U.S. patent application number 11/144313 was filed with the patent office on 2006-01-05 for personal care compositions with improved hyposensitivity.
Invention is credited to Christine Marie Cahen.
Application Number | 20060002876 11/144313 |
Document ID | / |
Family ID | 34930458 |
Filed Date | 2006-01-05 |
United States Patent
Application |
20060002876 |
Kind Code |
A1 |
Cahen; Christine Marie |
January 5, 2006 |
Personal care compositions with improved hyposensitivity
Abstract
The present invention provides personal care compositions
comprising a carrier and a mixture of essential oil components
having specific levels of eucalyptol, terpene materials and
auxiliary fragrance materials. The compositions herein gentle to
skin and have a fragrance and activity similar if the composition
were made using the pure extracted essential oil.
Inventors: |
Cahen; Christine Marie;
(Virginia Water, GB) |
Correspondence
Address: |
THE PROCTER & GAMBLE COMPANY;INTELLECTUAL PROPERTY DIVISION
WINTON HILL TECHNICAL CENTER - BOX 161
6110 CENTER HILL AVENUE
CINCINNATI
OH
45224
US
|
Family ID: |
34930458 |
Appl. No.: |
11/144313 |
Filed: |
June 3, 2005 |
Current U.S.
Class: |
424/70.1 ;
512/1 |
Current CPC
Class: |
A61K 8/342 20130101;
A61K 8/31 20130101; A61P 25/22 20180101; A61P 19/00 20180101; A61K
8/498 20130101; A61K 8/35 20130101; A61K 8/37 20130101; A61K 8/33
20130101; A61Q 19/00 20130101; A61Q 13/00 20130101; A61K 8/34
20130101 |
Class at
Publication: |
424/070.1 ;
512/001 |
International
Class: |
A61K 8/37 20060101
A61K008/37; A61K 8/34 20060101 A61K008/34 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 2, 2004 |
EP |
04253993.2 |
Claims
1. A personal care composition comprising: a) from about 0.01% to
about 15% of a eucalyptol; b) from about 0.01% to about 10% of a
terpene material comprising .quadrature.-pinene,
.quadrature.-pinene, .quadrature.-phellandrene, para-cymene and
mixtures thereof; c) from about 0.0001% to about 0.01% of a
auxiliary fragrance material comprising amyl cinnamal, benzyl
alcohol, cinnamyl alcohol, citral, eugenol, hydroxy-citronellal,
isoeugenol, amylcin-namyl alcohol, benzyl-salicylate, cinnamal,
coumarin, geraniol, hydroxy-methylpentylcyclohexanecarboxaldehyde,
anisyl alcohol, benzyl cinnamate, farnesol,
2(4-tert-butylbenzylpropionaldehyde), linalool, benzyl benzoate,
citronellol, hexyl cinnam-aldehyde, limonene, methyl heptin
carbonate,
3-methyl-4-(2,6,6-tri-methyl-2-cyclohexen-1-yl)-3-buten-2-one, and
mixtures thereof; and d) a carrier.
2. The personal care composition according to claim 1 wherein the
auxiliary fragrance material comprises limonene, linalool, benzyl
alcohol, geraniol and mixtures thereof.
3. The personal care composition according to claim 1 wherein the
composition is in the form of a topical composition.
4. The personal care composition according to claim 1 wherein the
composition is selected from the group consisting of a liquid,
viscous liquid, gel, paste, and combinations thereof.
5. The personal care composition according to claim 3 wherein said
topical composition is a leave-on product.
6. The personal care composition according to claim 1 comprising
from about 0.0001% to about 0.005% auxiliary fragrance
material.
7. The personal care composition according to claim 1 wherein the
carrier comprises water, petrolatum, and mixtures thereof.
8. The personal care composition according to claim 1 comprising
from about 1% to about 99.9799% carrier.
9. The personal care composition according to claim 1 having a
viscosity of from about 1 mPas to about 100 Pas at 25.degree.
C.
10. The personal care composition according to claim 1 wherein the
ratio of terpene material to auxiliary fragrance material is from
about 1:1 to about 1:10000.
11. The personal care composition according to claim 1 in the form
of an emulsion.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to the field of personal care
compositions comprising essential oils. More specifically, the
present invention provides personal care compositions comprising a
mixture of essential oil components having improved hyposensitivity
whilst maintaining well-rounded fragrance characteristics and
aromatherapeutic application.
BACKGROUND OF THE INVENTION
[0002] Many personal care compositions on the market today contain
essential oils as fragrances, and more recently as active
ingredients useful for the treatment of a variety of ailments. Such
uses have been generated out of the interest associated with
aromatherapy, in which various essential oils are vaporized and
inhaled by the user. This practice has led to the use of rosemary
and lavender oils for relaxation, eucalyptus and citrus oils for
the treatment of respiratory infections, and a variety of other
novel oils used as analgesics, muscle relaxants and the like.
[0003] Essential oils are a mixture of chemical entities, the
majority of which are terpene-like materials. Each essential oil
comprises a unique mixture of terpenes and other similar materials
that provide the individual fragrance and activity of the essential
oil. The composition of an essential oil is dependent not only upon
the source of the oil, but also upon the method of extraction.
Different extraction methods can generate essential oils having
differing levels and ratios of important components, and this in
turn can result in essential oils having different fragrance and
activity profiles, despite being isolated from the same source.
[0004] A problem associated with essential oils is the fact that
they can contain auxiliary fragrance materials some of which are
recognized as potential allergens and/or irritating agents. These
materials, in a proportion of the population, can cause
hypersensitivity-type reactions, or skin irritation, manifested as
skin redness, burning, itching, and in severe cases, edema and skin
peeling. Unfortunately, these same auxiliary fragrance materials
such as limonene, linalool, benzyl alcohol and geraniol in
combination with terpenes such as .quadrature.- and
.quadrature.-pinene and .quadrature.-phellandrene are typically
fundamental to the fragrance of the essential oil and, in some
instances, required for the purported aromatherapeutic activity of
the oil in question. By simply eliminating these auxiliary
fragrance materials in the essential oil, the oil typically does
not meet the user's expectation in both fragrance impact and
roundness and aromatherapeutic activity. Therefore, a need exists
for personal care compositions comprising essential oils or
materials thereof, which have improved allergen profiles. More
precisely, a need exists for personal care compositions comprising
essential oils that have reduced levels of auxiliary fragrance
materials, but also a select level and ratio of these materials in
combination with a base fragrance and specific terpene materials in
order to deliver the fragrance and activity of the essential oil
without associated sensitivity problems.
[0005] U.S. Pat. No. 5,298,238 to Hussein et al. discloses liquid
oral compositions comprising deterpenated and fractionated
peppermint oil. The compositions therein comprise very low levels
of 1,8-cineole, .quadrature.- and .quadrature.-pinenes and linalool
and limonene. U.S. Application 2003/0012830 A1 discloses a topical
composition comprising eucalyptol, .quadrature.-pinene and acetone.
EP 1048293 A discloses head-lice treatment compositions comprising
eucalyptol and limonene in water. WO 98/17749 discloses an
essential oil extracted from the shrub Kunzea Ambigua which
contains high levels of .quadrature.- and .quadrature.-pinenes. WO
98/17229 discloses medicaments comprising at least 25% eucalyptol,
and at least 25% limonene. U.S. Application 2003/0113277 A1
discloses oral care compositions comprising eucalyptol and limonene
for masking the taste of phenolics such as triclosan present in the
compositions. The above compositions either do not deliver the
required reduced level of auxiliary fragrance materials to avoid
sensitivity reactions and therefore are not hyposensitive formulae,
or do not contain enough auxiliary fragrance materials to generate
a well-rounded fragrance or associated aromatherapeutic
activity.
[0006] It has been found that personal care compositions can be
formulated with essential oil component materials that reconstitute
the essential oil in the composition to maximize the fragrance and
activity associated with the essential oils therein, whilst
improving the hyposensitivity of the compositions by selectively
blending the constituent fragrance materials. It has further been
found that removing the auxiliary fragrance materials entirely
lessens the impact of the essential oil, and that by incorporating
these materials at low levels and in select ratios with other
terpene materials, a mixture is generated having fragrance and
activity similar to the pure extracted essential oil that is gentle
to skin.
SUMMARY OF THE INVENTION
[0007] The present invention is directed towards providing personal
care compositions comprising: [0008] a) from 0.01% to 15%
eucalyptol; [0009] b) from 0.01% to 10% terpene material comprising
.quadrature.-pinene, .quadrature.-pinene,
.quadrature.-phellandrene, para-cymene or mixtures thereof; [0010]
c) from 0.0001% to 0.01% auxiliary fragrance material comprising
amyl cinnamal, benzyl alcohol, cinnamyl alcohol, citral, eugenol,
hydroxy-citronellal, isoeugenol, amylcin-namyl alcohol,
benzyl-salicylate, cinnamal, coumarin, geraniol,
hydroxy-methylpentyl-cyclohexanecarboxaldehyde, anisyl alcohol,
benzyl cinnamate, farnesol, 2(4-tert-butylbenzylpropionaldehyde),
linalool, benzyl benzoate, citronellol, hexyl cinnam-aldehyde,
limonene, methyl heptin carbonate,
3-methyl-4-(2,6,6-tri-methyl-2-cyclohexen-1-yl)-3-buten-2-one, or
mixtures thereof; [0011] d) a carrier. The compositions herein are
gentle to skin and have a fragrance and activity similar if the
composition were made using the pure extracted essential oil.
DETAILED DESCRIPTION OF THE INVENTION
[0012] All weights, measurements and concentrations herein are
measured at 25.degree. C. on the composition in its entirety,
unless otherwise specified.
[0013] Unless otherwise indicated, all percentages of compositions
referred to herein are weight percentages and all ratios are weight
ratios.
[0014] Unless otherwise indicated, all molecular weights are weight
average molecular weights.
[0015] Unless otherwise indicated, the content of all literature
sources referred to within this text are incorporated herein in
full by reference.
[0016] Except where specific examples of actual measured values are
presented, numerical values referred to herein should be considered
to be qualified by the word "about".
[0017] Active and other ingredients useful herein may be
categorized or described herein by their cosmetic and/or
therapeutic benefit or their postulated mode of action. However, it
is to be understood that the active and other ingredients useful
herein can in some instances provide more than one cosmetic and/or
therapeutic benefit or operate via more than one mode of action.
Therefore classifications herein are made for the sake of
convenience and are not intended to limit an ingredient to the
particularly stated application or applications listed.
[0018] The personal care compositions of the present invention
comprise: [0019] a) from 0.01% to 15% eucalyptol; [0020] b) from
0.01% to 10% terpene material comprising .quadrature.-pinene,
.quadrature.-pinene, .quadrature.-phellandrene, para-cymene or
mixtures thereof; [0021] c) from 0.0001% to 0.01% auxiliary
fragrance material comprising amyl cinnamal, benzyl alcohol,
cinnamyl alcohol, citral, eugenol, hydroxy-citronellal, isoeugenol,
amylcin-namyl alcohol, benzyl-salicylate, cinnamal, coumarin,
geraniol, hydroxy-methylpentyl-cyclohexanecarboxaldehyde, anisyl
alcohol, benzyl cinnamate, famesol,
2(4-tert-butylbenzylpropionaldehyde), linalool, benzyl benzoate,
citronellol, hexyl cinnam-aldehyde, limonene, methyl heptin
carbonate,
3-methyl-4-(2,6,6-tri-methyl-2-cyclohexen-1-yl)-3-buten-2-one, or
mixtures thereof; [0022] d) a carrier.
[0023] The compositions herein are gentle to skin and have a
fragrance and aromatherapeutic activity almost as if the
composition were made using the pure extracted essential oil.
[0024] The personal care compositions of the present invention
comprise a base fragrance material. The base fragrance material of
the present invention comprises eucalyptol. Eucalyptol is also
known as 1,8-cineole, and is a terpene-like material isolated from
and named for eucalyptus essential oil. Eucalyptol is widely found
in essential oils and used in synthetic fragrances in varying
amounts. It is thought to be an important component of eucalyptus
oil and other essential oils, and responsible for a wide variety of
activities and fragrances associated therewith. Eucalyptol
generally has a chemical structure as set out below: ##STR1## The
personal care compositions of the present invention comprise from
about 0.01% to about 15% eucalyptol. Preferably the personal care
compositions herein comprise from about 0.1% to about 10%, more
preferably from about 0.2% to about 8%, more preferably still from
about 0.5% to about 5% eucalyptol by weight.
[0025] Eucalyptol is commercially available extracted from natural
sources such as eucalyptus oil. Suitable examples of commercially
available sources include eucalyptol available from Symrise (UK),
Frey and Lau (UK) or FDL (UK).
[0026] The personal care compositions of the present invention
further comprise a terpene material. Said terpene material
comprises .quadrature.-pinene, .quadrature.-pinene,
.quadrature.-phellandrene, para-cymene or mixtures thereof. Without
wishing to be bound by theory, it is believed that the terpene
material is useful herein, in combination with the allergenic
fragrance material, for generating the characteristic fragrance
notes, and providing effects such as relaxation, calming, muscle
relaxation and analgesia associated with essential oils such as
eucalyptus, rosemary and lavender.
[0027] The compositions of the present invention comprise from
about 0.01% to about 10% terpene material, preferably from about
0.1% to about 6%, more preferably from about 0.5% to about 5%
terpene material by weight, more preferably still from 0.5% to
4%.
[0028] The terpene materials according to the present invention
correspond to the chemicals having the structure as set out in the
table below. TABLE-US-00001 Name Structure .quadrature.-pinene
##STR2## .quadrature.-pinene ##STR3## .quadrature.-phellandrene
##STR4## Para-cymene ##STR5##
[0029] The personal care compositions of the present invention
comprise from about 0.0001% to about 0.01% auxiliary fragrance
material. The auxiliary fragrance material of the present invention
comprises amyl cinnamal, benzyl alcohol, cinnamyl alcohol, citral,
eugenol, hydroxy-citronellal, isoeugenol, amylcin-namyl alcohol,
benzyl-salicylate, cinnamal, coumarin, geraniol,
hydroxy-methylpentylcyclohexanecarboxaldehyde, anisyl alcohol,
benzyl cinnamate, farnesol, 2(4-tert-butylbenzylpropionaldehyde),
linalool, benzyl benzoate, citronellol, hexyl cinnam-aldehyde,
limonene, methyl heptin carbonate,
3-methyl-4-(2,6,6-tri-methyl-2-cyclohexen-1-yl)-3-buten-2-one, or
mixtures thereof. Preferably said auxiliary fragrance material
comprising limonene, linalool, benzyl alcohol, geraniol or mixtures
thereof. Auxiliary fragrance materials are materials that are
recognized as potentially potent allergens and/or irritating
agents. These materials, in a proportion of the population, can
cause hypersensitivity-type reactions, or skin irritation,
manifested as skin redness, burning, itching, and in severe cases,
edema and skin peeling. Unfortunately, these same materials are
typically fundamental to the fragrance of the essential oil and, in
some instances, required for the purported aromatherapeutic
activity. However, simply removing these materials reduces the
fragrance and effectives of the personal care composition. Without
wishing to be bound by theory, it is believed that the compositions
herein, by using these auxiliary fragrance materials at levels that
typically do not generate sensitivity reactions, but whilst still
being present in the composition, generates a subliminal fragrance
change to the user, and is capable of providing the
aromatherapeutic activities associated with pure essential
oils.
[0030] The personal care compositions of the present invention
preferably comprise from about 0.0001% to about 0.005% auxiliary
fragrance materials, more preferably from about 0.0001% to about
0.001%. Preferably, the terpene material and the auxiliary
fragrance material are formulated in the personal care compositions
herein in ratios that enable the materials to act synergistically
to provide fragrance and active benefits, whilst not generating a
sensitivity-type response. Without being limited by theory, it is
believed that both the auxiliary fragrance materials and terpene
materials are essential to elicit the consumer response to
essential oils, however, the combination herein allows the amount
of auxiliary fragrance material present to be limited whilst still
providing fragrance and active benefits. Preferably the ratio of
terpene material to auxiliary fragrance material is from about 1:1
to about 1:10000, more preferably from about 1:10 to about
1:1000.
[0031] The personal care compositions of the present invention
further comprise a carrier. The carrier may be any material capable
of carrying and delivering the fragrance materials herein in a
stable and consumer-aesthetic form. Such carriers must also be
suitable for application to the skin, hair, oral mucosa, preferably
the skin (i.e. topical application), more preferably sensitive skin
such as that of a baby. Suitable carriers include water, C.sub.2 to
C.sub.6 monohydric alcohols, petrolatum, fluid silicone materials
such as dimethicones, or mixtures thereof. Preferred carriers
herein include water, petrolatum, or mixtures thereof. Preferably,
the compositions of the present invention comprise from about 1% to
about 99.9799% carrier, more preferably from about 40% to about
95%, more preferably still from about 50% to about 93% carrier.
[0032] The personal care compositions of the present invention may
be in any form suitable for consumer use. The compositions may be
formulated as a leave-on composition or a rinse-off composition. As
used herein, "leave-on compositions" includes products that are
intended to be applied to a bodily surface of a consumer such as
the skin or hair and maintained on the surface for a prolonged
time, preferably at least 5 minutes, more preferably at least 30
minutes, without being actively removed by washing, rinsing,
wiping, rubbing or other forms of mechanical removal. As used
herein, "rinse-off compositions" includes compositions that are
intended to be applied to a bodily surface of a consumer, such as
the skin or hair, and subsequently removed by washing, rinsing,
wiping, rubbing or other forms of mechanical removal within less
than 5 minutes of application. Preferably, the composition is a
leave-on composition.
[0033] The personal care composition of the present invention may
be formulated as a lotion, an aerosol, a cream, a gel, a, liquid, a
viscous liquid, or a paste. Alternatively, the compositions herein
may comprise a patch that can be applied to the user's body or
clothing. Preferably, such patches comprise an adhesive layer that
enables attachment to the user's body or clothing. In a further
alternative embodiment, the compositions herein need not be applied
directly to the user's body or clothing, but rather be applied to
an object that is positioned near to the user. This type of
delivery method comprises dispensing the composition either as a
series of droplets or via atomization (i.e. aerosol) onto a
substrate such as the cloth of a pillow case, or a handkerchief. As
used herein, "liquid" includes compositions having a viscosity of
less than 10 mPas at 25.degree. C. As used herein, "viscous liquid"
means a liquid composition that has a viscosity of from about 10
mPas to about 300000 mPas when measured at 25.degree. C., more
prefereably from 50 mPas to 150 000 mPas. Viscosity herein is
measured on neat composition using a Brookfield RVT, T-C Spindle at
5 rpms and Heliopath Stand. Viscous liquid compositions have a
viscosity that is greater than that of water, and typically provide
improved application characteristics when compared with products
having a viscosity similar to that of water when applied directly
by the user using manual (i.e. hand) application. Liquid
compositions are preferable when dispensed as an aerosol or
droplets. Preferably the personal care compositions of the present
invention are a liquid, viscous liquid or gel.
[0034] Where the carrier comprises water or other low viscosity,
liquid material, it may be preferable to increase the viscosity of
the composition by employing a thickening agent. The compositions
of the present invention comprise from about 0.1% to about 5%,
preferably from about 0.1% to about 3%, and more preferably from
about 0.25% to about 2%, thickening agent by weight of the
composition.
[0035] Suitable thickening agents include cellulose and derivatives
such as cellulose, carboxymethyl hydroxyethylcellulose, cellulose
acetate propionate carboxylate, hydroxyethylcellulose, hydroxyethyl
ethylcellulose, hydroxypropyl-cellulose, hydroxypropyl
methylcellulose, methyl hydroxyethylcellulose, micro-crystalline
cellulose, sodium cellulose sulfate, and mixtures thereof. Also
useful herein are the alkyl-substituted celluloses. In these
polymers, the hydroxy groups of the cellulose polymer is
hydroxyalkylated (preferably hydroxyethylated or hydroxypropylated)
to form a hydroxyalkylated cellulose which is then further modified
with a C.sub.10-C.sub.30 straight chain or branched chain alkyl
group through an ether linkage. Typically these polymers are ethers
of C.sub.10-C.sub.30 straight or branched chain alcohols with
hydroxyalkylcelluloses. Examples of alkyl groups useful herein
include those selected from the group consisting of stearyl,
isostearyl, lauryl, myristyl, cetyl, isocetyl, cocoyl (i.e. alkyl
groups derived from the alcohols of coconut oil), palmityl, oleyl,
linoleyl, linolenyl, ricinoleyl, behenyl, and mixtures thereof.
Preferred among the alkyl hydroxyalkyl cellulose ethers is the
material given the CTFA designation cetyl hydroxyethylcellulose,
which is the ether of cetyl alcohol and hydroxyethylcellulose. This
material is sold under the tradename Natrosol.TM. CS Plus from
Aqualon Corporation.
[0036] Other useful thickeners include acacia, agar, algin, alginic
acid, ammonium alginate, amylopectin, calcium alginate, calcium
carrageenan, carnitine, carrageenan, dextrin, gelatin, gellan gum,
guar gum, guar hydroxypropyltrimonium chloride, hectorite,
hyaluroinic acid, hydrated silica, hydroxypropyl chitosan,
hydroxypropyl guar, karaya gum, kelp, locust bean gum, natto gum,
potassium alginate, potassium carrageenan, propylene glycol
alginate, sclerotium gum, sodium carboxymethyl dextran, sodium
carrageenan, tragacanth gum, xanthan gum, and mixtures thereof.
Also useful are acrylic acid/ethyl acrylate copolymers and the
carboxyvinyl polymers sold by the B.F. Goodrich Company under the
trademark of Carbopol resins. Suitable Carbopol resins are
described in WO98/22085.
[0037] Preferred compositions of the present invention include a
thickening agent selected from carboxylic acid polymers,
crosslinked polyacrylates, poly-acrylamides, xanthan gum and
mixtures thereof, more preferably selected poly-acrylamide
polymers, xanthan gum and mixtures thereof. Preferred
polyacrylamides are predispersed in a water-immiscible solvent such
as mineral oil and the like, containing a surfactant (HLB from
about 7 to about 10) which helps to facilitate water dispersibility
of the polyacrylamide. Also preferred for use herein is the
non-ionic polymer under the CTFA designation: polyacrylamide and
isoparaffin and laureth-7, available under the trade name Sepigel
305 from Seppic Corporation. More preferred for use herein are the
co-polymer compositions commercially available from BASF Corp.
under the tradename Luvigel EM.TM. and the co-polymer compositions
available from CIBA Speciality Chemicals, Macclesfield, UK, under
the tradename Salcare SC91.TM..
[0038] The personal care compositions of the present invention may
further comprise emollient materials including branched chain
hydrocarbons having an weight average molecular weight of from
about 100 to about 15,000, preferably from about 100 to 1000;
compounds of formula I: ##STR6## wherein R.sup.1 is selected from H
or CH.sub.3, R.sup.2, R.sup.3 and R.sup.4 are independently
selected from C.sub.1-C.sub.20 straight chain or branched chain
alkyl, and x is an integer of from 1-20; and compounds having the
formula (II): ##STR7## wherein R.sup.5 is selected from optionally
hydroxy or C.sub.1-C.sub.4 alkyl substituted benzyl and R.sub.6 is
selected from C.sub.1-C.sub.20 branched or straight chain alkyl;
and mixtures thereof.
[0039] Suitable branched chain hydrocarbons for use herein include
isododecane, isohexadecane, isoeicosane, isooctahexacontane,
isohexapentacontahectane, isopentacontaoctactane, and mixture
thereof. Suitable for use herein are branched chain aliphatic
hydrocarbons sold under the trade name Permethyl.TM. and
commercially available from Presperse Inc., P.O. Box 735, South
Plainfield, N.J. 07080, U.S.A. Suitable ester emollient materials
of Formula I above include, but are not limited to, methyl
isostearate, isopropyl isostearate, isostearyl neopentanoate,
isononyl isononanoate, isodecyl octanoate, isodecyl isononanoate,
tridecyl isononanoate, myristyl octanoate, octyl pelargonate, octyl
isononanoate, myristyl myristate, myristyl neopentanoate, myristyl
octanoate, myristyl propionate, isopropyl myristate and mixtures
thereof. Suitable ester emollient materials of Formula (II) include
but are not limited to C12-15 alkyl benzoates.
[0040] Preferred emollients for use herein are isohexadecane,
isononyl isononanoate, methyl isostearate, isopropyl isostearate,
and mixtures thereof.
[0041] The emollient material is preferably present in the
compositions at a level of from about 0.1% to about 10%.
[0042] The compositions herein may comprise an emulsifier and/or
surfactant. For convenience hereinafter emulsifiers will be
referred to under the term `surfactants`, thus `surfactant(s)` will
be used to refer to surface active agents whether used as
emulsifiers or for other surfactant purposes such as skin
cleansing. Known or conventional surfactants can be used in the
composition, provided that the selected agent is chemically and
physically compatible with essential components of the composition,
and provides the desired characteristics.
[0043] The compositions of the present invention preferably
comprise from about 0.05% to about 20% of a surfactant or mixture
of surfactants. The exact surfactant or surfactant mixture chosen
will depend upon the intended use, pH and the other components
present in the composition. Surfactants suitable for use herein
include anionic surfactants, cationic surfactants, zwitterionic
surfactants, nonionic surfactants, or mixtures thereof.
[0044] Suitable nonionic surfactants useful herein are those that
can be broadly defined as condensation products of long chain
alcohols, e.g. C.sub.8-30 alcohols, with sugar or starch polymers,
i.e., glycosides. Preferred examples include a mixture of cetearyl
glucosides and cetearyl alcohols such as those commercially
available as Montanov 68.TM. from Seppic and Emulgade PL68/50.TM.
available from Henkel.
[0045] Other useful nonionic surfactants include the condensation
products of alkylene oxides with fatty acids (i.e. alkylene oxide
esters or diesters of fatty acids). Other nonionic surfactants are
the condensation products of alkylene oxides with fatty alcohols
(i.e. alkylene oxide ethers of fatty alcohols). Still other
nonionic surfactants are the condensation products of alkylene
oxides with both fatty acids and fatty alcohols. Still other useful
nonionic surfactants include poly-hydroxy fatty acid amide
surfactants, which are described in more detail in WO98/04241.
Other nonionic surfactants suitable for use herein include sugar
esters and polyesters, alkoxylated sugar esters and polyesters,
C.sub.1-C.sub.30 fatty acid esters of C.sub.1-C.sub.30 fatty
alcohols, alkoxylated derivatives of C.sub.1-C.sub.30 fatty acid
esters of C.sub.1-C.sub.30 fatty alcohols, alkoxylated ethers of
C.sub.1-C.sub.30 fatty alcohols, poly-glyceryl esters of
C.sub.1-C.sub.30 fatty acids, C.sub.1-C.sub.30 esters of polyols,
C.sub.1-C.sub.30 ethers of polyols, alkyl phosphates,
polyoxyalkylene fatty ether phosphates, fatty acid amides, acyl
lactylates, and mixtures thereof. Other nonionic surfactants useful
herein are fatty acid ester blends based on a mixture of sorbitan
or sorbitol fatty acid ester and sucrose fatty acid ester, the
fatty acid in each instance being preferably C.sub.8-C.sub.24, more
preferably C.sub.10-C.sub.20, commercially available examples of
which include Arlatone 2121.TM. available from ICI.
[0046] Anionic surfactants are also useful in the present
compositions. See, e.g., U.S. Pat. No. 3,929,678, to Laughlin et
al., issued Dec. 30, 1975. Exemplary anionic surfactants include
the alkoyl isethionates (e.g., C.sub.12-C.sub.30), alkyl and alkyl
ether sulfates and salts thereof, alkyl and alkyl ether phosphates
and salts thereof, alkyl methyl taurates (e.g., C.sub.12-C.sub.30),
and soaps (e.g., alkali metal salts, e.g., sodium or potassium
salts) of fatty acids.
[0047] Amphoteric and zwitterionic surfactants are also useful
herein. Examples of amphoteric and zwitterionic surfactants which
can be used in the compositions of the present invention are those
which are broadly described as derivatives of aliphatic secondary
and tertiary amines in which the aliphatic radical can be straight
or branched chain and wherein one of the aliphatic substituents
contains from about 8 to about 22 carbon atoms (preferably
C.sub.8-C.sub.18) and one contains an anionic water solubilising
group, e.g., carboxy, sulfonate, sulfate, phosphate, or
phosphonate. Examples are alkyl imino acetates, and
iminodialkanoates and aminoalkanoates, imidazolinium and ammonium
derivatives. Other suitable amphoteric and zwitterionic surfactants
are those selected from the group consisting of betaines,
sultaines, hydroxysultaines, alkyl sarcosinates (e.g.,
C.sub.12-C.sub.30), and alkanoyl sarcosinates.
[0048] Emulsions of the present invention may include a silicone
containing emulsifier or surfactant. A wide variety of silicone
emulsifiers are useful herein. These silicone emulsifiers are
typically organically modified organopolysiloxanes, also known to
those skilled in the art as silicone surfactants. Useful silicone
emulsifiers include dimethicone copolyols. Other examples include
alkyl-modified dimethicone copolyols, i.e., compounds that contain
C.sub.2-C.sub.30 pendant side chains. Still other useful
dimethicone copolyols include materials having various cationic,
anionic, amphoteric, and zwitterionic pendant moieties.
[0049] The personal care compositions of the present invention may
further comprise chamomile oil. Chamomile oil is useful in the
present invention where the personal care composition is intended
for use with babies or infants. Chamomile oil is hypoallergenic,
and provides a soothing fragrance that babies and infants find
pleasant. The personal care compositions preferably comprise from
0.0001% to 2% chamomile oil. Commercially available sources of
chamomile oil include Bontou (FR), Payan & Betrand (FR) and
Citrus & Allied (US).
[0050] The personal care compositions of the present invention may
further include other perfume or fragrance materials that are
acceptable to consumers, whilst not altering the hyposensitivity
profile of the compositions herein. Suitable perfume or fragrance
materials are known to those skilled in the art including chemical
musk compounds, chemical wood compounds, chemical powder compounds,
and chemical floral compounds. Non-limiting examples of fragrance
materials suitable for use herein include cajeput oil, fennel oil,
geranium oil, girfole oil, lemon oil, spearmint oil, myrtle oil,
oregano oil, pine oil, sarriette oil, thyme oil, tea-tree oil or
mixtures thereof. Furthermore, fragrance materials may further
comprise the chemical constituents of essential oils such as
vanillin, ethyl vanillin, musk, methyl-dihydro-jasmonate, anethol,
catechole, camphene, ferulic acid, farnesol, hinokitiol, tropolone,
menthol, methyl salicylate, carvacol, terpineol, verbenone,
berbinene, ratanhiae extract, caryophellene oxide, citronella acid,
curcumin, nerolidol or mixtures thereof. These materials may be
used at levels and ratios known to those skilled in the art of
mixing fragrance materials for personal care compositions, whilst
maintaining the levels of base fragrance comprising eucalyptol,
terpene materials and auxiliary fragrance materials according to
the present invention.
[0051] The personal care compositions of the present invention may
further comprise active ingredients. Suitable active ingredients
include skin benefit agents, analgesics, anesthetics, neutralizing
agents, sunscreening agents or mixtures thereof. The compositions
of the present invention preferably comprise from about 0.01% to
about 20% of these active ingredients.
[0052] Analgesic, antipyretic and anti-inflammatory agents useful
herein include, but are not restricted to the group comprising
acetaminophen, aspirin, diclofenac, diflunisal, etodolac,
fenoprofen, flurbiprofen, ibuprofen, ketoprofen, ketorolac,
nabumetone, naproxen, piroxicam, caffeine, eugenol, thymol, or
mixtures thereof. Local anesthetics useful herein include
lidocaine, benzocaine, phenol, dyclonine, benzonotate, or mixtures
thereof.
[0053] Water-soluble skin benefit agents useful herein include
vitamin B.sub.3 compounds, humectants, amino acids, vitamin C
compounds, panthenol and derivatives, or mixtures thereof. Suitable
oil soluble actives for use herein include vitamin E and its
derivatives, salicylic acid and other beta-hydroxy acids, perfumes
and occlusion materials, and mixtures thereof.
[0054] Another optional ingredient is neutralizing agents.
Neutralizing agents suitable for use in neutralizing acidic groups
containing hydrophilic gelling agents herein include sodium
hydroxide, potassium hydroxide, ammonium hydroxide,
monoethanolamine, diethanolamine, amino methyl propanol,
tris-buffer and triethanolamine.
[0055] A further optional component may comprise sunscreening
agents. Preferred among those sunscreens which are useful in the
compositions of the invention are those selected from 2-ethylhexyl
p-methoxycinnamate, 2-ethylhexyl N,N-dimethyl-p-aminobenzoate,
p-aminobenzoic acid, 2-phenylbenzimidazole-5-sulfonic acid,
octocrylene, oxybenzone, homomenthyl salicylate, octyl salicylate,
4,4'-methoxy-t-butyldibenzoylmethane, 4-isopropyl dibenzoylmethane,
3-benzylidene camphor, 3-(4-methylbenzylidene) camphor, titanium
dioxide, zinc oxide, silica, iron oxide, Parsol MCX, Eusolex 6300,
Octocrylene, Parsol 1789, and mixtures thereof.
[0056] Generally, the sunscreens can comprise from about 0.5% to
about 20% of the compositions useful herein. Exact amounts will
vary depending upon the sunscreen chosen and the desired Sun
Protection Factor (SPF). SPF is a commonly used measure of
photoprotection of a sunscreen against erythema. See Federal
Register, Vol. 43, No. 166, pp. 38206-38269, Aug. 25, 1978.
[0057] The personal care compositions herein are preferably in the
form of an emulsion, such as a water-in-oil or oil-in-water
emulsion. The oil phase may contain different materials, or
different combinations of materials, or may contain multiple oil
phases. The total level of oil phase components in the compositions
of the invention is typically from about 0.1% to about 60%,
preferably from about 1% to about 30%, more preferably from about
3% to about 20% and most preferably from about 5% to about 15%.
[0058] In preferred embodiments, the oil phase preferably comprises
oily components such as a natural or synthetic oils selected from
mineral, vegetable, and animal oils, fats and waxes, fatty acid
esters, fatty alcohols, fatty acids and mixtures thereof. Preferred
for use herein are for example, saturated and unsaturated fatty
alcohols such as behenyl alcohol, cetyl alcohol and stearyl alcohol
and hydrocarbons such as mineral oils.
[0059] Preparation
[0060] The personal care compositions of the present invention are
prepared typically as "reconstituted essential oils" dispersed in a
carrier. The term "reconstituted essential oils" herein includes
essential oils that are generated by mixing together individual raw
materials in levels and ratios that, when dispersed in the
composition, correspond to the levels of the present invention.
Furthermore, "reconstituted essential oils" includes fractionated
essential oils that have had the majority of the terpene materials
and auxiliary fragrance materials removed such as those disclosed
in U.S. Pat. No. 5,298,238 which have then had the terpene
materials and auxiliary fragrance materials added back into the
essential oil base (comprising eucalyptol) and then dispersed in a
carrier at the levels according to the present invention.
Furthermore, the compositions of the present invention may be
prepared using essential oils that have been specifically
fractionated to provide levels of eucalyptol, terpene materials
comprising .quadrature.-pinene, .quadrature.-pinene,
.quadrature.-phellandrene or mixtures thereof, and auxiliary
fragrance materials according to the present invention when
dispersed in the carrier of the personal care composition.
EXAMPLES
[0061] The following examples were manufactured using techniques
known to those skilled in the art. The base fragrance (eucalyptol),
terpene materials and auxiliary fragrance materials were blended
together separately before being added to the compositions to give
the final amounts specified. The following examples are
illustrative only, and not intended to limit the scope of the
present invention. TABLE-US-00002 Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex.
6 Ingredient (% wt) (% wt) (% wt) (% wt) (% wt) (% wt) Petrolatum
q.s. 100 q.s. 100 q.s. 100 -- -- 10 Water -- -- -- q.s. 100 q.s.
100 q.s. 100 Ethanol -- -- -- -- -- 20 Eucalyptol 6.655 0.7 1.305
0.25 0.45 5.00 .quadrature.-pinene 2.5 0.5 0.3 0.05 0.1 1.3
.quadrature.-pinene 0.3 0.01 0.3 0.05 0.05 1.5
.quadrature.-phellandrene -- -- 0.01 0.01 -- 0.5 Limonene 0.003
0.0006 0.0003 0.01 -- 0.008 Linalool 0.0001 0.0001 0.0003 -- 0.0005
0.001 Benzyl Alcohol -- -- -- -- 0.0001 -- Geraniol -- -- -- --
0.0002 0.001 Chamomile Oil 0.0001 -- 0.15 0.10 -- -- Sodium
Laureth-3-Sulfate -- -- -- 11.80 11.80 -- Cocamidopropyl Betaine --
-- -- 3.25 3.25 -- Sodium Lauroyl Sarcosinate -- -- -- 0.50 0.50 --
Polyquaternium-10 -- -- -- 0.10 0.10 -- PEG-200 Glyceryl Palmate --
-- -- 1.00 1.00 -- Potassium Sorbate -- -- -- 0.25 0.25 -- Sodium
Benzoate -- -- -- 0.25 0.25 0.1 Citric Acid Anhydrous -- -- -- 0.30
0.30 -- Sodium Citrate -- -- -- 1.00 1.00 --
[0062] All documents cited in the Detailed Description of the
Invention are, in relevant part, incorporated herein by reference;
the citation of any document is not to be construed as an admission
that it is prior art with respect to the present invention. To the
extent that any meaning or definition of a term in this written
document conflicts with any meaning or definition of the term in a
document incorporated by reference, the meaning or definition
assigned to the term in this written document shall govern.
[0063] While particular embodiments of the present invention have
been illustrated and described, it would be obvious to those
skilled in the art that various other changes and modification can
be made without departing from the spirit and scope of the
invention. It is therefore intended to cover in the appended claims
all such changes and modifications that are within the scope of
this invention.
* * * * *