WO2000044339A1

WO2000044339A1 - Antiperspirant composition with a high melting point wax

Info

Publication number: WO2000044339A1
Application number: PCT/EP2000/000456
Authority: WO
Inventors: Anthony Aloysius Scafidi; Rebecca Sue Moen Jenks; David Allen Brewster
Original assignee: Unilever Plc; Unilever Nv; Hindustan Lever Limited
Priority date: 1999-01-29
Filing date: 2000-01-20
Publication date: 2000-08-03
Also published as: AU2542700A; AR022442A1; EP1146848A1; BR0007758A

Abstract

Antiperspirant/deodorant stick compositions comprising: (a) a high melting point wax, (b) an emollient, and (c) a particulate antiperspirant active, are described.

Description

ANTIPERSPIRANT COMPOSITION WITH A HIGH MELTING POINT WAX

BACKGROUND OF THE INVENTION

A problem with antiperspirant/deodorant stick products is obtaining increased thermal stability without giving up the esthetics including "glide", payoff, color and odour. The present invention solves this problem.

As further background to this invention, it may be noted that many solid antiperspirants have been described in the chemical and cosmetic literature. These compositions generally tend to fall into one of two classes: emulsion sticks and suspensoid sticks. 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, they 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 thermal stability and the 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 sticks, ultradrys, soft solids or creams . Patents and patent documents related to this field of invention are as follows:

U.S. 5,156,834 discloses antiperspirant compositions comprising a particulate antiperspirant material, a bulking/suspending agent, a volatile silicone and a nonvolatile emollient.

US 5,885,559 discloses a solid antiperspirant composition, for application to a human, comprising: a) at least one active antiperspirant material, in an amount sufficient to have antiperspirant effect;

b) volatile silicone material;

c) linear chain silicone material; and

d) at least one gelling agent, the at least one gelling agent being included in the composition in an amount sufficient to thicken the composition so as to provide a solid composition, the at least one gelling agent including hexanediol-behenyl beeswax, the hexanediol- behenyl beeswax being included in the composition in an amount of 3-25% by weight of the total composition. U.S. Patents 5, 069,897; 4,937,069; and 5,019,375 are mentioned in the *559 patent.

US 5,102,656 - a creamy, heterogeneous anhydrous antiperspirant product and a method for making it. The product of the invention comprises essentially a volatile silicone product as a carrier, a gelling agent , and a physiologically acceptable antiperspirant agent.

U.S. Patent 4,049,792 discloses an antiperspirant composition in the form of a stick which comprises from about 1% to about 20% of a water-insoluble wax, from about 20% to about 50% of an essentially water insoluble, but water-dispersible, liquid emollient, and from about 30% to about 60% of an active aluminum or zirconium astringent antiperspirant salt in the form of finely divided particles, said composition being essentially water- insoluble with the exception of the active particles.

US 5,916,546 discloses a cosmetic stick deodorant composition comprising:

a) from about 0.5% to about 10.0% of the cosmetic stick deodorant composition of an astringent metal salt active;

b) a stable anhydrous base component comprising: i) from about 5% to about 40% of the cosmetic stick deodorant composition of a solidifying agent selected from the group consisting of high melting point waxes; and low melting point wax fatty alcohols, fatty acid esters and fatty acid amides, having fatty chains of about 8 to about 22 carbon atoms, and mixtures thereof; ii) from about 20% to about 70% of the cosmetic stick deodorant composition of a volatile emollients iii) from about 10% to about 50% of the cosmetic stick deodorant composition of non-volatile emollients;

c) from about 0.05% to about 10% of the cosmetic stick deodorant composition of a solubilizing agent having a hydrophilic-lipophilic balance (HLB) of greater than about 10.

US 5,968, 489 discloses antiperspirant compositions which comprise from about 0.1 to about 99.9% by weight of solubilized or solid antiperspirant active and from about 0.1 to about 99.9% by weight of a carrier which comprises 1, 3-hexanediol , preferably in combination with a volatile silicone liquid and dimethiconol as a coupling agent.

US 5,972,319 discloses an antiperspirant stick composition which comprises 17-40% gelling agent; 30-50% solvent, 10-30% antiperspirant active, 10-27% non-volatile emollient, and 1- 15% surfactant.

U.S. 5,976,514 discloses topical compositions which comprise from about 0.01% to about 60% by weight of an antiperspirant and/or deodorant active; from about 1% to about 60% by weight of a volatile, nonpolar hydrocarbon liquid having a solubility parameter of less than about 7.5 (cal/cm³) °'⁵ and a vapour pressure as measured at 25°C. of from about 0.1 mmHg to about 6.0 mmHg; and from about 1% to about 60% by weight of a skin irritation-mitigating material having a vapour pressure equal to or less than that of the volatile, nonpolar hydrocarbon liquid, preferably a silicone- containing liquid; wherein the weight ratio of the volatile. nonpolar hydrocarbon liquid to the mitigating material is from about 5:1 to about 1:50; and

WO 9926597 discloses at example 2 an antiperspirant stick composition comprising: 24% AZAG; 1% Estol E04DS; 4% Castor wax; 14% Lorol C18 deo; 3.2% talc; 1% perfume; 35.3% volatile DC345; and 17.5% Borage Seed Oil.

SUMMARY OF THE INVENTION

The invention relates to an antiperspirant/deodorant stick compositions with increased thermal stability; and esthetics including "glide", payoff, color, and odour, and which use less fatty alcohols than conventional deodorant sticks. The compositions of the invention comprise a high melting point wax.

More specifically, the invention relates to antiperspirant/deodorant stick compositions which comprise:

(a) about 0.1 to about 10 % of a high melting point wax;

(b) about 5 to about 40% of a non-volatile, non-toxic organic or silicone-based emollient, or mixtures thereof ; and

(c) about 15 to about 50% of a particulate antiperspirant active. The invention also relates to a method of controlling body odour and perspiration by contacting human skin with a composition of the invention.

DETAILED DESCRIPTION OF THE INVENTION

As used herein % means weight % unless otherwise indicated.

The invention relates to antiperspirant/deodorant stick compositions which comprise:

(a) about 0.1 to about 10% of a high melting point wax;

(b) about 5 to about 40% of a non-volatile, non-toxic organic or silicone-based emollient, or mixtures thereof; and

(c) about 15 to about 50% of a particulate antiperspirant active.

The invention also relates to a method of controlling body odour and perspiration by contacting human skin with a composition of the invention.

High Melting Point Wax

The high melting point wax is a structurant which provides thermal stability to the stick compositions of the invention without reducing the esthetics mentioned above. In addition the wax allows for the use of less fatty alcohols in the compositions of the invention than are used in conventional stick products. The high melting point wax is present in compositions at from about 0.1 to about 10 wt . % . The melting point of the wax can range from about 150-215°F, or about 65 to about

101^UC.

The high melting point wax may be present in compositions at from about 0.05 to about 10 wt . % . The high melting point wax may be any wax which melts from about 65 to about 104°C, or from about 65 to about 101°C, as noted above.

The high melting point wax is selected from the group consisting of beeswax, spermaceti, carnauba wax, bayberry, candedilla, montan wax, ozokerite, ceresin, paraffin and synthetic wax.

A very high melting point (melting point is greater than about 80°C such as about 80 to about 104°C) wax is especially preferred in compositions of the invention. Microcrystalline wax (CTFA trade name) which is a very high melting point wax (melting point is about 80 to 104 °C) is preferred. The microcrystalline wax named MULTIWAX 180M from WITCO is used in compositions below. Trihydroxystearin is also a preferred very high melting point wax. The very high melting point wax can be present in compositions of the invention at from about 0.1 to about 10 w . % .

Certain compositions of the invention also contain a low melting point wax which is described just below. Low Melting Point Wax

Low melting point waxes have a melting point range of about 25 degrees C to about 65 degrees C, more preferably about 37 degrees C to about 65 degrees C.

Non- limiting examples of low melting point 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 1642 is in between a low melting point wax and a high melting point wax:

wherein each R is individually an alkyl of C30 or greater and

wherein n is about 25.

It has a melting point about 60 to about 72 degrees C. SF 1632 which is cetearyl methicone is available from General Electric and can also be used in compositions of the invention and it has the chemical structure:

wherein x + y is about 1 to about 100, preferably about 4 ;

R¹ is C16-C18 linear alkyl; and

R² is C16-C18 branched alkyl.

It has a melting point about 25 to about 35 degrees C.

In the compositions of the invention, the low melting point wax serves to modify rheology for easier glide-on and the high melting point wax serves to give to the resulting composition improved thermal stability ( up tol22.5°F, and higher) ; and serves to give the resulting composition improved structurant properties.

Emollient

The emollient is present from about 5 to about 40% in compositions of the invention. It is a non-volatile, non- toxic organic or silicone based emollient. The emollient can be a mixture of organic and silicone based emollients. PPG- 14 butyl ether is preferred.

Other emollients suitable for use in the compositions of the present invention are known in the art and include a nonvolatile silicone oil, a high molecular weight polyol, an oil -surfactant , an aromatic ester, an aliphatic ester, and similar organic compound.

Antiperspirant Active

The antiperspirant active in the compositions of the invention is present at from about 15 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.

As noted above, the present compositions contain from about 15% to about 50% by weight of a particulate antiperspirant material . 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/cm³) . 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

Al₂ (OH) _xQ_yXH₂0 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 USP 3,887,692 to Gilman, USP 3,904,741 Jones and Rubino, both of which are herein incorporated by reference.

The 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 :

ZrO (OH) _2-nzB_z

wherein 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 0, and B may be selected from the group consisting of halides, nitrate, sulfamate, sulfate, and mixtures thereof. Although only 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.

As with the basic aluminum compounds, it will be understood that 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. As will be seen from the above formula 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.

Several types of antiperspirant complexes using the above antiperspirant salts are known in the art. For example, 3,792,068 Luedders et al . , herein incorporated by reference, discloses complexes of aluminum, zirconium and amino acids such as glycines. Complexes such as those disclosed in Luedders and other similar complexes are commonly known as

ZAG ( OR Zag) . ZAG complexes are chemically analyzable for the presence of aluminum, activated ZAG compounds and chlorine. ZAG complexes useful herein are identified by the specification of both the molar ratio of aluminum to zirconium (the Al : Zr ratio) and the molar ratio of total metal to chlorine (metal :C1) ZAG complexes useful herein have an Al : Zr ratio of from about 1.67 to about 12.5 and a metal :C1 ratio of about 0.73 to about 1.93.

Another patent which discloses ZAG compounds is USP

4,985,238 to Tanner et al . This just-mentioned patent is herein incorporated by reference . Preferred ZAG complexes are described in USP 4,985,238 to Tanner et al .

Another patent which discloses activated ZAG compounds (AZAG or AZG compounds) is USP 5,486,347 to Callaghan et al . This just -mentioned patent is herein incorporated by reference. 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 . Synthetic Waxes

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 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. Non-limiting 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 bees wax.

Synthetic waxes are commercially available from Croda under the following tradenames :

SYNCROWAX BB-4;

SYNCROWAX HRS-C; SYNCROWAX HR-C; SYNCROWAX HGL-C; SYNCROWAX ERL-C; and SYNCROWAX AW-1C

A most preferred synthetic wax is SYNCROWAX HGL-C.

Rheological Additives

Compositions of the invention may further comprise rheological additives which add thixotropic body or control of syneresis in the emulsion stick compositions of the present invention. Nonlimiting examples of such rheological additives include trhydroxystearin, also known as tris-12- hydroxystearate; a modified glycerol tris- 12 -hydroxystearate such as Thixatrol ST available from Rheox Inc., sodium stearate, aluminum stearate, stearamide MEA, sorbitol acetal, and fumed silica, 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 Elementis Specialties of Belgium. It is also available as FLOWTONE from Southern Clay Products. THIXCIN R comes as a finely divided white powder with a mp of about 86°C.

THIXCIN R is an organic derivative of castor oil. THIXCIN GR is an inorganically modified derivative of THIXCIN R.

Inorganic thickeners such as talc and fumed silica may also be included in the compositions of the invention.

Rheological additives are included in compositions of the invention at about 0.1% to about 2.0%, more preferably at about 0.2% to about 1.5%.

Elastomers

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 R₃SiO₀.₅ units and R₂SiO 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 2-9040.

DC 2-9040 Cross-linking Chemistry is as follows.

The cross linker used in the DC 2-9040 is an alpha, omega aliphatic diene of the following structure:

CH₂=CH(CH₂)_XCH=CH₂, where 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 2-9040: US 5,654,362. This just mentioned US patent is hereby incorporated by reference.

Another preferred elastomer of the invention is DC 3-2365.

The structure of the cross-linker used in DC 3-2365 is given below:

wherein x + y = 7 to 24 Another preferred elastomer of the invention is Silicone/Urethane Copolymer.

The structure of the urethane cross-linker is given below:

The tradename for the silicone-urethane copolymer is Polyderm PPI-SI-100. The supplier is Alzo Incorporated, Matawan, New Jersey.

Other preferred elastomers are the following: an elastomeric resinous material which is a silicone polymer having a) a backbone with the following structure: R₃SiO (R^I ₂SiO)_m (R¹¹ R¹¹¹ SiO)_nSiR₃, where m is 1-250, n is 0-250, R, R¹, R¹¹ are alkyl groups containing 1-6 carbon atoms, and R¹¹¹ = CH₂CHCH₂0(CH₂CH₂0)_x(CH(CH₃)CH₂0)_yH and x + y is less than or equal to thirty; and b) the polymer backbone is crosslinked with one of the following compounds: an alpha-omega diene whose structure is CH₂=CH (CH₂) _ZCH=CH₂ ; an alpha-omega diyne whose structure is CH-C (CH₂) _ZC^≡CH, and an alpha-omega ene-yne whose structure is CH₂=CH (CH₂) _zCCH, where z ranges from one to twenty.

Other preferred elastomers are the following: a composition as described just above wherein the elastomer is selected from the group consisting of : a silicone gel having a crosslinked polymer structure according to claim 1 with 20 mol% substitution of the group defined by R¹¹¹, wherein x = 6 and y =0; and a silicone gel having a crosslinked polymer structure according to claim 1 with 20 mol% substitution of the group defined by R¹¹¹, wherein x = 11 and y = 0.

Other preferred elastomers are the following: a Dow Corning 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%, e.g. 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 .

Other preferred elastomers are the following: an elastomeric resinous material which is a silicone polymer having a) a backbone with the following structure: R₃SiO (R^I ₂SiO) _m (R¹¹ R¹¹¹ SiO)_nSiR₃, where m is 1-250, n is 0-250, R, R¹, R¹¹ are alkyl groups containing 1-6 carbon atoms, and R¹¹¹ = CH₂CHCH₂0(CH₂CH₂0)_x(CH(CH₃)CH₂0)_yH and x + y is less than or equal to thirty; and b) the polymer backbone is crosslinked with one of the following compounds: an alpha-omega diene whose structure is CH₂=CH (CH₂) _ZCH=CH₂; an alpha-omega diyne whose structure is CH-C (CH₂) _ZC^≡CH, and an alpha-omega ene-yne whose structure is CH₂=CH (CH₂) _ZC-CH, where z ranges from one to twenty.

Other preferred elastomers are the following: a composition as described just above wherein the elastomer is selected from the group consisting of: a silicone gel having a cross- linked polymer structure according to claim 1 with 20 mol% substitution of the group defined by R¹¹¹, wherein x = 6 and y =0; and a silicone gel having a crosslinked polymer structure according to claim 1 with 20 mol% substitution of the group defined by R¹¹¹, wherein x = 11 and y = 0.

• A silicone gel having a crosslinked polymer structure as described above with 14 mol % substitution of the group defined by R¹¹¹, wherein x = 6 and y =0.

• A silicone gel having a crosslinked polymer structure as described above with 14 mol % substitution of the group defined by R¹¹¹, wherein x = 11 and y =0.

• A silicone gel having a crosslinked polymer structure as described above with 8 mol % substitution of the group defined by R¹¹¹, wherein x = 6 and y =0. • A silicone gel having a crosslinked polymer structure as described above with 8 mol % substitution of the group defined by R¹¹¹, wherein x = 11 and y =0.

A discussion of the use of silicone polymers as the materials that deposit swollen particles when dispersed in the compositions of the invention now follows. Preferred silicone polymers for use in the invention are polydiorganosiloxanes and polymonoorganosiloxanes . The polydisorganosiloxanes are preferably derived from suitable combinations of R₃SiO₀.₅ units and R₂SiO units. The polymonoorganosiloxanes are preferably derived from RιSiOι.₅. Each R independently represents an alkyl, alkenyl (e.g. vinyl), alkaryl, aralkyl, or aryl (e.g. phenyl) group. R is most preferably methyl .

The degree of cross-linking of silicone polymers affects their performance in the compositions of the invention. The preferred silicone polymers of the invention are 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 Corning 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 20%.

Elastomers impart a silky feel to the compositions of the invention.

Optional Ingredients

Other ingredients, conventional in the art of antiperspirant/deodorant sticks may be included in the stick compositions of the present invention. For example, 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 composition of the present invention include, but are not limited to, drying agents, like talc or DRY FLO (aluminum starch octenylsuccinate) ; preservatives; and dyes. Generally, such optional ingredients are present in a composition of the present invention in an amount of about 10% or less by weight. In addition, although the necessity of including an organoclay is virtually eliminated by the use of the new and improved suspending agent, an organoclay and be included in a composition of the present invention as an additional suspending agent in an amount of upto 20% by weight of the composition. An organoclay is especially helpful as an anti-caking agent to maintain a particulate topically-effective compound homogeneously dispersed throughout the composition. An exemplary organoclay is a quaternized three-layer clay exfoliated with a polar solvent, like a quaternized montmorillonite clay exfoliated with propylene carbonate.

Components in compositions of the invention can fall into the following weight ranges:

Compositions of the invention which further comprise a low melting point wax can have components in the following weight % ranges

Compositions of the invention which further comprise an elastomer can have components in the following weight % ranges

Compositions of the invention which further comprise a low melting point wax and an elastomer can have components in the following weight % ranges

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. Specific compositions of the invention which have been made have the following formulations:

Component B

Cyclopentasiloxane D5 51.2% 56.96 56.95 45.7

Dimethicone 350ct 8.0

Finsolv TN 8.0

PPG- 14 Butyl Ether 10.0 10.0

Microcrystalline Wax 3.0 3.5 3.5 3.0

SF Silicone Wax 1642 6.0

C18-C36 acid 3.5 3.5 triglycerides

Castor Wax MP80 2.0 5 0

Silicone Elastomer 8 0

AAZG 26.5 26.5 26.5 26 5

Silica 0.5 0.75 0.75 1 0

Fragrance 0.8 0.8 0.8 0 8 The following are further examples of compositions of the invention which have been made.

Formulation E:

The method for preparing formulation E above was as follows:

1) In a suitable vessel, items 1, 5, and 6 were combined with agitation. Then 7 was included with agitation until the resulting mixture was smooth.

2) The resulting batch was heated to about 190°F, and then waxes 2, 3, 4, and 12 were added and the temperature was maintained at about 190°F until all of the waxes were melted.

3) The batch was cooled to about 155°F to about 160°F with agitation and 8 and 9 were added with agitation, until the resulting mixture was smooth.

4) At 155°F, items 10 and 11 were added and the resulting batch was filled into suitable containers at 145 to about

150"F.

Formulation F:

Formulation G

Formulation H

FORMULATION I

FORMULATION J

FORMULATION K

FORMULATION L

As can be seen from the above examples, thickeners or other rheological additives, can be present in compositions of the invention at from about 1 to about 5%. Compositions of the invention are made using processes known in the art, or by using processes which are analogous to those known in the art .

Compositions of the invention can be prepared by methods which are known in the art or are analogous to methods which are known in the art .

The invention also relates to a method for treating or preventing perspiration or body odor which comprises contacting human skin with a composition of the invention.

As noted above, the compositions of the invention provide increased thermal stability without giving up the esthetics including "glide", payoff, color and odor.

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. In addition , compositions of the invention have excellent thermal stability at temperatures as high as about 115 to about 120°F. 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 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 .

Claims

Claims :

1. An antiperspirant composition which comprises:

(a) about 0.1 to about 10% of a high melting point wax; (b) about 5 to about 40% of a non-volatile, non-toxic emollient; and about 15 to about 50% of a particulate antiperspirant active.

2. A composition according to claim 1 characterised in that it further comprises about 0.1 to about 10% of a low melting point wax.

3. A composition according to claim 1 or 2 characterised in that it further comprises about 0.1 to about 15% of an elastomer.

4. A composition according to any preceding claim, characterised in that it is an antiperspirant/deodorant.

5. A composition according to any preceding claim, characterised in that it is a solid.

6. A composition according to any of claims 1 to 4, characterised in that it is a soft-solid.

7. A composition according to any preceding claim, characterised in that the high melting point wax melts between about 150 to about 215°F.

8. A composition according to any preceding claim, characterised in that the high melting point wax is selected from the group consisting of beeswax, spermaceti, carnauba, bayberry, candedilla, montan, ozokerite, ceresin, paraffin, synthetic wax, microcrystalline wax, and mixtures thereof.

9. A composition according to any preceding claim, characterised in that the high melting point wax is microcrystalline wax.

10. A composition according to any preceding claim, characterised in that the emollient is non-volatile and non- toxic, and is an organic emollient, a silicone based emollient, or mixtures thereof.

11. A composition according to any preceding claim, characterised in that the emollient is PPG- 14 Butyl ether.

12. A composition according to any preceding claim, characterised in that the particulate antiperspirant active is aluminum zirconium trichlorohydrex-Gly .

13. A composition according to any preceding claim, characterised in that it comprises:

14. A composition according to any of claims 1 to 12 characterised in that it comprises:

15. A composition according to any of claims 1 to 12 characterised in that it comprises :

16. A composition according to any of claims 1 to 12 characterised in that it comprises:

17. A method for treating or preventing perspiration or body odor which comprises contacting human skin with a composition according to any preceding claim.