Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
J . 3 19/50/5~L
7'~
rl'he p:resent invention relates to ski.ll compositions and
ore particularly to licluid antiperspirant compositions which
are particlllarly sui-table for applica-tion -to the skin from a
pump spray or roll-on applicator.
Antiperspirant compositions have been manuIactured in
varying forms and such products as creams, lo-tions, roll-ons,
gel stichs, and aqueous solutions to be applied by a pad, have
been knowrl for many years, for example, a liquid an-tiperspirant
co~position is disclosed in US Patent 2,955,983.
In more recent years a more convenient form of
application of an antiperspirant has been developed. ~his is
a pressurised antiperspirant system where the product is
dispensed as a fine spray, as exempli~ied in US Patent
3,798,317. Several additional patents of interes-t in the
antiperspirant art are as follo~s: 2,955,983; 3,359,169;
3,420,932; 3,509,253; 3,8i6,613; 3,863,005 and 3,873,686.
Basically, the form o~ these aerosol products has developed as
either a composition having an antiperspirant active agent
suspended as a dry impalpable powder in a non-aqueous carrier
vehicle or as a composition in which the active antiperspirant
agent is dissolved in an alcoholic medium. Both of these
compositions are dispensed from an aerosol container through a
valve by the action of a propellant. ~he suspension of
impalpable powder has achieved much greater use than the
solution. One reason for this is that the suspension has
proved to be much less corrosive to appropriately constructed
cans. It is more important to consumer acceptance, however,
- 2 /--- ~
- -
.
.,
~0~7~9 J.3~9/50/~1
that the plodllct rrom the suspellsion in the propellant as it
reaches th~ skill is in a 1orm which contains little volatile
material alld ~herefore feels dry, co~l~or-table, non-tacky and
s~oo-tll. Alcoholic sy~tems utilising a solution rather tban a
suspension feel smooth and non-tacky when dry but are deposited
in a l~e-t tacky state. None-theless, -the latter products, ie
the alcoholic systems utilising a solution, enjoy a significant
degree of consumer acceptance in the marketplace.
A major problem of aerosols in general, and of suspension
products in par-ticular, has been that as applied they cause a
strong dusting and billowing of the spray, especially when the
amount of liquid carrier vehicle is reduced in order -to minimise
clothing staining potential of the formulation. In some
instances, this dusting can be unpleasant to the user o~ the
product and at best makes for less efficacious application of
the product than is desirable.
Roll-on antiperspirants while not having some of the
problems of pressurised aerosol sprays do, however, have their
own specific drawbacks. These drawbac~s are usually esthetic.
In other words, a roll-on antiperspirant will normally be used
by only one person because it comes in contact with the underarm
and multiple usership is not desirable either esthetically or
hygienically. Roll-on antiperspirants usually comprise an
aqueous-alcoholic solution of aluminium chlorhydroxide.
Frequently these solutions during drying are very tacky to the
touch. Also, the product takes a relatively long time to dry,
and may leave an oily residue on the skin due to the oily
- 3 - /---
,
,3~,3~/50/51
teric~ ric~ t) re~ ired -to ensure l'ree functioning o~ -the
roll ball. Addi-tionally, this lubricant also acts as an
elllollient .
Becallse there are many problems related to aerosol
antiperspira]l-ts, it beco~es advantageous -to investigate other
ulethods of applving antiperspirant compositions ~hich eliminate
a propellant system and additionally eliminate the billowing
problem which is atten~ant on the use o~ the finely divided
aerosol pressurised sprays.
Accordillgly, it is an object of the prevent invention to
provide an antiperspirant composition suitable for applying to
the skin from a pump spray or roll-on applicator which
composition is relatively non-tacky during drying.
According to the invention there is provided an
antiperspirant composi-tion suitable for applying to the skin
from a pump spray applicator or a roll-on applicator
consisting of a liquid medium comprising
A. 40 to 85% by weight of the composition of an alcohol;
B. 5 to 25% by weight of the composition of an alcohol
soluble aluminium chlorhydroxide complex dissolved in
said alcohol; and
C. a siloxane dissolved in the composition comprising
,s~
(a) 0.~ to ~0% by weight of the composition of a
cyclic polydimethylsiloxane of the structural
formula:
, / ~
J.3q9/5~/51
2~Lg
3 \ / CEI3
Si \
3 \ / ~ , ~ 3
C~[ / \ Si~ / \C~
CH~ CH3
or (b) 1 to 10% by weight of the composition of a non-
volatile polyphenylmethylsiloxane or a poly higher
alkyl siloxane wherein each alkyl group contains at
least three carbon atoms.
Preferred composi-tions of the invention are those containing
the cyclic polydimethylsiloxane since an additional bene~it
imparted by this material is tha-t it gives the perception of
quick drying. In such preferred compositions it is advantageous
to include fro~ 0.5 -to 10% by~weight of the antiperspirant
composition a polyalkylsiloxane, polyalkylarylsiloxane or
polyethersiloxane copolymer. Such an addition provides
lubricity to the formulation and acts to inhibit malfunctioning
of a pump spray or roll-on applicator.
The compositions of this invention are highly effective in
adhering to the skin and in reducing or substantiaIly
eliminating the problems of antiperspirants dispensed in
powdered forms, namely dusting and lack of good adhesion to -the
skin. Additionally, these compositions provide the advantage
of substantially reducing the tackiness of aIcohol solu-tions of
the aluminium complexes.
.~ _ 5 _ /
1~7Z~9 J 3~9/50/51
The alco~L soluble aluminiu~n chlorhydrox-ide complex which
is employecl in the an-tiperspirant composi-tion of this invention
is preferably a 1,2-prop~lene glycol complex of aluminium
chlorhydroxide. The preparation of this complex is described
in US Patent 3,420,932. The preferred 1,2-propylene glycol
derivative as described in the above-mentioIled patent having
~H2)O.7~ (OH)l 9-5 l(C]')O 1 1 1(l~2-propylene
glycol)O 7 1 3 is marketed as a powder under the Reheis Chemical
Company trademark "Rehydrol". Other alcohol soluble forms of
aluminium chlorhydroxide may also be u-tilised. The amount of
the complex preferably employed is from about 10% to about 20%
by weight.
The compositions of the invention are preferably
essentially anhydrous, ie contain no water added as such.
However, a minor proportion of water may be tolerated insofar
as it still allows the aluminium chlorhydroxide complex and
silo~ane to remain in solution or otherwise does not adversely
affect the stability of the composition. It has the
disadvantage, however, of slowing the rate of drying of the
product. '~herefore, the composition should be substantially
anhydrous, ie contain not more than 20% by weight of water
and preferably not more than 5/0 by weight.
'rhe alcohol used is preferably essentially anhydrous
ethanol and denatured ethanol meeting this criteria, which is
2a also cosmetically acceptable is, of course, appropriate.
Other short chain cosmetically acceptable alcohols such as for
example isopropanol may also be utilised but the characteristic
- 6 - /
~7~ J 3~/50/~1
odollr m~llces tbese other alcohols Less deslrable. The amount
of aL(o~lol leqLIirccl is fl~om about ~0 -to about ~,5/0 by weigh-t of
the -total ~on1position, pr~ferably from about 60 to 80% by weight.
The lower lilDit is dic-tated by the requirement of solubility of
the other colllponents of the Illixture. If less -than about ~0%
is used, difficulty is encountered in dissolving the other
componellts and in attaining a solution of the proper flow
characteristics for pump spray or roll-ball action. If more
than about 85% is us ed, the amount of the other components is
too low to effec-tively perform their functions. 65 to 80%
represents the most preferable range to achieve good solubility
together with acceptable efficacy.
The antiperspirant composition of the invention
preferably has incorporated therein a gel inhibitor in an
15 amount sufficient to substantially reduce gelling thereof upon
extended ageing, especially at elevated tempera-ture. Suitable
gelling agents for alcoholic solutions of alcohol soluble
complexes of aluminium chlorhydroxide are known to those in the
art. Triple pressed stearic acid, which is a combination of
about 50% by weight stearic acid with about 50% by weight
myristic acid, has been found to be preferable to satisfactorily
inhibit gelling of the composition. Other suitable inhibitors
include isostearic acid, propylene glycol, oleyl alcohol,
he~adecyl alcohol, oleyl ether phosphate, and the like and
combinations and mixtures thereof. The amount of the anti-
gelling agent when used is desirably from about 0.5% by weight
to about 5% by weight of the total composition and preferably
_ 7 _ /
~7~9 J.3~9/50/51
from a~ou-t 1% to about 3.50~b, l~tlich a~ount is par-ticularly
effective -to achieve ~ free flowing composi-tion.
Op~ional antiperspirant agents in amounts up to 10/S by
weight of the composition that may be included in the
composition are aluminium chloride, zirconyl oxychloride and
basic aluminium bromide as well as other agents known in the
art, see for example US Patent 29906,668. The use of these
agents will, of course, depend on their compatibility in the
system, which compatibility can be evaluated by simple
empirical methods.
Adjuvants that may be used are emollients such as
isopropyl myris-tate, propylene glycol monoisostearate,
isopropyl palmitate, ethoxylated lanolin, and the like.
Perfume is also optionally added. These adjuvants must be
compatible with the other components of the system and must
not leave a residue which substantially interferes with
efficacy. Generally, these adjuvants or additives, when
present, are included in an amount up to about 10% by weight
of the composition.
The cyclic polydimethylsiloxane of the formula
S i
CH3~ \ / \ / CH3
/ Si f i
/ si
C~3 CH3
8 ~ /---
J . 3~ )/50/51
en pr(?pa:l~e(l comm(~rci~lly, m~y con-t~in slllall ~mourlts o:~ the
less volatil~ corresponding 10 me~llbered ring structure. ~his
10 meulhered compouncl, l~hile less volatile than the ~ membered
compound sho~n, does llot interfere with the functioning of the
8 membered ring structure and has u-tility in itself. This
cyclic 8 membered ring polydimethylsiloxane is relatively
volatile and has been foulld to reduce or substantially eliminate
tackiness o~ -the composition when added in the proportions given
above, as well as to enhance the perception of fast drying.
The cyclic polydimethylsiloxane is available, for example,
under the designation Volatile Silicone 7207 from Union Carbide
Corporation or Siloxane SWS-0331~ or 03400 from SWS Silicones,
a division of StoufLer Chemical Company. ~hese silicones can
be characterised generally for example by the iollowing
constants, given by the manufacturer, for SWS-03400: Specific
Gravity 0.960 at 25C; viscosity about 5 cen-tistokes at 25C
ancl 98% volatile components.
~ he cyclic polydimethylsiloxane is employed in an amount
of 5~0 to 40% by weight of the total composition, pre~erably
from about 10% to about 20~/o by weight. If a substantial
excess above ~0/0 is used, it leads to problems of insolubility
of either the silicone or of other components, due to the
reduced alcohol-leve-l, and a high incidence of gelling of -the
composition. In addition to the technical problems raised,
25 higher amounts are uneconomical. If the amolmt used is less
than 5%, the silicone does not adequately fulfil its functionO
Particularly effective levels of silicone to avoid undue gela-
tion and tackiness are from about 10% to about 20% by weight.
c~e~70~ r~e mar,i~
g _ / -
~ J 3~9/~)n/51
'rh~ desirable anti-tacl~ properties may be obtained by
using, ills-tead of the cyclic polydil~ethylsiloxane, cer-tain
essentially non-volatile alcohol soluble polyorganosiloxanes,
namely fro~ 1 -to iO% by weight of the composition of a poly-
phenylmethylsiloxane or a poly higher alkyl siloxane whereineach alkyl group contains at least -three carbon atoms.
Particularly polymethylphenylsiloxanes that may be used
are those having viscosities of about 15 to 65 centistokes at
25C. ~he polyme-thylphenylsiloxalles are available, for example,
from the General Electric Company as SP-1075 methyl phenyl fluid
or from Dow Corning as 556 Cosmetic Grade Fluid. The values
reported for the 55G product are a viscosity of 22.5 centistokes
at 25C and a specific gravity of 0.980.
As exemplifying the poly higher alkyl polysiloxanes where
the higher alkyl group has three or more carbon atoms~ may be
mentioned Union Carbide L43 having a viscosity of 12,000
centistokes at 25C and a specific gravity of 1~08.
The amount of essentially non-volatile polyorganosiloxane
employed, whether polyalkylaryl, higher alkyl or a mixture of
these, is from 1% -to 10% by weight of the total composition,
preferably from about 3% t o about 5% by weight. If the amount
used is too low, the composition is tacky on drying. If too
much is used, the silicone leaves an undesirable oily residue
on the skin. In addition, this fluid ac-ts as a lubr-lcant to
prevent clogging of the pump spray nozzle or roll-ball of a
roll-on applicator.
.
.
J.3~9/5~/51
~7;~
Tlle silieolle flllids use~ mus-t, of course, be alcohol
soluble and comp~tible ~itll the o-ther components and must result
in a proper viscosi-ty for a pulrlp spray or a roll-on.
~rhere a cyclic polydimethylsiloxane is used, this being
relatively volatile may telld to evaporate be-t1~een uses from
the orifice of the pump spray valve, and thus, in some pump
~alve constructions, may leave a powdery residue ~hich may
interfere with the next actuation of the pump. In the case of
a roll-ball the above problem is evident in sticking of the
roll-hall. It has been found that this problem may be
substantially overcome by including in the composition from
0.5 to 10% by weight of the composition of an essentially non-
volatile polyalkylsiloxane, polyalkylarylsiloxane or polyether-
siloxane copolymer.
The essentially non-volatile polyalkylsiloxanes that may
be used are, for example, polydimethylsiloxanes with viscosities
ranging from about 100 to 100,000 centistokes at 25C ~hese
siloxanes are available, for example, from the General Electric
Company as the Viscasil series.
~he essentially non-volatile polyalkylarylsiloxanes that
may be used are, for example, polymethylphenylsiloxanes having
viscosities of about 15 to 65 centistokes at 25C. ~hese
siloxanes are available, for example, from the General Electric
Company as SF1075 methyl phenyl fluid or from Dow Corning as
556 Cosmetic Grade Fluid.
* ~l~no~ej ~aJ~ ~larl~
-- l:L -- /. . .
~ 4~9 J.3~9/50/51
Th~ essenticllly non--volatile po~yethersiloh-ane copolymer
that may be ~l~sed is, for exalnple, a diulethyl polyo~yalkylene
ether copolymer fluid havillg a nominal viscosity of about 1,200
to 1,500 centistokes at 25C. This copolymer is available,
for e~ample, from the ~eneral Electric Company as SF1066
organosilicone surfactant. Preferred compounds of this type
are polysiloxane ethylene ~lycol 0ther copolymers.
~ he pre~erred flui~ is a polyphenylmethylsiloxane with a
viscosity o~ about 22.5 centistokes at 25C and a specific
gravity of 0.980 marketed as Dow Corning 556 by the Dow Corning
Company.
The amount and type of non-volatile fluid employed is
dependant on solubility in the alcohol/volatile silicone
combination used. In the case of the non-volatile polydimethyl-
siloxane fluids, not more than about 1% by weight may besoluble in the composition. In the case of the polyalkylaryl-
siloxane and the polye-thersiloxane copolymer, solubility of
these silicone materials in either alcohol or the volatile
silicone or ~ixtures of alcohol and volatile silicone is
relatively high and thus the maximum amount used is enough to
achieve the desired quality of lubricity. ~he amount of these
latter siloxanes will thus vary from about 0.5% to about 10%~
preferably about 1% to about 3.5%, If a substantial amount
in excess of 10% is used, an esthetically undesirable residue
2B may be left. If the amount used is less than 0~5C/o~ the
silicone does not adequately ful~il its function.
- 12 - /
.: .
, ' '
~72~ cl. 3~9/~/51
~ s mentioned abo~e, in a~dition to pump spray anti-
perspirants, tlle instan-t composition may be used as a roll-on
cleodorant either with or wi-thout incorporating a thickening
agent to achieve the proper visC09ity for applicationO If it
is desirable to use a thic~ening agent, then any compatible
thickening agent may be used in an amount sufficient to thicken
the composition. ~ hydroxypropylcellulose thic~ener, such as
~lucel Type G marketed by ~ercules Powaer Corporation, having
a typical molecular weight of 3~0,0~ ~ay be used. The
viscosity of a 2% solution of this hydroxypropylcellulose in
ethanol will range from about 75 to ~0~ centipoise at 25C.
The :Eollowing Examples will more fully illustrate the
invention. All parts and proportions referred to are by
weight unless otherwise indicated.
Example 1
A number of compositions are prepared utilising Rehydrol
by dissolving the Rehydrol in ethanol and then adding the other
components. Sufficient Rehydrol is added, with stirring at
ambient temperatures, to ethanol to result in a 3~% by weight
solution of ~ehydrol. The balance of the alcohol is then
added with stirring. The triple pressed stearic acid gel
inhibitor (all stearic acid in the ~xamples is triple pressed
and is an approximately 50/0 by weight mixture of stearic and
myristic acids) is then stirred into the Rehydrol solution.
The balance of the ingredien-ts are then added with stirring to
form a solution. The solution is then introduced into the
desired applicator and t0sted.
G/e~e~ ~racle rnar~
- 13 -
- ~7~9 J.3~/5~/51
The compositions preparcd in the above mannex together
with results are given below.
Table 1
_ .
Comparative Example A B C D
,~ % ~ ~
Rehydrol 10.0 15.0 20.0 15.0
Stearic acid 1.0 1.5 l.S
Isopropyl myristate1.0 1.0 1.0 1.0
Alcohol (etbanol)87.5 82.0 77.0 83.5
Perfume 0,5 0,5 0.5 0,5
1~0. 0100. 0100. 0 100. 0
Each of the Examples A to D produce an objec-tionable sticky
feel during drying. Example D, containing no gél inhibitor,
gels on extended ageing.
~able 2
Comparative Example E F
Rehydrol 10.0 15.0
Stearic acid 1.0 3.5
Isopropyl myristate 1.0 1.0
Perfume 0~5 0 5
Ethanol 77.7 74~0
Trichlorotri~luoroethane 9.8
(Freon 11~)
Glycerine ~ 6.0
100.0 1~0.0
Example E, utilising Freon 113 as a spray assist, produces
a stinging sensation and is sticky during drying.
~ d enot4~ ~r~le ~a~ l~
- ' : ' '. . : ,
. ~
.
CJ . 3~/50/51
~C~7Z~9
E.Ya~P1e F, employing no silicone but utilising glycerine
as a lubricant~ feels very sticky during drying.
- 15 _ /
.
~L~7~44~ ~ . 3~9/50/51
c~ ~ o ~no o
l ~`i ~ ~ ~O!) Q ,_~
.1 ~ C~ O a> c~
~ ~ t~
O O u~ O u~O O +~
. . ,~
c~ I ~~ ~ O O O C:~
~1 ~ ~ O
~1 ~ cq ~
O O Q O ~ O q~ 1 0
. ,~ n o ~q
0 1 ~~1 U~ o o ~1 O ~ ~ n
~1 ~ ~ O ~ V rl .~ ~1
~ r
OC~ ~ Q It~ Q O ~ ~ ~ c
i ~i O~1 ~1 1~ 0C'3 Q
C~) O ;~
~1 ~ Crl b~ o
O O u~ Q o ~ o
C~ I S~ QC`;lQ
~I t~ ~q, O~
O O 11~ OU~ O O
In I S-~ O ~ rl O .a~
~1 C 3~ O t~
a~ ~1 0 0
~ ~1 0 ~ O
Q O u~ Q 1~ 0 O
e~l S~i 'I ~ 11~ O ~ I . ~q ~ ~1 ~rl G~
Q ,y,!s~ ~ ~I CR '~
~ ,,~ ,~ ~0 ~.
~1 Q Q O ~ O ~ ~ +~ ~ ~rl o
0oD Q I I ~ bD
~ O O
O O u~ O u~ Q
~1 ~I tD O
1 o o
Q O u~ OLt~ o O c~ o '' ~ ` b
~l ~ ~'I ~1 )~ ~ Q tH tH ^
~1 ~1 ~D G V~ U! ~, ~ O O O ~ U~
~:, C~ ~ C.) C) C~ O S~
U~ cq ~ C~ ~H tH t~ ~R
o ~ a~ o 1
I I I I I I I I 1 ~
~q O Q
~1 ~ O , rl ~ O ~ ~ ;~ C~
?~ t~
t
~q a~ 0
1~1 P: H U~
IS~ O ~ O
.~ ~ C~l
-- 16 -- / -
' '' ' " ' ' , ~ . ', " ' " ' " ,
,
. .
.,. , ' , - :
. . .
.: .
.
J 3~9/50/51
~C~7~9
Oo o u~n o
o l . I I I I I I . I I ~
U~ o ~ o o
o
.,
o o ~,, ~ o
o ~ ~ o C~
CD O
O ~ O Q O O ~ O ;~ O
O ~ .1 0 ~1 C~O O
~1 ~1 ~ o o a~ o
O rQ Q
I~ oQ O O~ O
~1 ~10 1 ~O O
~1 ~I C- Q
~I t~
o
o Q Q ~ O
O Q ~ O G~
~1 ~1 eD O
H ~1
Q Q OQ U~ ~ Q
~> ~ C~ .1~ ~O O ~ o ~D O S O
r-l ~1 ~I t~ O
~ ~ O
E~
C~l ~ Q U~ O O QU~ Q ~;,~ ~ ~ t~O
~1 .1 ~ ~ O O a~ rl O ~
~1 ~I C~ O ~ ~ ~ ~ O
-~1 Q ~ O OU~ 0
CDO O
.1 ~1 ~ O
~ ~ ~ O ~
O ~ ~D ~ OD a~
O ri ~ ~ ~1 ~1 ~ ~1 ~ O
O ~ S O ~ r~
~rl O t;~ ~rl C) O C) tll l~
O O 'Zi O a H G C~ ~ O G t~
3 3 0
o c) ~ X
~1 ~ o ~ o ~3 * W ~ ~:1
~:L ~ 5
a~ o ~C o a~ o ~1 . s~
~ a> ~ ~ q o ~ ~rl
1~ p~ H ~ ~) O H ~ ¢ ~1 1;~ P ~ ~
U~ O U~ O
`: - 17 - /-
' ~
J,3~9/50/51
7Z~49
Table 5
Example G H 19
Chlorhydrol (aluminium 20.0 15.0
chlorhydroxide~
Rehydrol - - 15.0
Stearic acid - - 1.5
Solulan 98* 2.0 2.0
Isopropyl myristate - - 1.0
Siloxane 0331-4 _ 1.0 15.0
Perfume 0.5 0.5 0.5
Water 47.5 31.5
Klucel Type G (hydroxypropyl - - 0.7
cellulose)
Ethanol 30.0 50.0 66.3
100.0 100.0100.0
Example 20
o/o
Alcohol soluble aluminium 15.0
chlorhydrate
Stearic acid 1.5
Isopropyl myristate 1.0
Volatile silicone 7207 15.0
Perfume O.S
Ethanol 67.0
100 0 .
~ r ~e ~bove ~na~K
* An ethosylated lanolin alcohol marketed~ by Amerchol,
, a division of CPC.
- 18 -
.. : .
~ . - , ~ , :
.
1 a 7 ~ 4 49 J.3~9/50/~1
Compn:rative Exatnples G and H, using chlorhydrol and water,
are ve.ry sticky and slow drying.
Examp:Le 19 is a thickened composi-tion suitable for a roll-on.
Example 20, utilising an alcohol soluble aluminium
chlorhydrate other than Rehydrol~ gave good results.
The following Tables 6 to 8 relate to examples of anti-
perspirant compositions in accordance with the invention
comprising the combination of a cyclic polydimethylsiloxane
and a polyalkylsiloxane, polyalkylarylsiloxane or polyether-
siloxane copolymer.
Table 6
Exam~ 21 22 23 24
h ~ ~
Rehydrol 20.0 ~ 15.0 15.0 15.0
Stearic acid 2.0 3.5
Isopropyl myristate1.0 1.0 1.0 1.0
Silicone fluid 556 2.0 1.0 1.0 1.0
Volatile silicone 7207 8.0 15.0 15.0 11.0
Ethanol 66.5 64.0 64.5 67.5
Perfume 0-5 - 0.5 0.5 0.5
~exadecyl alcohol - - 3.0
Crodafas N10 acid - - - 3.0
Oleyl alcohol - - - 1.0
100 . O100 . O100 . O100 . O
_ 1~ /---
~7~49 J-3~9/5~/51
Table 7
-
Example 25 26 27 28
Rehydrol 15.0 15.0 15.0 15.0
Stearic acid i.5 3.5 3.5 1.5
Isopropyl myristate 1.0 - - -
Volatile silicone 7207 11.0 40.0 -40.0 11.0
Silicone fluid 5561.0
Etbanol 70.0 40.0 40.0 70.0
Perfume O.S 0.5 0.5 0.5
Polydimethylsiloxane: - 1.0
Viscasil (60,000 cs)
Polydimethylsiloxane: - - 1.0
SF96 (350 cs)
Dow Corning ~73 ` - - - 2.0
(polyethersiloxane ~
copolymer) 100.0 100.0 100.0 100.0
Table 8
Example 29 30 31 32 33
Rehydrol 14.0 10.015.0 10.0 i2.0
Stearic acid 1.5 - - 1.5
Isopropyl myris-tatei.0 - - 1.0 1.0
~olatile silicone 7207 10.011.0 12.0 10.0 12.0
Silicone fluid 5561.0 i.5 1.0 1.0 1.5
Ethanol 71.0 77Ø71.575.0 73,0
Perfume 0.5 0.5 0.5 0.5 0 5
Aluminium chloride1.0 - - - -
Zirconium oxychloride - - - 1.0
100.0 100.010~.0100~0 iO0.0
.~ - 20 -
.
,
~7~ ,J 3~9/50/51
Examples 21 to 33 inclusive produce accep-table
compositions which are no-t sticky during drying. The
inclusion o~ the polyalkylsiloxane, polyalkylarylsiloxane or
polyethersilo~ane copolymer provides lubricity to the
compositions whereby malfunctioning of the applica-tor is
inhibi-ted.
Examples 1 to 33 had the additional advan-tage, imparted by
the cyclic polydimethylsiloxane, of giving the perception of
quick drying.
Examples 34 to ~ll given hereinafter relate to anti-
perspirant compositions of the inven-tion containing a poly-
phenylmethylsiloxane or a poly higher alkyl siloxane but no
cyclic polydimethylsiloxane. ~hese siloxanes reduce the
tackiness of the compositions in which -they are included and
also are effective to impart luhricity to the composi-tions
whereby malfunctioning o~ the applicator is inhibited.
Example 34
o/o
Rehydrol 15.0
Stearic acid 3.S
Isopropyl myristate 1.0
Perfume 0 5
Ethanol 76.5
Silicone fluid 556 3.5
10~.0
Example 34 is not s-ticky during drying.
~7~44~ J-3~9/5~/51
Tab:le 9
__
E.Yalllple 35 36 37 38 39
Rehydrol 15.010.0 20,0 10.0 15.0
Stearic acid 3.5 2.0 3.5 -
Isopropyl myristate l.0 1.0 1.0
Perfume . 0.5 0.5 0.5 0.5 0.5
Ethanol 78008~.5 71 0 86.0 80.5
Dow silicone fluid 5562.0 2.0 ~.0 3.5 4,0
100 . O100 . O100 . O 100 . O100 . O
Examples 35 to 37 have similar properties to Example 34.
E.Yamples 38 and 39 also give acceptable results and are stable
for at least two months at room temperatures and 105F.
Example 40
0/O
Alcohol soluble aluminium 15.0
chlorhydrate
Stearic acid , l.S
Isopropyl myristate 1.0
Dow silicone fluid 556 3.5
Perfume 0 5
Ethanol 78.5
100.0
_ 22 -
': ' ., ' :
'
J.3~9/5~/51
Exa~ple ~1
-
o/o
Rehydrol 15.0
Stearic acid 2.0
S Isopropyl myristate 1.0
Perfume 0-5
Ethanol 77.5
Union Carbide L-43 silicone fluid 4.0
100.0
:L0 Examples ~0 and ~1 give acceptable non-tacky results.
The Examples show that an antiperspirant composition which
is suitable for application to the skin by means of a pump
spray or a roll-on applicator and comprising an alcoholic
solution of an alcohol soluble aluminium chlorhydroxide such as
Rehydrol is rendered much less tacky during drying by the
incorporation therein of certain siloxanes in accordance with
the present invention. The tack is measured either by
subjective tactile analysis or by a compound lever assembly
attached to an Instron machine which measures the tack of a
particular composition in a graphical mannerL The Instron
test assembly generally measures the force required to separa-te
test surfaces. The formulation is spread on one surface and
then a second surface is brought into contact with the first
surface. As the Instron crosshead moves, the surfaces are
~S separated. If the formulat on is tacky during drying9 an
increase in the force necessary to separate the surfaces is
observed.
_ 23 -
~7~9 J.3~3/50/51
In additi.on to indiviclual labora-tory perYonnel measuring
tacl~, -the -tack iY also measured by -the use of consumer panels.
In such -tes-ts it i~ found tha-t users apprecia-te the clecrease in
-tackiness resulting from -the use oi the particular siloxanes
according to this inven-tion.
- 2~ - ***
