Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/046—Aerosols; Foams
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/31—Hydrocarbons
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/817—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)
  • A61K8/8182—Copolymers of vinyl-pyrrolidones. Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q15/00—Anti-perspirants or body deodorants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/30—Characterized by the absence of a particular group of ingredients
  • A61K2800/31—Anhydrous

Definitions

• Anhydrous antiperspirant composition in aerosol form comprising an antiperspirant active agent and a vinylpyrrolidone-derived polymer
• the present invention relates to an anhydrous antiperspirant composition in aerosol form comprising, in a physiologically acceptable, in particular cosmetically acceptable, medium, i) an oily phase comprising:
• At least one antiperspirant active agent chosen from aluminium and/or zirconium salts or complexes
• Another subject of the invention is a cosmetic process for treating human perspiration, and optionally the body odours associated with human perspiration, especially underarm odours, comprising the application of said composition to a surface of the skin.
• the present invention also relates to the use of said cosmetic composition and also to an aerosol device using it.
• the armpits and also certain other parts of the body are generally the site of much discomfort that may arise directly or indirectly from perspiration.
• This perspiration often leads to unpleasant and disagreeable sensations that are mainly due to the presence of sweat resulting from perspiration, which may, in certain cases, make the skin clammy and clothing wet, especially in the region of the armpits or of the back, thus leaving visible marks.
• sweat may also leave salts and/or proteins on the surface of the skin, which thus results in whitish marks on clothing. Such discomfort is noticed, including in the case of moderate perspiration.
• antiperspirant products containing substances that have the effect of limiting or even preventing the flow of sweat in order to overcome the problems mentioned above.
• These products are generally available in the form of roll-ons, sticks, aerosols or sprays.
• Antiperspirant substances are generally composed of aluminium and/or zirconium salts or complexes, such as aluminium chloride and aluminium hydroxyhalides. These substances make it possible to reduce the flow of sweat.
• cosmetic compositions based on these antiperspirant substances generally have a tendency to become transferred onto clothing, leaving unsightly, visible marks.
• antiperspirant compositions containing oils with a refractive index close to those of aluminium salts have been developed.
• the role of such oils is to reduce the whitish appearance of antiperspirant compositions when they are deposited on the skin and, consequently, to make the marks on clothing less white.
• the oils used are generally fatty acid esters such as isopropyl myristate or polydimethylsiloxanes.
• Such compositions have especially been described in patents or patent applications EP 1362885, JP 030951 1 1 and FR 2242969.
• such antiperspirant compositions have the drawback of giving the skin, especially on the armpits, an oily sensation that is unpleasant for the user, and do not make it possible to limit the transfer of antiperspirant products from the skin onto clothing.
• an anhydrous composition in aerosol form containing an oily phase comprising at least one volatile oil, at least one antiperspirant active agent preferably chosen from aluminium and/or zirconium salts or complexes, at least one vinylpyrrolidone-derived polymer and at least one propellant, it was possible to minimize the problems of transfer of antiperspirant compositions onto fabrics while maintaining antiperspirant efficacy.
• the antiperspirant cosmetic composition in aerosol form in accordance with the invention leads to formulations which transfer less onto textiles, thus giving rise to fewer unsightly visible marks on clothing, especially on dark-coloured clothing, compared to a standard antiperspirant composition or an antiperspirant composition containing oils.
• the antiperspirant cosmetic composition makes it possible to significantly reduce the whitish marks on clothing, in particular on dark- coloured clothing.
• the cosmetic composition in aerosol form according to the invention maintains good antiperspirant efficacy.
• vinylpyrrolidone-derived polymers as described below in an antiperspirant composition based on aluminium salts makes it possible to reduce the transfer of unsightly visible marks onto clothing without harming the efficacy of the aluminium salts.
• the vinylpyrrolidone-derived polymers used prove to be compatible with the aluminium salts since they do not form a macroscopically visible precipitate in the composition.
• One subject of the present invention is thus especially an anhydrous composition in aerosol form, containing: i) an oily phase comprising:
• At least one antiperspirant active agent chosen from aluminium and/or zirconium salts or complexes
• the cosmetic composition according to the invention has both good transfer-resistance and antiperspirant properties.
• the present invention also relates to a cosmetic process for treating human perspiration, and optionally body odours associated with human perspiration, which consists in applying to the surface of a human keratin material an effective amount of the cosmetic composition as described previously.
• the process according to the invention is particularly advantageous for treating armpit perspiration, since the composition used does not give an unpleasant oily sensation and transfers less onto clothing, while at the same time efficiently treating perspiration.
• the invention also relates to the use of said composition cosmetically treating human perspiration.
• Other subjects, characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the examples that follow.
• physiologically acceptable medium is intended to denote a medium that is suitable for the topical administration of a composition.
• a physiologically acceptable medium is preferentially a cosmetically or dermatologically acceptable medium, i.e. a medium that has no unpleasant colour or appearance, and that is entirely compatible with the topical administration route.
• such a medium is considered in particular to be physiologically acceptable when it does not cause stinging, tightness or redness that is unacceptable to the user.
• anhydrous is intended to mean a liquid phase having a water content of less than 5% by weight, preferably less than 2% by weight and even more preferably less than 1 % by weight relative to the weight of said composition. It should be noted that the water in question is more particularly bound water, such as the water of crystallization in salts, or traces of water absorbed by the raw materials used in the production of the compositions according to the invention.
• human keratin materials is intended to mean the skin (of the body, face and around the eyes), hair, eyelashes, eyebrows, body hair, nails, lips or mucous membranes.
• final composition is intended to mean the combination of the liquid phase and of the propellant gas.
• antiperspirant active agent is intended to mean a salt which, by itself, has the effect of reducing the flow of sweat, of reducing the sensation on the skin of moisture associated with human sweat or of masking human sweat.
• the cosmetic composition comprises one or more antiperspirant active agents preferably chosen from aluminium and/or zirconium salts.
• aluminium salts or complexes mention may be made of aluminium halohydrates.
• aluminium salts mention may in particular be made of aluminium chlorohydrate, aluminium chlorohydrex, the aluminium chlorohydrex- polyethylene glycol complex, the aluminium chlorohydrex-propylene glycol complex, aluminium dichlorohydrate, the aluminium dichlorohydrex-polyethylene glycol complex, the aluminium dichlorohydrex-propylene glycol complex, aluminium sesquichlorohydrate, the aluminium sesquichlorohydrex-polyethylene glycol complex, the aluminium sesquichlorohydrex-propylene glycol complex, aluminium sulfate buffered with sodium aluminium lactate.
• Aluminium sesquichlorohydrate is especially sold under the trade name Reach 301® by the company Summitreheis.
• Aluminium chlorohydrate is in particular sold under the trade names Locron S FLA®, Locron P and Locron L.ZA by the company Clariant; under the trade names Microdry aluminium Chlorohydrate®, Micro-Dry 323®, Chlorhydrol 50, Reach 103 and Reach 501 by the company Summitreheis; under the trade name Westchlor 200® by the company Westwood; under the trade name Aloxicoll PF 40® by the company Guilini Chemie; Cluron 50%® by the company Industria Quimica Del Centra; or Clorohidroxido Aluminio SO A 50%® by the company Finquimica.
• Aluminium chlorohydrate aluminium sesquichlorohydrate and mixtures thereof will more particularly be used.
• the antiperspirant aluminium salts may be present in the final composition according to the invention in a content ranging from 0.5% to 25% by weight, preferably in a content ranging from 1 % to 20% and more particularly between 2% and 15% by weight relative to the total weight of the final composition.
• the polymer used within the context of the present invention may be defined as being a derivative of vinylpyrrolidone, more precisely either a copolymer of polyvinylpyrrolidone and a-olefins, or an alkylated polyvinylpyrrolidone derivative. These polymers are lipophilic.
• the polymer used in the composition according to the invention may especially be represented by the following formula (I):
• radicals R1 to R12 represent, independently of one another, a straight-chain or branched, saturated C10 to C40 alkyl radical or a hydrogen atom, at least one of said radicals R1 to R12 being other than a hydrogen atom.
• the value of y may be equal to 0; x must not be zero.
• the polymer used within the context of the invention preferably has at least one radical R comprising 14 to 32 carbon atoms, preferentially from 14 to 26 carbon atoms, and more preferentially from 14 to 22 carbon atoms.
• alkyl radicals comprising 10 to 40 carbon atoms
• the weight-average molecular weight of the polymer according to the invention is preferably between 5000 and 30 000, in particular between 6000 and 20 000.
• y is equal to 0 and the radicals R2 to R5 represent hydrogen. At least one of the radicals other than hydrogen preferably comprises from 14 to 32 carbon atoms.
• triacontyl PVP CFA name: tricontyl PVP
• ANTARON WP660 the products sold by the company ISP under the name ANTARON WP660.
• y may not be zero.
• the radicals R1 to R9 and R1 1 and R12 preferably represent hydrogen.
• R10 preferably comprises from 14 to 32 carbon atoms, more preferably from 14 to 26 atoms and even more preferably from 14 to 22 carbon atoms, and the x/y ratio is preferably between 1/5 and 5/1 .
• CTFA name the PVP/hexadecene copolymer
• CTFA name the PVP/eicosene copolymer
• Antaron V-216 which is a PVP/hexadecene copolymer comprising approximately 15-23% of pyrrolidone units, with a molecular weight of 7300
• Antaron V-220 which is a PVP/eicosene copolymer which comprises approximately 20-28% by weight of pyrrolidone units and which has a weight- average molecular weight of 8600.
• the use of a vinylpyrrolidone- derived polymer as described above also makes it possible to provide, surprisingly and advantageously, the composition according to the invention with a "non-tacky" feel after application to the keratin materials and more particularly to the skin, especially in the underarm region.
• the polymer according to the invention has a consistency at room temperature which may be more or less viscous depending on the length of the alkyl chain. It may thus be in liquid form, having a viscosity of the order of 40 to 55 poises (4 to 5.5 Pa.s), in a more pasty form or else in solid form close to the consistency of a wax.
• the anhydrous composition comprises a single vinylpyrrolidone-derived polymer. In another embodiment of the invention, the anhydrous composition comprises a mixture of two or more vinylpyrrolidone-derived polymers.
• the vinylpyrrolidone-derived polymer according to the invention is preferably a "film-forming polymer", that is to say a polymer that is capable of forming, by itself or in the presence of an auxiliary film-forming agent, a continuous film that adheres to a support, especially to keratin materials such as the skin, the hair, the eyelashes or the nails, especially the skin.
• film-forming polymer that is to say a polymer that is capable of forming, by itself or in the presence of an auxiliary film-forming agent, a continuous film that adheres to a support, especially to keratin materials such as the skin, the hair, the eyelashes or the nails, especially the skin.
• the vinylpyrrolidone-derived polymer may be present in the final composition according to the invention in a content ranging from 0.1 to 20% of active material by weight, preferably in a content ranging from 0.5% to 10% by weight, more preferentially in a content ranging from 0.8% to 3% by weight, and even more preferentially ranging from 1 % to 2% by weight, relative to the total weight of the final composition.
• Oily phase The antiperspirant composition according to the invention comprises an oily phase, this phase containing at least one volatile oil.
• said oily phase may also comprise at least one non-volatile hydrocarbon-based oil.
• oil is intended to mean a fatty substance which is liquid at room temperature (25°C) and atmospheric pressure (760 mmHg, i.e. 10 5 Pa).
• the oil may be volatile or non-volatile.
• volatile oil is intended to mean an oil that is capable of evaporating on contact with the skin or the keratin fibre in less than one hour, at room temperature and atmospheric pressure.
• the volatile oils of the invention are volatile cosmetic oils which are liquid at room temperature with a non-zero vapour pressure, at room temperature and atmospheric pressure, ranging in particular from 0.13 Pa to 40 000 Pa (10 "3 to 300 mmHg), in particular ranging from 1 .3 Pa to 13 000 Pa (0.01 to 100 mmHg) and more particularly ranging from 1 .3 Pa to 1300 Pa (0.01 to 10 mmHg).
• non-volatile oil is intended to mean an oil that remains on the skin or the keratin fibre at room temperature and atmospheric pressure for at least several hours, and that especially has a vapour pressure strictly less than 10 "3 mmHg (0.13 Pa).
• hydrocarbon-based oil is intended to mean an oil mainly containing carbon and hydrogen atoms and optionally one or more functions chosen from hydroxyl, ester, ether and carboxylic functions.
• the oil has a viscosity of from 0.5 to 100 000 mPa.s, preferably from 50 to 50 000 mPa.s and more preferably from 100 to 300 000 mPa.s.
• liquid phase or “fluid” is intended to mean the base of the composition without the propellant.
• the volatile oil is chosen from volatile hydrocarbon-based oils and volatile silicone oils, or mixtures thereof.
• volatile hydrocarbon-based oil that can be used in the invention, mention may be made of: - volatile hydrocarbon-based oils chosen from hydrocarbon-based oils containing from 8 to 16 carbon atoms, and especially Cs-Ci6 isoalkanes of petroleum origin (also known as isoparaffins), for instance isododecane (also known as 2,2,4,4,6-pentamethylheptane), isodecane and isohexadecane, for example the oils sold under the trade names Isopar or Permethyl, branched Cede esters, isohexyl neopentanoate, and mixtures thereof.
• Use may also be made of other volatile hydrocarbon-based oils, such as petroleum distillates, especially those sold under the name Shell Solt by Shell; volatile linear alkanes, such as those described in patent application DE10 2008 012 457 from Cognis.
• volatile silicone oils that may be used in the invention, mention may be made of: volatile linear or cyclic silicone oils, especially those with a viscosity ⁇ 8 centistokes (8x10 "6 m 2 /s) and especially having from 2 to 7 silicon atoms, these silicones optionally comprising alkyl or alkoxy groups having from 1 to 10 carbon atoms.
• volatile silicone oil that may be used in the invention, mention may be made especially of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and dodecamethylpentasiloxane;
• R represents an alkyl group comprising from 2 to 4 carbon atoms, one or more hydrogen atoms of which may be substituted by a fluorine or chlorine atom.
• the proportion of volatile oil(s) relative to the total amount of oils preferably ranges from 50% to 100% by weight.
• the volatile oils are chosen from hydrocarbon-based oils and more particularly Cs-Ci6 isoalkanes such as isododecane or isohexadecane, or linear Cs-Ci6 alkanes such as an undecane/tridecane mixture.
• the oily phase also comprises at least one non-volatile oil.
• the non-volatile oils may be chosen from hydrocarbon-based oils, silicone oils and fluoro oils, and mixtures thereof.
• Non-volatile hydrocarbon-based oils may be chosen from hydrocarbon-based oils, silicone oils and fluoro oils, and mixtures thereof.
• non-volatile hydrocarbon-based oils that may be used in the invention, mention may be made of:
• hydrocarbon-based plant oils such as liquid triglycerides of fatty acids having 4 to 24 carbon atoms, for instance heptanoic or octanoic acid triglycerides, or else wheatgerm oil, olive oil, sweet almond oil, palm oil, rapeseed oil, cottonseed oil, alfalfa oil, poppy oil, pumpkin oil, marrow oil, blackcurrant oil, evening primrose oil, millet oil, barley oil, quinoa oil, rye oil, safflower oil, candlenut oil, passionflower oil, musk rose oil, sunflower oil, corn oil, soybean oil, grapeseed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, castor oil, avocado oil, caprylic/capric acid triglycerides, for instance those sold by the company Stearineries Dubois or those sold under the names Miglyol 810, 812 and 818 by the company Dynamit Nobel, jojob
• hydrocarbons of mineral or synthetic origin such as liquid paraffins and their derivatives, petrolatum, polydecenes, polybutenes, hydrogenated polyisobutene, such as Parleam, or squalane;
• - synthetic esters especially of fatty acids, for instance the oils of formula R1COOR2 in which Ri represents the residue of a linear or branched higher fatty acid comprising from 1 to 40 carbon atoms and R2 represents a hydrocarbon-based chain, which is especially branched, containing from 1 to 40 carbon atoms, with Ri + R 2 > 10, for instance purcellin oil (cetostearyl octanoate), isononyl isononanoate, isopropyl myristate, isopropyl palmitate, C12 to Ci5 alkyl benzoate, hexyl laurate, diisopropyl adipate, 2-ethylhexyl palmitate, 2-octyldodecyl stearate, 2-octyldodecyl erucate, isostearyl isostearate or tridecyl trimellitate; alcohol or polyalcohol octanoates, decanoates or
• - fatty alcohols which are liquid at room temperature, comprising a branched and/or unsaturated carbon chain having from 12 to 26 carbon atoms, such as octyldodecanol, isostearyl alcohol, 2-butyloctanol, 2-hexyldecanol, 2- undecylpentadecanol or oleyl alcohol; - higher fatty acids, such as oleic acid, linoleic acid or linolenic acid;
• non-volatile silicone oils that may be used in the invention, mention may be made of: silicone oils, for instance linear or cyclic non-volatile polydimethylsiloxanes (PDMSs); polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, which are pendent or at the end of a silicone chain, these groups having from 2 to 24 carbon atoms; and mixtures thereof.
• PDMSs linear or cyclic non-volatile polydimethylsiloxanes
• polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, which are pendent or at the end of a silicone chain, these groups having from 2 to 24 carbon atoms
• non-volatile fluoro oils mention may be made of optionally partially hydrocarbon-based and/or silicone- based fluoro oils, such as fluorosilicone oils, fluorinated polyethers and fluorosilicones as described in document EP-A-847
• the non-volatile oils will be chosen from non-volatile hydrocarbon-based oils and more particularly hydrogenated polyisobutene oils such as Parleam®, ethers such as dicaprylyl ether or PPG-14 butyl ether, fatty acid esters such as isopropyl palmitate, isononyl isononanoate or C12-C15 alkyl benzoates, fatty alcohols such as octyldodecanol, and mixtures thereof.
• Fatty acid esters such as isopropyl palmitate, isononyl isononanoate or C12-C15 alkyl benzoates, and even more particularly isopropyl palmitate, will be more preferentially chosen.
• the total amount of oil(s) present in the composition of the invention is preferably in a content ranging from 20% to 90% by weight and more preferentially in a content ranging from 30% to 80% by weight relative to the total weight of the liquid phase (or of the fluid).
• the cosmetic compositions according to the invention may also comprise cosmetic adjuvants chosen from deodorant active agents, moisture absorbers, lipophilic suspension agents or gelling agents, softeners, antioxidants, opacifiers, stabilizers, moisturizers, vitamins, bactericides, preserving agents, polymers, fragrances, thickeners or suspension agents, quick-drying agents, or any other ingredient usually used in cosmetics for this type of application.
• cosmetic adjuvants chosen from deodorant active agents, moisture absorbers, lipophilic suspension agents or gelling agents, softeners, antioxidants, opacifiers, stabilizers, moisturizers, vitamins, bactericides, preserving agents, polymers, fragrances, thickeners or suspension agents, quick-drying agents, or any other ingredient usually used in cosmetics for this type of application.
• compositions may contain at least one deodorant active agent in the liquid phase.
• deodorant active agent is intended to mean any substance capable of reducing, masking or absorbing human body odours, in particular underarm odours.
• the deodorant active agents may be bacteriostatic agents or bactericides that act on underarm odour microorganisms, such as 2,4,4'- trichloro-2'-hydroxydiphenyl ether ( ⁇ Triclosan), 2,4-dichloro-2'-hydroxydiphenyl ether, 3',4',5'-trichlorosalicylanilide, 1 -(3',4'-dichlorophenyl)-3-(4'- chlorophenyl)urea ( ⁇ Triclocarban) or 3,7,1 1 -trimethyldodeca-2, 5,10-trienol ( ⁇ Farnesol); quaternary ammonium salts such as cetyltrimethylammonium salts, cetylpyridinium salts, DPTA (1 ,3-diaminopropanetetraacetic acid), 1 ,2- decanediol (Symclariol from the company Symrise); glycerol derivative
• the deodorant active agents may be odour absorbers such as zinc ricinoleates, sodium bicarbonate; metallic or silver or silver-free zeolites, or cyclodextrins and derivatives thereof. They may also be chelating agents such as Dissolvine GL-47-S® from Akzo Nobel, EDTA and DPTA. They may also be a polyol of glycerol or 1 ,3-propanediol type (Zemea Propanediol sold by Dupont Tate and Lyle BioProducts); or else an enzyme inhibitor such as triethyl citrate; or alum.
• odour absorbers such as zinc ricinoleates, sodium bicarbonate; metallic or silver or silver-free zeolites, or cyclodextrins and derivatives thereof. They may also be chelating agents such as Dissolvine GL-47-S® from Akzo Nobel, EDTA and DPTA. They may also be a
• the deodorant active agents may also be agents for neutralizing foul- smelling volatile compounds, such as sodium bicarbonate sold by Universal Preserv-A-Chem, magnesium carbonate sold by Buschle & Lepper, calcium carbonate sold by Sensient, zinc oxide sold by Kobo, magnesium oxide sold by Dr. Paul Lohmann, or calcium oxide; amine derivatives such as tromethamine (TRIS AMINO ULTRA sold by Angus (Dow chemical), triethanolamine, triethylamine and ethanolamine.
• amine derivatives such as tromethamine (TRIS AMINO ULTRA sold by Angus (Dow chemical), triethanolamine, triethylamine and ethanolamine.
• the deodorant active agents may be present in the composition according to the invention in a proportion of approximately 0.01 % to 20% by weight relative to the total composition, and preferably in a proportion of approximately 0.1 % to 5% by weight relative to the total weight of the final composition.
• moisture absorbers for instance perlites and preferably expanded perlites.
• the cosmetic composition may comprise one or more moisture absorbers chosen from perlites.
• the cosmetic composition comprises one or more absorbers chosen from expanded perlites.
• the perlites that may be used according to the invention are generally aluminosilicates of volcanic origin and have the composition:
• the perlite is ground, dried and then sized in a first step.
• the product obtained known as perlite ore, is grey-coloured and has a size of the order of 100 pm.
• the perlite ore is subsequently expanded (1000°C/2 seconds) to give relatively white particles.
• the temperature reaches 850-900°C, the water trapped in the structure of the material evaporates and brings about the expansion of the material, with respect to its original volume.
• the expanded perlite particles in accordance with the invention may be obtained via the expansion process described in patent US 5 002 698.
• the perlite particles used will be ground; in this case, they are known as Expanded Milled Perlite (EMP). They preferably have a particle size defined by a median diameter D50 ranging from 0.5 to 50 m and preferably from 0.5 to 40 pm. Preferably, the perlite particles used have an untamped apparent density at 25°C ranging from 10 to 400 kg/m 3 (standard DIN 53468) and preferably from 10 to 300 kg/m 3 .
• EMP Expanded Milled Perlite
• the expanded perlite particles according to the invention have a water absorption capacity, measured at the wet point, ranging from 200% to 1500% and preferably from 250% to 800%.
• the wet point corresponds to the amount of water which has to be added to 1 g of particle in order to obtain a homogeneous paste.
• This method is directly derived from the oil uptake method applied to solvents. The measurements are carried out in the same way via the wet point and the flow point, which have, respectively, the following definitions:
• Wet point weight, expressed in grams per 100 g of product, corresponding to the production of a homogeneous paste during the addition of a solvent to a powder.
• the wet point and the flow point are measured according to the following protocol: Protocol for measuring the water absorption
• the glass plate is placed on the balance and 1 g of perlite particles is weighed out.
• the beaker containing the solvent and the liquid sampling pipette are placed on the balance.
• the solvent is gradually added to the powder, the whole being regularly blended (every 3 to 4 drops) by means of the spatula.
• the antiperspirant composition according to the invention may also contain one or more agents for the quick drying of the composition after application to the keratin material.
• the quick-drying agents comprise monoalcohols having from 1 to 3 carbon atoms, and more particularly comprise methanol, ethanol, propanol, isopropanol or mixtures thereof.
• the antiperspirant composition according to the invention may also contain one or more suspension agents and/or one or more gelling agents. Some of them may perform both functions simultaneously.
• clays in powder form or in oily gel form, said clays possibly being modified, especially modified montmorillonite clays such as hydrophobic modified bentonites or hectorites, for instance hectorites modified with a Cio to C22 ammonium chloride, for instance hectorite modified with distearyldimethylammonium chloride, for instance the product disteardimonium hectorite (CTFA name) (product of reaction of hectorite and of distearyldimonium chloride) sold under the name Bentone 38 or Bentone Gel by the company Elementis Specialities.
• CFA name product disteardimonium hectorite
• CFA name Stearalkonium Bentonite
• CTFA name product of reaction of bentonite and of quaternary stearalkonium ammonium chloride
• Use may also be made of hydrotalcites, in particular hydrophobic modified hydrotalcites, for instance the products sold under the name Gilugel by the company BK Giulini.
• fumed silica optionally hydrophobically treated at the surface, the size of the particles of which is less than 1 ⁇ . This is because it is possible to chemically modify the surface of the silica, by chemical reaction generating a reduction in the number of silanol groups present at the surface of the silica. It is especially possible to substitute silanol groups with hydrophobic groups: a hydrophobic silica is then obtained.
• the hydrophobic groups may be trimethylsiloxyl groups, which are obtained especially by treating fumed silica in the presence of hexamethyldisilazane. Silicas thus treated are known as "silica silylate" according to the CTFA (8th Edition, 2000).
• silica is sold, for example, under the references Aerosil R812® by the company Degussa, CAB-O-SIL TS-530® by the company Cabot, dimethylsilyloxyl or polydimethylsiloxane groups, which are obtained especially by treating fumed silica in the presence of polydimethylsiloxane or dimethyldichlorosilane.
• Silicas thus treated are known as "silica dimethyl silylate" according to the CTFA (8th Edition, 2000). They are sold, for example, under the references Aerosil R972® and Aerosil R974® by the company Degussa and Cab-O-Sil TS-610® and Cab- O-Sil TS-720® by the company Cabot.
• the hydrophobic fumed silica has in particular a particle size which can be nanometric to micrometric, for example ranging from approximately 5 to 200 nm.
• the suspension agents or gelling agents may be activated with oils such as propylene carbonate or triethyl citrate.
• compositions according to the invention are those conventionally used in compositions for treating perspiration.
• the cosmetic composition comprises one or more propellants.
• the propellant used in the antiperspirant cosmetic composition according to the invention is chosen from dimethyl ether, volatile hydrocarbons such as propane, isopropane, n-butane, isobutane, n-pentane and isopentane, and mixtures thereof, optionally with at least one chlorohydrocarbon and/or fluorohydrocarbon; among the latter, mention may be made of the compounds sold by the company DuPont de Nemours under the names Freon® and Dymel®, and in particular monofluorotrichloromethane, difluorodichloronnethane, tetrafluorodichloroethane and 1 ,1 -difluoroethane, especially sold under the trade name Dymel 152 A® by the company DuPont.
• volatile hydrocarbons such as propane, isopropane, n-butane, isobutane, n-pentane and isopentane, and mixtures thereof, optionally with at least one chlorohydro
• Use may also be made, as propellant, of carbon dioxide gas, nitrous oxide, nitrogen or compressed air.
• the antiperspirant cosmetic composition according to the invention comprises a propellant chosen from volatile hydrocarbons. More preferentially, the propellant is chosen from isopropane, n-butane, isobutane, pentane and isopentane, and mixtures thereof.
• the weight ratio between the liquid phase and the propellant gas varies in a ratio from 5/95 to 50/50, preferably from 10/90 to 40/60 and more preferentially from 15/85 to 30/70.
• composition according to the invention comprises:
• one or more antiperspirant active agents chosen from aluminium salts
• - one or more vinylpyrrolidone-derived polymers chosen from a polyvinylpyrrolidone/hexadecene copolymer, a polyvinylpyrrolidone/eicosene copolymer or mixtures thereof
• one or more propellants chosen from aluminium salts
• vinylpyrrolidone-derived polymers chosen from a polyvinylpyrrolidone/hexadecene copolymer, a polyvinylpyrrolidone/eicosene copolymer or mixtures thereof
• the invention also relates to a cosmetic process for treating human perspiration, and optionally body odours associated with human perspiration, which consists in applying to the surface of the skin an effective amount of the cosmetic composition as described above.
• the application time of the cosmetic composition to the surface of the skin may range from 0.5 to (10) seconds and preferably from 1 to 5 seconds.
• the cosmetic composition in accordance with the invention may be applied several times to the surface of the skin.
• the cosmetic treatment process according to the invention consists in applying to the surface of the armpits an effective amount of the cosmetic composition as described above.
• the invention also relates to the use of said composition for the cosmetic treatment of human perspiration.
• an aerosol device composed of a container comprising an aerosol composition as defined above and of a means for dispensing said composition.
• the dispensing means which forms a part of the aerosol device, generally consists of a dispensing valve controlled by a dispensing head, which itself comprises a nozzle via which the aerosol composition is vaporized.
• the container containing the pressurized composition may be opaque or transparent. It may be made of glass, polymer or metal, optionally coated with a protective varnish coat.
• the transfer may also be evaluated by observing the residual deposit on the plate of synthetic leather: the fabric is then scanned with a scanner sold under the trade name Scanner Epson V500 (16-bit grey setting, resolution 300 dpi).
• the grey level of the scans is then analyzed using ImageJ software which has a grey level ranging from 0 to 255. The higher the grey level value, the stronger the marks. It is thus sought to obtain the lowest possible grey level values.
• the wear property is considered to be very good when the deposit is unchanged after the fabric has been passed over.
• composition of the artificial sweat is considered to be poor when the deposit is no longer (or only slightly) visible after the fabric has been passed over.
• the tackiness may, where appropriate, also be measured to evaluate the tackiness of the compositions according to the invention. This measurement is then carried out according to the protocol described below:
• the texture analyzer is placed in a glovebox so as to work in a temperature- and humidity-controlled atmosphere.
• the probe applies a force of 400 g on the sample.
• the apparatus then calculates the force required for the probe to separate from the sample. In the case of the experiment, only the maximum force which represents the strength of the tackiness of the formula at this given moment is retained. This type of measurement is carried out every 30 seconds for 320 seconds.
• the evaluation of the tackiness is the following:
• the tackiness is considered to be low when the detachment force is less than 60 g.
• the tackiness is considered to be medium when the detachment force is between 60 g and 120 g.
• the tackiness is considered to be high when the detachment force is greater than 120 g.
• Examples 1 -3 Compositions comprising a vinylpyrrolidone/hexadecene copolvmer (Antaron V-216)
• formulations tested in aerosol form comprise a base manufactured according to the process described below and containing the ingredients mentioned in the following table:
• Phase A was mixed with stirring.
• Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes.
• (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained.
• the aluminium chlorohydrate and the aluminium sesquichlorohydrate (D) were then added portionwise. Stirring was continued to obtain good homogenization.
• the fragrance was added.
• the bases thus formulated were packaged in cans and a propellant was added to the above preparations according to the following schemes:
• Example 1 according to the invention containing Antaron V-216 and isododecane, transfers significantly less onto fabric than Example 3 outside the invention which does not comprise Antaron V-216.
• Example 2 outside the invention comprising Antaron V-216 but not comprising isododecane shows that good transfer-resistance efficacy is only obtained in the presence of a volatile oil.
• composition comprising a polymer according to the invention in combination with at least one volatile oil reduces the transfer of the composition comprising the antiperspirant active agents onto the fabric.
• Examples 4-5 Compositions comprising a vinylpyrrolidone/eicosene copolymer (Antaron V-220F)
• formulations tested in aerosol form comprise a base manufactured according to the process described below and containing the ingredients mentioned in the following table:
• Example 4 comprising the PVP/eicosene polymer and isododecane
• Example 5 comprising neither polymer nor isododecane
• Example 4 according to the invention containing Antaron V-220F and isododecane, hardly transfers onto fabric and the deposit has a good resistance to friction.
• Example 5 outside the invention shows that a good transfer-resistance efficacy of the composition is obtained in the presence of polymer combined with a volatile oil.
• formulations tested in aerosol form comprise a base manufactured according to the process described below and containing the ingredients mentioned in the following table:
• E Fragrance 7 7 (1) sold under the trade name Isopropyl Palmitate by the company Cognis (BASF)
• Phase A was mixed with stirring at 45°C.
• Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes.
• (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained.
• the aluminium chlorohydrate and the aluminium sesquichlorohydrate (D) were then added portionwise. Stirring was continued to obtain good homogenization.
• the fragrance was added.
• polyvinylpyrrolidone was shown to be unsuitable for formulation environments such as those of the compositions according to the invention.
• compositions tested in aerosol form comprise a base manufactured according to the process described below and containing the ingredients mentioned in the following table: Phase Ingredients Example 8
• Example 9 Phase Ingredients Example 8
• Phase A was mixed with stirring at 45°C.
• Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes.
• (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained.
• the aluminium chlorohydrate and the perlite (D) were then added portionwise. Stirring was continued to obtain good homogenization.
• the fragrance was added.
• the bases thus formulated were packaged in cans and a propellant was added to the above preparations according to the following schemes:
• compositions of examples 8 and 9 has been evaluated with a texturometer, at 35°C and 75% RH.
• compositions were sprayed for 2 seconds at 15 cm on Supplale support (commercialized by Idemitsu) and adfixed to a specific support formed by a PMMA (polymethylmethacrylate) plate
• the plate and the film are placed under the texture analyzer equiped with a 18mm diameter cylindrical probe, on which a 18 mm Bioskin support disk (Bio skin plate black K275 from Maprecos SAS) has been afixed and covered with a Supplale support.
• the probe applies a force of about 400g on the sample.
• the force required for separating the probe from the sample is then evaluated by the device.
• the maximum force (representing the intensity of composition stickiness) is considered.
• the measure is repeated every 30 seconds, for 10 minutes.

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• 2015
  • 2015-12-28 FR FR1563396A patent/FR3046056B1/fr not_active Expired - Fee Related
• 2016
  • 2016-12-23 EP EP16820284.4A patent/EP3397351A1/de not_active Withdrawn
  • 2016-12-23 BR BR112018012632A patent/BR112018012632A2/pt active Search and Examination
  • 2016-12-23 WO PCT/EP2016/082556 patent/WO2017114786A1/en active Application Filing

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