Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
  • A61L26/0004—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing inorganic materials
• • 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
  • A61K8/25—Silicon; 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
  • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
  • A61K8/28—Zirconium; 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
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
  • A61K8/585—Organosilicon compounds
• • 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
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
  • A61L26/0009—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials
  • A61L26/0019—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2525—Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]

Definitions

• the present invention relates to deodorant and/or antiperspirant compositions and more particularly compositions in the form of soft solids, to the manufacture of such compositions and their use in controlling perspiration, especially in the axilla.
• Soft solid antiperspirant/deodorant products which contain silicone elastomers.
• a potential problem with such soft solid antiperspirant/deodorant products is their aesthetics. More specifically, such products can have a heavy, greasy feel. The present invention solves this problem.
• Emulsion sticks contain a solution of the antiperspirant active incorporated in the stick via an emulsion. Although emulsion sticks may be desirable in certain respects, many tend to be unstable, have poor aesthetics and leave a visible or sticky residue on the skin after use.
• Suspensoid sticks contain the powdered antiperspirant active suspended in the stick without the use of water or an emulsion.
• the present invention provides an excellent antiperspirant or deodorant composition which has increased esthetic properties as mentioned above.
• the compositions of the invention are anhydrous antiperspirant/deodorant compositions which are suspensoids which can be in the form of soft solids.
• Patents and patent documents related to this field of invention are as follows:
• U.S. Pat. No. 5,919,437 discloses a solid cosmetic composition (e.g. a cream) containing an active cosmetic material and a silicone gel material.
• U.S. Pat. No. 6,007,799 discloses a clear cosmetic gel composition in the form of a water-in-oil emulsion, and methods of forming and using the composition.
• U.S. Pat. No. 5,922,308 discloses an underarm treatment composition including a deodorant and/or antiperspirant active, a crosslinked non-emulsifying siloxane elastomer and a volatile siloxane.
• U.S. Pat. No. 5,922,309 discloses an underarm treatment composition including a deodorant and/or antiperspirant active, and cyclomethicone in hexameric form.
• U.S. Pat. No. 5,942,215 discloses an antiperspirant stick composition suitable for topical application to human skin comprising; an effective amount of an antiperspirant astringent; a volatile silicone; a structurant; and a cross-linked or partially cross-linked non-emulsifying siloxane elastomer.
• reduced syneresis e.g. reduced syneresis of silicone material therefrom
• the invention relates to an antiperspirant/deodorant soft solid compositions with improved aesthetics including one or more of lack of greasiness, improved or drier feeling, improved “glide” and better payoff.
• the invention relates to antiperspirant/deodorant soft solid compositions comprising:
• the invention also relates to a method of controlling body odor and perspiration by contacting human skin with a composition of the invention.
• a soft solid herein indicates the composition is a cream, commonly a viscous material which flows when subjected to a pressure between 10 to 40 mPa (about 1.5 to 6 psi).
• % means weight % unless otherwise indicated.
• the starting materials used in making the compositions of the invention are either known or can be made according to known methods.
• the compositions of the invention can be made by known methods or they can be made by methods which are analogous to those which are known in the art.
• the invention relates to antiperspirant/deodorant soft solid compositions which comprise:
• the invention relates to a method for reducing or controlling perspiration or odor which comprises administering to the underarm area an effective amount of a composition of the invention.
• compositions of the invention comprise:
• the invention also relates to a method for reducing or controlling perspiration or odor which comprises administering to the underarm area an effective amount of a composition of the invention.
• the present invention is described primarily in connection with an antiperspirant or deodorant composition, including antiperspirant and deodorant soft solids compositions.
• the present invention is not limited to such compositions; for example, the composition according to the present invention can be a sunscreen composition.
• the composition can be an insect repellent composition, a sunscreen composition, an anti-fungal composition, etc.
• U.S. Pat. No. 4,322,400 to Yuhas which is hereby incorporated by reference.
• the present invention will primarily be described in connection with antiperspirant and deodorant compositions, for application to the skin, particularly in axillary regions of the human body, in order to reduce body malodor, e.g., by reducing the flow of perspiration in the axillary regions
• the present invention is not limited to these specific uses, and, as described previously, can include various active cosmetic materials in order to achieve specific cosmetic effects for the skin.
• deodorant active materials and “antiperspirant active” materials are discussed. Both types of materials contribute to reduction of body (for example, axillary) malodor.
• reduction of body malodor is meant that, generally, there is less body malodor after application of the composition to a person's skin, as compared to body malodor of the person without application of the composition.
• Such reduction can be due to one or more of a masking of the malodor; absorption and/or chemical reaction of the malodorous materials; reduction of the levels of the bacteria producing the malodorous materials, e.g. from perspiration; and reduction of perspiration, etc.
• the antiperspirant materials when utilized in appropriate amounts, primarily act to reduce malodor by reducing production of perspiration; the antiperspirant materials can also have a deodorant function, e.g., as an antimicrobial agent.
• the deodorant active materials do not substantially reduce the production of perspiration, but reduce malodor in other ways, e.g., as fragrances masking the malodor or reducing the malodor intensity, as odor adsorbents, as antimicrobial (bacteriostatic) agents, as agents chemically reacting with malodorous material, etc.
• compositions are described as including or comprising specific components or materials, or methods are described as including or comprising specific processing steps, it is contemplated by the inventors that such compositions and methods of the present invention include variations which consist essentially of, or consist of, the recited components or materials, or the recited steps. Accordingly, throughout the present disclosure, any described composition of the present invention can consist essentially of, or consist of, the recited components or materials, and any method can consist essentially of, or consist of, the recited steps.
• anhydrous cosmetic composition e.g., a solid (solidified) cosmetic composition
• an active cosmetic material selected from the group consisting of deodorant active materials, antiperspirant active materials, sunscreen materials, insect repellents and anti fungal agents
• a silicone gel material that acts to improve the aesthetics of the composition, but said gel does not act as a structurant for the composition
• a wax that acts as a structurant for the composition.
• the silicone gel material includes an organopolysiloxane material and a volatile silicone material.
• the active cosmetic material e.g., antiperspirant active metal salt
• silicone elastomers when included in compositions of the invention at low levels, that is from about I to about 7%, more preferably about 4%, that they do not function as structurants but instead provide compositions with good aesthetic properties such as silky feel. Silicone elastomers also reduce the likelihood that the final product will undergo syneresis. It has also been found that low levels of silicone elastomers when used in conjunction with specific waxes results in compositions with outstanding aesthetic properties.
• Such waxes can be selected from the group consisting of beeswax, spermaceti, camauba wax, bayberry, candedilla, montan wax, ozokerite, microcrystalline wax such as Multiwax 180 from Witco and triglyceride Wax such as Syncrowax HGL-C from Croda. Microcrystalline wax is preferred.
• Various silicones can be used as the polyorganosiloxane of the silicone gel material of the present invention. These silicone gels can be combined with a volatile silicone material (e.g., cyclomethicone) to form the silicone gel material of the present invention.
• a volatile silicone material e.g., cyclomethicone
• the organopolysiloxane material is a silicone rubber, which can be swollen by the volatile silicone material so as to form the silicone gel material.
• the silicone gel material can be made, e.g., by mixing or blending the silicone rubber and volatile silicone material (for example, cyclomethicone) at a high shear rate.
• the organopolysiloxane material is a reaction product using a polysiloxane as a reactant.
• the reaction takes place in the presence of a diluent, preferably a volatile silicone material, such that the volatile silicone material can easily be incorporated within a matrix of the reaction product so as to provide the silicone gel material.
• a diluent preferably a volatile silicone material
• the volatile silicone material is most preferably cyclomethicone.
• the reaction can take place in the presence of other diluents, commonly miscible with organopolysiloxanes, such as dimethicone, phenyl trimethicone, esters, hydrocarbons, or ethers.
• Thickening agents have been made via platinum catalysed hydroxylation reactions used to form networks. These cross-linked structures are the result of reactions between a polysiloxane containing 2 or more ⁇ Si—H groups, and a polysiloxane containing 2 or more ⁇ Si-vinyl groups. This technology has been used to gain patents applicable to the personal care market.
• Silicone gels are made by reacting an ⁇ Si—H containing polysiloxane with an alpha, omega-diene. The reaction is conducted in the presence of a platinum catalyst and in the presence of an organic or silicone matrix, often of low molecular weight. The reaction is continued until a gel forms by crosslinking (addition of the ⁇ Si—H across double bonds) of the siloxane with the alpha, omega-diene.
• Examples of the materials synthesized in this manner include, but are not limited to, DC 9040 silicone elastomer blend; and DC 9010 silicone elastomer blend; and DC 9070 elastomer blend.
• silicone gel material Another material which can be utilized as the silicone gel material according to the present invention is the product KSG-17 of Shin-Etsu Chemical Co., Ltd. (Tokyo, Japan). This material is described as a cyclic dimethylsilicone thickener which is a colorless, transparent paste and utilizes octamethylcyclotetrasiloxane (cyclomethicone) as the base fluid.
• cyclic dimethylsilicone thickener which is a colorless, transparent paste and utilizes octamethylcyclotetrasiloxane (cyclomethicone) as the base fluid.
• silicone gel material Another material which can be utilized as the silicone gel material is GRANSIL SR-CYC, a product of Grant Industries, Inc. (Elmwood Park, N.J.). This product is a mixture of cyclomethicone and stearyl-vinyl/hydromethylsiloxane copolymer.
• silicone gel material Another material which can be utilized as the silicone gel material is SF 839 GE from GE.
• the reaction between the vinyl-terminated siloxane polymer and the hydride cross-linking agent is preferably performed in the presence of a platinum catalyst.
• platinum catalysts for this reaction are available from Huls America, Inc., designated as CPC072, CPC075 and CPC085.
• the reaction product (hydroxylation product) used as the organopolysiloxane material according to the present invention includes materials used in other areas such as in the electronics area, and includes room temperature vulcanized (RTV) silicones.
• RTV room temperature vulcanized
• the volatile silicone material utilized in providing the silicone gel material for forming the composition of the present invention can be conventional cyclic and linear volatile silicones, acting as a swelling agent for the organopolysiloxane.
• the volatile silicone can be a cyclomethicone, including (but not limited to) octamethylcyclotetrasiloxane (tetramer component) and decamethylcyclopentasiloxane (pentamer component) and dodecamethylcyclopentasiloxane (hexamer component) or mixtures of two or more thereof.
• Linear volatile silicones known in the art, commonly containing between 4 and 6 silicone units could also be used as the volatile silicone material for forming the silicone gel material according to the present invention.
• the organopolysiloxane is formed by reacting a vinyl-terminated siloxane polymer and a hydride cross-linking agent (e.g., a hydride-containing silicone), the reaction takes place in the presence of the volatile silicone material (as well as in the presence of a platinum catalyst), whereby the swelled material (silicone gel material), having the volatile silicone material trapped in a matrix of the gelling agent, is easily achieved.
• a hydride cross-linking agent e.g., a hydride-containing silicone
• the polyorganosiloxane material is about 3% to about 13% by weight, of the total weight of the silicone gel material.
• the silicone gel material can then be about 2 to about 30% of the total composition. These amounts are merely illustrative, and are not limiting of the present invention.
• the reaction can take place in the presence of other diluents such as dimethicone, phenyl trimethicone, esters, hydrocarbons, or ethers.
• the silicone gel material can be formed by blending the organopolysiloxane and volatile silicone material together, such that the volatile silicone material causes the organopolysiloxane to swell.
• a silicone rubber e.g., a cross-linked polydimethylsiloxane
• cyclomethicone can be mixed in a high shear blender, homogenizer or sonolator at ambient temperature, to form gelled cyclomethicone as the silicone gel material.
• the silicone gel material can be included in the cosmetic composition in an amount of 1%-30% by weight, of the total weight of the cosmetic composition.
• Compositions according to the present invention can be made by mixing the silicone gel material with cyclomethicone, and structuring waxes, heating until the waxes are fully melted, then adding the antiperspirant or deodorant active and any other ingredients which are commonly used in antiperspirant and deodorant compositions such as silica, talc, perfumes, and nonvolatile oils. Then, the product is poured into molds and cooled.
• the composition is an antiperspirant composition containing an antiperspirant active material for reducing perspiration in axillary regions
• the composition is extruded from inside the dispensing canister through the slots onto the top surface of the dispensing canister, and from there is applied (rubbed) on the skin in the axillary regions, so as to deposit sufficient antiperspirant active material (and, if present, sufficient deodorant active material) so as to reduce perspiration and reduce body malodor originating in axillary regions of the human body.
• compositions within the scope of the present invention are set forth. These specific examples are illustrative of the present invention, and are not limiting. In these Examples, the amounts of the components are in weight percent, of the total weight of the composition.
• compositions of the invention may further comprise a diluent fluid or mixture which is miscible with volatile silicones.
• the diluents commonly can comprise liquid non-volatile organopolysiloxanes, such as non-volatile dimethicone, or phenyl trimethicone, or liquid hydrocarbons.
• Suitable non-volatile dimethicones commonly have a viscosity of from about 50 to 1000 cSt (mPa.s) and are available from Dow Coming Inc. within their range of DC200 dimethicones.
• the diluent fluids can be present in an amount of up to about 20% by weight, for example from 5 to 15% by weight.
• a suitable weight ratio range for the volatile silicones to diluent fluids such as non-volatile dimethicones of viscosity 100 to 500 cSt comprises from 10:1 to 2.5:1, particularly 8:1 to 4:1.
• volatile hydrocarbons indicates volatile water-immiscible materials comprising a hydrocarbon chain which optionally can further comprise an embedded ether or ester linkage.
• compositions of the invention comprise one or more waxes.
• the wax is a structurant which provides thermal stability to the soft solid compositions of the invention.
• the wax allows for the use of less fatty alcohol structurants in the compositions of the invention than are used in conventional stick products.
• the wax may be selected from the group consisting of beeswax, spermaceti, camauba wax, bayberry, candedilla, montan wax, ozokerite, ceresin, paraffin, synthetic waxes, and microcrystalline wax.
• Microcrystalline wax (CTFA trade name) is preferred.
• the microcrystalline wax named MULTIWAX 180M from WITCO is used in compositions below.
• compositions of the invention also contain combinations of more than one wax as noted above.
• Nonlimiting examples of other waxes which can be included in the compositions of the invention are castor wax, stearyl alcohol and most preferably SF 1642.
• SF 1642 is C30-C45 alkyl dimethicone and is available from General Electric, Connecticut.
• SF 1632 which is cetearyl methicone is available from General Electric and can also be used in compositions of the invention.
• compositions of the invention may further comprise synthetic waxes.
• Synthetic waxes provide compositions of-the invention with properties such as thermal stability, improved structuring properties, less syneresis, and they allow for the use of less overall wax in the composition and thereby provide for compositions which leave less waxy residue upon application.
• Synthetic waxes that are particularly preferred are carbonyl-containing such as mixtures of long chain wax esters, glycerides, and fatty acids.
• Often synthetic waxes that are particularly preferred can have the following advantages over natural waxes: provide stable uniform properties in emulsion sticks, provide intrinsic structural attributes that allow for high powder formulations, and provide structural integrity to solid emollient preparations without compromising the liquid feel of their payoff. Additionally, they may contribute less odor to the composition than natural waxes.
• Nonlimiting examples of synthetic waxes which can be used in compositions of the invention are as follows: C18-C36 saturated fatty acid waxes; ethylene glycol diesters of C18-C36 saturated fatty acid waxes; triglycerides of C18-C36 saturated fatty acid waxes; the triglyceride of behenic acid (which is called glyceryl tribehenate); a partial calcium salt of triglycerides of C18-C36 saturated fatty acid waxes; and synthetic beeswax.
• Synthetic waxes are commercially available from Croda under the following tradenames:
• a most preferred synthetic wax is SYNCROWAX HGL-C.
• a wax system a combination of a synthetic wax containing a carbonyl group, as for example in a glyceride wax, with a hydrocarbon wax, of which a particularly preferred example comprises MultiwaxTM 180 or a hydrocarbon wax of similar melting point, i.e. melting point preferably greater than 75° C.
• a particularly preferred example comprises MultiwaxTM 180 or a hydrocarbon wax of similar melting point, i.e. melting point preferably greater than 75° C.
• the weight ratio of the waxes is desirably selected in the range of from 5:1 to 1:2, and particularly 3.5:1 to 1.5:1 synthetic to hydrocarbon waxes.
• the antiperspirant active in the compositions of the invention is present at from about 1 to about 50% and is a particulate material selected from the group consisting of aluminum zirconium complexes, aluminum chlorohydrates, aluminum chlorohydroxide and mixtures thereof.
• Aluminum zirconium trichloro hydrex-Gly is preferred.
• the present compositions contain from about 15% to about 50% by weight of a particulate antiperspirant material, especially up to about 30%. These weight percentages are calculated on an anhydrous metal salt basis (exclusive of glycine, the salts of glycine; or other complexing agents).
• the particulate antiperspirant material preferably has particle sizes ranging from about 1 to about 100 microns, more preferably from about 1 to about 50 microns. They may be in impalpable or microscopic in form and preferably have a high bulk density (e.g. greater than about 0.7 g/cm 3 ). Such materials include, for example, many aluminum or zirconium astringent salts or complexes and are well known in the art.
• Any aluminum astringent antiperspirant salt or aluminum and/or zirconium astringent complex in particulate form can be employed herein.
• Salts useful as astringent antiperspirant salts or as components of astringent complexes include aluminum halides, aluminum hydroxyhalides, zirconyl oxy halides, zirconyl hydroxyhalides and mixtures of these salt materials.
• Aluminum salts of this type include aluminum chloride and the aluminum hydroxy halides having the general formula Al 2 (OH) x Q y XH 2 O where Q is chlorine, bromine, or iodine; x is from about 2 to about 5, and x+y is about 6 and x and y do not need to be integers and where X is from about 1 to about 6.
• Aluminum salts of this type can be prepared in the manner described more fully in U.S. Pat. No. 3,887,692 to Gilman, U.S. Pat. No. 3,904,741 Jones and Rubino, both of which are herein incorporated by reference.
• zirconium salts which are useful in the present invention include both zirconium oxy salts and zirconium hydroxyl salts, also referred to as zirconyl hydroxy salts. These compounds may be represented by the following general empirical formula:
• z may vary from about 0.9 to about 2 and need not be an integer
• n is the valence of B
• 2-nz is greater than or equal to
• B may be selected from the group consisting of halides, nitrate, sulfamate, sulfate, and mixtures thereof.
• zirconium and aluminum compounds are exemplified in the specification, it will be understood that other metals such as the Group IV B metals, including hafnium could be used in the present invention.
• the above formula is greatly simplified and is intended to represent and include compounds having coordinated and/or bound water in various quantities as well as polymers, mixtures and complexes of the above.
• the zirconium hydroxy salts actually represent a range of compounds having various amounts of the hydroxy group, varying from about 1.1 to only slightly greater than 0 groups per molecule.
• ZAG complexes useful herein are identified by the specification of both the molar ratio of aluminum to zirconium (the AI:Zr ratio) and the molar ratio of total metal to chlorine (metal:Cl) ZAG complexes useful herein have an AI:Zr ratio of from about 1.67 to about 12.5 and a metal:Cl ratio of about 0.73 to about 1.93.
• Activated ZAG compounds may be employed as the particulate antiperspirant active in the compositions of the present invention.
• Activated ZAG compounds may be prepared by heating an aqueous solution containing an aluminum chlorhydroxide component and mixing it with a zirconium hydroxy chloride component.
• compositions of the invention may further comprise rheological additives which add thixotropic body or control of syneresis in the suspensoid stick compositions of the present invention.
• rheological additives which add thixotropic body or control of syneresis in the suspensoid stick compositions of the present invention.
• Such materials may also assist in easy or controlled processing of the composition whilst in molten form before it is filled into molds.
• Non-limiting examples of such rheological additives include trihydroxystearin; a modified glycerol tris-12-hydroxystearate such as Thixatrol ST available from Rheox Inc., aluminum stearate, stearamide MEA, sorbitol acetal, and fumed or precipitated silica, talc, and mixtures thereof.
• Trihydoxystearin and fumed silicas are preferred rheological additives in compositions of the invention.
• Trihydoxystearin can be obtained as THIXCIN R and THIXCIN GR from Rheox Inc. It is also available as FLOWTONE from Southern Clay Products. THIXCIN R comes as a finely divided white powder with a melting point of about 86° C.
• THIXCIN R is an organic derivative of castor oil.
• THIXCIN GR is an inorganically modified derivative of THIXCIN R.
• Rheological additives are desirably included in compositions of the invention at about 0.1% to about 2.0%, more preferably at about 0.2% to about 1.5%.
• compositions of the invention may also comprise elastomers, and especially silicone elastomers. Moreover, the degree of crosslinking of silicone elastomers affects their performance in the compositions of the invention.
• Preferred silicone elastomers for use in the invention are polydiorganosiloxanes, preferably derived from suitable combinations of R 3 SiO 0.5 units and R 2 SiO units where each R independently represents an alkyl, alkenyl (e.g. vinyl), alkaryl, aralkyl, or aryl (e.g. phenyl) group. R is most preferably methyl.
• the preferred crosslinked silicone elastomers of the invention are cross-linked polydimethyl siloxanes (which have the CTFA designation dimethicone), optionally having end groups such as hydroxyl or methyl.
• One preferred elastomer of the invention is DC 9040, an example of a non-emulsifying elastomer.
• the cross linker used in DC 9040 is an alpha, omega aliphatic diene of the following structure:
• x ranges from 1-20.
• a gel is formed by crosslinking and addition of Si—H across double bonds in the alpha, omega -diene.
• the following Dow Corning patent describes the DC 9040: U.S. Pat. No. 5,654,362.
• Another preferred elastomer which can be used in compositions of the invention is SF 839 from General Electric.
• Another elastomer which can be used in compositions of the invention is DC 3-2365.
• Another preferred elastomer of the invention is Silicone/Urethane Copolymer.
• the structure of the urethane cross-linker is given below:
• silicone-urethane copolymer The tradename for the silicone-urethane copolymer is Polyderm PP I-SI-100. The supplier is Alzo Incorporated, Matawan, N.J.
• elastomers are the following: Dow Coming crosslinked, ethoxylated silicone gels branded as DC 9010 or a combination of such gels.
• the degree of crosslinking of the silicone elastomers is suitably from about 0.05% to about 35%, preferably being in the range of about 0.15% to about 7%, more preferably from about 0.2 to about 2%.
• Suitable emulsion polymerized cross-linked silicone elastomers are commercially available or can be readily made using conventional techniques well known to those skilled in the art.
• Silicone polymers of the invention include cross-linked polydimethyl siloxanes and polymonomethyl siloxanes optionally having end groups such as hydroxyl or methyl.
• Suitable emulsion polymerized cross-linked silicone polymers are commercially available or can be readily made using conventional techniques well known to those skilled in the art.
• the most preferred silicone elastomer is cyclomethicone (and) dimethicone crosspolymer. It is described above and is sold under the tradename Dow Coming 9040. It is a mixture of a high molecular weight silicone elastomer (dimethicone crosspolymer) in cyclomethicone. Its physical form is as a paste.
• Elastomers can be included in compositions of the invention at about 0.1 to about 30%.
• Elastomers impart a silky feel to the compositions of the invention and also reduce syneresis of the final product.
• compositions of the invention may also contain a skin moisturizing agent such as a hydroxylated agent selected from the group consisting of glycerin, sorbitol, and sodium hylauronate. It is highly desirable in at least some embodiments to incorporate up to 60%, alternatively 0.01 to 10%, or 0.1 to 5% moisturizing agent; and especially from about 0.5 to 2.5% by weight, moisturizing agent.
• the moisturizing agent may be glycerin at up to about 60%; or at about 0.1 to about 10%; or at about 1.0 to about 4.0%.
• fragrances can be incorporated into the anhydrous, topically-effective composition in an amount of from 0% to about 5% based on the total weight of the composition.
• the composition of the present invention when applied to skin, therefore fixes a substantive fragrance film on the skin that resists moisture, but that can be removed by washing.
• Other optional ingredients that can be included in the anhydrous compositions of the present invention include, but are not limited to, drying agents, like talc or DRY FLO (aluminum starch octenylsuccinate); preservatives; and dyes.
• Such optional ingredients are present in a composition of the present invention in an amount of about 10% or less by weight.
• an organoclay can be included in a composition of the present invention as an additional suspending agent in an amount of up to 20% by weight of the composition.
• An organoclay is especially helpful as an anticaking agent to maintain a particulate topically-effective compound homogeneously dispersed throughout the composition.
• An exemplary organoclay is a quaternized three-layer clay.
• compositions of the invention may be prepared as described herein, and may be prepared by methods which are known in the art or which are analogous to methods which are known in the art
• a specific composition of the invention which has been made has the following formulation:
• compositions of the invention provide increased thermal stability without giving up the aesthetics including “glide”, fragrance, payoff, color and good odor control.
• compositions of the invention provide effective antiperspirant activity and odor control.
• Compositions of the invention have less grittiness, are easier to wash off, require less time for dry-down, feel drier upon application, are easier to spread, and have less stickiness.
• compositions of the invention have excellent thermal stability at temperatures as high as about 115 to about 122° F. (about 86 to 90° C.)
• the compositions of the invention which comprise an elastomer have a “silky” feel upon application.
• the compositions of the invention which comprise triglycerides have a lotion-like feel upon application, while the compositions of the invention which lack triglycerides also have a very good powdery or talc-like feel upon application.
• Trained sensory panel assessments of the compositions of the invention could be carried out to demonstrate their advantageous properties.
• the trained panel assessments could include human sensory testing.
• the advantageous properties of the compositions of the invention have been described above.
• compositions according to the invention are described in Examples 2 to 5 hereinbelow.
• Example No 2 3 4 5 Ingredient Wt. % Cyclopentasiloxane Balance Dimethicone 8.0 9.0 10.0 11.0 Microcrystalline Wax 3.25 3.0 2.0 1.5 Triglyceride Wax 3.25 5.0 6.0 6.5 Silicone Elastomer DC 9040 4.0 4.0 4.0 Silica 0.75 1.0 1.5 1.25 AZG 23.5 24.5 25.5 22.5 Glycerin 0.5 1.0 1.5 2.0 Fragrance 0.5 0.7 0.85 1.0

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• 2001
  • 2001-05-10 EP EP01929635A patent/EP1286649A1/de not_active Withdrawn
  • 2001-05-10 WO PCT/EP2001/005311 patent/WO2001089464A1/en not_active Application Discontinuation
  • 2001-05-10 CN CN01813224.3A patent/CN1443062A/zh active Pending
  • 2001-05-10 MX MXPA02011440A patent/MXPA02011440A/es unknown
  • 2001-05-10 CA CA002409222A patent/CA2409222A1/en not_active Abandoned
  • 2001-05-10 RU RU2002134482/15A patent/RU2002134482A/ru not_active Application Discontinuation
  • 2001-05-10 AU AU2001256347A patent/AU2001256347A1/en not_active Abandoned
  • 2001-05-11 US US09/853,727 patent/US20020001572A1/en not_active Abandoned
  • 2001-05-22 EG EG20010537A patent/EG23005A/xx active
  • 2001-05-23 AR ARP010102439A patent/AR028610A1/es unknown
• 2003
  • 2003-07-16 US US10/479,877 patent/US8021683B2/en active Active

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