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
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
  • A61K8/26—Aluminium; Compounds thereof
• • 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
  • A61K8/8105—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
• • 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
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• • 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
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
  • A61K8/893—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone modified by an alkoxy or aryloxy group, e.g. behenoxy dimethicone or stearoxy dimethicone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/30—Characterized by the absence of a particular group of ingredients
  • A61K2800/31—Anhydrous

Definitions

• the invention relates to novel cream underarm compositions which contain a structuring wax material. More particularly, the invention concerns antiperspirant and deodorant compositions for topical application to the human skin, containing structuring wax, a clay material and a masking oil.
• underarm compositions for topical application to contain non-volatile silicone fluids such as polyorganosiloxanes which impart emolliency to the composition and can provide a masking effect to conceal solids present in the composition.
• non-volatile silicone fluids such as polyorganosiloxanes which impart emolliency to the composition and can provide a masking effect to conceal solids present in the composition.
• solids include antiperspirant actives.
• the efficacy of the composition is not seriously affected by the presence of the non-volatile silicone.
• An example of such compositions is to be found in EP 28853 (The Procter & Gamble Company) .
• EP 549223 (Dow Corning) describes stick, roll on and spray underarm compositions containing certain long chain alkyl silicone waxes.
• the waxes are alleged to provide the formulations with desirable characteristics such as improved hardness, reduced whitening, improved skin feel and compatibility with other ingredients.
• suspension compositions which are generally preferred to the already known emulsion compositions which have been found to produce undesirable sensations on the skin such as a sticky or wet feeling.
• the suspending agent facilitates the efficient suspension of powder materials such as antiperspirant actives in the composition to enhance efficacy and stability of the composition on storage.
• suspending agents of the prior art whilst improving skin feel in some respects (e.g. reducing the wet sensation) impart other undesirable sensations to the skin such as grittiness and can also result in visible deposits on the skin and fabrics.
• EP135315 (The Mennen Company) describes a clay free antiperspirant product containing a volatile silicone and a gelling agent.
• the omission of the clay suspending agent can result in a product which is still unstable at high temperatures and over prolonged periods and which has a lowered viscosity which can be undesirable in cream formulations.
• An object of the invention is to overcome the disadvantages of the formulations of the prior art.
• a substantially anhydrous underarm cream composition suitable for topical application to the human skin, comprising an antiperspirant and/or deodorant agent, 0.5% to 3% by weight of a clay suspending or thickening agent, 5.0% to 25% by weight of a non-volatile masking agent, 3 to 20% by weight of a structuring wax having a melting point of at least 45°C, and 20 to 90% volatile carrier fluid, obtainable by shearing together at least the antiperspirant and/or deodorant agent, the clay, the masking agent, the carrier fluid and the wax above the melting point of said wax.
• the underarm cream composition comprises 1% to 2% by weight of clay.
• the clay is selected from the group comprising bentonites, smectites, saponites, reacted variants thereof and mixtures thereof.
• the underarm composition comprises 5% to 15% by weight structuring wax and the structuring wax is selected from the group comprising alkyl methyl siloxane waxes, alkyl ester siloxane waxes, insect and animal waxes, fatty acids, fatty alcohols, fatty acid esters and fatty acid amides and mixtures thereof .
• the alkyl methyl siloxane wax is a wax having a general formula I:
• R is a C16-C40 alkyl group, X is 10 to 50, and Me is a CH 3 group and the average terminal alkyl chain length is at least C30.
• R is a C25-C40 alkyl group.
• alkyl ester siloxane wax is a wax of general formula II:
• Me is CH 3 ;
• R is a straight or branched chain alkyl from C 10 H 21 to C 30 H 61 .
• R is C 19 H 39 , a is 1 and b is 3 . O 97/161 1
• the non-volatile masking oil is selected from the group comprising non-volatile silicones and polyolefins or mixtures thereof. More preferably, the polyolefin is polydecene.
• the volatile carrier fluid is a volatile silicone.
• the antiperspirant agent is an inorganic and/or organic source of aluminum and zirconium or a mixture thereof.
• the invention provides a substantially anhydrous cream antiperspirant composition
• a substantially anhydrous cream antiperspirant composition comprising 5 to 30% by weight antiperspirant agent, 0.5% to 3% by weight of a clay suspending or thickening agent, 5% to 25% by weight of a non-volatile masking agent, 3% to 20% by weight of a structuring wax having a melting point of at least 45°C and 20 to 86.5% volatile carrier fluid, obtainable by shearing together at least the antiperspirant, the masking agent, the carrier fluid and the clay and the wax at a temperature equal to or above the melting point of said wax.
• creams are defined in terms of cone penetration values.
• a typical cream can be described as having a cone penetration value of between approximately 10mm and 30mm where the cone has a diameter of 16.5mm and a weight of 102.5g.
• Suitable clays are hectorires and montmorillionites including bentonites, smectites, saponites and reacted variants thereof.
• a preferred bentonite is Bentone 38 available from NL Industries.
• a single clay or a blend of clays can be used.
• antiperspirant salts include inorganic and organic salts of aluminium and zirconium and mixtures thereof. Particularly preferred are the aluminium/zirconium salts of aluminium halides, aluminium hydroxyhalides, aluminium zirconium salts and mixtures thereof. Particularly preferred antiperspirant salts include activated aluminium chlorohydrate compounds as described in EP6739 (Unilever NV et al) . Further antiperspirant actives are described in EP 28853. The contents of both these applications are incorporated herein by reference.
• any effective deodorant composition known in the art is suitable for incorporation into the composition e.g. sodium bicarbonate, zinc ricinoleate, other inorganic salts, short chain monohydric alcohols, polyhydric alcohols or compounds such as triclosan.
• the deodorants can be utilised alone or in conjunction with the antiperspirant active component where compatible.
• the carrier fluid suitably comprises a volatile silicone material.
• volatile silicone material examples include cyclic or linear polydimethylsiloxanes.
• Preferred cyclic polydimethylsiloxanes have from 3 - 7 silicone atoms and a viscosity less than 10 mm 2 s "1 (cSt) at 25°C.
• Preferred linear polydimethylsiloxanes have from 3 - 9 silicone atoms and a viscosity of less than 5 m ⁇ rs "1 at 25°C.
• Preferred polydimethylsiloxanes are available from Dow Corning Corporation as Dow Corning 344 and 345.
• the volatile silicone is present at a level of 30 to 60% by weight, more preferably 40 to 60% by weight.
• the non-volatile masking agent is also present in the formulation and preferably comprises a hydrocarbon polymer such as poly olefins.
• the poly olefins are suitably hydrocarbon polymers, with the preferred ones being liquid at room temperature (i.e. 21°C) . It is also highly preferred that the poly olefin in the composition has a relatively low viscosity. Preferably, the viscosity of the poly olefin hydrocarbon masking agent is less than about 40 cSt at 40°C, more preferably less than about 30 cSt at 40°C.
• the poly olefin comprises a poly alpha olefin.
• Preferred poly alpha olefins for use in compositions according to the invention are polydecenes, for example the Silkflo range of polydecenes, manufactured by Albermarle Corporation.
• Other preferred poly olefins for use in compositions according to the invention include polybutene, which is commercially available under the trade name Panalene
• preferred poly olefins for use in compositions according to the invention may have monomer chain lengths in the region of 3-15 carbon atoms.
• Preferred poly olefin blends which are commercially available may conveniently contain a blend of various polymers, including dimers, trimers, and so on.
• Preferred materials for use in compositions according to the invention include Silkflo 362NF, Silkflo 364NF, and Silkflo 366NF, available from Albermarle Corporation.
• the poly olefin hydrocarbons described help to confer to the composition surprisingly good sensory properties, including a surprising lack of greasiness after application, and where the composition is an antiperspirant composition, provide an enhanced degree of masking of any whiteness that may be left by the antiperspirant salt in the composition.
• poly olefin hydrocarbons An advantage of using the poly olefin hydrocarbons is that they have been found not to interfere with the efficacy of any antiperspirant active salt in the composition to any major degree.
• the non-volatile masking oil which can function as an emollient can also be a non-volatile silicone.
• the non ⁇ volatile silicone may be a polyalkyl siloxane, a polyalkaryl siloxane or a polyether siloxane copolymer.
• Preferred polyalkysiloxanes have viscosities ranging from 10 to 100,000 mm 2 s "1 (cSt) at 25°C. Such siloxanes are available from the Dow Corning Corporation as the Dow Corning 200 series.
• Suitable polyalkaryl siloxanes are the polymethylphenylsiloxanes having viscosities of 15 to 65mm 2 s "1 (cSt) at 25°C. These siloxanes are available as the Dow Corning 556 fluid.
• a suitable polyether siloxane is dimethyl polyoxyalkylene ether copolymer having a approximate viscosity of 1200 to 1500 mms ⁇ 1 (cSt) at 25°C e.g. a polysiloxane ethylene glycol ether copolymer.
• Preferred structuring waxes are the alkyl methylsiloxanes.
• Suitable alkyl methylsiloxanes include those having the general formula (I):
• the structuring waxes have been found to exhibit a significant masking effect on the formulations to conceal deposition of actives and suspending agents.
• the alkylmethylsiloxane wax preferably has a melting point of greater than 45°C.
• the alkylmethylsiloxane wax is made up of C16 to C40 alkyl groups, more preferably C25 to C35.
• such waxes will be made up of a blend of alkyl group chain lengths with the characteristics of the wax and hence its structuring effect being determined by the blend of chain lengths utilised.
• the waxes selected having terminal long alkyl chains are particularly effective at structuring the composition.
• Pendant C30 and upwards species and C16 to C18 terminal alkyl waxes sometimes result in excessively soft solids which may fail to keep a stable structure following heat storage which results in an excessively thin composition. Similar difficulties are experienced when the average terminal alkyl chain length is below C30.
• a preferred alkylmethylsiloxane wax is known as GE wax SF1642 available from the General Electric Company in which the main alkyl species are C30, C32 and C34 with minor amounts of C26 and C28.
• the structuring wax can also be an alkyl ester siloxane wax of general formula (II) :
• R is a straight or branched chain alkyl from C 10 H 21 to C 30 H 61
• R is a straight chain alkyl C 19 H 39 .
• a is suitably 1 and b is suitably 3.
• the wax used in compositions according to the invention is an alkyl ester silicone wax.
• the inclusion of this wax in the formulation may impart some emolliency to the composition. Accordingly, it is possible to do without, or reduce, the amount of emollient materials, such as volatile or non- volatile silicones, which are conventionally included in such compositions .
• a particularly preferred alkyl ester silicone wax for use in compositions according to the invention is a behenic acid silicone wax, which in general structure (II) has a value for a of 1 and for b of 3 , and in addition has R as C 19 H 39 .
• a wax is available from Rhone Poulenc under the tradename Mirasil-B 71649 wax.
• High melting point waxes include insect and animal waxes such as beeswax and spermaceti; vegetable waxes such as carnauba, candelilla, Ouricury, Japan wax, Douglas-fir bark wax, rice-bran wax, castor wax and bayberry wax; mineral waxes such as montan wax, peat wax, ozokerite and ceresin; petroleum waxes such as paraffin wax; synthetic waxes such as Fischer-Tropsch waxes, polyethylene waxes, chemically modified hydrocarbon waxes and substituted amide waxes.
• high melting point waxes include insect and animal waxes such as beeswax and spermaceti; vegetable waxes such as carnauba, candelilla, Ouricury, Japan wax, Douglas-fir bark wax, rice-bran wax, castor wax and bayberry wax; mineral waxes such as montan wax, peat wax, ozokerite and ceresin; petroleum waxes such as paraffin wax; synthetic wax
• low melting point waxes examples include fatty acids, fatty alcohols, fatty acid esters and fatty acid amides having carbon chains of 3 to 30 carbon atoms.
• Particularly preferred low melting point waxes include stearyl alcohol, cetyl alcohol, myristyl alcohol and palmitic acid.
• the wax structurant can be a single wax or blend of the aforementioned waxes selected to provide the desired melting point and skin feel characteristics. For instance, a combination of 6% SF1642 and 5% Castorwax MP80 is particularly effective and results in a wax structurant which shears at approximately 45°C.
• An anhydrous antiperspirant cream having the following formulation:
• Non-Volatile Hydrocarbon Deposit Masker 10.0 (Albemarle Silkflo 364NF)
• the cream was made by using the following four stages:
• Stage 3 5.0% Castorwax MP80, 6.0% GE Wax SF1642 Premelt waxes at 80°C and then add to main vessel with stirring at full speed.
• Example 1 The above cream in Example 1 was manufactured with the omission of Bentone.
• the Bentone was replaced by 1% volatile silicone carrier fluid and manufactured in the same way.
• 13/20 selected the Bentone-containing cream as less greasy than the non-Bentone control (significant difference at >86% confidence) .
• the Bentone containing composition was more viscous than the non-Bentone equivalent
• the Bentone containing composition when processed at 68°C, sheared for 10 minutes and then filled at 55 deg°C a composition having a viscosity ranging from 235,000 to 240,000 cps was obtained.
• the identical non-Bentone composition had a viscosity of 220,000 cps.
• the Bentone composition had a viscosity of 472,000 cps whereas the Bentone free composition had a viscosity of 360,000 cps.
• An anhydrous antiperspirant cream having the following composition was prepared as described in Example 1:
• a Carri-Med Controlled Stress Rheometer CSLIOO instrument was used.
• a vane/cup measuring system was employed with a mesh interior fitted to the cup to ensure prevention of wall slip. Experiments were carried out at 25°C unless otherwise stated. Equilibrium flow experiments were conducted on fresh samples to obtain the exact flow properties of the sample. The sample was allowed to equilibrate at a fixed temperature (25°C) for one hour before measuring to ensure no temperature gradient.
• Figure 1 shows the rheological properties of the composition of Example 2 when processed at 29°C, 45°C and 60°C. As shown in the Figure low temperatures did not result in a stable structured product. Low equilibrium viscosity figures are usually an indication that the product will show leakage of carrier fluid.
• Example 2 when processed at 29°C resulted in an unstable composition while the samples processed at 45°C and 60°C were significantly more stable and hence less disposed towards carrier leakage.
• Talc 5.0 organically modified smectite clay gelled in isopropyl myristate, from Steetley/NL Industries
• Waxenol 822 (8) 1.0 Diisopropyl dilinoleate (Pripure 3786 DIPD) 7.0

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• 1995
  • 1995-10-27 GB GBGB9521991.1A patent/GB9521991D0/en active Pending
• 1996
  • 1996-10-01 ZA ZA9608249A patent/ZA968249B/xx unknown
  • 1996-10-04 AU AU72851/96A patent/AU729120B2/en not_active Ceased
  • 1996-10-04 CA CA002234930A patent/CA2234930C/en not_active Expired - Fee Related
  • 1996-10-04 EP EP96934535A patent/EP0869770A1/en not_active Withdrawn
  • 1996-10-04 WO PCT/EP1996/004318 patent/WO1997016161A1/en not_active Application Discontinuation
  • 1996-10-04 PL PL96327241A patent/PL327241A1/xx unknown
  • 1996-10-04 BR BR9611179A patent/BR9611179A/pt not_active Application Discontinuation
  • 1996-10-04 HU HU9802997A patent/HUP9802997A3/hu unknown
  • 1996-10-04 JP JP9516107A patent/JP2000500434A/ja active Pending
  • 1996-10-04 RU RU98109939/14A patent/RU2189219C2/ru not_active IP Right Cessation
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