CA1184122A - Anhydrous antiperspirant composition - Google Patents

Abstract

Abstract of the Disclosure A novel stable anhydrous paste or cream composition having superior ultadry characteristics when applied to the skin comprising an antiperspirant or deodorant agent and an oil absorbent material homogeneously dispersed in a vehicle comprising about 25 - 55 % of a volatile silicone and a clay suspending/thickening agent in the form of a gel, preferably a bentonite gel. Additionally preferable ingredients are stability agents to prevent syneresis (oil separation) such as the fatty acid metal salts, more specifically zinc, aluminum, calcium, magnesium, and lithium stearates.
Additional thickeners, binders, suspending agents, emollients and nonionic emulsifiers may be added as desired to further enhance the aesthetics of the cream product. The resultant dry-feel cream products spread easily, are not wet, oily or sticky, and vanish almost immediately on rub-in when applied to the skin.

Description

2~
The present invention relates to dry, stable, essentially anhydrous antiperspirant/deodorant creams comprising a volatile silicone vehicle, a clay suspending/thickening agent in the -form of a gel, and an oil absorbent material as the essential ingredients.
Slurries, pastes and creams are traditionally prepared as oil-in-water or water-in-oil emulsions. Antiperspirants prepared with these emul-sions go on the skin either wet or oily and are often sticky. They also require time to dry. Oil based liquid roll-ons on the other hand require shaking. They go on oily and also require time to dry.
Anhydrous antiperspirant compositions are known in the prior art and are described in United States Patent No. 3,873,686 wherein a liquid formulation, which may also be in the form of a cream and is preferably in the form of an aerosol, comprises an alcohol soluble aluminum chlorhydroxi-depolyol comple~ antiperspirant in an anhydrous ethanol vehicle; and in stick form as disclosed in United States Patent No. 4,137,306. Anhydrous liquid compositions having particular utility in pump-spray orroll-on formu-lations, wherein the antiperspirant agents are dissolved in a vehicle con-taining ethanol and a sufficient amount of volatile and/or non-volatile silicone liquids to reduce tackiness of the antiperspirant, is described in United States Patent Nos. 4,053,581, No. 4,065,564 and No. 4,073,880.
In an attempt to improve the drying properties of antiperspirant composi-tions, the Product Bulletin of Wickhen Products, Incorporated, received May 24, 1979, describes a roll-on suspension containing I

t ~n antiper~pirant agent in a vehicle comprising 69-77~ ~olatile I ~illcone, 2% eth~nol and 1~ water~
U~ K. Patent, Application GB 2018590A eli~inate~ the ! alcohol content from the roll-on or pump-~prAy an~ipersp1rant ¦¦ 3uspen~ion ~ehicle and ~ubstigutes a volatile cyclic ~llicone Il ln ~mounts of 60 9~~ in order to impro~o adherence of ~aid ¦¦ Qntiper~pirant to the axillae~ thereby lmproving e~ricacy, D~splte the in~lusion o~ suspending agents in the abovs formu-latlon, some shaking i~ nece~sary in order to redisper3e ¦¦~ettled a~tiper plrants riti~h patent~ NoO 1,48~,373, No. ï,501,862 and No~
li 2,003,730 di~¢lose a molsture-absorbent wat~r-in301llbl0 and/or ¦! water-~oluble polymerl, ~i.e., ~tarch) a~ a qub~titute for astringent antiperspirant compounds, in ~n alcohol vehicle, ¦ ~ld ~o~nulations bein~ in the ~olqn o~ roll-on lotions, ~pray-pump liquids or aer~sol spray~. ¦
I ~nother att~mpt to avoid gro;asy and t~cky ~ntiper~plr-ilant product~ re3ulted in ~olid ~kick ~ormulation~ containing ¦!antipersplrant powd0r (i.e., alumlnum ~alt~) suqp~nded in a solid v3hicls oompr~ing volatil~ ons~ and long chain al~ohols whlch may contain other powdered materi~s ~uch a~
talc, ~tareh, ¢lays, 30dium bicarbonate ~nd ~umed sllica, ~ ~ .

disclosed in United States Patent No. 4,126,679.
Although antiperspirant cream formulations are commonly manufactured as oil-in-water emulsions, anhydrous creams in the form of a thixotroplc gel is disclosed in United States Patent No. 4, 083,956, wherein a powdered astringent material is sus-pended in a liquid emollient such as mineral oils, or fatty acid and fa~ty alcohoi esters containing an inorganic clay thickening/
suspending agent, and a gel promoting agent such as Cl 5 alkanols or propylene carbonate. This cream is in the form of a gelled mixture.
Despite the many attempts to provide a dry cream product, there is no discloswre of an anhydrous paste or cream composition which is stable, i.e., resistant to syneresis and requires no shaking prior to use, is easily spreadable, is not wet, oily, sticky or greasy and vanishes almost instantly on rub-in, requiring essentially no drying time, comprising an anti-perspirant agent, an oil absorbent material, in a volatile non-polar vehicle such as volatile silicone and a clay suspending/
thickening agent in the Eorm of a bentonite gel.
The present invention is directed to overcoming existing disadvantages and difficulties by providing a novel stable antiperspirant~ deodorant cream or paste product which requires no shaking prior to use, the product being an anhydrous cream or paste product which requires essentially no drying time when applied to the skin.
Preferably the cream or paste is dry feel with improved aesthetics, i.e., is not wet, oily or sticky upon application to the skin and is capable of being readily and easily applied to the skin by simply spreading with a pad or fingers.
Still another preferred feature of instant invention is that the product is an efficacious antiperspirant/deodrant cream or paste formulation cosmetically acceptable for sale as consumer products.
According to the present invention; there is provided a stable essentially anhydrous cream composition comprising an antiperspirant and/or deodran~ active agent and an oil absorbent material homogeneously dispersed in a vehicle comprising about 25 - 55 % by weight of a volatile silicone and a clay suspending/
thickening agent in the form of a gel.

In another aspect, the invention provides a method of preparing the anhydrous cream hereinbefore defined, which method comprises mixing the clay gel suspending agent with the volatile silicone oil vehicle and heating to a temperauure of about 140 - 220F until a viscous solution is formed, sequentially mixing and blendi.ng the antiperspirant/deodorant powder and the oil absorbent powder with said viscous solution to form a stable viscous warm pourable mixture, homogenizing said warrn pourable mixture and cooling to form a homogeneous non-pourable cream.
More specifically, present invention preferably relates to stable, quick vanishi.ng/drying anhydrous antiperspirant/de-odorant compositions in the form of a cream or paste which is dry upon application to the skin and requires no shaking prior to use, and substantially no drying time, containing as the es-sential ingredients about 25 - 55 % of a volatile si.licone vehicle; at least 10 % and up to 50 % and preferably 15 - 30 %
by weight of an oil absorbent material selected from the group consisting of talc, starches, clay, microcrystalline cellulose and grain derived products and mixtures thereof; about 10 - 30 % anti-perspirant and/or deodorant agent; and about 1.0 - 20 % by weight of a clay suspending/thickening agent which is in the form of a gel; and preferably about 0.1 - 6 % by weight of a stearate salt.

l It has been ~ound that superlor antlper~pirant/deodor--¦ant products can be rormulated a9 pastes~ or oreams which require no shakin~ ~nd requlre e~sentially no drying time;
,Furthermore9 they vaniAh almo~t immedlately on rub-in ~nd have ¦~superior ultr~ dry characteri~tic~ without imparting an o~ly or ¦Igre~sy a~er-~0el to ~he sk~nO The u~er, there~ore, can dres~
` Qlmoqt immediately a~ter applying the product~ ~hese produots are e~entially anhydrous and contain volatlle or non~volatile, ¦¦non~polar vehlcles in comblnat~on with o~l ab~orbent matsrials.
Le~s 0119 are u~ed9 which when combined with oil abqorbent mater-¦ i~l9 mako ~or un~qu~ ultradry type antiper3pirant/deodorant .
Iproducts. m ickeners, binders ~nd ~uspsnding a8ents are use~ul ~in the rormulation~ to improva product aesthetlcs and productstabllity~ O~W e~ul~lr~er~ are al30 u~e~ul to improve the ri~se- ¦
lability o~ the produ~t~ ~rom the ~kin.
Acoordingly, an anhydrous antiper~pirant/deodorant ,crcam comprlsing an antiperspirQnt and/or deodorant agent dls-¦per~ed in the vQl~tile silicone vehicle cont~lnlng a clay jQuspendin~thickening agent and at lea~t one oil ab~orbent ~materlal or~er~ many ad~antage~ and are une~pe~tedly ~uperior to water--based antiperspir~nk/deodor~nt emul310ns, and superlor to oil-ba~ed liquid ro~l~on antlpersplrant~ and deodor~nt~
~sv1denGed by th nRture o~ tho 1rstQnt novel products whloh Qre ultradry, not wet~ oily or ~ticky ~nd rsquire es~entially no drying timeO In additiong instant novel cream3 are ~table~ i.e.
no settling out o~ antiperspirant or deodorank agent, hav~ a gsod ~helf li~e, ~ree o~ ~yneresi3, and require e3sentially no ~hakin~ prior to u~eO In~tant novel creamq are more apreadable and non-gre~y compared to antlper~pirant or deodorant ~tick3.
Unlike liquld roll-ons, they are not runny, wet or oily, but dry in use. InQtant no~el anhydrou~ crsam~ hava ellm~nated the multipls di~advantages of prior art ~ormulatlon~ and achieved an unexpectedly superior product both ~ to a~sthetics and gr~ectivene~
The vehi~le lnto wh$ch the antiper~pir~nt ~nd/or deodorant actlve ingredient i~ dl~per~edg 19 non-polar and i9 a volatile 3ilico~ ThiQ vehicle ~acilitates ths almost inst~ntaneou~ ab~orption o~ ~aid active ingredient into tha ~kin; eliminates the ~t~nging sensation attributable to ethanol which 19 a ~ommonly u~ed polar vehicle and ths wet *eeling o~
an aqueous vehicle. The ~olatile ~lllcone oils may be cy~
~ilicones rapre~ented b~ the ~ormula - ~R2~iO~ - wherein R 1~ Cl-C4 alkyl and n 1~ 3 to 10 p~e~erably ~rom 3 to 7~ and th~ un~atis~led valencie~ on the a~ygen and silicon atom3 at tho ends o~ the chain are ~olnad to one anothor to form a cyGlic struc~ure. Suit~ble volatile cy~lic ~ilicons~ are ~or e~a~pla~

1~41~

¦¦ (a) U.C.C~Y-7207*~old by U~ion Carblde Corporation in whlch I¦ each R i~ a methyl group and which typlcally comprlses~ by ¦I waight, 9904~ tetramer~ 0l6~ trimer and traces o~ the pentamer ~nd hex~mer~ ~b) ~W5~03314*(~old by ~WS Sillcones9 Q Dlvl~lon I¦ o~ Staurrer Chemlcal Company) in whlch R i~ a methyl group and il whlch 19 sub3tanti~11y ~11 tetr~mer9 and ~c) Dow Cornlng 344*
¦¦ fluid i~ which R lg a methyl group and which typioally comprise~g ¦ ~y w~igh~, about 8a~0 tetramer, abou~ 8~ p~ntamer and ~r~ce~
Ij o~ trimer ~nd hexRmer, and more ~p~eirically cyclomethicone, a cyclic dim~hy~ polysllo~Rne compound~ The Yolatile ~ilicone ~l oil may al90 be linear polydimathyl~iloxanea. Ths non-polar l vehlcle constltut~s about 25-55% and prefar~ble 30045~ by welght I
the compo~ltionD
¦ Th~ oil a~orbant material, an es~6ntlal ln~redient i~
Il in ln~tant anhydrous ~ormulation~ rlnaly divided powdar il ~olect~d rrom the group eon3isti~g Or talc ~ ~t~rche~ " cls.ys, microcry~talline cellulo~a g grain der~ved pvwder3 ~uch a~ ric~, and mixtures thereorO Thls oll absorbant powdsr inereases the density Or the cream produet " en~ances lts ~tability and d~ring propartla~ and provldes tha cream with a dry real upon applica-tion to the skirl, The oll ab~orbent rlller mAkes tha craam dry by absorblng the volatile slllcone and ~ ctlons a9 the *Trade mark _9_ 1~41~i~

drying medium 1~ thi~ 3y3tem. The ~ombination Or the oil abaorbent powder And the non-polar qllleone vehicle ~orms a non-~ticky .~lm on the ~in whlch ha3 a velvety ~mooth dry ~oelO
The oil absorbent particulate material con~titutes at least 10~ ~nd pre~arably 15-~0~ and up to 50% by waigh-t o~ the total eomposition~
The pre~ent crean ~ormulation~ assentially contain an antlperqpirant andfor a deodorant ackive material ln powdered ronm9 Any al-~nlnum or ziroonium astringent antiper~plrant ~alt or co~plex, well known in the art c~n ba employed, ~uch as ~lrconyl hydro~y h~lide~, basic aluminum halides, zir~onlum aluminurn glycina complex, aluminum chloride3, ~ blend o~
aluminum chloroh~drata, aluminum chlorlde and urea~ alumlnum ohlorhydro~ide-prGpylene glyeol comple~ (Rehydrol ~rom Rehei3 Chemical Co.), m~xtures thareof and the llkeO Any known deodorant active agent such a~ ~od~um blcarbonate~ zinc ricino-loate may ~l~o bs utllized per se or in con~lmction wlth the .
antiperspirant aot~ve component where com~atible. The amount of ~ctlv~ agen~ used ~hould be ~u~icient to prov~de sweat reductlon and/or deodorAnt properties to the compo~ition and may vary over a wlde range~ However9 amount~ of at least 5% ~nd pre~erably 20 to 30~ are pre~erredO
~Trad~ ~a~k Another essential ingredlent of the present anhydrous cream antlperspirant product is about 1.0-20~ by weieht of a clay suspendin~,/thickening agent in the form..of a gel, containing about 0~1-10~ clay, ~elled in a non-polar vehicle selected from ¦
Il the group consisting of volatile silicone, fatty esters (isopropy 1 myristate)~ volatile hydrocarbon~ fatty alcohols (isocetyl alcohol), ethoxylated and propoxylated fatty alcohols This clay I gel thickens the volatile silicone vehicle, enhances product il stability and prevents oil separation (syneresis). Said clay gels ¦¦ may be preformed in a non-polar vehicle in the presence o~ a ¦ wettin~ agent such as propylene carbonate and sub~ected to a hig~

i shearing action, such as an homogenizer at 5, ooo-6, ooo pslg prio to its addition to the volatile sillcone vehicle; or said gel may be formed in situ in said silicone vehicle from the gel-formlng i ingredi~nts (clay~ non-~polar vehicle and wetting agent) durlng i the process of ma~ing the cream product~ Suitable clay -thickerlin suspending agents include bentoni-te gels, hectorite gels and colloidal magnesium alumlnum silicate gels and hydrophobically tre~te~ bentolllte ~els avall~bl~ under the tr~cmark of "~3erltorle"
¦ which is prepared by reacting bentonite in a cation exchange system with an amine and forming a gel thereof in a non-polar vehicle such as ~soprop~l myristate, vola-tlle silicone and mix tures the eof. Different ~ -s are reacted to obtein s variety ll~l 112;~

Or ~enton~s whioh may al~o d1rr~r ln proport1ons Or S10z, MgO
and A1203. speciric e~ample3 within tha scope o~ the preso~t inverltion are Bentone*3~, Bentone* 3l~S, Benton9k 27, and Bentone 14, all o~ whleh have a particle ~lze below about 5 microns and are c~mmeroially availabla ~rom the N L Indu~tries, Inc~ Bentoné* 38, a Quaternary Ammonium H0ctorite clayg lq the most pre~erred su~pending/thickenin6 agent.
Minor amounts Or ~umed ~llica ~Cab-0-Sil rrom tho Cabot Corp~) is an additlonally suit~ble suspending agent which may be used in conJunction with aforesaid clay suspending aKent.
Th~ ~um~d sili~ aids in ab~orbing the sllicone oll and in pre-venting ~yneresisO However, the U~9 0~ ~umad 9ilica a9 the ~ole thickening ~gent yields an unqtable product whereln the oil s~parate~ outO
Minor amounts o~ about 005-10~ b~ weight o~ higher ~atty acid amides may be additionally used either slngly or in combination as oil absorblng binding and thickelling agents.
SuitAble amides ~nclude stearoyl monoethanolamlde, OoGomono-ethanolamide and tha like.
~ Tonionlc emulsl~ier~ are an optionally pre~erred lngredient in instant ¢omposition because it provide~ enhanc0d rin~eab~ lity o~ the antiperspir~t ~ilm ~rom th~ body 5ui~able nonionic en~ul3$rylng agents includ~ ~lkoxylated, such as I .
*Trade mark Il I ethoxylated and propoxylatedg fatty ethers and alcohol~ ~uch as Polyoxyethylene (20) iso-hexadecyl ether, Polyoxyethylene (100) Stearyl alcohol, Polyoxypropylene (15) Stearyl ether, etcO and mixture3 thereor~ Amounts o~ 0.1-5~ b~ wsigh~ may be us0do Another optionally prererred ingredlant i3 a rat~y ~cid metal ~alt which functions a~ a sta~llity agant to prevent ¦~yneresis~ Suitable metal salt~ include zinc, aluminum, llthlum, ¦~alcium and magnesium 3alts o~ C12~C22 ~aturated and unsaturated ¦~atty acld3. Typical ratty acid 3alt~ include myristate3~ pAlmi-¦¦tate~, stearates, etcO in amount3 of 001~6~ by welght.
Xn addition to the es~ential ingredientq of the presant ~compo3ition, one may al30 lnclude therein minor amounts of com ¦Iponent~s such as perrumes, coloring agents~ whltening agents auch ~s titanium dioxide9 Antioxidants, ultraviolet ab~orbsr3 to enhanco the color and the like, ~o as to improve the ae~thetlc value and csn~umer acceptabillty. Minor amounts of othar ingredl- ¦
ents which do not ad~ersaly a~rec~ the beneflcial propertie~ of instant composition may also be includod.
Minor amount~ of ~molllent~ 3uch QS fatty esters, I
~atty Alcohols9 mineral oil~ polyether ~iloxan~ copolymer may al~o ba included in pre~ent novel cream~ to provide lubricit~ to l the ~inal product~ ExQmple~ Or emolllents include isopropyl ~yristate, i~opropyl p~lmit~te, cetyl acetate, cetyl propion~ta, d1isopropy1 ~dipate, PP0-15 stsary1 sthsr, ~tc. SPld smol1isnts ¦! may be solld ~axe~ or liquid oils~
The anhydrous cream ~ormulatlona o~ present invention l are used in the same manner as any conventional antiporspirant ! composition to inhiblt axillary perspiration~ The present compoqition can be ea311y rubbed into the 3kln leaving a dry, ¦non-3ticky, non-oily, non-graa~y~ non-stinging, smooth vanishin~
¦jrilm on the ~kin~ The present crea~ compositions can be ea~ily applied by any suitable means including the use o~ ~ingers, pads, or sheets Or variou~ ~ub3trates, brushJ daubers and convenient cre~m dispanser~ known by those in the art; and can be packaged in any suitable container including ~ars, packet~, tubes, bottle3,i and extruding devices~ known in th~ pr~or art.
: The method o~ making the ~tabla anhy~rous cream com-po~ition~ o~ instant invention generally comprise~ mixing a clay ¦¦suqpending ~gent which i~ in the ~orm Or a gel wlth the ~ilicone ~oil vehicl~ until a viscous 301ution i8 ~ormed~ sequ~ntially ¦blending and mixi~g ~he antiper~pir~nt ~nd/or d~odorant powder and th~ oil ab30rbent particulate materlal with ~ald ~iscous 1 solution to ~orm a ~table cream product. More speci~ically ¦¦a bentonite gel, a pre~errad su~pending/thickoning agent, i~
¦l ~ormed by mixing a non-polar ~ehlcle or comblnation such as opropyl myristats a?nd volat:ll0 sllloone~ with Bentone and a .

~1 ll 118~L1Z;Z

wettlng agent 3uch a~ propylene carbonate and homogenizing said mi~ture to ~orm a gel~ Thickening o~ the vol~ti.le ~ilicone can l90 be achieved during the batch maklng proc~ure using part or ~ull formula amounts o~ the non-polar vehicle or v~hicle~, Bentone, wetting agent, and homogenizlng the mixture9 th0reby ~orming the bentonike gel in situ and imparting thickening properties to the volatile silicone vehicle. A benton~te gel may al90 be purcha~ed a~ a proprietary product. Said bentonite gel ~u~pending ~gont and the ~licone oil are mixed and heated to a temperature within ths range o~ about 140-220F until ~
solution t~ formedg qequentlally mixing and blend~ng the ~ntiperspir~nt powder ~nd the oil ab~orbent powder with 3aid vl~cou~ solutlon to rorm a ~tablo visoow mi~ture whlch may be homogenized in a ~arm pourabls ~tak0 to e~fect a homogen~ou~
non-pourable cream on cooling, ~ddlt~onal su~pending agent~, thi~kenlng Qgonts, ~tability agent3 and nonionlc emulsiflers may be melted ~nd preblanded wlth the oll absorbent powder or the ~ntiper~pirant powder prlor to their addition to ~aid viscou~
non-polar ~illeone o~l Yehicle~ or may be prebl0nded ~nd added independently to said viscous vehi¢le or melted and added ~epa-rately to said vi~cou3 vehiols. Per~me ~nd colorant~ are added to the Vi~CVU9 mixturs a~ter cooling to be~woen llO and 150P. It 19 ~ rei`er~b1~ to ho~ogen1zo the r1na1 mixture to l 1.

--~5 e~ect e h~mo~eneous cree~n produoO Or the doalred viaco~lty whloh a non-pourable consi3tency~ The fln~l product may ha~e ¦ a non-pourable consi~tency at ambient temperature0a heavy cream cen~istency or a thick pa~te conslstency~
Detailad Descr~E~ or t e Invention I¦ The ~ollowing spec~lc examples are ~urther illustrative lo~ ths present inv~ntion9 but lt i9 understood that the invention .1is not limited thereto. All amount~ Or various ingrediant,~ ara by weight unless otherwise ~peci~iad.
EX~MPLE 1 I¦ In~redient ¦¦Bentone*Gel "A" lloaO6 I¦Lithium Stearate 0.800 ¦¦Antiper~pirant Powder (1~ 20.000 I'Volatlla Silicone t2~ 4~0394 ¦~Talcu~ powder 25~000 ¦Atl~s G3758 (3) 2~000 jjBentone*Gel "A"
In~redient I~opropyl Myr~state 84.706 I ~entonek38 (4) 110765 ¦Propylen~ Carbonate 30529 ~Trede mark Il I

ll -16 2~

¦ ~1) Spray Dried blend Or ~0 parts alum~num chlorohydrate 10 parts Aluminum Chloride 5 parts UreaO

~¦ (2) Cyclomethicone a cyclio dimethyl poly~iloxane compound D.C. 344 Fluid9 F222 Siloxane-S'~JS.
I
(3 3 Polyoxyethylene (100) Stearyl alcohol - ICI.

(4) Q~aternium amrnonium Hectorite clay -NL Industrles.
I
Prooedure ~or Bentone Gel "A"
. .. .

Bentone*38 i~ mixed wtth Isoprop~l ~yri~tata and ' Propylene Carbon~te i9 added. The mistkure i~ passed through Il a Slngle Stage Manton Gaulin homogenizer at 59000-6,000 piig9 ¦¦ ~ very thick non-pour~hle gel i9 obtalnedO

, ~Trade m.~lrk 1, 1 i Prooedur~ ..
1I Lithium Stearate 1~ mixed wlth Benton~* Gel "A" ~d ¦Iheated hot to form Q thick pa~te. The mixture i8 cooled to Il about 140F ~nd Volatile Silicon~ t~ 140F) î~ added ~rld mlxed ¦¦ to ~orm a vi~cou i ~olutlenO Atla~ G'3758 i~ melted Qnd addedO
Talcum Powder and an~îpersplra~k powdersi are blended in wi~h ¦ mixing9 and the mi~ture î~ homog~nized,. ~ viscous cre~
product i9 ~on~ed,, Thé above product when appli~d to the sk~n has a 3mooth j ¦¦ dry ~e~l (non-oily" non-sticky) with excellent aesthetic prop~ j ¦l erties.

I l EXAMPL~ 2 ,1~ ~. I
~alcum powder 2500 Bentone~` Gel 'IA'l o~ ExAmple 1 1500 I Volatile Sllicone Or E~cample 1 32.5 ¦ Cab-0-Sil* (5) 1~,0 Anti p~r~plrant Powdar o~ E~ample 1 20. 0 l Wltcamidc*70 (6) 200 ¦ Atla~i* G3758 o~ E~ample 1 2.0 ¦ Arl~mol E (7 ) 2.,0 ¦Per~ne 0~5 *Trade mark !
ll i Z;~

(5) ~umed Sillca - Cabot Corporatlon.
(6) Ste~royl Monoethamolamlde - Witco.
(7~ Polyo~ypropylene (15) Stearyl ether - ICI

Prooedure , The Bentone*Gel is di~persed in ~olatile Silicone.
Cab-0-Si~ ls admixed follol~ed b~ antiperspirant powder and talcum powder. Atlas G3758, Witcamid0*70 and Arlamol E is combined~ melted and mixed separately then added to the mixture.
Perrume i~ added. ~ pasto-type Rntiperspirant craam produc~
formed, havin~ a light eream co~istenoy~ ¦
The abovo product i~ dry (not oily or sticky) when applied to the skin with exceptional ae~thetic propertia~ has a ~elvety qmooth reel and rorm.~ a non ~ticky rilm on the ~kinO
Thi9 product 3howed no llquid 3epar~tion (~ynore~
after a predetermined aglng pariod at 110F and 40F.

P~MP~ES ~ and 4 Exam~
Part A
____~
Bentone Gel "A'7 15.0 4~o Vol~til~ Silicone (2~ 3600 42.0 i1 *TradeInark ~1 1 Il I

lZZ

~ ~ ~L
Part B
¦ Antip~r~plrant Powder (1) 20~,0 20.0 i¦ Arla301ve-~00 (polyoxyethylene (20~ 2.0 2.0 ohe~ade~yl ( ether ) Part C
l __ Talc 22.0 ! Dr~rlo StOErch ~Al Starch) oct0nyl - 2500 Il * suoclnate i! Cab-O~S11 M-5 1.0 2.0 Witcamlde 70 (6) 1~0 1.5 ~ Cooomonocthnnol~m1de 2.0 3.0 ¦ Part D
Color/Per~o q- 9 (~,~ 3 !I Part A 1~ m~ad and heated to 160~F, Part B ingradi-~nt~ ara added to Part A and mix~dQ Part C i~ preblended and added ~o Part~ A a~d B. The mlxture ;1~ c~oled to about 110~ ¦
and per~u3ne ~d olor i~ added,. The m1~cture i~ homvg~nized.

~ *Trade mark . I, - ~0-1 2;~

E~ar~le~ 3 and 4 are dry (not oily or stick~) when applied to the sl~in ~ith ex~ellent ae~thet~c properties. Ea~- ¦
ample 4 with Dry~lo*Starch iA~ white 13l appear~nce wherea~ 3 ha~ A grayi~h eolor.

.1 . ~
I I In~;radlent ~_ ,¦ Bsntone*Gel ~rom N~ Indu~trles) 15.0 ~made with volatil~ ~ilicone and $sopropyl ~¦ mYri8t~te ) I Vol~til0 Sllicona (SWS 03314) 33.8 ¦~ Silicone Copolymsr (pol~ether silo~cQne 3 û
oopolymer ) Aluminwn/æirconium Tr$chloro~ydre;lc powder 20.0 (aluminuxn chlorohydroxide ~ zirconlum I Ghlor~rdro~cid0 and glyo1ne oompI~ac) I It~ n Talo 28.0 I Perrumn 0~ 2 ll The siliGone aopolymer i~ dl~solvod ln ho~ vol~tlle silic3ne And the Bsntone gel 19 added with ~xlng to form a . vi8cou3 901ution,, The al~nin~n-zlrconium comple~ dmlxed, l ~ollowed b sr the talc and lihe~ the per~ume and the total mlxtllre ¦ i~ homog~nlzed and cool0d~
ll *Tr~,de n)~rk Th~ s product has a soft texture and an e~ccellent feel ~¦ when applled to the ~kln9 and a~hibits no oil sep~ration after a predet3rmined aglng period at 120Fo ', EXAMPLE 6 ! In~redient ;

Bentone*Gel (~rom NL Indu~trie~) 5~0 Volatlle Silicone (SW~ 03314*) 36.8 ¦ Alumin~un/Z;lrconium Trichlorohydrex 20.0 , ¦ powder l¦ Perrume 0.2 ~¦ Stearyl alcohol 8eO
¦ Montana talc 2500 Polyoxyethylene (100) Stearyl alcohol 3.0 Polyethoxylated ~16.5) i30hexadecyl 4~0 ether (emulsi~ier~

~¦ This compo~ition i9 prepared ln accordance wlth the procedure o~ Example 5O
il This antipersplran~ i~ in ths ~orm o~ a thick p~S~e9 li ha~ a ve~y ~irm texture and good drying propert~e~ and 1~ ~able,¦
i. 0~ 9 exhibits no 9~1era9i8 a~ter a predetermined aging period ~t 1~0F
!
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l! l ¦ EXAMPLE 7 I In~redient Volat~le silicone (Si~S 03314) 39.5 ¦ Bentone*gel (NL Indu~trle~) 800 ¦ Zinc ~tearate 2~5 Mont~na Talc 25.0 I Alwminum chlorohydrex P~G9 20~0 (a propylene glycol comple~) Silicone copolymer 5Oo Thi~ product i~ prepared in accordance with the pro- .

~edure o~ Example 6.

Thiq product ~howed no liquid qeparation a~ter a predetermined ~ging psriod at 120F.
1~
!! EXAMPLE B
¦' Vol~tile ~ilicone DC 3449 which i~ s volatile than S'~S 033149 wa~ ~ub3tituted for SWS 0331~ in Example 7. The ~olatlle ~ilicone, bentone gel9 zlnc ~te~rate and ~ilicone co-polymer wers mixed at a temperature o~ 220F ~nd cooled to 160F

~or the addition Or the astrin~ent powder and further cool~d to 115F ror the addition of the talc.
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The raault~nt product i~ a thick pasts with excell~nt ~tability propert1es.
Tha be~t stability properties are obtalned u9ing ,1 I'ox~nulas containing the silico~e ~opolymer and the Qluminum j chl~rohydrex P,G. a~trin~ent, I

Part A
, ._ Bentone gel (Rppro~cO .12,~) 400 Volatile Silicone 4200 I l Part B
¦I Talc 2000 li ~ntiparsp~rRnt Powder (l) 20.0 j; Cocomsthanolamide 60 0 Il Stee~roylmethatlol~mids 6.0 i Polyo~cyethylene (20 ) ~sohexadecyl ether lv5 Part C
__ Per~ 0.~

Il ~24 Bentone gel and volatile sllicone ara mixed wi~h ¦ lighterling ~tlrrer at med0rate spee~ and hea~ed ~o 165-170~.
Ihe remaining ingredients o~ Part B are add0d with zni;cing urltil ¦ a ~ coU~ ~nd homogeneous mixturs ~ s f'o~nedJ which is coeled while stlll mlxing and the perrume 1~ added~, The color o~ the r~sultant cream i~ d~rk. Aging ¦ re~ult~ at 120F a~ter 4 days showed no ~epar~tion, or bleeding, I lndicatin~ a ~tabl~ produot,, EXI~IPLE 10 l:xample 9 was rapeated e:~¢ept that 1~ TiO2 wa~ added arld the Talc coD~nt was rsduced to 197~, yielding a wh~ ter ¦¦ produe~ than the ~orm~ tlon o~ ~cample 9~

~3X~IPL13 11 I3x~mple 10 was repsated excep~ that the T102 content WQ.3 lncr~a~ed to 105~ the ~thoxylated i~ohexads~yl ether eon-tent was i~ere~ed to 2.55~ and 0.5g~ color solutlon (a blua9 yellow and grQ0n combination 3, s7as addad and the t~le and sili~one content were ~a~h re~u~ed 1,~ to lB~ and 41~ re~pect~
i~lyO

11~41Z~

il The r~sul~ant product wa a cream wlth good aesthfltlc~
¦ and aa~ibited good rinseability.
Il I

l Example l~ ~ ~ repeated eacoopt that 25;~ rice powder s ~ub3tituted ~or the starch ingredientO The resultant product is a uni~orm brown mix~ure~, It has some dra~ ~9 comp~red to compositions contain~ng starch or t~lc ~ the oil ~bsorbent ~iller7 but po~seqse~ good rub ou~ ch~racteri~ticq and 1~ ~table ~ hown by no ~eparation a~ter aeing ~or 2 weeks at room mperaturo and 120~"
Il !
l ~ , l p; edien~
Cyclom0thicone (volatile silicone rrOm 4o6 SWS Sllicone~ ) Dry~lo tarch ( Al At~rch ) octenyl 25 . O
! ~uccinate Aluminum-Zirconlum l;rl¢hlorohydre~ 20~, 0 powder Co~omethanelamide 3 ,, O
Pelyethoxy ~ 20 3 i~o~heacadecyl ethar 2b 0 Ste~roylmeth~nolamide 105 Zn¢ Ste~ra~e 195 : : I

l ~26~ !

In~redicnt Bonton~ el (3.1~ isopropyl myriatate~ 400 0.4~ Benton~ 3~, 0~14~ propylene carbonate) Cab-O~S11 2a 0 Perrum0 o.4 l Thi~ product was prepared by mixing the bentone gel l ~he sillcone, ths ethoxylated ether, both amide compound~ and the zinc ~tearate while heatine thls mixture to 190-220 F until melted and a unirorm vl~cou~ mixtura i obtainedO A mixture o~
! the deodorant powder, the starch and the Cab-0-Sil ars added to the ~lscous mixture at a temperature of 160-170F with mlxlng~
e perruma i~ admixed thersw~th at 160~F and the ~inal mlxture homogenlzad.
Thi9 cream ~preads easlly and vanishes on l~b-in, lmparting a non-oily9 non gr0a~y, ultradry ~eel to the ~kin~
¦¦ The produc~ showed no liquid separation (~yneresi~) arter aging

3 months At temperature~ ranging betwaen 0-120F.

! EX~IPLE
Example 13 wa~ repsat0d using ~ 50:50 blend o~ tal~
and dry~lo ~tarch in lieu o~ khe 25~ ~tar¢h ingredient~ -The ~lnal ¢reMm i9 stablé and also exhiblte a good~s~ooth, dry re01 upon ~ppLic~tion ~o the ~kln.

O.~hor,~olatile sillcones and mixtures o~ Yelatlle sili¢on,é3.,m~,'.be.sub3tltuted.as,.the'non~pol~r vehicle ~or the partlculQ` ~ !hicone~ hé~ 0~2 ~ e~.,., S llarly9 other oil ab~orbing ~il'l'srs'''~nd mix~és Or ~illers can be sub~qtituted ~or ~he talcJ dry-rlo starch or rice ~lour in the above exa~ple3.
Likawise o~her ant.ipersplran~ and/or deodor~nt powdsr3 and mixtures thereo~ G~n be substituted ~or the partloulsr active agents u~ed in the e~mples. .~ny.~othor bentonitG gel can be ~ubstituted ror the ~peclri¢' Bentone eels utllized ln the e~a~ple~. S~milarly, other qw p~ndine agsnts~ stabilizlng agents, ~hick~ner~ bind~r~ and nonlo~io emul~ rs may be ~ub~tituted ~or the spe~lri~ agonts u,ed ~n the example~ ~ a mean~ of obtain~ng cream~ o~ the desired cvn~stency and ae~thatlc propert~e~0 The ~nhydrous ~n~ipersplrant cre~s of preseat lnventlQn ~hlch ~omprlse ~n a~tip~r~plrant and/or deodorang powder a~d an o~l ~b~orbin~ ~illar homogeneou~ly dlspersed ln a ~olatile.~ilicone ~eh~cl0~comprisi~g a bento~ite g~l B3 tho essantial ~u~pending age~t eæhibik uni~u~ and ~uparlor proper~
tie~ ~u¢h às ultr~dry charaatffri~tic~,bQth a~ to re~l.a~d r~qulra sub~tant~ally no'~rylng time9 ~babLlitg upon ~l~g as ~2B
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. well a~ requlre no ~haking prior to u~e, deliv~rs a smooth ¦¦ ooating ~o ~he 3kin which i~ readily rin~eable theref'rom~
It 1~ under~tood that the foregolng deta~ led descr~p-I tlon i~ gl~ren merely by way o~ illu3tr~tion and that lrariatlon~
il may be m~de therein without departing rrom the ~pirit of the vention, The "Abstract" given above is merely for the con-¦ venienca o~ technic~l searchers and i~ not to be given any w~ilght wi~h rospeot to the soope Or tho ln~ entlon.

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~29~ `

Claims (12)

CLAIMS:

1. A stable essentially anhydrous cream composition comprising an antiperspirant and/or deodorant active agent and an oil absorbent material homogeneously dispersed in a vehicle compris-ing about 25-55% by weight or a volatile silicone and a clay suspending/thickening agent in the form of a gel.

2. The anhydrous cream according to Claim 1, wherein the oil absorbent material constitutes about 10-50% by weight of the composition and is selected from the group consisting of talc, starches, clay, microcrystalline cellulose and grain derived products, and mixtures thereof.

3. The anhydrous cream according to Claim 2, wherein the antiperspirant and/or deodorant agent is in powdered form and constitutes about 10-30% by weight of the composition.

4. The cream according to Claim 3, wherein the clay suspending/
thickening agent in the form of a gel constitutes about 1-20%
by weight of the composition, said gel containing about 0.1-10%
clay, gelled in a non-polar vehicle.

5. The cream according to Claim 4, which additionally contains about 0.1-6% of a fatty acid metal salt selected from the group consisting of zinc, aluminum, lithium, calcium and magnesium salts of C12-C22 saturated and unsaturated fatty acids.

6. The anhydrous cream according to Claim 4, wherein the antiperspirant agent is selected from the group consisting of aluminum and zirconium salts or complexes and mixtures thereof.

7. The cream according to Claim 4, wherein the gel is a bentonite gel and the non-polar vehicle is selected from the group consisting of fatty esters, volatile silicone, volatile hydrocarbon, fatty alcohols, ethoxylated and propoxylated fatty alcohols and mixtures thereof.

8. The cream according to Claim 7, which additionally contains about 0.1-5% by weight of a nonionic emulsifier selected from the group consisting of alkoxylated fatty ethers and alcohols.

9. The cream according to Claim 6, wherein the antiperspirant agent is aluminum chlorohydroxide plus zirconium hydroxychloride and glycine complex, the volatile silicone is cyclomethicone, and the oil absorbent material is starch.

10. The cream according to Claim 5, which additionally contains about 0.5-10% by weight of at least one higher fatty acid amide.

11. The method of preparing the anhydrous cream defined in Claim 1, which comprises mixing the clay gel suspending agent with the volatile silicone oil vehicle and heating to a temper-ature of about 140-220°F until a viscous solution is formed, sequentially mixing and blending the antiperspirant/deodorant powder and the oil absorbent powder with said viscous solution to form a stable viscous warm pourable mixture, homogenizing said warm pourable mixture and cooling to form a homogeneous non-pourable cream.

12. The method according to Claim 11, wherein the clay gel is formed in situ from clay, non-polar vehicle and wetting agent after homogenizing the mixture in the silicone vehicle.