U.S. patent application number 11/567336 was filed with the patent office on 2007-06-14 for soluble patch.
This patent application is currently assigned to L'OREAL. Invention is credited to Odile Aubrun-Sonneville.
Application Number | 20070134481 11/567336 |
Document ID | / |
Family ID | 38179902 |
Filed Date | 2007-06-14 |
United States Patent
Application |
20070134481 |
Kind Code |
A1 |
Aubrun-Sonneville; Odile |
June 14, 2007 |
SOLUBLE PATCH
Abstract
An article, preferably a patch, containing: a support in the
form of at least one sheet containing fibres that are water-soluble
at a temperature of 0-30.degree. C., and a composition carried by
the support, containing at least one water-soluble gelling agent
which swells in less than 30 seconds in water at a temperature of
20.degree. C. to 30.degree. C.
Inventors: |
Aubrun-Sonneville; Odile;
(Antony, FR) |
Correspondence
Address: |
OBLON, SPIVAK, MCCLELLAND, MAIER & NEUSTADT, P.C.
1940 DUKE STREET
ALEXANDRIA
VA
22314
US
|
Assignee: |
L'OREAL
Paris
FR
|
Family ID: |
38179902 |
Appl. No.: |
11/567336 |
Filed: |
December 6, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60752051 |
Dec 21, 2005 |
|
|
|
Current U.S.
Class: |
428/292.1 |
Current CPC
Class: |
A61Q 1/14 20130101; D04H
1/4391 20130101; D04H 1/4309 20130101; A61Q 19/008 20130101; Y10T
428/24744 20150115; Y10T 428/249924 20150401; A45D 2040/0093
20130101; A45D 40/00 20130101; A61Q 19/08 20130101; A61Q 19/005
20130101; Y10T 442/2877 20150401; A61Q 19/004 20130101; Y10T
442/696 20150401; A61K 8/0208 20130101; Y10T 442/2861 20150401;
A61Q 19/00 20130101 |
Class at
Publication: |
428/292.1 |
International
Class: |
D04H 13/00 20060101
D04H013/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 7, 2005 |
FR |
05 53752 |
Claims
1. An article, comprising: a support in the form of at least one
sheet comprising fibres that are water-soluble at a temperature of
0-30.degree. C., and a composition carried by the support,
comprising at least one water-soluble gelling agent which swells in
less than 30 seconds in water at a temperature of 20.degree. C. to
30.degree. C.
2. The article according to claim 1, wherein the fibres that are
water-soluble at a temperature less than or equal to 30.degree. C.
are prepared with polyvinyl alcohol.
3. The article according to claim 1, wherein the at least one sheet
comprising fibres that are water-soluble is a nonwoven.
4. The article according to claim 1, wherein the at least one sheet
comprising fibres that are water-soluble further comprises
water-insoluble fibres.
5. The article according to claim 4, wherein the amount of
water-insoluble fibres is at most 40% by weight relative to the
total weight of the fibres.
6. The article according to claim 1, wherein the support comprises
at least two sheets, at least one of which comprises fibres that
are water-soluble at a temperature of 0-30.degree. C.
7. An article according to claim 1, comprising: a support in the
form of at least two sheets that together define one or more
cavities, at least one of the sheets comprising fibres that are
water-soluble at a temperature of 0-30.degree. C., the cavity
comprising a composition comprising a water-soluble gelling agent
which swells in less than 30 seconds in water at a temperature of
20.degree. C. to 30.degree. C.
8. The article according to claim 7, wherein at least two of the
sheets of fibres are nonwovens.
9. The article according to claim 7, wherein one of the sheets is a
nonwoven consisting of fibres that are water-soluble at a
temperature of 0-30.degree. C., and another of the sheets is a
nonwoven consisting of water-insoluble fibres.
10. The article according to claim 7, wherein the at least two
sheets are assembled at their periphery.
11. The article according to claim 10, wherein the sheets are
heat-sealed.
12. The article according claim 7, wherein the support is entirely
water-soluble.
13. The article according to claim 1, wherein the amount of
water-soluble gelling agent ranges from 5 to 100% by weight
relative to the total weight of the composition.
14. The article according to claim 1, wherein the gelling agent
comprises at least one of karaya gum, konjac gum, modified
starches, and mixtures thereof.
15. The article according to claim 1, wherein the composition
carried by the support represents between 10 and 1000% by weight
relative to the weight of the support.
16. The article according to claim 1, wherein the composition
carried by the support further comprises at least one compound
chosen from foaming surfactants, polymers, lipophilic compounds,
exfoliants, active agents, and mixtures thereof.
17. The article according to claim 1, wherein it constitutes an
article for cleansing or removing makeup from the skin, for the
treatment of signs of ageing, for the treatment of greasy skin, for
moisturizing the skin, for scrubbing the skin, for sun protection
and antisun treatment, or for the treatment of sensitive or
sensitized skin.
18. The article according claim 1, wherein the support is entirely
water-soluble.
19. A composition obtained by dissolving the article according to
claim 1 in water.
20. A process for treating a keratin material, comprising:
dissolving in water a support in the form of at least one sheet
comprising fibres that are water-soluble at a temperature of
0-30.degree. C. and a composition carried by the support comprising
at least one water-soluble gelling agent which swells in less than
30 seconds in water at a temperature of 20.degree. C. to 30.degree.
C. in water to form a resultant composition; and applying the
resultant composition to the keratin material.
21. A kit comprising: a packaging, at least one article,
comprising: a support in the form of at least one sheet comprising
fibres that are water-soluble at a temperature of 0-30.degree. C.,
and a composition carried by the support, comprising at least one
water-soluble gelling agent which swells in less than 30 seconds in
water at a temperature of 20.degree. C. to 30.degree. C.
Description
REFERENCE TO PRIOR APPLICATIONS
[0001] This application claims priority to U.S. provisional
application 60/752,051 filed Dec. 21, 2005, and to French patent
application 0553752 filed Dec. 7, 2005, both incorporated herein by
reference.
FIELD OF THE INVENTION
[0002] The present invention relates to articles of manufacture
such as patches that comprise a water-soluble support and a
composition carried by the support, and to the uses thereof, in
particular in the cosmetics field.
[0003] Additional advantages and other features of the present
invention will be set forth in part in the description that follows
and in part will become apparent to those having ordinary skill in
the art upon examination of the following or may be learned from
the practice of the present invention. The advantages of the
present invention may be realized and obtained as particularly
pointed out in the appended claims. As will be realized, the
present invention is capable of other and different embodiments,
and its several details are capable of modifications in various
obvious respects, all without departing from the present invention.
The description is to be regarded as illustrative in nature, and
not as restrictive.
BACKGROUND OF THE INVENTION
[0004] In the cosmetics field, it is known practice to use cosmetic
patches that consist of a water-insoluble support impregnated with
a cosmetic composition. A patch is, by definition, applied to a
limited area of skin, the area being more or less large, which
allows the slow release of an active substance by transdermal
effect, and thus the effective treatment of specific areas.
However, insoluble-support patches have the drawback, firstly, of
generating waste to be eliminated and, secondly, of being able to
perform only one function and of not being modulatable according to
the desired aim, contributing to an increase in the number of
products to be used in routine care. Now, it may be advantageous to
have products that can have two functions depending on the method
of application, for example a foaming cleansing product that can be
used daily, but that can also be used weekly as a specific
treatment with a leave-on time for greater effectiveness.
[0005] Moreover, water-soluble thin films containing active agents
have been described, which films are moistened with water to give a
composition (solution, dispersion or emulsion) that is then spread
on the skin. Document WO-A-02/05789 describes, for example, such
films. However, these films have the drawback of being complex to
manufacture, with solubilization of the components, heating and
drying in order to obtain a dry film. In addition, they are
difficult to dry if they are too thick, and they are fragile and
difficult to handle if the size is too great.
SUMMARY OF THE INVENTION
[0006] There remains therefore the need to have articles of
manufacture, including patches, that do not have the drawbacks of
those of the prior art, and in particular to have rinse-off or
wipe-off articles that can have several functions, for example that
can be used, as required by users, as a patch or care product, that
can constitute, for example, a daily product to be used diluted, or
a weekly product to be used on a defined area with a leave-on
time.
[0007] The present application satisfies this need. Specifically,
the inventor has found, surprisingly, that it is possible to
prepare articles comprising a support containing soluble fibres and
a specific gelling agent, and to obtain, by dissolution of these
articles in water or in an aqueous medium, a gelled composition for
example, in particular a gelled cosmetic composition that has good
cosmetic properties and that can constitute a patch.
[0008] The use of articles of this type makes it possible to lift
the constraints of formulation in so far as these articles can
produce a large range of products, from gels to creams, for various
applications, according to the composition applied to the
support.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0009] Thus, according to one of its aspects, the invention
discloses a cosmetic or dermatological article, comprising: [0010]
a support in the form of at least one sheet comprising fibres that
are water-soluble at a temperature less than or equal to 30.degree.
C., and [0011] a composition carried by the support, containing at
least one water-soluble gelling agent which swells in less than 30
seconds in water at a temperature of 20.degree. C. to 30.degree.
C.
[0012] The expression "cosmetic or dermatological article" means a
cosmetic or dermatological product comprising a solid support
including a composition carried by this support. This article may
constitute especially a patch to be wetted and applied on the
skin.
[0013] In the present application, the expression "carried by the
support" means that the composition may be either placed on the
support or introduced into the cavity formed by the support when
the latter comprises at least two supports (e.g., sheets)forming a
cavity. Of course, both situations may occur in the same article
depending on the extent of overlap of the at least two supports.
"On the support" includes composition located in interstices of the
support.
[0014] The expression "temperature less than or equal to 30.degree.
C." means a temperature that does not exceed 30.degree. C. but is
not less than 0.degree. C., e.g., 0-30.degree. C., for example
ranging from more than 0.degree. C. to 30.degree. C., better still
from 5.degree. C. to 30.degree. C., and even better still from
10.degree. C. to 30.degree. C., including 15, 20 and 25.degree. C.,
and all ranges and subranges therebetween.
[0015] The expression "gelling agent which swells in less than 30
seconds in water at a temperature of 20.degree. C. to 30.degree.
C." means a gelling agent which swells rapidly after being
introduced into 20.degree. C. to 30.degree. C. water at a
concentration of 5 to 50% by weight.
[0016] When used, the gelling agent(s) used according to the
invention will preferably swell rapidly in water so as to form a
material that does not run and that can thus be readily applied to
the area to be treated.
[0017] The presence of the water-soluble gelling agent allows the
article to be converted to a more or less smooth gel or paste, for
example after a contact time of less than 30 minutes with a small
amount of water at ambient temperature (20 to 30.degree. C.), so as
to be able to be used in particular as a rinse-off patch to be
applied locally (for example, on the area of the nose or of the
forehead) with a leave-on time for a stronger action, or as a
product to be applied to a more extensive area (for example, the
entire face), a multifunctional article according to the needs of
the user. The term "multifunctional article" means an article
which, as required by the user, can be employed differently, for
example as a patch in a limited area or as a cleansing product in a
larger area. In the case of the patch, the article is simply
moistened so as to obtain a thick gel. In the case of the cleansing
product, the article can be solubilized in a larger amount of water
so as to obtain a product that is easier to spread and less
concentrated in terms of active agent for treating a widespread
area.
[0018] For example, the article can constitute a patch for greasy
skin for the nose, to be used once a week, allowing a targeted
treatment with keratolytic and/or antibacterial active agents; the
patch is moistened before use, it is left on for a few minutes (for
example 10 minutes), then it is subsequently rinsed off and/or
wiped off. Before rinsing or wiping, it can also be spread on the
remainder of the face, possibly by adding water, so as to treat or
cleanse the entire face with a less concentrated formula.
[0019] The article according to the invention can also constitute a
formula to be rehydrated before use with an amount of water to be
adjusted by the consumer depending on the desired texture or the
desired activity.
[0020] Preferably, this article constitutes a soluble or partially
soluble patch. The term "partially soluble" means that the article
comprises a support comprising at least 60% by weight of
water-soluble fibres relative to the total weight of fibres.
[0021] The terms "sheet" and "layer" are synonyms in the present
application. The support of the present invention is preferably in
the form of one or more sheets of fibres, which is different from
the water-soluble thin films which are not in the form of sheets of
fibres. Compared with these water-soluble thin films, the supports
based on water-soluble fibre sheets according to the invention have
the advantage of allowing the incorporation of incompatible
constituents, and being simpler to use since they do not require
any premixing or solubilization of the components, nor heating to
evaporate off the solvent, the process also being more rapid and
less expensive. In addition, the supports according to the
invention have the advantage of allowing a greater diversity in the
choice of the shape and the appearance of the article since the
fibre sheet can vary in thickness and density providing the
opportunity for a great variety of size and shape, whereas the thin
film is difficult to dry if it is too thick, and it is fragile and
difficult to handle if the size is too great.
[0022] According to a preferred embodiment of the invention, the
article is in the form of at least two sheets that together define
a cavity, at least one of the sheets comprising fibres that are
water-soluble at a temperature less than or equal to 30.degree. C.,
[0023] the cavity containing a composition containing a
water-soluble gelling agent which swells in less than 30 seconds in
water at a temperature of 20.degree. C. to 30.degree. C.
[0024] The two sheets are preferably assembled at their periphery
and thus form a cavity for introducing the composition containing
the water-soluble gelling agent.
[0025] The sheets can be formed entirely of water-soluble fibres or
else one of the sheets can consist entirely of water-soluble fibres
and the other sheet can consist of insoluble fibres or of both
water-soluble fibres and water-insoluble fibres, or else the two
sheets can consist of both soluble fibres and insoluble fibres.
[0026] According to a specific preferred embodiment of the
invention, at least one of the sheets consists exclusively of
water-soluble fibres
[0027] A gelled composition for topical application, in particular
a cosmetic or dermatological composition, is obtained by moistening
or dissolving the article according to the invention in water or in
an aqueous composition.
[0028] Thus, a subject of the invention, according to another of
its aspects, is also a composition for topical application,
obtained by dissolving, in water, an article as defined above, i.e.
a composition obtained by dissolving a support in the form of at
least one sheet comprising fibres that are water-soluble at a
temperature less than or equal to 30.degree. C., said support
carrying at least one water-soluble gelling agent which swells in
less than 30 seconds in water at a temperature of 20.degree. C. to
30.degree. C. This composition may be obtained from a support
comprising one or more layers of fibres. The temperature for
dissolving the article in water is generally ambient temperature
(20 to 30.degree. C.), but may be above ambient temperature if
desired, depending on the use envisaged.
[0029] A subject of the invention, according to another of its
aspects, is also a cosmetic process for treating keratin materials
such as the skin, the hair, the mucous membranes and the
integuments, and in particular for treating the skin, comprising:
[0030] the formation of a cosmetic composition by dissolving, in
water, a support comprising at least one sheet comprising fibres
that are water-soluble at a temperature less than or equal to
30.degree. C., and carrying at least one water-soluble gelling
agent which swells in less than 30 seconds in water at a
temperature of 20.degree. C. to 30.degree. C., [0031] the
application of the composition thus formed to the keratin
materials,
[0032] The cosmetic treatment may in particular be skin care.
[0033] The expression "water-soluble at a temperature less than or
equal to 30.degree. C." should be understood to mean solubilization
in water at a temperature ranging up to 30.degree. C. with the aid
of manual agitation and/or friction of the support, where
appropriate, for a period of time typically less than 5 min,
preferably less than 1 min, preferably less than 30 seconds. The
invention does not exclude water at a temperature above 30.degree.
C. being used to dissolve the support.
[0034] Since the article according to the invention is intended for
topical application, it preferably comprises a physiologically
acceptable medium. The term "physiologically acceptable medium"
means a medium compatible with keratin materials such as the skin,
the lips, the nails, the scalp and/or the hair. The same is true of
the support, and also of the composition carried by the
support.
[0035] The article according to the invention preferably does not
contain any adhesive, but it can adhere to the skin when it is
moistened.
[0036] This article is preferably flexible, i.e. supple. The term
"supple" should be understood to mean an article that can be
compressed or that can bend without breaking, and that can adjust
to the contours of the human body. A supple article produced in the
form of a fibrous sheet can, in certain examples of implementation,
be folded over at least once without breaking into two pieces.
[0037] This article is generally preferably a single-use
article.
[0038] Moreover, the article is preferably generally dry to the
touch before use.
[0039] After the article has been manufactured, it can, for
example, be packaged in bulk in a box, or in an individual
packaging. Where appropriate, the articles are packaged as a
string. The articles can also be folded over on themselves and
intercalated, such that the withdrawal of an article brings the
next one into a configuration that facilitates it being
gripped.
[0040] Thus, a subject of the invention, according to another of
its aspects, is also an assembly comprising: [0041] a packaging,
[0042] at least one article as defined above.
[0043] The invention thus offers new possibilities for the
packaging and the formulation of patches.
[0044] In an example of implementation of the invention, the
article made up of the support and the composition containing the
water-soluble gelling agent is intended to be brought into contact
with water before it is used. The support is thus first completely
solubilized before the article is applied to the human body.
According to the amount of water added to the article in order to
solubilize the support, the apparent viscosity of the patch
obtained can be readily adjusted.
[0045] In another variant of implementation of the invention, the
article made up of the support and the composition carried by the
support is brought into contact with a region of the human body,
for example the skin or the hair, before it is completely
solubilized, or even before it is made wet. This may make it
possible, for example, depending on the amount of water added, to
modify the properties according to the desired result. Water can be
poured onto the article although the latter is not in contact with
the region of the body to be treated, or else the region of the
body can also be moistened, or else water can be projected or
poured onto the support while the article is in contact with the
region to be treated.
[0046] According to a preferred method of use of the article
according to the invention, the article is run under water and is
applied to the area to be treated.
Support
[0047] The support is preferably in the form of a sheet comprising
water-soluble fibres, i.e. fibres that are water-soluble at a
temperature less than or equal to 30.degree. C., preferably
water-soluble at a temperature less than or equal to 20.degree. C.,
i.e. having a temperature for dissolution in water ranging from
more than 0.degree. C. to 30.degree. C., preferably from more than
0.degree. C. to 20.degree. C., and for example from 5.degree. C. to
30.degree. C., and better still from 5 to 20.degree. C.
[0048] The support may have any shape and preferably has a shape
suitable for the intended use, for example a rectangular, round or
oval shape, and it preferably has dimensions that allow it to be
gripped between at least two fingers. Thus, the support may have,
for example, an ovoid shape approximately 2 to 10 cm long and
approximately 0.5 to 4 cm wide, or a disc shape approximately 2 to
10 cm in diameter, or a square shape, the length of the sides being
approximately 5 to 15 cm, or a rectangular shape approximately 5 to
15 cm long, it being understood that it may have any other shape
and size suitable for the desired use.
[0049] The fibres of the support are generally entangled so as to
form the sheet of fibres. As indicated above, the expression "sheet
comprising water-soluble fibres" means a sheet that may consist
entirely of water-soluble fibres or a sheet that may comprise both
water-soluble fibres and water-insoluble fibres, there preferably
being more soluble fibres than insoluble fibres. The sheet of
fibres very preferably should comprise at least 60% by weight of
soluble fibres, more preferably at least 70%, and better still at
least 80% by weight relative to the total weight of the fibres. It
can thus comprise, for example, more than 95% by weight, or even
more than 99% by weight and even 100% by weight of water-soluble
fibres relative to the total weight of the fibres of the support.
Thus, the support may consist entirely of sheets of soluble fibres
or it may consist of sheets comprising a mixture of soluble fibres
and insoluble fibres, the insoluble fibres being, according to the
definition of the present invention, fibres which are not
water-soluble at a temperature less than or equal to 30.degree. C.
The fact of having insoluble fibres may make it possible to have a
product with a thermal effect that at the same time is a scrub
product, the insoluble fibres constituting the exfoliating
compound.
[0050] Thus, the support can be formed from two sheets consisting
of water-soluble fibres, or else from a sheet consisting of
water-soluble fibres and a sheet comprising both soluble fibres and
insoluble fibres, or alternatively also from a sheet consisting of
water-soluble fibres and a sheet consisting of water-insoluble
fibres, or else from two sheets comprising both soluble fibres and
insoluble fibres. There may also be more than two sheets, each of
which can independently comprise one or both of soluble fibres and
insoluble fibres.
[0051] According to a preferred embodiment of the invention, the
support is free of water-insoluble fibres and it is composed only
of water-soluble fibres, such that it is entirely
water-soluble.
[0052] The soluble fibres may be made of any soluble material that
can be spun into fibres. Preferably, the water-soluble fibres are
produced with polyvinyl alcohol (PVA) according to a process which
gives them the desired solubility, it being possible for the PVA to
have several degrees of polymerization.
[0053] PVA fibres that are water-soluble at a temperature less than
or equal to 30.degree. C. are marketed by the Japanese company
Kuraray under the trade name Kuralon K-II WN2. The process for
manufacturing these fibres comprises the preparation of a solution
to be spun, by dissolution of a water-soluble PVA-based polymer in
a first organic solvent, the spinning of the solution in a second
organic solvent so as to obtain solidified filaments, and the wet
drawing out of the filaments, from which the first solvent is
removed, and which are then dried and subjected to a thermal
treatment. The cross section of these fibres may be substantially
circular. These fibres have a tensile strength of at least 2.7
g/dtex (3 g/d). Application EP-A-0 636 716 describes such PVA-based
water-soluble fibres and the process for the manufacture
thereof.
[0054] The invention is not limited to the use of PVA, and fibres
made of other water-soluble materials can also be used, with the
proviso that these materials dissolve in water having the desired
temperature, for example polysaccharide fibres marketed under the
name Lysorb by the company Lysac Technologies, Inc, or polyholoside
polymer-based fibres such as glucomannan or starch.
[0055] The sheet of fibres can, where appropriate, comprise a
mixture of various fibres that are water-soluble at different
temperatures (up to 30.degree. C.).
[0056] The fibres may be composites, and they may, for example,
comprise a core and a sheath that are not of the same nature, for
example formed from various grades of PVA.
[0057] When the sheet of fibres contains insoluble fibres, the
latter can be made of any material useful as insoluble fibres; this
may be, for example, fibres made from silk, cotton, wool, flax,
cellulose extracted in particular from wood, vegetables or algae,
polyamide (Nylon.RTM.), polylactic acid, modified cellulose (rayon,
viscose, acetate, in particular rayon acetate),
poly-p-phenyleneterephthalamide, in particular Kevlar.RTM.,
acrylic, in particular poly(methyl methacrylate) or
poly(2-hydroxyethyl methacrylate), polyolefin, and in particular
polyethylene or polypropylene, glass, silica, aramide, carbon, in
particular in graphite form, Teflon.RTM., insoluble collagen,
polyesters, polyvinyl chloride or polyvinylidene chloride,
polyvinyl alcohol, polyacrylonitrile, chitosan, polyurethane,
polyethyleneterephthalate, fibres formed from a mixture of the
compounds mentioned above, such as polyamide/polyester fibres or
viscose/polyester fibres. Nonwovens are described, in general, in
Riedel "Nonwoven Bonding Methods & Materials", Nonwoven World
(1987), incorporated herein by way of reference.
[0058] In a specific example of implementation of the invention,
the support sheet is a nonwoven comprising water-soluble fibres,
alone or as a mixture with insoluble fibres as indicated above,
with at most 40% by weight of insoluble fibres relative to the
total weight of the fibres forming the sheet. Preferably, the
nonwoven consists of water-soluble fibres, i.e. it does not contain
insoluble fibres.
[0059] The support may be substantially non-retractable once
wet.
[0060] When the support comprises only one sheet of fibres, the
composition containing the gelling agent can be deposited on the
two faces of the support or on a single face, it being possible for
the other face of the support to then be used, for example, for
gripping the article.
[0061] When the support according to the present invention
comprises two sheets, they may in a preferred embodiment be two
sheets of nonwoven, it being possible for all the embodiments
described below to be used, it being possible for the sheets to
contain or not contain insoluble fibres, and it even being possible
for one of the sheets to consist only of insoluble fibres, provided
that the other sheet contains soluble fibres.
[0062] According to a specific embodiment of the invention, each of
the sheets is a nonwoven consisting of fibres that are soluble at a
temperature less than or equal to 30.degree. C., i.e. the sheets
contain only water-soluble fibres.
[0063] According to another embodiment, one of the sheets is
entirely water-soluble and is a nonwoven consisting of fibres that
are soluble at a temperature less than or equal to 30.degree. C.,
and the other sheet is insoluble and is a nonwoven consisting of
insoluble fibres.
[0064] According to yet another embodiment, the support comprises
two sheets containing soluble or partially soluble fibres with at
most 40% of insoluble fibres, and, in addition, a sheet consisting
of insoluble fibres, constituting an insoluble substrate. Thus, the
support may comprise at least one layer of a water-insoluble
substrate, i.e. a substrate comprising only insoluble fibres. In a
specific example of this embodiment, the support comprises a
soluble sheet of a nonwoven consisting of fibres that are
water-soluble at a temperature less than or equal to 30.degree. C.,
and an insoluble sheet of a nonwoven consisting of water-insoluble
fibres.
[0065] A multilayer structure with at least one layer formed from a
water-insoluble substrate can, for example, be of use for producing
an article comprising a support in the shape of a fingerstall. The
layer formed from water-soluble fibres is located on the outside of
the article, intended to solubilize during use, after having been
moistened or upon coming into contact with a moistened region of
the body.
[0066] All the appropriate techniques for constituting a nonwoven
from fibres can be used to manufacture the sheets made of nonwoven,
regardless of whether they are soluble or insoluble. For example,
the fibres can be formed by extrusion and deposited on a conveyor
to form a sheet of fibres which is then consolidated by means of a
standard fibre bonding technique, for instance needle bonding,
hot-bonding, calendering or air-through bonding, in which technique
the sheet passes through a tunnel in which hot air is blown. The
latter technique is advantageously used when the sheet consists of
two-component fibres, for example fibres comprising at least two
grades of polyvinyl alcohol (PVA), the melting points or softening
points of which are different, these fibres being, for example,
co-extruded such that the fibre consists of at least a first grade
located at the core of the fibre and of at least a second grade
located at the periphery of the fibre, in the form of a sheath. The
bonding of the fibres may be facilitated when the sheath has a
melting point lower than that of the core.
[0067] The sheet of fibres may also be formed by carding fibres cut
to a length of 10 to 50 mm, followed by deposition of the fibres on
a conveyor where the sheet may then be consolidated by means of a
bonding technique as described above.
[0068] When the support comprises several layers, regardless of
whether or not all of the latter are made of water-soluble fibres,
the various layers can be assembled in many ways, for example by
seeding, bonding or sewing, and these layers can, where
appropriate, consist of one or more cavities containing one or more
cosmetic or dermatological compositions or several components of
the same cosmetic composition to be mixed extemporaneously. When
assembly is by sewing, a thread which is itself water-soluble may
be used, where appropriate.
[0069] When the support comprises several sheets of nonwoven, the
latter may be assembled in particular by heat-sealing at their
periphery so as to constitute a cushion capable of retaining, in an
inner cavity, a composition containing the gelling agent.
[0070] According to another aspect of the invention, the support is
free of adhesive, in particular of pressure-sensitive adhesive.
[0071] The density of the support may depend on the applications.
The support may, for example, have a density of less than or equal
to 0.1 g/cm.sup.3 or else greater than 0.1 g/cm.sup.3. According to
a preferred embodiment of the invention, the support has a density
of less than or equal to 0.1 g/cm.sup.3, better still ranging from
0.01 g/cm.sup.3 to 0.1 g/cm.sup.3, which makes it possible to have
a very aerated support which, as a result, dissolves more readily
in water.
[0072] The composition containing at least one water-soluble
gelling agent represents between 10 and 1000% by weight, relative
to the weight of the support, and preferably between 10 and 500% by
weight, relative to the weight of the support, the expression
"weight of the support" here being intended to mean the weight of
the support alone, without the weight of the composition containing
the water-soluble gelling agent. If the composition contains only
the water-soluble gelling agent, it is this which can represent
between 10 and 1000% by weight relative to the weight of the
support, and preferably between 10 and 500% by weight relative to
the weight of the support.
Water-soluble Gelling Agents
[0073] The composition carried by the support contains one or more
water-soluble gelling agents which swell in less than 30 seconds in
water at a temperature of 20.degree. C. to 30.degree. C. The
gelling agents contained in the composition carried by the support
can be chosen in particular from polysaccharides which swell in
less than 30 seconds in water at a temperature of 20.degree. C. to
30.degree. C., in particular gums which swell in less than 30
seconds in water at a temperature of 20.degree. C. to 30.degree.
C., modified starches, and mixtures thereof.
[0074] The expression "water-soluble gelling agents which swell in
less than 30 seconds in water at a temperature of 20.degree. C. to
30.degree. C." means gelling agents which dissolve or swell readily
in water at a temperature less than 30.degree. C., ranging, in
particular, from 20.degree. C. to 30.degree. C., and at a
concentration of from 5% to 50% by weight, so as to give a viscous
gel that does not run.
[0075] As water-soluble gelling agents, mention may in particular
be made of karaya gum, konjac gum, modified starches, and mixtures
thereof.
[0076] As modified starches, mention may, for example, be made of
those derived from maize starch, rice starch, cassava starch,
potato starch, wheat starch, sorghum starch, pea starch, and
mixtures thereof. Among modified starches, mention may be made of
precooked starches, hydrolysed starches, crosslinked starches, for
example crosslinked with a methylolurea derivative or with
octenylsuccinic anhydride or else with epichlorohydrin, esterified
starches, etherified starches, oxidized starches, refined starches,
starches roasted in the presence of an acid, or else grafted
starches, for example grafted with sodium poly-acrylates, coated
starches, for example coated with amino acids, and/or mixtures
thereof.
[0077] Among the modified starches that are particularly suitable
for the invention, mention may be made of: [0078] that sold under
the names Structure XL and Structure Zea (hydroxypropyl starch
phosphate) by the company National Starch; [0079] the
pregelatinized modified maize starch and potato starch sold,
respectively, under the names Novation 5600 and 6600, by the
company National Starch; [0080] the modified maize starches sold
under the names Ultra-tex 1, 2, HV, 2000, by the company National
Starch; [0081] the starches sold under the names Sanfresh ST-100C,
ST100MC, IM-300MC (INCI name sodium polyacrylate starch) by the
company Sanyo Chemical Industries; [0082] hydrolysed starches
grafted with acryloacrylamide/sodium acrylate copolymer (INCI name:
starch/acrylamide/sodium acrylate copolymer), such as those sold
under the names Water Lock A-240, A-180, B-204, D-223, A-100,
C-200, D-223 and G-400 by the company Grain Processing, [0083] and
mixtures thereof.
[0084] The amount of water-soluble gelling agent in the composition
can range, for example, from 5 to 100% by weight, better still from
10 to 100% by weight, and even better still from 20 to 100% by
weight relative to the total weight of the composition.
Compositions
[0085] The compositions carried by the support and containing the
water-soluble gelling agent(s) are preferably anhydrous
compositions. They are preferably in pulverulent or pasty form, and
more preferably in pulverulent form. They are compositions suitable
for topical application, in particular cosmetic or dermatological
compositions.
[0086] Thus, the compositions that can be used in the invention may
be, for example: [0087] lyophilized or atomized emulsions, such as
those described in document FR-A-2,727,312 or those based on
modified starch, described in document EP-A-0 938 892. These
emulsions are obtained by lyophilizing or atomizing an O/W emulsion
containing a pulverulent phase, producing milks or creams by mixing
with water when they are used. [0088] foaming compositions in the
form of powders, containing pulverulent surfactants, such as those
based on starch that are described in document EP-A-0 925 777,
producing foam by mixing with water when they are used. [0089]
exfoliating compositions containing scrubs or exfoliating
particles. [0090] compositions formed by simple mixing of the
constituents, the latter preferably being in powdered form.
[0091] The composition is preferably anhydrous but may optionally
contain a certain amount of water at the time it is impregnated
onto the support. However, so as to avoid premature solubilization
thereof, the water introduced onto the support during its
impregnation preferably is removed, for instance by heating.
Moreover, the composition may contain a certain amount of water,
which is generally bound water and which may come in particular
from the hygroscopic starting materials that contain water, such as
starches. The final amount of water in the composition present on
the article is preferably a maximum of 20% by weight, and more
preferably a maximum of 10% by weight, including 15, 12, 8, 6, 4, 2
and 0% by weight, relative to the total weight of the
composition.
[0092] In the case of a coloured composition, the article may be
packaged in a packaging comprising, where appropriate, a coloured
control representative of the colour of the composition obtained
after dissolving the article, in order to inform the consumer
before purchase.
[0093] When the composition is such that it is to be deposited on
the support by the user himself or herself, the composition and the
support can be provided in the form of a kit, for example. The
composition is, for example, provided in sufficient amount for it
to be possible to distribute a plurality of doses thereof on a set
of supports intended to be used successively.
Additives
[0094] The composition carried by the support can contain,
depending on the final use of the article, compounds other than the
water-soluble gelling agents.
[0095] These additives can in particular be anhydrous or in solid
form (powder). They can in particular be chosen from those
generally used in the cosmetics and dermatological fields, such as,
for example, surfactants, sequestering agents, fragrances,
antioxidants, active agents, preserving agents, dyestuffs (such as
hydrophilic pigments and dyes) and inorganic fillers and/or organic
fillers such as exfoliating particles and kaolin. These adjuvants
and also the amounts thereof must be such that they do not modify
the property desired for the composition of the invention.
According to one specific embodiment of the invention, these
additives may be encapsulated or adsorbed onto powders.
[0096] The surfactants may in particular be foaming surfactants. As
foaming surfactants, use may be made of those normally used in the
cosmetics field, it being possible for these surfactants to be
anionic, nonionic, cationic, amphoteric or zwitterionic.
[0097] The total amount of foaming surfactant(s) may range, for
example, from 2 to 80% by weight, preferably from 10 to 70% by
weight, and better still from 10 to 50% by weight relative to the
total weight of the composition.
[0098] As foaming anionic surfactants, mention may be made, for
example, of fatty acid salts that constitute soaps and that are
derived from a fatty acid having an alkyl chain containing from 6
to 22 carbon atoms, preferably from 8 to 18 carbon atoms; alkyl
sulphates and alkyl ether sulphates; sulphonates; alkali metal
salts of N-acylamino acids, such as sarcosinates, alaninates,
glutamates, aspartates, glycinates; and mixtures thereof.
[0099] As nonionic surfactants, mention may, for example, be made
of sugar esters, sugar ethers such as alkyl polyglucosides (APGs),
condensates of alkylene oxides and of alkylphenols, ethers of a
fatty alcohol and of polyols, and mixtures thereof.
[0100] As amphoteric or zwitterionic surfactants, mention may be
made of betaines and derivatives thereof, sultaines and derivatives
thereof, imidazolinium derivatives, and mixtures thereof.
[0101] The preferred surfactants are those in powdered form, such
as, for example, sodium lauryl sulphate, for instance the product
sold under the name Empicol LZ D by the company Allbright &
Wilson or under the name Tensopol USP97 by the company Tensachem;
cocamido-propylbetaine, for instance the product sold under the
name Tegobetain CK D by the company Degussa; sodium lauroyl
glutamate, for instance the product sold under the name Amisoft LS
11 by the company Ajinomoto; monosodium myristoyl glutamate, for
instance the product sold under the name Acylglutamate MS 11 by the
company Ajinomoto; the mixture of sodium laureth sulphate and
silica, sold under the name Texapon KE 2713 by the company Cognis;
disodium cocamido MEA-sulphosuccinate, for instance the product
sold under the name Mackanate CM 100 by the company MacIntyre;
sodium methyl cocoyl taurate, for instance the product sold under
the name Tauranol WSP by the company Finetex; sodium decyl
d-galactoside uronate, for instance the product sold under the name
Decyl d-galactoside uronate de sodium by the company Ard-Soliance;
the lauroyl methyl beta-alanine (acid form) sold under the name
LMA-H by the company Mitsui Toatsu; the
n-lauroyl-n-hydroxyethyl-beta-alanine sold under the name LHEA by
the company Mitsui Toatsu; the sodium cocoyl glycinate sold under
the name Amilite GCS-11 (F) by the company Ajinomoto; sodium cocyl
isethionate, for instance the product sold under the name Jordapon
CI P by the company BASF; sodium lauryl sulphoacetate, for instance
the product sold under the name Lathanol LAL poudre [powder] by the
company Stepan; potassium myristate, for instance the product sold
under the name Myristate de potassium (DUB MK) by the company
Stearinerie Dubois; potassium laurate, for instance the product
sold under the name Laurate de potassium (DUB LK) by the company
Stearinerie Dubois, and sucrose laurate, for instance the product
sold under the name Grilloten LSE 87 by the company Degussa.
[0102] The active agents can be chosen in particular from
keratolytic agents, moisturizers, soothing agents and antimicrobial
agents.
[0103] As moisturizers, mention may be made of polyols such as
glycerol; compounds that act on the barrier function, with a view
to maintaining moisturization of the stratum corneum, or occlusive
compounds, in particular ceramides, sphingoid-based compounds,
lecithins, glycosphingolipids, phospholipids, cholesterol and its
derivatives, phytosterols (stigmasterol, .beta.-sitosterol,
campesterol), essential fatty acids, 1,2-diacyl-glycerol,
4-chromanone, pentacyclic triterpenes such as ursolic acid,
petroleum jelly and lanolin; compounds that directly increase the
water content of the stratum corneum, such as threalose and its
derivatives, hyaluronic acid and its derivatives, glycerol,
pentane-diol, sodium pidolate, serine, xylitol, sodium lactate,
poly(glycerol acrylate), ectoin and its derivatives, chitosan,
oligosaccharides and polysaccharides, cyclic carbonates,
N-lauroylpyrrolidonecarboxylic acid, and
N-.alpha.-benzyl-L-arginine; and mixtures thereof.
[0104] As keratolytic agents, mention may be made of .beta.-hydroxy
acids, in particular salicylic acid and its derivatives (including
5-n-octanoylsalicylic acid); .alpha.-hydroxy acids, such as
glycolic acid, citric acid, lactic acid, tartaric acid, malic acid
or mandelic acid, and mixtures thereof.
[0105] As soothing agents that can be used in the composition
according to the invention, mention may, for example, be made of
pentacyclic triterpenes and extracts of plants (for example:
Glycyrrhiza glabra) containing same, for instance
.beta.-glycyrrhetinic acid and salts thereof and/or derivatives
thereof (glycyrrhetinic acid monoglucuronide, stearyl
glycyrrhetinate, 3-stearoyl-oxyglycyrrhetic acid), ursolic acid and
salts thereof, oleanolic acid and salts thereof, betulinic acid and
salts thereof, extracts of plants such as Paeonia suffruticosa
and/or lactiflora, Laminaria saccharina, Boswellia serrata,
Centipeda cunnighami, Helianthus annuus, Linum usitatissimum, Cola
nitida, Epilobium Angustifolium, Aloe vera, Bacopa monieri,
salicylic acid salts, and in particular zinc salicylate, canola
oil, bisabolol and extracts of camomile, allantoin, Sepivital EPC
(phosphoric diester of vitamin E and C) from Seppic, omega-3
unsaturated oils such as musk rose oil, blackcurrant oil, ecchium
oil or fish oil, plankton extracts, capryloylglycine, Seppicalm VG
(sodium palmitoylproline and Nymphea alba) from Seppic,
tocotrienols, piperonal, an extract of clove, phytosterols,
cortisone, hydrocortisone, indomethacin and betamethasone.
[0106] As antimicrobial agents, mention may, for example, be made
of 2,4,4'-trichloro-2'-hydroxydiphenyl ether (or triclosan),
3,4,4'-trichlorocarbanilide (or triclocarban), phenoxyethanol,
phenoxypropanol, phenoxyisopropanol, hexamidine isethionate,
metronidazole and its salts, miconazole and its salts,
itraconazole, terconazole, econazole, ketoconazole, saperconazole,
fluconazole, clotrimazole, butoconazole, oxiconazole
sulphaconazole, sulconazole, terbinafine, ciclopiroxe,
ciclopiroxolamine, undecylenic acid and its salts, benzoyl
peroxide, 3-hydroxybenzoic acid, 4-hydroxybenzoic acid, phytic
acid, N-acetyl-L-cysteine acid, lipoic acid, azelaic acid and its
salts, arachidonic acid, resorcinol, octopirox, octoxy-glycerol,
octanoylglycine, caprylyl glycol, 10-hydroxy-2-decanoic acid,
dichlorophenyl imidazole dioxolane and its derivatives described in
patent WO-A-93/18743, farnesol, phytosphingosines, and mixtures
thereof.
[0107] Vitamins that may be used include water-soluble or
liposoluble vitamins or provitamins, such as, for example, vitamin
A (retinol), vitamin C. (ascorbic acid), vitamin B3 or PP
(niacinamide), vitamin B5 (panthenol), vitamin B6 or pyridoxine,
vitamin E (tocopherol), vitamin K1, beta-carotene, and the
derivatives of these vitamins, and in particular esters thereof,
and mixtures thereof.
[0108] The composition may also contain exfoliants, in particular
for constituting an exfoliating composition or a facial scrub or
body scrub. As exfoliants, mention may, for example, be made of
exfoliating or scrubbing particles of inorganic, plant or organic
origin.
[0109] The composition according to the invention may also contain
one or more lipophilic compounds, fatty substances and, in
particular, oils, or oily active agent, provided that these
lipophilic compounds do not disturb the swelling of the gelling
agent. If they are present, the fatty substances can constitute up
to 50% of the composition carried by the support, for example from
0 to 50% by weight, preferably from 0.1 to 40% by weight, better
still from 0.1 to 20% by weight, and even better still from 0.5 to
10% by weight relative to the total weight of the composition.
These lipophilic compounds may contribute to having an article that
can be more readily rinsed off.
[0110] Of course, those skilled in the art would take care to
choose this or these possible additive(s) and/or the amount(s)
thereof in such a way that the advantageous properties
intrinsically associated with the composition in accordance with
the invention are not, or not substantially, impaired by the
addition(s) envisaged.
[0111] The article according to the invention constitutes in
particular a patch, and it can be used as a composition for
cleansing and removing makeup from the skin, for the treatment of
signs of ageing, for the treatment of greasy skin, for moisturizing
the skin, for scrubbing the skin, for sun protection and aftersun
treatment, and for the treatment of sensitive or sensitized
skin.
[0112] The article according to the invention can constitute in
particular a rinse-off patch or a rinse-off two-in-one article for
the specific treatment of a restricted area, or as a single-dose
product to be applied to a larger area, having moistened the
product beforehand.
[0113] It is generally used by moistening the area to be treated
and applying the patch thereto, the patch converting into a gel,
and then removing it by simply rinsing.
[0114] The article according to the invention may find applications
in care in general, for example for cleansing and removing makeup
from the skin, for the treatment of signs of ageing, for the
treatment of greasy skin, for moisturizing the skin, for scrubbing
the skin (including peelings), for sun protection and aftersun
treatment, and also for the treatment of sensitive or sensitized
skin.
[0115] The article according to the invention may in particular
constitute a cleansing product for the skin, an exfoliating product
or a skin care product.
[0116] The examples which follow serve to illustrate the invention
without, however, being limiting in nature. The amounts are
indicated as % by weight unless otherwise mentioned, and they
correspond, unless otherwise mentioned, to the amount of starting
material and not to the amount of active material. The names of the
compounds used are given as the CTFA name, as the chemical name or
as the trade name.
EXAMPLES
[0117] The article used in the examples is prepared with a support
made of PVA-based Kuralon K-II WN2 fibres. It is obtained by
heat-sealing, at their periphery, two layers having a weight of 80
g/m.sup.2. The article is in the form of a disc 3 cm in diameter,
comprising a cavity into which is introduced the composition in an
amount of approximately 0.3 grams. TABLE-US-00001 Example 1 Example
2 Example 3 according according according to the Comparative to the
to the invention example invention invention Modified starch (1)
100 -- 80 -- Polyacrylate- -- -- -- 69 grafted starch (2) AMPS
polymer -- 100 -- -- Glycolic acid -- -- 20 -- Kaolin -- -- -- 10
Triclosan -- -- -- 1 Sodium lauroyl -- -- -- 20 glutamate (4) (1)
Structure XL (National Starch) (2) Sanfresh ST-100C (Sanyo Chemical
Industries) (3) Hostacerin AMPS (Clariant) (4) Aminosoft LS11
(Ajinomoto)
[0118] The examples were obtained by mixing the powders, and then
by introducing approximately 0.3 grams of the mixture into the
cavity of the support, which was then closed by sealing.
[0119] For all the examples, the article is moistened beforehand
with an amount of water greater than or equal to 2 ml, before being
applied to the area to be treated. In the 3 examples according to
the invention, a gel is obtained in less than 30 seconds, whereas
the comparative example gives a fluid solution.
[0120] The patch of Example 2 constitutes a peeling: after the
addition of approximately 2 ml of water, it is applied to the skin,
and it is then rinsed off after a leave-on time of approximately 5
minutes.
[0121] The patch of Example 3 constitutes a care for greasy skin to
be rinsed after application. It can be used as a concentrated care
to be applied to the area of the nose for 5 minutes after having
been rehydrated with approximately 2 ml of water, or as a daily
cleansing product after dilution with a larger amount of water
(more than 4 ml of water).
[0122] The above written description of the invention provides a
manner and process of making and using it such that any person
skilled in this art is enabled to make and use the same, this
enablement being provided in particular for the subject matter of
the appended claims, which make up a part of the original
description and including an article, in particular a cosmetic or
dermatological article, comprising a support in the form of at
least one sheet comprising fibres that are water-soluble at a
temperature less than or equal to 30.degree. C., and a composition
carried by the support, containing at least one water-soluble
gelling agent which swells in less than 30 seconds in water at a
temperature of 20.degree. C. to 30.degree. C.
[0123] As used herein, the phrases "selected from the group
consisting of," "chosen from," and the like include mixtures of the
specified materials. Terms such as "contain(s)" and the like as
used herein are open terms meaning `including at least` unless
otherwise specifically noted.
[0124] All references, patents, applications, tests, standards,
documents, publications, brochures, texts, articles, etc. mentioned
herein are incorporated herein by reference. Where a numerical
limit or range is stated, the endpoints are included. Also, all
values and subranges within a numerical limit or range are
specifically included as if explicitly written out.
[0125] The above description is presented to enable a person
skilled in the art to make and use the invention, and is provided
in the context of a particular application and its requirements.
Various modifications to the preferred embodiments will be readily
apparent to those skilled in the art, and the generic principles
defined herein may be applied to other embodiments and applications
without departing from the spirit and scope of the invention. Thus,
this invention is not intended to be limited to the embodiments
shown, but is to be accorded the widest scope consistent with the
principles and features disclosed herein.
* * * * *