Note: Descriptions are shown in the official language in which they were submitted.
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COOLING SENSATION COMPOSITION COMPRISING
3-1-MENTHOXY PROPANE I, 2-DIOL
Field of the Invention
This invention relates generally to a topical composition to cool and refresh
tired, sore
feet and other parts of the body. More specifically the invention relates to
moisturizers in the
form of lotions, creams, and the like formulated with a cooling composition
that imparts a
cooling sensation when applied to the skin of the feet or other parts of the
body.
Back~:;round of the Invention
The problem of sore, tired, aching feet is almost universal. One study reports
that 85%
of the population has foot problems at one time or another. Some people report
their feet feel
"hot" or "tired." Others describe "swollen" and "aching" feet. Many men and
women are
troubled by painful corns. For some, the skin on their feet is often
uncomfortably dry. These
various problems merge in people's minds when they describe sore feet.
A variety of remedies for treating sore, aching feet are known. These include
shoe
inserts, orthopedic appliances, foot massages and foot baths. In addition it
is known that the
use of moisturizers and massage oils can help relieve aching feet. Some people
have a regular
ritual to relieve their foot problems. This may involve regularly rubbing
lotion on the feet, or
using a pumice stone or a file to remove hard, callused areas.
Compositions for rubbing on the feet to soothe them are known. These
compositions
may be as simple as vegetable oils such as sesame oil, or they may be more
complex
compositions comprising a mixture of lubricants, emulsifiers, humectants,
stabilizers,
fragrances, and the like.
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In some cases one or more ingredients to impart a cooling sensation are added
to these
compositions. For example, compositions combining moisturizers with large
amounts of
coolants such as menthol, peppermint oil or eucalyptus oil in amounts
sufficient to impart a
cooling sensation are known. However, when used in effective amounts these
oils often have
a strong, undesirable odor.
In addition to the feet, other parts of the body may also feel sore and
aching, or hot
and tired. The back and shoulders, for example, may sometimes be sore as the
result of
exercise or other physical activity. The hands, too, can feel hot and sore
after certain
activities. Compositions used to soothe these other body parts are known and
used. Like the
compositions used to treat the feet, these compositions containing coolants
often have the
same strong undesirable odor found in foot therapy compositions.
U. S. Patent No. 4,459,425, assigned to Takasago Perfumery Co., Ltd.,
discloses the
compound 3-I-Menthoxypropane-1,2-diol (hereinafter "MPD"). This patent teaches
that
when used in toothpowder, chewing gum; and hard, MPD can impart a long-lasting
cool,
refreshing feeling having no bitter after-taste.
It would be advantageous to provide a topical composition to relieve sore,
tired,
aching feet and other parts of the body by providing a cooling sensation to
the treated part or
parts that does not require the use of a large quantity of a coolant with a
strong, undesirable
odor. It would be further advantageous if the topical composition had a
pleasant odor that
was appealing to the user of the composition.
SLrMMARY
The present invention is directed to a topical composition that imparts a
cooling
sensation to the skin of the feet and other parts of the body comprising
topical compositions
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such as liquids, creams, lotions, gels, and the like, and the cooling compound
3-1-
menthoxypropane 1,2-diol (hereinafter "MPD")
The present invention is further directed to a topical composition that
imparts a
cooling sensation to the skin of the feet and other parts of the body hat has
a pleasant scent
comprising rtopical compositions such as liquids, creams, lotions, gels, and
the like; the
cooling compound MPD; and fragrances provided by natural plant extracts.
The present invention is further directed to a method of making a topical
composition
that imparts a cooling sensation to the skin of the feet and other parts of
the body comprising
topical compositions such as liquids, creams, lotions, gels, and the like and
the cooling
compound MPD.
The present invention is further directed to a method of using a topical
composition by
applying it to the skin of the feet and other parts of the body in a
sufficient amount to impart a
cooling sensation to the skin comprising topical compositions such as liquids,
creams, lotions,
gels, and the like and the cooling compound MPD.
Detailed Description of the Invention
This invention relates to topical compositions that impart a cooling sensation
to the
skin of the feet and other parts of the body comprising: (a) topical
compositions that be
applied to the skin in the form of a liquid, cream, lotion, gel, roll-on,
powder, spray, aerosol,
stick and the like; and, (b) at least one excipient comprising 3-1-menthoxy
propane 1,2-diol
(hereinafter "MPD") in an amount effective for the composition to provide a
cooling sensation
to the skin.
This invention further relates to topical compositions that impart a cooling
sensation to
the skin of the feet and other parts of the body comprising: (a) topical
compositions that be
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applied to the skin in the form of a liquid, cream, lotion, gel, roll-on,
powder, spray, aerosol,
stick and the like; (b) at least on excipient comprising MPD in an amount
effective for the
composition to provide a cooling sensation to the skin; and, (c) fragrances
provided by
natural plant extracts.
One component of the compositions of this invention is MPD. This material is
described in detail in U.S. Patent No. 4,459,425, issued July 10, 1984 to
Amano et al. and
assigned to Takasago Perfumery Co., Ltd. While not to be limited by theory, it
is believed
that the benefits obtained by the use of MPD in the compositions of this
invention are the
result of the unique cooling profile of this compound. MPD is commercially
available from
Takasago Perfumery Co., Ltd., Tokyo, Japan.
The topical compositions of this invention comprise an amount of MPD effective
for
imparting a cooling sensation to the skin. MPD preferably comprises from about
0.01 % to
about 2.0% weight/volume (hereinafter "w/v"); more preferably from about 0.1 %
to about
1.0% w/v; and most preferably from about 0.3% to about 0.6% w/v of the total
composition.
Other compositions besides MPD that impart cooling properties may be
optionally
included in the topical compositions of this invention. These include, but are
not limited to,
naturally occurring essential oils with cooling properties such as eucalyptus,
peppermint oils
and menthol.
The topical compositions of this invention include various forms of topical
products
including, but not limited to, liquids, creams, lotions, gels, roll-ons,
sprays, aerosols, sticks,
and the like. These compositions are formulated with ingredients known to one
skilled in the
art. These ingredients include, for example, humectants, oils, occlusive
agents, keratin
softening agents, emulsifiers, stabilizers and thickeners, and preservatives.
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The topical compositions of this invention can also include fragrances. These
fragrances may be synthetic or they may be derived from natural sources.
Preferably
fragrances from natural sources are used in the compositions of this
invention. These
fragrances include, but are not limited to, peppermint, eucalyptol, rosewood,
lavender,
grapefruit, patchouli, geranium, and rosemary. The amount of fragrance used is
sufficient to
impart an acceptable scent to the composition.
Humectants may also be used in the topical compositions of this invention.
Humectants promote retention of water due to their hygroscopicity, thereby
easing the feeling
of dryness. Suitable humectants include, but are not limited to, propylene
glycol; glycerin;
sorbitol; butylene glycol; hexylene glycol; amino acids; and aloe vera.
Occlusive agents may also be used in the topical compositions of this
invention.
Occlusive agents are substances that promote retention of water due to their
hydrophobicity,
thereby preventing water loss from the skin. Suitable occlusive agents
include, but are not
limited to, fatty esters; fatty alcohols; mineral oils; stearic acid;
silicones; triglycerides; lanolin
alcohol; squalane; silicones; and, petrolatum.
Keratin softening agents may also be used in the topical compositions of this
invention.
Keratin softening agents soften the skin, as well as cosmetically improve its
appearance.
Suitable keratin softening agents include, but are not limited to, urea;
lactic acid; and,
allantoin.
Emulsifiers may also be used in the topical compositions of this invention.
Suitable
emulsifiers include, but are not limited to, cetyl alcohol; stearic acid;
monoglyceryl stearate;
stearyl alcohol; triethanolamine acrylate; steareths; lanolin; derivatives of
polyethylene glycol;
magnesium aluminum silicate; polyoxyethylene monostearate; and, propylene
glycol
monostearate.
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Stabilizers and thickeners may also be used in the topical compositions of
this
invention. Suitable stabilizers and thickeners include, but are not limited
to, xanthan gum;
carbomer; cetyl alcohol; acrylate co-polymers; guar gum; magnesium aluminum
silicate;
glyceryl monostearate; methylcellulose; and, stearyl alcohol.
Preservatives may also be used in the topical compositions of this invention.
Suitable
preservatives include, but are not limited to, parabens such as methyl
paraben, ethyl paraben,
butyl paraben, and propyl paraben; diazolidinyl urea; EDTA; quaternium 1 ~;
glycasii L;
phenoxyethanol; and, glutaraldehyde.
This invention also relates to methods for making the topical compositions of
this
invention. In general, the topical compositions of this invention are made by
forming an
admixture of the components of this invention. The preferred method for making
the
compositions of this invention is provided below in Example 1.
This invention further relates to methods for employing the topical
compositions of this
invention. In general the topical compositions of this invention are employed
by contacting
them with the skin in an amount sufficient to impart a cooling sensation to
the skin.
The following Examples further describe and demonstrate embodiments within the
scope of this invention. They are for illustrative purposes only, and should
not be construed as
limiting the scope of the invention as recited in the claims that follow. All
parts and
percentages set forth therein are based upon a weight percentage of the entire
topical
anesthetic composition.
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EXAMPLE 1
No. INGREDIENTS PERCENT
1. + Purified Water 50-80
2. Xanthan gum NF .O1-1
3. Carbopol Ultrez 10 .O1-1
4. Edetate Disodium USP .O1-2
5. sorbitol Solution USP 1-5
6. Methyl arabe NF .1-.2
7. Trolamine NF 99% .3-.2
I 8. Mineral Oil Light 5-25
9. Lanolin Absor lion Base 5-30
10. Cet l Alcohol .2-5
1 1. Stearic Acid .2-6
12. Glvceryl Stearate Pure .5-5
13. Pro I araben .1-.2
14. But lparaben .1-.2
15. MPD .O1-2
16. Perfume 1 8
'
17. +purified Water q.s. 1
-
1. Begin mixing 1 in a stainless steel steam jacketed vessel, and slowly add 2
and 3. Mix for
30-45 minutes. Start heating to 65° C.
2. Add 4, 5, 6 and 7 to A. While mixing continue heating to 65° C.
3. Transfer 8 and 9 to a suitable stainless steel container and heat to
65° C.
4. While mixing add 10, 11, 12, 13, 14 and 15 and mix until dissolved.
5. While mixing B slowly add C to B and continue mixing for 15 minutes at
65° C. Then
cool the batch to 40° C.
6. Add 16 to D. Continue mixing and further cooling to 35° C..
*Trade-mark
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EXAMPLE 2
A composition of this invention was prepared and packaged for distribution to
women
in an in-home use test. Each of the women taking part was given a sample of
prototype
product to try out for a few days at home. The results were quite positive.
They are
summarized in Table l, below.
Those who took a positive attitude were favorably impressed with the results.
They
said their feet felt soothed and relaxed, cooled and refreshed. The very act
of massaging their
feet with the product was said to be very pleasant.
Some of those tested were pleased to report that their feet were already
showing the
benefit of using the new product. They now had feet that were less red and
sore with fewer
rough patches around the heels: The skin felt softer, and even the corns felt
better.
TABLE 1
Number of Interviews:
Extremely good 10
Ve Good 11
Evaluation: Good 12
Avera a 1
Poor
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