Note: Descriptions are shown in the official language in which they were submitted.
This inven-tion relates to a method for -the prepara-tion
of liquid antiperspirant and deodorant compositions character-
ized by non-sticky and fast-drying properties when applied to
the body area. In addition, -the ac-tive ingredients remain in
suspension for extended periods of time. This invention also
includes within its scope, the resulting liquid antiperspirant
deodorant compositions.
PRIOR ART
Antiperspirant compositions which may contain option-
ally deodorant compounds have been used to inhibit perspiration,as well as,to provide deodorant or antimicrobial properties to
the human body. These compositions have been available in the
form of aqueous sprays, creams and roll-ons. Alrnost all of
these prior art antiperspirant compositions contain either
water or water in admixture with alcohol. One of the major
draw-backs of these conventional water and/or alcohol based
roll-on anti~ersFirants is that they "feel wet and stickyl', and
take a relatively long time to dry wher. applied to -the underarm.
Some aqueous antiperspirant compositions containing water
insolukle ir~gredients have a tendency to separate upon storage,
which make the products cosrnetically unattractive.
THE IN~ENTION
According to the present invention, there is provided
a method for the preparation of a non-aqueous to a low level
aqueous alcoholic liquid antiperspirant and deodorant compos-
i-tion. The composition comprises as antiperspirant compounds
in the form of finely divided particles. Typicall~ these are
aluminum salts for example aluminurn chloride, aluminum hydroxy
bromide, aluminum sulphate and aluminum chlorhydroxide.
Aluminum chlorhydroxide is micronized dry form, for example
from 0.1 to 50 microns are particularly preferred. The selected
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antiperspirant compound is dispersed in polydimethylcyclo-
siloxane. This silicone vehicle is available under a variety of
trademarks. The produc-t identified as Volatile Silicone 7207
by Union Carbide is particularly preEerred. Alternatively, a
mixture of alcohol for example methanol, ethanol, isopropyl with
a small amount of water may be used as the vehicle. Thus, a typ-
ical vehicle may contain up to 80% silicone, the remaining being
alcohol.
Generally speaking, from about 20% to 60% by weight
of the antiperspirant compound may be used; preferrably about
40% by weight.
To this suspension about 0.1% to 5% by weight and
preferrably 1.2% by weight of a suspending agent for example,
organic derivatives of magnesium aluminum silicate minerals such
as Bentone~is added. Bentone is available commercially in gel
form as a 10~ suspension in isopropyl myristate. Ben-tone~ acts
as the suspending agent for the par-ticles.
To stabilize the suspension, a combination of sorbi-
tan monooleate, a metalic stearate and silicone dioxide are
added. Typically~ from 0.5% to 5% and preferrably 4% by weight
of sorbitan morlooleate and from about 1% to 10% by weight of a
metalic stearate for example magnesium stearate and preferrably
5% by weight are added thereto.
About 1.0% to 5% by weight oE silicone dioxide avail-
able as Cab~o Sil~ and preferrably 1% by weight is utilizecl.
The amount of the above ingredients may vary dcpend;ng
upon the particular formula-tion but is within the described range.
The mixture is made into a homogeneous dispersion in
a high speed and high shear mixer.
In a commercial embodiment, the above composition
is filled into suitable containers such as glass or plastic
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bottles. A commercially available "ball-applicator" is then
attached to the top of such a container. The ball may have a
diameter of 2.4 to 3.6 cm and rotates freely within a sleeve or
collar.
In use, the consumer inverts the bottle, the ball
applicator is then coated with the product which can be readily
applied to areas such as the underarm or bringing the ball
applicator in contact with the skin.
The above described product may optionally contain
other ingredients such as deodorants, antimicrobials, emollients
buffering agents and fragrances. A commonly used deodorant
compound such as 2,4,4'-trichlor-2'-hydroxy-diphenyl-ether may
be included in the formulation to broaden the spectrum of the
resulting composition. Other deodorants which may be used
include, for example, 2,2'-thio-bis~'4,6-dichlorophenol or
bis-3,4,-6-trichloro 2-hydroxy-phenyl benthane in an amount
effective to reduce odor forming bacteria on the skin. Buffer-
ing agents such as glycine in the amount of about 0% to 5~ by
weiyht may optionally be incorporated.
The invention will now be illustrated by way of the
following examples.
EXAMPLE 1
-
A homogeneous suspension is prepared, using high
speed, high shear mlxing, from the following ingredients:
INGREDIENT EACH 100 ml ~EQUIRE
_.
Polydimethylcyclosiloxane 55.0 g
(q.s. to 100 ml)
(Volakile Silicone 7207 Union Carbide)
Bentone Gel IPM 12.0 g
(10~ ~entone~Gel in Isopropyl Myrista-te)
Aluminum Chlorhydroxide, Micro Dry 40.0 g
2,4,4'-trichlor-2'Hydroxy-Diphenyl-Ether 0.4 g
(Irgasan~ DP-300)
Perfume 0.1 g
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39~
The foregoing composition does not "feel wet and
sticky" and dries rapidly when applied to the underarm.
However, this composition separates rapidly and must
be remixed by shaking before each application to the underarm.
Various suspension stabilizers were therefore
e~aluated, and Arlacel~ 80, Magnesium Stearate, and Cab-o-Sil~
were found to be most suitable, as outlined in the following
examples.
EXAMPLE 2
A homogeneous suspension is prepared, using high
speed, high shear mixing, from the following ingredients:
INGREDIENT EACH 100 ml REQUIRE
Polydimethylcyclosiloxane 55.0 g
(q.s. to 100 ml)
(~olatile Silicone 7207~ Union Carbide)
Bentone~ Gel IPM 12.0 g
(10% Bentone~Gel in Isopropyl Myristate)
Aluminum Chlorhydroxide, Micro Dry 40.0 g
2,4,4'-trichlor-2'-Hydroxy-Diphenyl-Ether 0.4 g
(Irgasan~ DP-300)
Fragrance 6536 - AB 0.1 g
Arlacel~ 80 4.0 g
Magnesium Stearate 5.0 g
Cab-o-Sil~ M-5 1.0 g
The foregoing composition does not "feel wet and
sticky" and dries rapidly when applied to the underarm.
Furtherrnore, this composition is a stable suspension
that shows ~ery little separation after s-tanding for an extend-
ed period of time.
EXAMPLES 3, 4
A homogeneous suspension is prepared, using high
speed, high shear mixing, from the following ingredients:
g6~
EXAMPLE 3 XAMPLE 4
I~GREDIENT Each 100 ml Each 100 ml
_Require Require _
Polydimethylcyclosiloxan~ 20.0 g 10.0 g
(Volatile Silicone 7207
Union Carbide)
Bentone~Gel IPM 12.0 g 12.0 g
~10% Bentone~ Gel in
Isopropyl Myristate)
Aluminum Chlorhydroxide, 40.0 g 40,0 g
Micro Dry
2,4,4'-trichlor-2'-Hydroxy-0.4 g 0-4 g
Diphenyl-Ether
Perfume 0.5 g 1.0 g
Arlacel~ 80 2.0 g 1.0 g
Magnesium Stearate 1.O g 3.0 g
Cab-o-Sil~ M-5 0.5 g 0.5 g
Isopropanol (q.s. to 100 ml) 30.0 g 28.0 g
Ethanol - 10.0 g
Water 5.0 g 5.0 g
Compositions 3 and 4, like composition 2, are stable
~ suspensions that show very little separation after standing for
`~ an extended period of time.
Compositions 3 and 4 dry faster than the composition
of Example 2.
