Classifications

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  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
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  • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
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  • A61K8/31—Hydrocarbons
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  • 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
  • A61K8/8105—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • A61K8/8111—Homopolymers or copolymers of aliphatic olefines, e.g. polyethylene, polyisobutene; Compositions of derivatives of such polymers
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  • 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
  • A61K8/8141—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • A61K8/8147—Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
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  • 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
  • A61K8/8141—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
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  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
  • A61K8/922—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof of vegetable origin
• • A—HUMAN NECESSITIES
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  • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
  • A61K8/965—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution of inanimate origin
• • A—HUMAN NECESSITIES
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  • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
  • A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
• • A—HUMAN NECESSITIES
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  • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
  • A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
  • A61K8/9783—Angiosperms [Magnoliophyta]
  • A61K8/9789—Magnoliopsida [dicotyledons]
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
  • A61Q19/10—Washing or bathing preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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  • 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
  • A61K2800/28—Rubbing or scrubbing compositions; Peeling or abrasive compositions; Containing exfoliants
• • A—HUMAN NECESSITIES
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  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/48—Thickener, Thickening system
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  • A61K2800/52—Stabilizers
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  • A61K2800/591—Mixtures of compounds not provided for by any of the codes A61K2800/592 - A61K2800/596
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  • A61K2800/65—Characterized by the composition of the particulate/core
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  • A61K2800/65—Characterized by the composition of the particulate/core
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  • A61K2800/654—The particulate/core comprising macromolecular material
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  • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
  • A61K2800/805—Corresponding aspects not provided for by any of codes A61K2800/81 - A61K2800/95
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  • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
  • A61K2800/87—Application Devices; Containers; Packaging

Definitions

• the present disclosure relates to formulations for a gritty foam dispenser.
• Lotion soaps are generally dispensed from soap dispenser pumps or pump top bottles. Lotion soaps with mechanical scrubbers are also dispensed through similar devices. Foaming soaps are dispensed from special pumps that mix air and liquid together through a porous media to produce foam.
• Hand cleansers have been around for many years.
• the combination of ingredients in these types of soaps can be specified to achieve a broad range of cleaning characteristics.
• the viscosity of this form of soap is in the range of 5,000 to 30,000 cPoise and is generally tailored to be easily manipulated in the user's hand or pumped through a pump.
• Lotion soaps with suspended mechanical scrubbers tend to have a viscosity range at the low end that is higher than that of basic lotion soaps.
• formulations must also have a critical strain force (or yield value) superior or equal to 30 dynes / cm 2 associated or not to non-Newtonian rheological behaviour, and more particularly plastic or thixotropic properties
• the rheology of this form of soap must be viscoplastic (Casson, or Bingham, or dilatant, or thixotropic, or rheopectic fluids) with a critical strain force which is preferably greater than or equal to 30 dynes/cm 2 .
• the critical strain force is defined as that stress which must be applied before flow will start and, although related to viscosity, it is more dependent on the characteristics of the rheological additive used.
• the critical strain force has traditionally been determined by measuring the viscosity of the material at two speeds using a Brookfie!d Viscometer. As the speed of rotation of the spindle is increased materials that undergo shear thinning give a lower viscosity measurement
• the soap's critical strain force or the required yieid value may be calculated as follows;
• Foaming hand cleansers offer many benefits over lotion hand cleansers. Foam products are quicker and easier to use since they are delivered into the user's hand in a lathered format. Foam hand cleansers spread more effectively than lotion hand cleansers, providing better cleaning performance with less product. Since foaming hand cleansers are already lathered, there is less water needed in the cleaning process and the user can clean their hands in less time.
• the viscosity range of this form of hand cleanser is less than 100 cPoise and is tailored to be easily mixed with air through a porous media to produce foam from a pump.
• foam soaps are such that they are not capable of suspending mechanical scrubbers of sufficient size to provide cleaning benefits.
• Current foam pump technologies mix air and liquid together and pass them through a porous media to make the foam.
• the porous media is generally very fine and would sieve out mechanical scrubbers.
• a hand cleanser could be formulated that can suspend particulate mechanical scrubbers with particles sized from about 100 microns to about 800 microns that decreases in viscosity when exposed to high shear rates and is capable of being foamed through a non- aerosol, or unpressurized pump dispenser.
• Prior art does not capture the requirement of the formulation to generate foam when mixed and dispensed with air from a non-aerosol dispenser.
• the assumption from the prior art is since it is soap, it will naturally foam. While this may be true if mechanical manipulation is done (rubbing in the hand), if the formulation does not have the desired characteristics, it will not create an acceptable foam through a non aerosol pump.
• An embodiment of a foamable gritty composition comprises constituents including a solvent present in a range from about 0.5% w/w to about 30.0% w/w, in which the solvent includes any one or combination of D'limonene and sunflower oil methyl ester.
• the formulations include a particulate scrubbing agent present in a range from about 1 ,0% w/w to about 8% w/w.
• a surfactant present in a range from about 0.5% w/w to about 30.0% w/w
• skin conditioner present in a range from 0.01% w/w to about 5.00% w/w
• a non- Newtonian thickening agent present in a range from about 0.05% w/w to about 10% w/w, and wafer.
• the non-Newtonian thickening agent is selected to give the foamable gritty formulation a critical strain force greater than or equal to about 30 dynes/cm 2 , and a viscosity in a range from about 500 cPoise to about 4000 cPoise such that the foamable gritty composition is dispensible as a foam from a non-aerosol foam dispenser.
• the present disclosure also provides a method of producing and dispensing a gritty foam, the method comprising;
• a foamable gritty composition from an unpressurized container having a dispenser pump configured to mix air with the foamable gritty composition under low pressure conditions during dispensing to form a gritty foam, the foamable gritty composition comprising
• a particulate scrubbing agent present in a range from about 1 ,0% w/w to about 8% w/w;
• a surfactant present in a range from about 0,5% w/w to about 30.0% w/w;
• skin conditioner present in a range from 0.01% w/w to about 5.00% w/w;
• a non-Newtonian thickening agent present in a range from about 0.05% w/w to about 10% w/w;
• the non-Newtonian thickening agent is selected to give the foamable gritty composition a critical strain force greater than or equal to about 30 dynes/cm 2 , and a viscosity in a range from about 500 cPoise to about 4000 cPoise such that said foamable gritty composition is dispensible as a foam from a an unpressurized foam dispenser.
• Table 1 shows a broad class of constituents that can be used to produce formulations for a gritty foam dispenser in accordance with the present invention
• Table 2 shows an exemplary formulation.
• the terms, “comprises” and “comprising” are to be construed as being inclusive and open ended, and not exclusive. Specifically, when used in this specification including claims, the terms, “comprises” and “comprising” and variations thereof mean the specified features, steps or components are included. These terms are not to be interpreted to exclude the presence of other features, steps or components.
• exemplary or “example” means “serving as an example, instance, or illustration,” and should not be construed as preferred or advantageous over other configurations disclosed herein.
• Newtonian thickening agent means a category of fluids whose viscosity (resistance to deformation or shear forces) is influenced by the shear stress and/or by the time this force is applied.
• critical strain force also referred to as “yield value” refers to a term used in rheology in which the 'critical strain force' is the minimum force that must be appiied to a material to induce viscous flow.
• the critical strain force is a measurable quantity (expressed in dynes/cm 2 ).
• both phrases are referring to the same phenomenon which is that up to a certain force exerted (the critical strain force), a visco-elastic material will exhibit "solid like” or “elastic” properties, i.e. it will not have a net flow. Above the critical strain force (or above the “yield value”) the same material will exhibit viscous properties, i.e. it will flow.
• the beads will stay forever in suspension. If they exert a force higher than the critical strain (or yield value), then they will migrate over time, either floating to the top of the fluid or settling to the bottom.
• non-aerosol dispenser or “unpressurized dispenser” means a dispenser that does not have a stored propellant as the source of gas to create the foam structure within the hand cleanser.
• “Foam” as used herein means a liquid and a gas mixed to form a mass of small bubbles that has a structure that lasts for a variable length of time.
• low pressure in the context of producing a foam as used herein means a pressure of around an atmosphere or less such as when dispensing the foam from an unpressurized container. Typically when foams are dispensed from aerosol containers the foam is considered to be being dispensed under high "pressure" conditions.
• the present disclosure provides a skin cleanser, which is a foamable gritty composition that can suspend mechanical scrubber particles having a size in the range from about 100 to about 800 microns that decreases in viscosity when exposed to high shear rates and is capable of being foamed through a non-aerosol (unpressurized) pump.
• particulate scrubbing agents are present.
• the fluid must be capable of becoming aerated and second it must be capable of stabilising the entrained air bubbles divided by fluid films.
• the presence of surfactants in a suitable concentration broadly satisfies the second of these requirements by providing a means of stabilising fluid films by setting up a surface tension gradient that acts to oppose draining forces and hence maintains the thickness of the films, avoiding collapse.
• the solvent can include aqueous (water) and non-aqueous components.
• the non-aqueous solvent is one or both of D-limonene and sunflower oil methyl ester.
• Other optional solvents that can be added include any one or combination of glycol ethers, esters, alcohols, terpenes other than D'Limonene, aromatic-free white spirit.
• a total amount of non-aqueous solvent present in the composition is in the range from about 0.5% w/w to about 30.0% w/w.
• the water is present in an amount to balance the total
• composition to 100% w/w weight.
• the particulate scrubbing agent is any one or combination of a vegetable based scrubbing agent, a synthetic based scrubbing agent and a mineral based scrubbing agent, and the particles have a size in a range from about 100 microns to about 800 microns, or in a range from about, or in a range from about 200 to about 700, or in a range from about 300 to about 500 microns.
• the particles may have any size in this range, or be in any narrow range than 100 to 800 microns, or there may be a mixture of any size of particles in this broad range present in the composition.
• the vegetable based scrubbing agent may be any one or combination of cornmeal, olive stone, walnut shells, ground fruit stones, ground corn meal, ground fruit shells.
• the synthetic based scrubbing agent may be any one or combination of polyethylene and polypropylene.
• the mineral based scrubbing agent may be any one or combination of ground shellfish, pumice, and silica.
• the particulate scrubbing agent present is present a range from about 1.0% w/w to about 8% w/w.
• the surfactant may include any one or combination of i) an anionic surfactant present in a range from about 1 % w/w to about 20% w/w if present alone; ii) an amphoteric surfactant present in a range from about 0.5% w/w to about 5.0% w/w if present alone; iii) a non-ionic surfactant present in a range from about 0.5% w/w to about 20% w/w if present alone. If the surfactant is any combination of two or more of i), ii) or iii), the total amount of surfactant is also in the range from about 0.5% w/w to about 30.0% w/w.
• the amphoteric surfactant may be any one or combination of betaines, acyl ethylene diamines, amino-acids derivates, imidazolines.
• the amphoteric surfactant may be any one or combination of acylamphoacetate, acylamphodiacetate, acylamphodipropionate, sodium cocoglycinate, sodium alkyliminodipropionate, cocamidopropyl betaine, sodium cocoamphoacetate.
• the betaine may be any one or combination of coco betaine and cocamidopropyl betaine.
• the non-ionic surfactant may be any one or combination of of glucosides, ethoxylated fatty alcohols, ethoxylated fatty acids, saccharose esters, sorbitan esters, alkanolamides, glycerol alkyl esters, polyoxyethylene glycol alkylphenol ethers,
• the anionic surfactant may be any one or combination of lauryl sulphates, Saury! ether sulphates, sulphosuccinates, carboxylates (i.e. sodium o!eate), carboxylic acid esters (i.e. sodium dilaureth citrate), alkyt sulfate (i.e. sodium lauryl ether sulfate, ammonium alkyl sulfate, alkyl and alkyl-aryl sulfonates (i.e. sodium dodecyl benzene sulfonate), sulfosuccinates (i.e.
• disodium lauryl ether sulfosuccinate isethionates (i.e. sodium cocoyi isethionate, ammonium cocoyi isethionate), tau rates (i.e. sodium methyl cocoyi taurate, sodium methyl oleoyl taurate), acyf glutamates (i.e. sodium iauroyl glutamate, sodium cocoyi glutamate, disodium cocoyi glutamate), sarcosinate (i.e. cocoyi sarcosinate), alkylpoiyglucosides (i.e. decyl glucoside, sodium lauryl glucose carboxylate, caprylyl/capryl glucoside).
• isethionates i.e. sodium cocoyi isethionate, ammonium cocoyi isethionate
• tau rates i.e. sodium methyl cocoyi taurate, sodium methyl oleoyl taurate
• acyf glutamates
• the skin conditioner is any one or combination of a polyol, an anionic surfactant (examples: methyl gluceth-20, sodium laureth carboxylate, xylitylglucoside, sodium cocoyi glutamate, sodium cocoyi glycinate) a non- ionic surfactant (examples: PEG castor oil, PEG dimethicone, Glycereth cocoate), a cationic surfactant (examples: cocamidopropyl betainamide mea chloride, cocamidopropyl pg-dimonium chloride phosphate), an amphoteric surfactant (examples: lauramine oxide, undecylenamidopropyl betaine, sodium cocoamphoacetate) , a cationic polymer, a quaternised gum, and a polyol.
• an anionic surfactant examples: methyl gluceth-20, sodium laureth carboxylate, xyl
• the polyol may be any one or combination of glycerine and
• polyglycerin-6 propylene glycol, sorbitol, mannitol, erythritol, xylitol, arabitol, ribitol, dulcitol, lactitol, and maltitol.
• the skin conditioner is present in a range from 0.01 % w/w to about
• the non-Newtonian thickening agent is selected to give the foamable gritty composition a critical strain force greater than or equal to about 30 dynes / cm 2 , and a viscosity in a range from about 500 cPoise to about 4000 cPoise, and preferably about 1000 cPoise to about 3000 cPoise, and most preferably about 2000 cPoise to about 2500 cPoise such that the foamable gritty composition is dispensible as a foam from a non-aerosol foam
• the non-Newtonian thickening agent may be any one or combination of synthetic polymers and natural thickeners.
• the synthetic polymer may be selected from the group consisting of acrylate copolymers.
• the synthetic polymer may be any one or combination of acrylates/C10-30 a Iky I acrylate crosspolymer and carbomers.
• the natural thickener may be any one or combination of xanthan gum, guar gum, quaternised guar gum, alginate, bentonite and fumed silica.
• the non-Newtonian thickening agent is present in a range from about 0.05% w/w to about 10% w/w.
• Antioxidants may be included in the formulations which are included to limit the risk of oxidation of d-limonene (becomes a sensitizer when oxidised).
• the antioxidants may include, but are not limited to: butylhydroxytoluene (BHT), butylhydroxyanizole, 1 ,2-dihydroxybenzene, p-coumarine acid, caffeic acid, sodium sulfite, sodium metasulfite, ferrulic acid, tyrosol, quercetin, chlorogenic acid, oleuropein hydroxytyrosol, ascorbic acid, phenolic acid, propyl gallate, cx-tocopherol, ⁇ -tocopherol, ⁇ -tocopherol, ⁇ -tocopherol, tetradibutyl-pentaerithrityl hydroxyhydrocinnamate.
• the antioxidants may be present in an amount ranging from about 0.01 to 1.0% w/w.
• a useful non-aerosol, unpressurized pump that may be used is disclosed in United States Patent Nos. 8,002,151 and 8,281 ,958, which are incorporated herein by reference in their entirety.
• the unpressurized container used for dispensing the present foamable gritty composition will generate pressure when the gritty composition and air are introduced into a mixing chamber by mechanical actuation of a dispensing feature(s), and this mechanical actuation can be initiated by a user actuating the dispensing feature(s) or by sensor activated dispensing feature(s) when the presence of a user is detected.
• the present disclosure provides a method of making and dispensing a gritty foam.
• the method involves introducing a predetermined quantity of air under pressure to a first side of a microporous air sparging element located upstream from an outlet while introducing, concurrently with the introduction of the air, a predetermined amount of the foamable gritty composition under pressure to a foamable gritty composition inlet of a mixing chamber located on a second side of the microporous air sparging element and located upstream from the outlet, such that a ratio of air to foamable gritty composition has a greater proportion of air to foamable gritty composition.
• the method involves forcing the air through the microporous sparging element into the mixing chamber to form a plurality of bubbles and mixing the plurality of bubbles and the foamable gritty composition in the mixing chamber thereby creating a gritty foam and dispensing the gritty foam to a user in shots through the outlet from the mixing chamber.
• the air may be introduced in a predetermined quantity and the foamable gritty composition may be introduced in a predetermined quantity

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• 2013
  • 2013-03-14 US US13/804,209 patent/US20140039066A1/en not_active Abandoned
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  • 2013-07-25 JP JP2015524735A patent/JP6401159B2/ja active Active
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  • 2013-07-25 KR KR20157005392A patent/KR20150043357A/ko not_active Withdrawn
  • 2013-07-25 WO PCT/EP2013/065766 patent/WO2014019944A2/en not_active Ceased
  • 2013-07-25 CN CN201910665231.7A patent/CN110314103A/zh active Pending
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• 2015
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  • 2015-11-20 US US14/947,956 patent/US20160113849A1/en not_active Abandoned
• 2017
  • 2017-10-16 US US15/784,487 patent/US20180036211A1/en not_active Abandoned

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