the end of the tube.

[0115] 2.3. Flow resistance The run-resistance of a lipstick refers to the pigment spreading into the fine lines around the lips, which can result in a loss of definition of the designed line when the lipstick is applied to the lips. This also means that bleeding is reduced. The run resistance of each lipstick was measured by a wet spread test in which the product was applied to a defined surface of 50.0 mm of a piece of paper and the final diameter was measured after 20 minutes at 37° C. The results, shown in Table 5 below, are expressed as the percentage difference between the initial diameter and the final diameter.

[0116] [Table 5]

[0117] It can be seen that lipstick L2 has the lowest percentage difference between the areas compared to the other lipsticks Cl3 to CL4 that do not contain isocetyl isoarachidol. It can be concluded that the presence of isocetyl isoarachidol in the lipstick improves the run-resistance of the lipstick.

[0118] 2.4.Glossiness The gloss of the lipstick was measured using a Courage Kazaka glossmeter GL200 probe for MDD4. The results are shown in Table 6 below.

[0119] [Table 6]

[0120] All lipsticks exhibited good gloss properties. The average gloss values ​​obtained with the lipsticks according to the invention were comparable to or higher than the average gloss values ​​of the comparative lipsticks, which means that isocetyl isoarachidol makes it possible to improve the gloss of the lipstick.

Claims

1. Lipsticks containing: - at least 30% by weight of an emollient comprising at least isocetylisoarachidol; - at least 30% by weight of a viscosifier; - at least 0.1% by weight of a colorant; - at least 0.05% by weight of an antioxidant; wherein the amount of isocetyl isoarachidol is at least 10% by weight; The weight percentages are based on the weight of the lipstick.

2. 10. The lipstick of claim 1 comprising: - 30 to 65% by weight of an emollient comprising at least isocetyl isoarachidol; - 30 to 65% by weight of a viscosity imparting agent; - 0.1 to 30% by weight of a colorant; - 0.05 to 1% by weight of an antioxidant; wherein the amount of isocetyl isoarachidol is 10-30% by weight; The weight percentages are based on the weight of the lipstick.

3. 3. The lipstick according to claim 1 or 2, further comprising a flavouring agent and / or an organic UV filter.

4. A method for producing a lipstick according to any one of claims 1 to 3, comprising the steps of: i) mixing phase A with phase B, wherein said Phase A comprises a viscosifier and an emollient; Phase B comprises a colorant dispersed in isocetyl isoarachidol; - ii) adding phase C to the mixture obtained from step i), Here, said phase C comprises an antioxidant.

5. A method of making a lipstick according to claim 4, wherein said phase A is heated to a temperature of at least 40°C prior to mixing.

6. A method for producing a lipstick according to claim 4 or 5, wherein step ii) is carried out at a temperature of at least 40°C.

7. The method of any one of claims 4 to 6, further comprising the step of forming the lipstick.

8. 1. A method for improving the hardness, cut resistance and / or run resistance of a lipstick, comprising using at least 10% by weight of isocetyl isoarachidol in the formulation of said lipstick, based on the weight of said lipstick.

9. 9. The method of claim 8, wherein the lipstick comprises: from 20 to 55% by weight of an emollient other than isocetyl isoarachidol; - 30 to 65% by weight of a viscosity imparting agent; - 0.1 to 30% by weight of a colorant - 0.05 to 1% by weight of an antioxidant; - optionally 0.1 to 1 flavoring agent; optionally from 0.1 to 22.8% by weight of UV filters; The weight percentages are based on the weight of the lipstick.

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