Classifications

• • 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
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0216—Solid or semisolid forms
  • A61K8/0229—Sticks
• • 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
  • A61K8/06—Emulsions
• • 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
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
• • 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
  • A61K8/92—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

Definitions

• This invention relates to cosmetic compositions in stick form.
• compositions for application to the human skin which are in stick form are emulsions, and contain an antiperspirant active.
• Such stick compositions may typically be used in conjunction with a stick holder.
• Antiperspirant compositions for use on the human skin are well known.
• Antiperspirant actives tend to be predominantly (although not exclusively) metal salts, for example aluminium or zirconium salts such as aluminium chloride, aluminium chlorohydrate, activated aluminium chlorohydrate and zirconium hydroxychloride, to name but a few, which are intended to reduce or prevent perspiration at the skin surface, in particular on the underarm.
• topical antiperspirant compositions from a user's perspective is that they are sensorially pleasing when applied to the human skin.
• a significant proportion of users appreciate a so-called “cooling” feeling when the antiperspirant composition is applied.
• such a "cooling" sensation tends to be found primarily only in deodorant compositions, which do not comprise an antiperspirant active material.
• a stable emulsion cosmetic composition in stick form which can typically be an antiperspirant stick composition, which comprises a relatively high level of ethanol .
• the ethanol provides a remarkably good cooling effect when the composition is applied.
• the stability of the composition is aided by being in emulsion form, since the simple addition of ethanol to an ordinary suspension antiperspirant stick composition can cause it to soften undesirably.
• compositions which are free of waxes and conventional gelling agent. These typically comprise in combination a volatile silicone fluid, silicone emulsifier, a destabilizing auxiliary emulsifier, water, a non-volatile emollient, a coupling agent, an activated antiperspirant component and ancillary agents.
• Exemplified compositions contain ethanol, but at an upper limit of 4% by weight of the composition.
• an emulsion antiperspirant composition suitable for topical application to the human skin in a stick form, comprising an antiperspirant active material, water, a hydrophobic phase, an emulsifier and ethanol, characterised in that it comprises at least 10% by weight of the composition of ethanol.
• the composition comprises between 10 and
• the composition comprises from 12% to 18% ethanol. If the composition contains less than about 10% ethanol, insufficient cooling benefit is obtained, whereas if the composition contains more than about 25% ethanol, there is a tendency for the composition to be too soft .
• the emulsifier preferably this is present in the composition at a level of from 0.1 to 10%, more preferably from 0.1 to 5% and most preferably from 0.2 to 1%, though the exact amount may vary according to the other components in the composition.
• the emulsifier may be any suitable emulsifier, although it is preferred that it is a water-in-oil emulsifier, and has an HLB value of less than 8, preferably in the region 5-6.
• the emulsifiers included in the composition may comprise a surfactant, such as sorbitan fatty esters, polyoxyethylene sorbitol derivatives, polyoxyethylene lanolin derivatives, polyoxyethylene fatty esters, polyoxyethylene propylene glycol stearate, polyoxyethylene stearates, polyoxyethylene sorbitan fatty esters, and the like.
• a surfactant such as sorbitan fatty esters, polyoxyethylene sorbitol derivatives, polyoxyethylene lanolin derivatives, polyoxyethylene fatty esters, polyoxyethylene propylene glycol stearate, polyoxyethylene stearates, polyoxyethylene sorbitan fatty esters, and the like.
• Specific suitable emulsifiers include lauryl dimethicone copolyol .
• Particularly preferred emulsifiers include cetyl dimethicone copolyol and PEG 7 hydrogenated castor oil (e.g. Arlacel 989, ex Imperial Chemical
• composition according to the invention also comprises a hydrophobic phase, which typically comprises a structurant, which may be present at a level of 2 to 30% by weight, more preferably 10 to 25% by weight of the composition.
• a "structurant" is a material which is effective at physically and/or chemically altering the composition to provide a stick which is stable at ambient conditions.
• Suitable structurants include long chain (e.g. Cie to C 2 a) fatty acids, gellants such as fatty acid soaps and dibenzylidine alditol acetals, synthetic and natural waxes, and other known structurants.
• Suitable waxes include high melting point waxes, for example those having a melting point in the region of 75- 130°C, and include for example silicone waxes, beeswax, carnauba, baysberry, canelilla, montan, ozokerite, ceresin, and hydrogenated castor oil (castor wax) .
• Suitable synthetic waxes include Fischer-Tropsch waxes and microcrystalline waxes. Examples of suitable waxes may be found in CA-A-2 , 152 , 754 (The Mennen Company).
• Combinations of waxes or structurants may also be used to provide a stick with the required hardness.
• a particularly preferred combination is stearyl alcohol with hydrogenated castor oil.
• a most preferred combination is paraffin wax with hydrogenated castor oil.
• composition according to the invention may also comprise as part of the hydrophobic phase other materials which are typically found in such hydrophobic phases, such as one or more oils.
• the antiperspirant active in the composition may be any known antiperspirant active provided it is emulsifiable in the system, but may particularly comprise a metal salt, based on aluminium and/or zirconium.
• the antiperspirant active material will typically be present in the composition at a level of 10% by weight or more, in order to provide antiperspirant benefit. Typically, the composition will contain no more than 25% by weight of the antiperspirant active.
• antiperspirant metal salts a non-limiting list of antiperspirant metal salts is provided by the FDA in "Antiperspirant drug products for over the counter human use, a tentative final monograph" , Federal Register 47:36592 (1982).
• the composition also comprises water, which may be typically be present in the composition at a level of from 5 to 60%, preferably from 10 to 35% by weight, more preferably from 15 to 25% by weight.
• the cosmetic composition so formed is an emulsion product with sufficient rigidity to form a stick of sensorially satisfactory hardness, which can readily be applied from a suitable container, such as a stick barrel.
• the composition additionally comprises a masking oil, which can typically be present at a level of 3-40% by weight of the composition.
• Suitable masking oils include for example polydecene, polybutene, PPG-14 butylether, non-volatile silicones, isopropyl myristate, isopropyl palmitate, C 12 -C ⁇ 5 alkyl benzoates, and mineral oils.
• the antiperspirant composition according to the invention may comprise other ingredients, depending on the properties required in the finished product.
• ingredients which can optionally be present in a composition according to the invention include: - cosmetically acceptable vehicles other than ethanol such as straight and branch chain lower alcohols, for example isopropanol, or isobutanol;
• - other volatile and non-volatile silicones such as dimethyl cyclosiloxanes , such as Dow Corning fluids DC 344 and DC 345, or polydimethylsiloxane, having a viscosity in excess of 5 mm s "1 , for example from 50 to 100 mm 2 s ⁇ 1 , such as Dow Corning 200 Fluids (standard viscosities 50-1000 mm 2 s "1 );
• deodorants including deodorising levels of other metal salts, deoperfumes, and deodorant compounds which can also act as antimicrobial agents, such as unsaturated fatty acids, or other antimicrobial agents, e.g. Irgasan DP300, ex Ciba Geigy;
• oils such as liquid paraffin oils
• - skin feel improvers such as talc and finely divided polyethylene, an example of which is Acumist B18;
• humectants such as polyols, for example glycerol; - emollients;
• composition represents a suitable composition according to the invention.
• compositions according to the invention can typically epared by melting together all components of the composition except the aqueous active and the perfume oil, typically at a temperature of 75°C and under reflux to retain volatile components. The composition is then subjected to high shear, and the aqueous antiperspirant active is slowly added. The composition is sheared at a suitable speed and for adequate time to provide a stable emulsion. The composition is then cooled and the perfume oil added, and then cooled further to an appropriate pouring temperature, and poured into stick barrels
• the object of this example is to measure the cooling obtained for compositions according to the invention to those containing lower or no levels of ethanol/water .
• This example further demonstrates the cooling effect of emulsion sticks, compared to homogenous antiperspirant sticks containing ethanol.
• compositions were tested under a similar thermal imaging test to that described in Example 3, again with two compositions C and D, which are anhydrous antiperspirant suspension sticks containing aluminium chlorohydrate and 15% and 20% ethanol respectively, and a commercially available deodorant stick containing ethanol- (E) .
• the following samples according to the invention were subjected to a sensory panel.
• the sticks were assessed for cooling, immediately after application and 2 minutes later.
• the comparative example was a typical alcoholic deodorant stick product.
• the scoring used by the panellists ranges from 100 to 0. Zero being maximum coolness.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Birds (AREA)
• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Emergency Medicine (AREA)
• Cosmetics (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=10803828

Family Applications (1)

Country Status (9)

Families Citing this family (7)

Family Cites Families (5)

• 1996
  • 1996-12-02 GB GBGB9625070.9A patent/GB9625070D0/en active Pending
• 1997
  • 1997-11-21 JP JP52516798A patent/JP2001504846A/ja active Pending
  • 1997-11-21 EP EP97953719A patent/EP0951273A2/en not_active Withdrawn
  • 1997-11-21 WO PCT/EP1997/006675 patent/WO1998024404A2/en not_active Application Discontinuation
  • 1997-11-21 AU AU57525/98A patent/AU5752598A/en not_active Abandoned
  • 1997-11-21 BR BR9713815-0A patent/BR9713815A/pt not_active IP Right Cessation
  • 1997-11-21 HU HU0000495A patent/HUP0000495A3/hu unknown
  • 1997-12-01 AR ARP970105629A patent/AR009648A1/es unknown
  • 1997-12-01 ZA ZA9710790A patent/ZA9710790B/xx unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events