WO2024059429A1 - Élément lubrifiant comprenant de l'acide polyglutamique - Google Patents
Élément lubrifiant comprenant de l'acide polyglutamique Download PDFInfo
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- WO2024059429A1 WO2024059429A1 PCT/US2023/073044 US2023073044W WO2024059429A1 WO 2024059429 A1 WO2024059429 A1 WO 2024059429A1 US 2023073044 W US2023073044 W US 2023073044W WO 2024059429 A1 WO2024059429 A1 WO 2024059429A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lubricating
- pga
- lubricating member
- oil
- hair removal
- Prior art date
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- GVPDNFYOFKBFEN-UHFFFAOYSA-N trimethyl(octadecoxy)silane Chemical compound CCCCCCCCCCCCCCCCCCO[Si](C)(C)C GVPDNFYOFKBFEN-UHFFFAOYSA-N 0.000 description 1
- PHYFQTYBJUILEZ-IUPFWZBJSA-N triolein Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CCCCCCCC)COC(=O)CCCCCCC\C=C/CCCCCCCC PHYFQTYBJUILEZ-IUPFWZBJSA-N 0.000 description 1
- PVNIQBQSYATKKL-UHFFFAOYSA-N tripalmitin Chemical compound CCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCC PVNIQBQSYATKKL-UHFFFAOYSA-N 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 150000003712 vitamin E derivatives Chemical class 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 230000029663 wound healing Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- DTOSIQBPPRVQHS-UHFFFAOYSA-N α-Linolenic acid Chemical compound CCC=CCC=CCC=CCCCCCCCC(O)=O DTOSIQBPPRVQHS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q9/00—Preparations for removing hair or for aiding hair removal
- A61Q9/02—Shaving preparations
-
- 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
- A61K8/8141—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
- A61K8/8158—Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers
-
- 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
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/86—Polyethers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
- B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
- B26B19/40—Lubricating
-
- 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
- A61K2800/80—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 is directed to lubricating members and lubricating compositions, and specifically a lubricating member and a lubricating composition comprising polyglutamic acid material and a hair removal device comprising the lubricating member.
- Shaving aids can take a variety of forms.
- One common form is a lubricating member or lubristrip, which is typically integrated into the hair removal head such as the cartridge of a razor to provide lubrication during shaving.
- Another common form is a “wing” or “soap wing,” which is disposed outward of the cartridge and generally attached to it.
- Other common forms include lubricating compositions that may be used separately from the hair removal device or dispensed from a container within the hair removal device.
- Shaving aids comprise a lubricant and may optionally comprise a matrix material in which the lubricant is dispersed.
- the lubricant is commonly composed, at least partly, of polyethylene oxide (PEO).
- PEO polyethylene oxide
- PEO is a high molecular weight, water-soluble polymer, and when activated by water during shaving, the PEO deposits onto the skin, adding a layer of lubrication.
- PEO in water is a viscoelastic fluid, and the rheological properties are directly correlated to the coefficient of friction (CoF) of the fluid.
- a lubricating member for a hair removal device in which the lubricating member comprises a lubricating material, the lubricating material comprising a polyglutamic acid (PGA) material.
- PGA polyglutamic acid
- a lubricating composition in which the lubricating composition comprises a matrix material and a lubricating material .
- the lubricating material comprises a polyglutamic acid (PGA) material, in which the PGA material comprises at least 5% of the lubricating composition by weight.
- PGA polyglutamic acid
- a method of forming a lubricating member for use on a hair removal device comprising: providing a matrix material; providing a lubricating material, in which the lubricating material is a polyglutamic acid material; blending the matrix material with the lubricating material to form a mixture; and forming a lubricating member from the mixture.
- FIGS. 1A-1H are perspective views of a razor cartridge comprising various lubricating members in accordance with the present disclosure.
- FIGS. 2A and 2B are graphs showing the viscous and elastic moduli of various lubricating member formulations.
- FIG. 3 is a bar graph showing an average performance score of various lubricating member formulations during a use test.
- FIG. 4 is a flowchart illustrating an exemplary process for forming a lubricating member for use on a hair removal device, in accordance with the present disclosure.
- FIG. 5 is a graph depicting the viscosity gain for a series of mixtures of PGA and PEG.
- the present disclosure relates to a lubricating member and a hair removal device comprising the lubricating member, in which the lubricating member includes a lubricating material that includes a polyglutamic acid (PGA) material and, optionally, a matrix material.
- the present disclosure also relates to methods of forming a lubricating member for use on a hair removal device.
- the present disclosure further relates to a lubricating composition comprising a matrix material and a lubricating material comprising PGA material.
- PEO polyethylene oxide
- PGA material is currently used in a wide variety of industries such as water treatment, drug delivery, and skin care formulations. With respect to skin care formulations, PGA material is typically used to retain moisture (i.e., as a humectant), to reduce wrinkles and other effects of aging, and to promote wound healing. PGA material is generally not used for its lubricating properties. It was surprisingly found that use of PGA material in lubricating members and lubricating compositions in sufficiently high levels, e.g., at least 5% by weight of the lubricating member or composition, is capable of delivering adequate lubrication during shaving.
- PGA material is a natural product that can be produced using fermentation and can be used to replace, or reduce the amount of, the synthetic materials currently found in lubricating members and compositions.
- PGA material could be used as an effective replacement for PEO, which has a lower melting temperature than PGA material, while still maintaining the desirable properties of PEO.
- the lubricating member finds particular application for hair removal devices.
- Hair removal devices generally comprise a hair removal head and a handle or grip portion upon which the hair removal head is mounted, either permanently or detachably/attachably.
- the hair removal device can be manual, or power driven and can be used for wet and/or dry application.
- the hair removal head may include a wide scraping surface, such as where the hair removal device is used with a depilatory, or a blade where the device is a shaving razor.
- the hair removal head may be a razor cartridge 10, as shown in FIG. 1A.
- the hair removal head may be pivotally connected to a connecting structure that in turn, or independently (e.g., permanently fixed), is connected to the handle.
- the connecting structure includes at least one arm to releasably engage the hair removal head.
- the hair removal head may be integral with the handle so that the hair removal device is discarded as a whole unit or may comprise a detachable hair removal head that forms part of a shaving system, in which the detachable hair removal head is uncoupled from the handle and disposed of and a new detachable hair removal head is coupled to the same handle.
- the hair removal head typically comprises one or more blades usually positioned between a first and second end, the one or more blades comprising a tip (also commonly called a blade “edge”) extending forwardly.
- the razor cartridge 10 may comprise a housing 12.
- One or more razor blades 20 may be incorporated into the housing 12, in which each blade 20 includes a blade edge comprising a blade tip 22.
- U.S. Patent No. 7,168, 173 generally describes a FUSION® razor that is commercially available from The Gillette Company, and which includes a razor cartridge with multiple blades.
- suitable razor cartridges, with and without fins, guards, and/or shave aids include those marketed by The Gillette Company under the FUSION®, VENUS® product lines (Gillette) as well as those disclosed in U.S. Patent Nos. 7, 197,825, 6,449,849, 6,442,839, 6,301,785, 6,298,558, 6,161,288, and U.S. Patent Application Publication No. 2008/0060201.
- the lubricating member can be used with any currently marketed razor or shaving system, including those having two, three, four, or more blades.
- the hair removal device is a razor
- the hair removal head is a razor cartridge.
- Another example of a hair removal device is a scraping tool for use with a hair removal composition, i.e., a depilatory.
- the hair removal device may be a liquid dispensing razor (LDR), which is described in U.S. Patent No. 9,216,514.
- At least one lubricating member 18 is located on a portion of the housing 12, i.e., a lubricating surface, that contacts the skin during the hair removal process.
- the blade tips of the one or more razor blades 20 are exposed on the lubricating surface of the housing 12.
- the one or more lubricating members 18 may be located forward and/or aft of the blades 20.
- a feature “forward” of the one or more blades 20, for example, is positioned so that the surface to be treated by the hair removal device (e.g., the user’s skin) encounters the feature before it encounters the blades 20.
- a feature “aft” of the one or more blades 20 is positioned so that the surface to be treated by the hair removal device encounters the feature after it encounters the blades 20.
- a lubricating member 18 is positioned on a cap 16 of the razor cartridge 10.
- a plurality of lubricating members may be provided on the hair removal head, in which the plurality of lubricating members may be the same or different in terms of physical shape/structure and/or chemical composition. These lubricating members may be placed collectively (for example adjacent to one another) forward or aft of the blades, including side by side, or separately with one ahead of the blades and the other behind.
- lubricating members may be positioned outward of the razor cartridge (or hair removal head) as “wings”. As shown in FIGS. IB- ID, one or both of the lubricating members 18 A, 18B can bend forward and back if the rest of the razor cartridge 10 is in a locked position such as locked into an at rest position.
- the lubricating member may be separate from or attached to the hair removal device or head.
- the lubricating member may be attached to the hair removal device or head by any suitable attachment means such as adhesive or interference fit or may be contained at least partially within a container, such as a tray.
- Exemplary embodiments of lubricating members contained in containers include U.S. Patent Application Publication Nos. 2011/0041865 and 2012/0023763.
- the lubricating member 18 may be formed in a container 40 by any means.
- the lubricating member 18 may be compressed directly in the container 40, such as a tray as shown in FIG. 1G, or into a box as shown in FIG. 1H.
- the cartridge 10 comprises a guard 14 comprising at least one elongated flexible protrusion (not separately labeled) to engage a user’s skin.
- the at least one flexible protrusion may comprise flexible fins generally parallel to the one or more blades 20.
- the at least one flexible protrusion may additionally or alternatively comprise flexible fins comprising at least one portion that is not generally parallel to the one or more blades.
- suitable guards include those used in current razor blades and include those disclosed in U.S. Patent Nos. 7,607,230 and 7,024,776; (disclosing elastomeric/flexible fin bars); and U.S. Patent Application Publication Nos.
- the lubricating member is positioned on the cartridge aft of the guard and forward of the blades. In another example, the lubricating member is positioned on the cartridge forward of the guard. This example can be particularly useful to deliver the lubricating member prior to contact with the guard.
- the lubricating member and/or lubricating composition may comprise a lubricating material comprising a polyglutamic acid (PGA) material, which provides lubrication during the shave
- the lubricating material may further include an additional PGA material, polyethylene oxide (PEO), carbohydrates, polyvinyl pyrrolidone, polyacrylamide, polyhydroxymethacrylate, polyvinyl imidazoline, polyethylene glycol (PEG), polyvinyl alcohol, polyhydroxyethylmethacrylate, copolymers of PEO and polypropylene oxide (PPO), guars, celluloses, modified celluloses, and mixtures thereof.
- the lubricating material is the PGA material.
- the lubricating material may comprise the PGA material and one or more second lubricating materials comprising one or more of PEO and a carbohydrate.
- the lubricating member and/or lubricating composition may comprise a lubricating material comprising at least 5%, and preferably at least 10%, by weight of the lubricating member or composition.
- the lubricating material may comprise from 5% to 90% by weight of the lubricating member or composition.
- the lubricating material may comprise 5% to 80%, and preferably 30% to 70%, by weight of the lubricating member or composition.
- the lubricating material may comprise 30% to 70% by weight of the lubricating member or composition, particularly when the lubricating material comprises PGA material alone.
- the lubricating material may comprise 100% PGA material by weight of the lubricating member or composition.
- an amount of PGA material greater than or equal to 5%, and preferably greater than or equal to 10%, by weight of the lubricating member or composition is needed to achieve viscoelastic and other properties comparable to a conventional lubricating member or composition, such as a conventional lubricating member or composition comprising PEO as the primary lubricating material.
- the lubricating material may include a water-soluble polymer, especially PGA material, that may have a weight-average molecular weight of at least 100,000 Daltons, preferably 1 million Daltons, and more preferably 2 million Daltons or greater. Without intending to be bound by theory, it is believed that a lubricating material with a higher molecular weight leads to better performance by the lubricating member or composition. As discussed below, lubricating members comprising PGA material with a molecular weight of 2 million Daltons performed similarly to lubricating members comprising PEO.
- the water-soluble polymer exhibits the necessary flexibility that is believed to limit viscoelastic properties and lubricity.
- the water- soluble polymer comprises a PGA material, which may include PGA, PGA salts, and PGA derivatives.
- Preferred PGA materials may have the general formula of: where n may have a value of greater than 700.
- PGA material is a naturally derived polymer that may be produced via renewable methods such as fermentation.
- the PGA material may be derived from bacterial fermentation of soybeans using known methods
- PGA materials useful in the present invention may include PGA derivatives (i.e., materials in which a C-H bond is replaced with a C-R bond, where R represents a non-hydrogen moiety) crosslinked PGA materials and various PGA salts, such as, but not limited to y-PGA (H form), Na-PGA, K-PGA, Ca-PGA, Mg-PGA, NH 4 -PGA, and mixtures thereof.
- FIG. 5 depicts the viscosity gain for a series of mixtures of PGA and PEO.
- the figure depicts the viscosity gain for mixtures of PGA with a high- MW PEO as compared with the viscosity gain for a Low-MW PEO with the same high-MW PEO.
- the PGA/PEO mixture was assessed as a 0.5% (w/w) solution in water and as a 1.0% (w/w) solution in water.
- the PGA/PEO ratio was varied from 100:0 to 0:100 with interim ratios forming the curve and depicts an increased synergy in the PGA/PEO mixtures than in the PEO/PEO mixture.
- the lubricating member and/or lubricating composition may comprise a matrix material that provides structural integrity to the lubricating member or composition and may enhance the life of the lubricating material by reducing its tendency to be mechanically eroded.
- the matrix material may be solid at standard temperature and pressure.
- the lubricating member or composition may comprise from 1% to 77%, preferably from 10% to 40%, and more preferably from 20% to 40% by weight of the matrix material.
- the matrix material may comprise a polymer or a molecular structurant.
- the polymer may comprise a matrix polymer such as ethylene vinyl acetate (EVA).
- EVA ethylene vinyl acetate
- examples of lubricating members comprising EVA may be found in, for example, U.S. Patent Nos. 5,349,750 and 10,682,778.
- the polymer may comprise a polymeric matrix material such as high impact polystyrene (HIPS). Examples of lubricating members comprising HIPS may be found in, for example, U.S. Patent No. 8,236,214 and U.S. Patent Application Publication No. 2013/0042482.
- a matrix polymer may include ethyl cellulose; polycaprolactone (PCL); polyethylene, polypropylene; polystyrene; butadiene-styrene copolymer (e.g., medium impact polystyrene and HIPS); polyacetal; acrylonitrile butadiene-styrene (ABS) copolymer; polyurethane; and blends such as polypropylene/polystyrene blend, and mixtures thereof.
- PCL polycaprolactone
- PCL polyethylene, polypropylene
- polystyrene polystyrene
- butadiene-styrene copolymer e.g., medium impact polystyrene and HIPS
- ABS acrylonitrile butadiene-styrene
- polyurethane polyurethane
- lubricating members comprising PCL may be found in, for example, U.S. Patent No. 6,301,785.
- Lubricating members comprising HIPS are typically formed by extruding a mixture that is heated to approximately 200°C and exposed to shear during extrusion. These high processing temperatures and high shear conditions may limit the stability of the lubricating material and/or the viability of compatible stabilizing agents. As such, the use of a lower temperature processable polymer matrix material such as EVA, which requires a lower processing temperature of approximately 130°C, or a melt-formed composition may be preferable. Lubricating compositions and melt-formed lubricating members may include a non- polymeric structurant as part of the matrix material, in which the non-polymeric structurant has a melt temperature of less than 100°C.
- the non-polymeric structurant may comprise one or more lipophilic structurants.
- Suitable lipophilic structurants for use herein include C12 or greater, preferably C12 to C22, more preferably C20 to C22, chain length fatty acyls such as fatty acids, salts of fatty acids (i.e. “soaps”), fatty alcohols and esters, triglycerides, waxes, and mixtures thereof.
- Particularly preferred are C12-C22 alcohols, acids, and soaps, in particular cetyl, stearyl, and behenyl alcohols and mixtures thereof.
- the structurant comprises behenyl alcohol.
- Suitable lipophilic structurants also include natural, synthetic, and silicone waxes.
- the term “wax” includes, but is not limited to, any material that is solid at 45°C, preferably at 25 °C; and are very slightly soluble in water, preferably practically insoluble in water according to the United States’ Pharmacopeia (USP) definition in 31/NF 26 Vol. 2 General Notices, Page Xvii. According to that definition, this means that 1000 to 10000 parts of water are needed to dissolve 1 part solute and that more than 10,000 parts of water are needed to dissolve 1 part solute respectively.
- USP Pharmacopeia
- the wax may comprise natural wax, synthetic wax or mixtures thereof.
- Natural waxes may be plant, animal or mineral derived.
- suitable natural waxes include Beeswax, Copemicia Cerifera (Carnauba) Wax, Euphorbia Cerifera (Candelilla) Wax, Jojoba Wax, Oryza Sativa (Rice) Bran Wax, Lemon peel wax, Soybean wax, Sunflower wax and mixtures thereof.
- Non-limiting examples of suitable synthetic waxes include Hydrogenated Jojoba Wax, synthetic and siliconyl jojoba wax, Hydrogenated Microcrystalline Wax, Microcrystalline Wax, synthetic, siliconyl and Hydrogenated Rice Bran Wax, Ceresin, Ozokerite, Paraffin, behenyl beeswax, synthetic, siliconyl and hydrogenated Beeswax, synthetic, hydrogenated and siliconyl Candelilla Wax, synthetic, hydrogenated and siliconyl Carnauba, wax, synthetic, hydrogenated and siliconyl lemon peel wax, synthetic, siliconyl and hydrogenated soybean wax, synthetic, siliconyl and hydrogenated sunflower wax and mixtures thereof.
- Preferred natural and synthetic waxes are Beeswax, Microcrystalline wax, Candellila wax, Ozokerite, and mixtures thereof.
- Non-limiting examples of suitable silicone waxes include Stearoxy trimethyl silane such as DC580 wax, C30-C45 alkyl methicone available as DC AMS-C30 Cosmetic Wax, stearoxymethyl silane available as DC Silkywax 10, C24-C54 alkyl methicone such as DC ST-Wax 30, C30-C45 Alkyldimethylsilyl, Polypropyl-silsesquioxane, available as DC SW-8005 resin wax, and mixtures thereof.
- Stearoxy trimethyl silane such as DC580 wax, C30-C45 alkyl methicone available as DC AMS-C30 Cosmetic Wax, stearoxymethyl silane available as DC Silkywax 10, C24-C54 alkyl methicone such as DC ST-Wax 30, C30-C45 Alkyldimethylsilyl, Polypropyl-silsesquioxane, available as DC SW-8005 resin wax, and mixtures thereof.
- the lipophilic stmcturant and/or lubricating member or composition may comprise from 10% to 60% lathering surfactant.
- lathering surfactants may be found in, for example, U.S. Patent No. 9,119,796.
- a lathering surfactant is defined as a surfactant which when combined with water and mechanically agitated generate a foam or later.
- Lathering surfactants include anionic and amphoteric lathering surfactants and mixtures thereof.
- Anionic lathering surfactants include sarcosinates, sulfates, sulfonate, isethionate, taurates, phosphates, lactylates, glutamates, alkali metal salts of fatty acids (i.e., soaps) having from 8 to 24 carbons, and mixtures thereof.
- the lubricating member may further comprise from 1% to 70%, preferably from 5% to 60%, and more preferably from 10% to 40% by weight of the lubricating member of a liquid phase.
- the liquid phase comprises a hydrophobic material or mixtures thereof.
- the liquid phase may provide a number of in use benefits such as lubrication, skin feel, skin health, and cooling sensation.
- the liquid phase is generally contained within the solid lubricating member by the matrix material.
- the liquid phase may have a melting point of 45°C or less, preferably 40°C or less, even more preferably 30°C or less, most preferably 25°C or less.
- the melting point is determined according to ASTM D5440-93.
- the liquid phase and the hydrophobic material is liquid at 25°C.
- the use of a liquid phase enables the materials such as the lipophilic structurant to be readily added and mixed upon melting thereof.
- the liquid phase hydrophobic material or mixtures thereof may be very slightly soluble and have a melting point of 45°C or less, as defined herein above, and be miscible with one another.
- the melting point of the mixture of liquid phase and the lipophilic structurant is preferably from 45°C to 5° C less than the melting point of the lubricating material and/or the water-soluble polymer.
- Suitable liquid phase components for use herein include for example natural oils, synthetic oils, silicone oils, petrolatum, triglycerides, butters, or mixtures thereof.
- oil includes, but is not limited to any non-aqueous substance that is very slightly soluble, preferably practically insoluble in water according to the ’USP definition.
- Petrolatum may be considered as a lipophilic structurant or a liquid phase due to it being a complex mixture of component materials.
- the oil may be selected from natural oil, synthetic oil, silicone oil and mixtures thereof.
- suitable natural oils include Acetylated Castor Oil, Acetylated Hydrogenated Castor Oil, Actinidia Chinensis (Kiwi), Seed Oil, Adansonia Digitata Oil, Aleurites Moluccana Seed Oil, Anacardium Occidental (Cashew) Seed Oil, Arachis Hypogaea (Peanut) Oil, Arctium Lappa Seed Oil, Argania Spinosa Kernel Oil, Argemone Mexicana Oil, Avena Sativa (Oat) Kernel Oil, Bertholletia Excelsa Seed Oil, Borago Officinalis Seed Oil, Brassica Campestris (Rapeseed) Seed Oil, Calophylhim Tacamahaca Seed Oil, Camellia Japonica Seed Oil, Camellia Kissi Seed Oil, Camellia Oleifera Seed Oil, Canola Oil, Caprylic/Capric/Lauric Triglyceride,
- Suitable synthetic oils include hydrocarbons, esters, alkanes, alkenes, and mixtures thereof.
- Non-limiting examples include isopropyl palmitate, isopropyl stearate, isohexadecane, isododecane, polygly ceryl triisostearate and mixtures thereof.
- Non-limiting examples of suitable silicone oils include dimethicones (including partial esters of dimethicones and fatty acids derived from natural/synthetic oils), cyclomethicones, phenylated silicones, phenyl trimethicones, trimethyl pentaphenyl trisiloxane, silicone polyether block copolymers and mixtures thereof.
- Suitable silicone poly ether copolymers may comprise from 1% to 50%, by weight of PEG, from 20% to 90% by weight of PPG, and from 1% to 20% by weight of silicone.
- the silicone polyether copolymer comprises at least 40%, more preferably at least 50%, most preferably at least 60%, by weight of PPG.
- the silicone polyether copolymer preferably comprises at least 10%, more preferably from at least 15%, most preferably from 15% to 30% by weight of PEO.
- the silicone polyether block copolymer comprises from 1% to 20%, preferably 10% to 20%, more preferably 15% by weight of silicone.
- silicone polyether block copolymers are known in the art to provide a number of benefits such as foaming, defoaming, wetting, deaeration and lubricity
- silicone block copolymers having from 20% to 90% by weight of PPO and from 1% to 50% of PEO further provide improved lubrication whilst ensuring the required level of water dispersion and or solubility, versus silicone polyether block copolymers having less or no PPO and more PEO.
- the inclusion of 1% to 20% of silicone by weight of the silicone polyether block copolymer provides desirable levels of lubrication despite being present at low levels in the polymer.
- the copolymers are block copolymers and may have a linear block or pendant graft structure.
- the silicone polyether block copolymer preferably has a ratio of PEO units to PPO units of from 3.0 to 0.1, preferably from 2.0 to 0.1, more preferably from 0.6 to 0.25.
- the silicone polyether block copolymer preferably has a ratio of PEO units to PPO units to silicone units of from 20:65:15.
- the silicone polyether copolymer may have a molecular weight of from 10000 to 19000 Daltons, more preferably from 10000 to 15000 Daltons.
- Suitable silicone polyether copolymers are available from Momentive under the SIL WETS® trademark products including L7210, L7602, L7220, L7230, L7500, preferably L7210 and L7602.
- Non-limiting examples of commercially available silicone oils include Dow Corning 200 fluid, Dow Coming 244, Dow Coming 245, Dow Corning 344, and Dow Coming 345, (commercially available from Dow Coming Corp.); SF-1204 and SF-1202 Silicone Fluids (commercially available from G.E.
- Suitable triglycerides may have the following formula: in which R, R’, and R” may be the same as, or different from, one or both of the others, and in which each of R, R’, and R” is a fatty acid and the triglyceride is solid at 25°C.
- Suitable oils from which triglycerides may be formed include, but are not limited to, the oils listed herein.
- Suitable fatty acids for formation of triglycerides include, but are not limited to, Myristoleic acid, Palmitoleic acid, Sapienic acid, Oleic acid, Linoleic acid, a-Linolenic acid, Arachidonic acid, Eicosapentaenoic acid, Docosahexaenoic acid, Lauric acid (C12), Myristic acid (C14), Palmitic acid (Cie), Stearic acid (Cis), Arachidic acid (C20) and mixtures thereof.
- triglycerides suitable for inclusion herein include Shea Butter, Theobroma Cacao (Cocoa) Seed Butter, Cocoa Butter, Mangifera Indica (Mango) Seed Butter, Kokum Butter, and mixtures thereof. Particularly preferred are shea butter, cocoa butter and mixtures thereof.
- Preferred liquid phase components may be selected from capric and or caprylic triglycerides, olive oil, shea butter, cocoa butter, petrolatum, isopropyl isostearate, dimethicones, phenylated silicones, silicone polyether block copolymers and mixtures thereof.
- the silicone polyether block polymers are particularly advantageous as they may facilitate the dispersion of the water-soluble polymer in the lipophilic structurant as discussed hereinafter and may also improve lubrication.
- the lubricating member may optionally further comprise a hydrophobic compound or mixtures thereof.
- the lubricating member may comprise from 1% to 40%, preferably from 5% to 40%, more preferably from 10% to 40%, even preferably from 12% to 30% by weight of a hydrophobic compound and or mixtures thereof.
- Suitable hydrophobic compounds include natural oils, waxes, and/or fats; synthetic waxes or oils; triglycerides; skin active agents; sensates; fragrance oils; silicones; and mixtures thereof.
- the hydrophobic compound can provide a number of in use benefits such as lubrication, skin feel, skin health, and cooling sensation.
- the hydrophobic compound may comprise skin active agents such as, but not limited to, oil soluble vitamins, such as vitamin E derivatives, including vitamin E acetate and tocopherol nicotinate; oil-soluble vitamin A derivatives, such as retinyl palmitate; lanolin; ceramides; sterols and sterol esters; salicylic acid; camphor; eucalyptol; essential oils; peppermint oil, ISO E SUPER® [(l-(l,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)ethanone] (International Flavors & Fragrances Inc.); and mixtures thereof.
- oil soluble vitamins such as vitamin E derivatives, including vitamin E acetate and tocopherol nicotinate
- oil-soluble vitamin A derivatives such as retinyl palmitate
- lanolin such as retinyl palmitate
- lanolin such as lanolin
- ceramides such
- the hydrophobic compound may comprise one or more sensates.
- synthetic coolants many are derivatives of, or are structurally related to, menthol, i.e., containing the cyclohexane moiety, and derivatized with functional groups including carboxamide, ketal, ester, ether, and alcohol.
- Non-limiting examples include menthyl ethylamido oxalate (under the tradename FRESCOLAT® X-COOL® from Symrise), menthyl lactate (such as FRESCOLAT® ML Natural available from Symrise), and menthyl pyrrolidone carboxylate, also known as menthyl PCA (under the tradename QUESTICE® from Givaudan).
- Hydrophobic compounds may be selected from capric and or caprylic triglycerides, grape seed oil, olive oil, micro-crystalline wax, shea butter, cocoa butter, lanolin, essential oil, peppermint oil, isohexadecane, petrolatum, silicone polymers including waxes and oils (selected from dimethicones, phenylated silicones and mixtures thereof), and mixtures thereof.
- the lubricating member may optionally comprise any other ingredients commonly found in commercially available lubricating members and skin care products more generally
- the lubricating member may therefore contain other conventional lubricating member ingredients, including water- swell able release enhancing agents such as cross-linked polyacrylics (e.g., 2% to 7% by weight), colorants, skin feel/care actives such as water-soluble cationic polymers, surfactants, soaps (including interrupted soaps), antioxidants, preservatives, emollients, beard softeners, astringents, medicinal agents, plasticizers, additional lubricants, depilatories/keratolytic materials, tackifiers, skin-soothing agents, fragrances, compatibilisers, anti-inflammatory agents, antipruritic/counterirritant materials, and mixtures thereof.
- These ingredients may fall under the definition of hydrophobic compounds as used herein and should be included as such in determining the amount of the hydrophobic compound(s).
- An exemplary lubricating member in accordance with the present disclosure may comprise PGA material embedded in a HIPS matrix at a level of 5% to 90% by weight of the lubricating member and may be processed at a temperature of between 300°F and 500°F.
- the lubricating member may comprise HIPS (34.875%); PGA material (54 875%); processing aids at 10% including poly caprolactone (CAPA 6506) and polyethylene glycol (Carbowax 4600 PEG); and an antioxidant at 0.25% (Irganox).
- the lubricating member is formed by extrusion at a temperature of greater than 365°F.
- the lubricating member may be formed using any method known in the art such as molding
- the method comprises the steps of providing a feed comprising the lubricating material and any additional materials that may be included such as the matrix material, and/or additional optional ingredients and forming the mixture by molding, pressing, impregnating, spray-coating, calendaring, printing, and/or extruding the mixture to form a solid lubricating member.
- the lubricating member may be formed separately from the hair removal device or formed directly onto a portion of the hair removal device, including the hair removal head.
- the PGA material may be provided as a particulate powder.
- the powder may have an average particle size of 250 microns.
- the particulates have an average particle size distribution of from 10 to 1200 microns and preferably from 50 to 1000 microns, more preferably 840 microns.
- the particulate size may be such that 90% of particles pass through a 20 mesh screen, i.e., 90% of particles are less than about 840 microns in diameter.
- Mesh size is defined as the number of openings in one square inch of a screen, i.e., a 20 mesh screen will have 20 openings in one square inch.
- the lubricating member may comprise PGA material in the form of discrete particles, in which at least 90% of the discrete particles have a size less than 840 microns.
- Particle size was measured according to ASTM E2651-19 section 14 (laser diffraction) using a Beckman Coulter LS 13 320 XR Particle size analyzer with a dry powder module.
- FIG. 4 illustrates an exemplary method 400 for forming a lubricating member for use in a hair removal device, in accordance with the present disclosure.
- a matrix material is provided.
- the matrix material may be a polymer, such as EVA or HIPS, and/or a molecular structurant, such as behenyl alcohol.
- a lubricating material is provided.
- the lubricating material may preferably be PGA material.
- the matrix material is blended with the lubricating material to form a mixture.
- a lubricating member is formed from the mixture, after which the method 400 may conclude.
- forming the lubricating member may comprise a process selected from a group consisting of extrusion, melt-formation, molding, pressing, and printing.
- the lubricating member may be extruded. Extrusion is particularly preferred where the lubricating member comprises a matrix material which is a matrix polymer such as HIPS or EVA.
- the lubricating components can be pre-mixed prior to mixing with the matrix polymer.
- the extrusion process generally consists of blending the components, which generally requires that the matrix material be melted with heat.
- the blended components may be extruded (e.g., which applies shear), such as through a HAAKETM System 90 (Thermo Scientific) % inch ( ⁇ 1 .91 cm) diameter extruder with a barrel pressure of 1000 psi to 2000 psi (—6.90 MPa - 13 8 MPa), a rotor speed of 10 rpm to 50 rpm, and a temperature of 150°-185°C and a die temperature of 170°-185°C.
- a 114 inch (—3.
- 18 cm) single screw extruder may be employed with a processing temperature of 175°-200°C, preferably 185°-190°C, a screw speed of 20 rpm to 50 rpm, preferably 25 rpm to 35 rpm, and an extrusion pressure of 1800 psi to 5000 psi (-12.4 - 34.5 MPa), preferably 2000 psi to 3500 psi (—13.8 MPa - 24.1 MPa).
- the extruded lubricating member may be cooled to 25°C by any conventional means (i.e , air cooling).
- the matrix polymer is generally heated above its glass transition temperature.
- the matrix polymer may be chosen to allow for lower processing temperatures.
- the matrix polymer may be EVA and may have a glass-transition temperature less than 130°C.
- the blended components may be extruded through a Rondol 18, 18 mm diameter extruder with a barrel pressure of 500-1000 psi, a rotor speed of 10 to 50 rpm, and a temperature of 100°- 160° C and a die temperature of 100°-160° C.
- a 1! inch single screw extruder may be employed with a processing temperature of 100°-160° C, preferably 110-130° C, a screw speed of 20 to 50 rpm, preferably 25 to 50 rpm, and an extrusion pressure of 1800 to 7500 psi, preferably 4000 to 6500 psi.
- Other extrusion conditions can also be employed.
- extruded strip is cooled to 25° C
- one or more feeds can be preheated or they can be fed in at ambient temperature.
- Methods for forming extruded lubricating members comprising EVA are further described in U.S. Patent No. 5,349,750 and U.S. Patent Application Publication Nos. 2017/0334082 and 2018/0117780.
- the lubricating member may be injection molded.
- the blended components may first be extruded into pellets. This can be done on a 114 or 114 inch ( ⁇ 3. 18 cm or 3.81 cm) single screw extruder at a temperature of 120°C-180°C, preferably 140°C-150°C, with a screw speed of 20 rpm to 100 rpm, preferably 45 rpm to 70 rpm.
- the pellets are then molded (with or without re-melting) in either a single material molding or multi-material molding machine, which may be single cavity or multi-cavity, and optionally equipped with a hot- runner system.
- the process temperature can be from 165°C to 250°C, preferably from 180°C to 225°C.
- the injection pressure should be sufficient to fill the part completely without excess flashing. Depending on the cavity size, configuration and quantity, the injection pressure can range from 300 to 2500 psi ( ⁇ 2.07 - 17.2 MPa).
- the cycle time is dependent on the same parameters and can range from 3 to 30 seconds, with the optimum generally being 6 to 15 seconds.
- the lubricating member may be manufactured using a melt forming process. Melt forming is particularly preferred where the lubricating member comprises a matrix material which comprises a molecular structurant such as behenyl alcohol. In such processes, the ingredients are heated and stirred until melted. The molten material is then transferred into a mold, and the temperature is reduced. Optionally, pressure may be applied. The lubricating member is removed from the mold upon cooling.
- melt forming is particularly preferred where the lubricating member comprises a matrix material which comprises a molecular structurant such as behenyl alcohol.
- the ingredients may be premixed in one fashion or another.
- the process may include combining a lipid phase (e.g., comprising the lipophilic structurant) and a liquid phase as previously discussed.
- the lipid phase and/or the liquid phase may include the lubricating material, or the lubricating material may be added as a separate phase.
- the lipid phase may comprise a lipophilic structurant.
- the lipid phase may comprise from 10% to 70%, preferably from 10% to 60%, more preferably from 20% to 40%, even more preferably from 25% to 35% by weight of the lubricating member of a lipophilic structurant.
- the lubricating member may be provided in the form of a tablet, bar or other solid form comprising compressed powder.
- the lubricating member may be manufactured whereby the lubricating material and other solid dry components (if included) are provided as particulates and mixed.
- the particulate material(s) is solid at 25°C and preferably has a melting point of 30°C or more.
- the lubricating member thus may comprise from 10% to 90% by weight of a particulate material(s) of the lubricating material.
- the lubricating member may comprise from 40% to 90% lubricating material
- the lubricating member may be formed by compression such as cold compression as disclosed in U.S. Patent Application Publication No. 2011/0041865.
- the lubricating member may comprise greater than 90% of the lubricating material up to and including 100% of the lubricating material (absent the preserving agent(s) of the present invention).
- the lubricating member may be formed by compression such as ultrasoniccompression as disclosed U.S. Patent Application Publication No. 2012/0023763.
- compression refers to a process by which the bulk density of a particulate or powder is reduced to form a solid by the application of pressure. Typically, this is performed without the application of external shear force or heat.
- the compression compaction is conducted below the melting point of at least one, preferably all, the particulate components, preferably at ambient temperature of 25°C. As such, the particulates retain their integrity after the compression process and are typically visible by the naked eye after the compression process is completed.
- additional energy sources such as heat or ultrasonic energy may be applied during or after compression to increase inter-particulate bonding and increase the rigidity of the resulting lubricating member.
- Application of additional energy preferably does not result in any substantial melting of the particulate material.
- this method does not require an extrusion or injection molding step or the application of energy sources such as heat.
- the lubricating member may thus be provided in the form of a compressed solid formed from particulates.
- the lubricating member is compressed preferably directly into a preform or container, such as a tray. This may be achieved using any method and equipment known in the art in the art such as a die press.
- the bulk density of the particulate material prior to compression is typically 300 to 600 kg/m 3 and increases to 1000 to 1200 kg/m 3 following compression. Bulk density thus may be increased by 200% to 400% after the compression.
- particulate compression manufacturing preferably cold particulate compression (i.e., at 25°C or less)
- cold particulate compression i.e., at 25°C or less
- the lubricating material may be printed onto the razor cartridge, which may include components such as but not limited to, the lubricating member or composition, razor blade, and cartridge housing.
- the lubricating member or composition may be modified with a lubrication control printed pattern as disclosed in U.S. Patent Application Publication No. 2016/0199990.
- sample containing PGA material (Sample 1) had a higher viscous module and elastic modulus than the samples containing PEG (Samples 2-5).
- Viscosity Synergy Testing The viscosity synergy between PGA and PEO as depicted in Figure 5 is discussed above.
- the synergy of the combined lubricating materials is shown as the gain in viscosity for the combination of materials versus either material alone. This can be calculated using the Gambill Method which compares the experimentally observed viscosity to the expected viscosity for the mixture.
- the gain is defined as:
- Vb viscosity of the second lubricating material (tested under the same conditions)
- the sample lubricating members were produced by adding 0.5g of each powder blend into a CarverTM hot press die at 300°F and 4000 PSI for 30 seconds.
- the test included lubricating members containing a PEO-based lubricating member (Control) or a lubricating member in accordance with the present disclosure (Experimental), as set out in Table 3 above. Panelists hydrated the lubricating member, applied it to their skin, and then rated the performance of the lubricating member on a scale from 1 to 5 with 1 being the worst performance and 5 being the best performance.
- the lubricating members were rated for glide over the skin (Glide), providing the right amount of lubrication (Lubrication), ease of rinse (Rinse), and leaving skin feeling smooth and/or soft (Skin Feel).
- the average performance scores are listed in Table 4 below.
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Abstract
L'invention concerne un élément lubrifiant pour un dispositif de rasage, l'élément lubrifiant comprenant un matériau lubrifiant, le matériau lubrifiant comprenant un matériau à base d'acide polyglutamique (PGA). L'invention concerne également une composition lubrifiante comprenant : un matériau de matrice et un matériau lubrifiant, le matériau lubrifiant comprenant un matériau PGA et le PGA représentant au moins 5 % du poids de la composition lubrifiante. L'invention concerne aussi un procédé de formation d'un élément lubrifiant correspondant, un support de rasoir avec un corps dont la surface supérieure s'étend le long d'un premier plan et dont la surface inférieure opposée s'étend le long d'un second plan. L'invention concerne en outre une saillie s'étendant à partir de la surface supérieure. L'invention concerne de plus anneau élastomère positionné sur la saillie.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US202217944839A | 2022-09-14 | 2022-09-14 | |
US17/944,839 | 2022-09-14 |
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WO2024059429A1 true WO2024059429A1 (fr) | 2024-03-21 |
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ID=88197130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2023/073044 WO2024059429A1 (fr) | 2022-09-14 | 2023-08-29 | Élément lubrifiant comprenant de l'acide polyglutamique |
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WO (1) | WO2024059429A1 (fr) |
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