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
  • A61K8/18—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
• • 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
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/56—Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
• • 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
  • A61K2800/81—Preparation or application process involves irradiation

Definitions

• the present invention concerns the provision of a hair removal device comprising solid cosmetic compositions comprising heat sensitive components.
• a hair removal device incorporating a skin-engaging solid cosmetic composition comprising hydrophilic polymers to lubricate the skin.
• solid compositions are manufactured in a high temperature process involving heating to a temperature sufficient to melt all the components, then co-mixing in an extruder.
• Such a process has a number of disadvantages. In the first place, it necessitates actively heating to above the melting point of the highest melting point material, which is often above about 180 0 C. This is very energy intensive and therefore costly and environmentally unfriendly.
• temperature-sensitive materials such as some perfume oils, may flash off and be lost to the formulation.
• Fragrance compositions usually comprise a combination of different perfume oils which, together, provide a balanced impression to the user, but that balance may be lost if even just one or two of the perfume oils are lost by boiling off during manufacture.
• Other materials such as menthol, a sensate, which sublimes at low temperatures, may similarly be lost. Yet other materials may become degraded, modified or destroyed. All of these effects may result in a formulation which has a different composition from the intended one. These effects are also wasteful and costly.
• a hair removal device comprising a cold- pressed, solid lubricating composition, the cold-pressed, solid lubricating composition comprising a temperature- sensitive component, such as fragrance oil.
• a hair removal device comprising a solid lubricating composition
• the process comprising the steps of:
• i. is solid at STP; ii. has a molecular weight of less than or equal to 8,000,000, preferably from 100,000 to 3,000,000.
• the present invention overcomes problems associated with prior art hair removal devices which comprise compositions manufactured at high temperatures.
• the solution involves cold-pressing to manufacture the composition according to the first aspect of the invention.
• the hair removal device may be any hair removal device, such as, but not limited to, a razor or a hair removal device comprising a light source to degrade or destroy the hair.
• the hair removal device comprises a light source
• the light source is advantageously a source of laser light.
• the hair removal device is a razor.
• the solid lubricating composition may advantageously be provided on the razor cartridge, and is preferably as a strip located before and/or after the blade(s) in the direction of cutting.
• WO 97/02116 illustrates locations in which such a strip may be placed.
• STP Standard Temperature and Pressure
• the term “cold-pressed” means that the formulation has been manufactured by process involving a compression step, without any active heating and the term “cold-pressing” should be interpreted accordingly.
• heat generated by the compression step itself is not regarded as being active heating.
• temperature-sensitive component refers to materials which have a boiling point, undergo significant sublimation, or which undergo a change in chemical structure at temperatures above ambient temperatures and below 100 0 C. Materials having a boiling point in this range are known to the skilled person and include many low boiling point perfume oils. Low boiling perfume oils, or top notes, are those that provide the initial burst of fragrance following application to the skin, because they boil off quickly when exposed to body heat.
• the cold-pressed, solid lubricating composition may comprise a water-soluble lubricating polymer.
• the water-soluble lubricating polymer may achieve lubrication by a number of mechanisms, such as binding water to form a gel.
• the polymer In order to be effective, the polymer must be solid at STP and have a molecular weight of less than 8,000,000. Preferably, it has a molecular weight from 100,000 to 7,000,000.
• Suitable water-soluble lubricating polymers include polyalkylene glycol; cellulosic polymers, including hydroxypropyl cellulose; hydroxypropyl methylcellulose (HPMC); polyvinyl pyrrolidone; polyacrylamide; polyvinyl imidazoline;
• polyalkylene glycol is synonymous with “polyalkane oxide”, although some sources have, in the past, referred to lower molecular weight variants as “polyalkylene glycol” and higher molecular weight variants as “polyalkane oxide”.
• the polyalkylene glycol (polyalkane oxide) comprises polyethylene glycol (which may also be referred to herein as "PEG”), polypropylene glycol, or mixtures thereof and more preferably it comprises polyethylene glycol.
• the cold-pressed, solid lubricating composition preferably comprises from 20 to 80%, more preferably about 40 to 75%, by weight of water-soluble lubricating polymer.
• the water-soluble lubricating polymers comprise polyethylene oxides generally known as POLYOX (available from The Dow Chemical Company) or ALKOX (available from Meisei Chemical Works, Kyoto, Japan).
• these particular polyethylene oxides will have molecular weights of about 100,000 to about 6 million, preferably from about 300,000 to about 5 million and the polyethylene oxide comprises a blend of polyethylene oxide having an average molecular weight of about 5 million and polyethylene oxide having an average molecular weight of about 300,000.
• the solid lubricating composition comprises less than 2%, preferably less than 1% and more preferably 0% of water-soluble surfactant, by weight of the solid lubricating composition.
• water-soluble surfactant refers to surfactant which fulfils the following condition: at 25°C, Ig of the surfactant dissolves in 1000ml or less of water. For completeness, one requires more than 10,000ml of water at 25°C in order to dissolve Ig of magnesium stearate or Ig of cetyl alcohol.
• cold-pressed, solid lubricating compositions may comprise a hydrophobic binder.
• the presence of such a component may enhance the life of the composition by reducing its tendency to be mechanically eroded.
• the hydrophobic binder is solid at STP.
• Suitable hydrophobic binders include divalent metal cation stearate, preferably magnesium stearatte, calcium stearate, zinc stearate, or mixtures thereof, more preferably magnesium stearate; ethyl cellulose, polycaprolactone and mixtures thereof.
• the cold-pressed, solid lubricating composition comprises from 1 to 20% and more preferably from 5 to 15% hydrophobic binder, by weight of the cold-pressed, solid lubricating composition.
• cold-pressed, solid lubricating compositions may comprise a Cn - C 22 fatty alcohol, or mixtures thereof, preferably cetyl, stearyl, behenyl alcohol or mixtures thereof.
• the presence of a fatty alcohol may enhance the life of the composition by reducing its tendency to be dissolved in water.
• the cold-pressed, solid lubricating composition comprises from 1 to 20% and more preferably from 5 to 15% fatty alcohol, by weight of the cold-pressed, solid lubricating composition.
• perfume oils are usually fairly hydrophobic and may be repelled by hydrophilic materials, such as the water-soluble lubricating polymers disclosed herein. This fact may also contribute to perfume oils becoming squeezed out of the solid composition during compaction, thereby reducing the degree of perfuming and wasting raw material. The result tends to be an unsatisfactorily perfumed product.
• perfume oils comprised within the cold-pressed, solid lubricating compositions according to the invention may be releasably encapsulated within a powder.
• Any powder which permits perfume release in use, such as on contact with water, may suitably be used.
• the powder comprises a cyclic oligosaccharide, which may encapsulate the perfume.
• cyclic oligosaccharide means a cyclic structure comprising six or more saccharide units.
• Preferred for use herein are cyclic oligosaccharides having six, seven or eight saccharide units and mixtures thereof, more preferably six or seven saccharide units and even more preferably seven saccharide units. It is common in the art to abbreviate six, seven and eight membered cyclic oligosaccharides to ⁇ , ⁇ and ⁇ respectively.
• Cyclic oligosaccharides for use herein may comprise any suitable saccharide or mixtures of saccharides.
• suitable saccharides include, but are not limited to, glucose, fructose, mannose, galactose, maltose and mixtures thereof, preferably glucose.
• the preferred cyclic oligosaccharides for use herein are ⁇ -cyclodextrins or ⁇ - cyclodextrins, or mixtures thereof, and the most preferred cyclic oligosaccharides for use herein are ⁇ -cyclodextrins.
• the cyclic oligosaccharides for use herein may be substituted by any suitable substituent or mixture of substituents.
• mixture of substituents means that two or more different suitable substituents can be substituted onto one cyclic oligosaccharide.
• the derivatives of cyclodextrins consist mainly of molecules wherein some of the OH groups have been substituted.
• Suitable substituents include, but are not limited to, alkyl groups; hydroxyalkyl groups; dihydroxyalkyl groups; (hydroxyalkyl) alkylenyl bridging groups such as cyclodextrin glycerol ethers; aryl groups; maltosyl groups; allyl groups; benzyl groups; alkanoyl groups; cationic cyclodextrins such as those containing 2-hydroxy-3- (dimethylamino) propyl ether; quaternary ammonium groups; anionic cyclodextrins such as carboxyalkyl groups,
• substituents may be saturated or unsaturated, straight or branched chain.
• Preferred substituents include saturated and straight chain alkyl groups, hydroxyalkyl groups and mixtures thereof.
• Preferred alkyl and hydroxyalkyl substituents are selected from C1-C8 alkyl or hydroxyalkyl groups or mixtures thereof, more preferred alkyl and hydroxyalkyl substituents are selected from C1-C6 alkyl or hydroxyalkyl groups or mixtures thereof, even more preferred alkyl and hydroxyalkyl substituents are selected from C1-C4 alkyl or hydroxyalkyl groups and mixtures thereof.
• Especially preferred alkyl and hydroxyalkyl substituents are propyl, ethyl and methyl, more especially hydroxypropyl and methyl and even more preferably methyl.
• cyclic oligosaccharides for use in the present invention are unsubstituted, or are substituted by only saturated straight chain alkyl, or hydroxyalkyl substituents. Therefore, preferred examples of cyclic oligosaccharides for use herein are ⁇ -cyclodextrin, ⁇ -cyclodextrin, methyl- ⁇ -cyclodextrin, methyl- ⁇ -cyclodextrin, and hydroxypropyl- ⁇ -cyclodextrin.
• Polyox WSR-N750 powder a polyethylene glycol with molecular weigh about 300,000 manufactured by Dow Chemicals
• the above composition is manufactured by placing all materials into a blending device and blending until the mixture is entirely homogeneous. Once homogenised, the mixture is pressed into the desired shape using an appropriate mould tool / punch.
• An example of a suitable device is the GEA Courtoy R253-27 tablet press. The powder is compressed using a force of 1 x 10 10 - 1 x 10 12 Nm "2 . The resultant tablet is ejected from the mould in the desired shape.

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• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Birds (AREA)
• Epidemiology (AREA)
• Dermatology (AREA)
• Cosmetics (AREA)

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• 2010
  • 2010-08-16 BR BR112012003753A patent/BR112012003753A2/pt not_active IP Right Cessation
  • 2010-08-16 CN CN2010800370009A patent/CN102481241A/zh active Pending
  • 2010-08-16 WO PCT/US2010/045590 patent/WO2011022321A2/en not_active Ceased
  • 2010-08-16 MX MX2012002174A patent/MX2012002174A/es not_active Application Discontinuation
  • 2010-08-16 IN IN1371DEN2012 patent/IN2012DN01371A/en unknown
  • 2010-08-16 EP EP10172936A patent/EP2286787A3/en not_active Withdrawn
  • 2010-08-17 US US12/858,157 patent/US20110041339A1/en not_active Abandoned

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