U.S. patent application number 09/737355 was filed with the patent office on 2001-07-05 for multilayered foaming spray product.
Invention is credited to Lyle, Ian Gardner.
Application Number | 20010006088 09/737355 |
Document ID | / |
Family ID | 10866593 |
Filed Date | 2001-07-05 |
United States Patent
Application |
20010006088 |
Kind Code |
A1 |
Lyle, Ian Gardner |
July 5, 2001 |
Multilayered foaming spray product
Abstract
A packaged product for dispensing a foamable liquid cleansing
composition in the form of a mousse comprising a sealed container
having a mechanically operable dispensing means which dispenses the
cleansing composition as a mousse; and a multi-phase cleansing
composition in the sealed container comprising by weight of the
composition (a) a first aqueous phase including from 5 to 30% by
weight of the total composition of an anionic surfactant, an
amphoteric surfactant, a non-ionic surfactant, a cationic
surfactant, or a mixture thereof; (b) a second phase including from
10 to 80% by weight of the total composition of a water immiscible
skin benefit agent, which undispensed cleansing composition
separates into visually distinct phases on standing.
Inventors: |
Lyle, Ian Gardner; (Hamburg,
DE) |
Correspondence
Address: |
UNILEVER
PATENT DEPARTMENT
45 RIVER ROAD
EDGEWATER
NJ
07020
US
|
Family ID: |
10866593 |
Appl. No.: |
09/737355 |
Filed: |
December 15, 2000 |
Current U.S.
Class: |
156/145 |
Current CPC
Class: |
A61K 8/922 20130101;
A61K 8/03 20130101; A61K 8/44 20130101; A61K 8/442 20130101; A61K
8/925 20130101; A61K 8/463 20130101; A61K 8/375 20130101; A61K 8/89
20130101; A61Q 19/10 20130101; A61K 8/046 20130101; A61K 8/55
20130101; A61K 8/37 20130101; A61K 8/31 20130101 |
Class at
Publication: |
156/145 |
International
Class: |
A63B 039/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 17, 1999 |
GB |
9929969.5 |
Claims
1. A packaged product for dispensing a foamable liquid cleansing
composition in the form of a mousse comprising a sealed container
having a mechanically operable dispensing means which dispenses the
cleansing composition as a mousse; and a multi-phase cleansing
composition in the sealed container comprising by weight of the
composition (a) a first aqueous phase comprising from 5 to 30% by
weight of the total composition of an anionic surfactant, an
amphoteric surfactant, a non-ionic surfactant, a cationic
surfactant, or a mixture thereof; (b) a second phase comprising
from 10 to 80% by weight of the total composition of a water
immiscible skin benefit agent, which undispensed cleansing
composition separates into visually distinct phases on
standing.
2. A packaged product as claimed in claim 1 wherein the multiphase
product is a two phase product.
3. A packaged product as claimed in claim 1 or claim 2 wherein the
anionic surfactant is chosen from sodium lauryl ether sulphate 2EO,
sodium lauryl ether sulphate 3EO, ammonium lauryl sulphate,
ammonium lauryl ether sulphate 1EO, ammonium lauryl ether sulphate
2EO, ammonium lauryl ether sulphate 3EO, acyl isethionates, alkyl
phosphates, or mixtures thereof.
4. A packaged product as claimed in claim 3 wherein the composition
includes 5 to 30% by weight, preferably 10 to 20% by weight, of
sodium lauryl ether sulphate 2EO.
5. A packaged product as claimed in any one of the preceding claims
wherein the amphoteric surfactant is a C.sub.8-C.sub.18 alkyl
amidopropylbetaine, a C.sub.8-C.sub.18 alkyl betaine, a
C.sub.8-C.sub.18 alkyl mono- or di-alkanolamide, or a mixture
thereof.
6. A packaged product as claimed in claim 5 wherein the composition
includes 0.1 to 20% by weight, preferably 1 to 10% by weight, of
cocamidopropyl betaine.
7. A packaged product as claimed in any one of the preceding claims
wherein the composition contains a nonionic surfactant.
8. A packaged product as claimed in claim 7 wherein the composition
includes 0.1 to 10% by weight, preferably 0.1 to 3% by weight, of a
nonionic surfactant.
9. A packaged product as claimed in any one of the preceding claims
wherein the water immiscible skin benefit agent is a vegetable oil,
a mineral oil, a silicone oil, an animal oil, a triglyceride of a
fatty acid and/or a fatty alcohol, an ester of a fatty acid and/or
a fatty alcohol, or a mixture thereof.
10. A packaged product as claimed in claim 9 wherein the
composition includes 5 to 80% by weight, preferably 10 to 50% by
weight, of a soybean oil, a mineral oil, or a mixture thereof.
11. A packaged product as claimed in any one of the preceding
claims wherein the composition can be shaken to form a crude
emulsion prior to use.
12. A packaged product according to claim 11, wherein the crude
emulsion has a particle size of 10-1000 microns.
13. A packaged product according to claim 11 or claim 12, wherein
the crude emulsion separates on standing into two distinctive
layers within a period of 2 hours.
14. A packaged product as claimed in any one of the preceding
claims wherein the second phase containing the water immiscible
skin benefit agent phase comprises one third to two thirds by
weight of the packaged composition.
15. A packaged product according to any of the preceding claims,
wherein the composition contains a dye which is soluble in one
phase but not the other(s).
16. A packaged product according to any of claims 1-15, wherein the
composition comprises two dyes, each being soluble in one phase but
not the other(s).
17. A packaged product as claimed in any one of the preceding
claims wherein the composition further includes 0 to 5% by weight
of a perfume, a colouring agent, a preservative, a thickener, an
antioxidant, or a mixture thereof.
18. A packaged product as claimed in any one of the preceding
claims comprising 20-60 wt % water.
19. A packaged product as claimed in any one of the preceding
claims wherein the composition is packaged in a transparent or
translucent container.
20. A packaged product according to any of the preceding claims,
wherein the aqueous phase contains a material which increases the
density of the aqueous phase.
21. A packaged product according to claim 21, wherein the
composition contains up to 50 wt % glycerol, polyethylene glycol or
sorbitol.
23. A method of dispensing a foamable liquid cleansing composition
comprising: providing a sealed container having a mechanically
operable dispensing means and containing a two-phase cleansing
composition as claimed in any one of the preceding claims in the
container; and mechanically operating the dispensing means.
Description
[0001] The present invention relates to a packaged product
containing a liquid cleansing composition, in particular a packaged
multilayered aqueous foamable cleansing composition including a
water insoluble oil or emollient skin benefit agent for use as a
shower product.
[0002] It is desirable that skin cleansing compositions not only
clean the body but also have a skin caring and/or moisturising
effect on the human skin. The skin caring effect is typically
achieved by including an emollient/oil in the composition.
[0003] The problem of providing a shower formulation containing
relatively high levels of oils which displays the required
cleansing, foaming and skin caring action has long been recognised,
because typically lather formation is inhibited by increasing the
proportion of the water immiscible skin benefit agent in the
composition.
[0004] In addition, it is also appreciated that problems may be
encountered in incorporating relatively high levels of oil in
aqueous compositions. A relatively high level of oil in the product
is desirable so as to provide a high level of cosmetic benefit in
the composition. It is also desirable that any such oil droplets
should be relatively large, for example typically having a diameter
in the region 0.1-0.5 mm or more, to optimise the benefit delivery
to the skin. Compositions containing relatively high levels of oil
benefit agent, and in addition having the oil in the form of
relatively large droplets in e.g. a course emulsion may in certain
circumstances deposit relatively high levels of oil, compared to
e.g. similar levels of oil in a product which is in the form of a
stable emulsion, which will typically contain smaller size oil
droplets. This may be because the oil in a stable emulsion with
relatively small droplets may be relatively quickly washed off.
[0005] A disadvantage of such compositions having relatively high
levels of oil is that they can be difficult to formulate to provide
products which have a homogenous appearance. To do this requires
reliance on emulsion technology, but even then the inclusion of
high levels of oil into compositions can be difficult to achieve.
As such, products which readily split into two visually distinct
phases on standing are known.
[0006] Known products such as bath foams typically comprise an
aqueous phase and a hydrophobic phase packaged in a simple
container, and are intended to be shaken together just prior to
dispensing to provide a course emulsion.
[0007] It is also desirable that a cleansing formulation for use in
the shower does not run out of the hands after it is dispensed from
a container, and is more easy to manipulate. However, when the
composition includes high levels of an oil/emollient, it is more
difficult to thicken the composition using conventional thickening
agents, and more complicated formulations are typically employed.
Commercially acceptable shower gels typically have viscosities in
the region 1,000-10,000, more conveniently 2,000-5,000 mPa.s.,
measured at a shear rate of 4.5 sec.sup.-1 at a temperature of
30.degree. C.
[0008] Accordingly, there is a need for providing an improved
foamable oil or skin benefit agent containing cleansing product,
such as e.g. a shower oil product which overcomes the
aforementioned problems of previous products.
[0009] Thus, according to a first aspect, the present invention
provides a packaged product for dispensing a foamable liquid
cleansing composition in the form of a mousse comprising a sealed
container having a mechanically operable dispensing means which
dispenses the cleansing composition as a mousse; and a multi-phase
cleansing composition in the sealed container comprising by weight
of the composition (a) a first aqueous phase including from 5 to
30% by weight of the total composition of an anionic surfactant, an
amphoteric surfactant, a non-ionic surfactant, a cationic
surfactant, or a mixture thereof; (b) a second phase including from
10 to 80% by weight of the total composition of a water immiscible
skin benefit agent, which undispensed cleansing composition
separates into visually distinct phases on standing.
[0010] Where percentages of compositions are quoted in this
specification, all percentages are quoted as percentages by weight
of the total cleansing composition, unless otherwise stated.
[0011] Conveniently the multi-phase products according to the
invention have two phases, though higher numbers of phases such as
e.g. three are contemplated.
[0012] By the term "multi-phase" we mean that the cleansing
composition forms two or more distinct phases, which are typically
visually distinct layers and which may have a visually distinct
interface, after standing for a relatively short period of time.
Typically phase separation occurs after a period of 5-10 minutes,
though separation can take longer, such as from 30 minutes to
period of several (e.g. at least 2, and possibly 20) hours. As
such, the compositions can be regarded as unstable, though prior to
dispensing, the multi-phase composition is shaken to provide a
crude emulsion. The individual separated phases of the product can
be clear or turbid.
[0013] It is also to be understood within the context of the
invention that a single phase of the product may in fact itself
comprise a number of different phases in the form of a stable
emulsion, but if this the case, this emulsion phase will be
kinetically stable, and does not separate on standing. This is in
contrast to the multi-phase product of the invention, which forms a
crude and unstable emulsion on shaking which is not kinetically
stable, and which readily separates as described above into what
may be regarded as stable individual phases of the packaged
product.
[0014] Where the composition is a two phase product, the weight
ratio of the first aqueous surfactant containing phase to the
second water immiscible skin benefit agent containing phase is
preferably in the region of 1:4 to 4:1, and conveniently in the
region 1:2 to 2:1. In certain embodiments, the preferred weight
ratio between the two phases may be approximately 1:1.
[0015] This may provide the product with a particularly interesting
appearance, especially if one phase contains a dye which is not
soluble in the other phase, or each phase includes a different
coloured dye which is not soluble in the other phase, and in either
case the dispensing container is transparent or translucent (but
preferably transparent).
[0016] By the term "mechanically operable", we mean that the
container does not use liquifiable gas propellants, such as butane,
for dispensing the composition but the container includes a pump
activated dispensing means, such as a finger pump, which in use
mixes air with the cleansing composition during dispensing.
Alternatively, the container may be in the form of a squeeze
bottle, provided the dispensed product is in the form of a
mousse.
[0017] Preferably, the dispensing means mixes 1 part by volume of
the composition with between about 4 and 20 parts by volume of air,
more preferably about 5-12 parts of air, even more preferably 1
part of the composition with to about 5 to 8 parts of air, and
delivers the cleansing composition as a mousse which may generate a
foam on washing, but which can also readily be spread over the
user's skin.
[0018] The dispensing means may also preferably include an integral
filter mesh for increased foaming of the composition.
[0019] A suitable mechanically operable dispensing means includes
the F2 Finger Pump Foamer available from Air Spray International of
BV Zuiderkade 31 to 33, PO Box 389, 1940 A J Beverwijk, The
Netherlands. Alternatively, a suitable squeeze bottle is
illustrated in EP-A-728,475 (Kao) the contents of which (in as far
as they relate to the description of squeeze bottle) are
incorporated by reference.
[0020] In use, prior to dispensing the packaged product is shaken
to mix the upper water immiscible skin benefit agent phase with the
lower surfactant phase, thus ensuring the user receives a "fresh"
mixture of surfactant and benefit agent in the form of a course
emulsion. The dispensing means is then actuated, and a mousse is
dispensed from the container. The mousse provides improved
lathering, it has a more manipulable form to prevent egress through
the fingers, and it may deliver useful quantities of the water
immiscible skin benefit agent for providing the desired skin caring
effect.
[0021] The composition of the present invention includes a water
immiscible skin benefit agent phase for providing a skin benefit
effect. The water immiscible skin benefit agent phase is typically
a hydrophobic liquid such as an oil at ambient temperature, and may
consist entirely of the hydrophobic liquid, or an oil in water
emulsion of a water immiscible skin benefit agent, or combination
of such agents. An emulsion in this context may be prepared by
mechanical mixing or temporarily emulsifying the water immiscible
skin benefit agent phase with the aqueous surfactant containing
phase, optionally with an emulsifier to facilitate the temporary
crude emulsification, or by a combination of mechanical and
chemical emulsification.
[0022] Suitable water immiscible skin benefit agents include:
[0023] a) hydrocarbon oils such as mineral oil, liquid paraffin,
petrolatum, polydecene, polyisobutene, squalane and squalene;
[0024] b) vegetable oils such as almond oil, arachis oil, avocado
oil, castor oil, coconut oil, corn oil, cotton seed oil, evening
primrose oil, jojoba oil, macadamia nut oil, olive oil, palm oil,
palm kernel oil, safflower oil, rapeseed oil, sesame seed oil,
sunflower seed oil, soybean oil;
[0025] c) waxes such as beeswax, carnauba wax, microcrystalline
wax; d) mono-, di- and triglycerides such as glyceryl laurate,
glyceryl ricinoleate, glyceryl stearate, glyceryl isostearate,
glyceryl dilaurate, glyceryl distearate, glyceryl tricaprate,
glyceryl tricaprylate, glyceryl trilaurate, glyceryl trioctanoate,
glyceryl trioleate, glyceryl tri(2-ethylhexanoate), glyceryl
tristearate;
[0026] e) higher fatty alcohols such as lauryl, myristyl, cetyl,
stearyl, isostearyl, oleyl and behenyl alcohols;
[0027] f) higher fatty acids such as lauric, myristic, palmitic,
stearic, isostearic, oleic, linoleic, linolenic and behenic
acids;
[0028] g) esters such as isopropyl myristate, isopropyl palmitate,
isopropyl isostearate, butyl myristate, isobutyl palmitate, hexyl
laurate, cetyl palmitate, isocetyl stearate, decyl oleate, myristyl
lactate, cetyl lactate, octyl methoxycinnamate, propylene glycol
laurate, propylene glycol stearate, propylene glycol dicaprylate,
propylene glycol diisostearate; and sucrose esters;
[0029] h) silicone oils, gums and modifications thereof such as
linear and cyclic polydimethylsiloxanes, amino-, alkyl-, alkylaryl-
and aryl-silicones;
[0030] i) lipid materials of natural origin such as phospholipids,
ceramides, cholesterol and derivatives thereof, lanolin, lanolin
alcohol and derivatives thereof, lard, mink oil and tallow;
[0031] and mixtures of any of the foregoing materials.
[0032] Examples of preferred oils for use in the water immiscible
skin benefit agent phase are soybean oil and/or a mineral oil.
[0033] The water immiscible skin benefit agent is generally used in
an amount from about 10 to 80%, preferably 10 to 60%, optionally 20
to 50% by weight of the total composition. The water immiscible
skin benefit agent may comprise a mixture of the aforementioned
agents. The water immiscible skin benefit agent may also be solid
at room temperature, provided it dissolves appropriately to form a
solution in the hydrophobic phase. It is specifically contemplated
that the water immiscible skin benefit agent may comprise up to
100% by weight of the second phase.
[0034] The water immiscible skin benefit agent may typically have a
droplet size of 10-1000 microns in the crude temporary emulsion
formed by shaking before use.
[0035] The composition according to the invention also comprises 5
to 30%, and preferably at least 10% by weight of the total
composition of an anionic, nonionic, amphoteric or cationic
surfactant or mixtures thereof.
[0036] Suitable anionic surfactants are soaps, alkyl phosphates,
acyl isethionates, alkyl sulphates, alkyl ether sulphates, alkyl or
aryl sulphonates, alkyl succinates, alkyl sulphosuccinates,
N-alkoyl sarcosinates, and alpha-olefin sulphonates, especially
their sodium, potassium, magnesium, ammonium and mono-, di- and
triethanolamine salts. The alkyl groups generally contain from 8 to
18 carbon atoms and may be unsaturated. The alkyl ether sulphates
may contain from one to 10 ethylene oxide or propylene oxide units
per molecule, and preferably contain 2 to 3 ethylene oxide units
per molecule.
[0037] Examples of suitable anionic surfactants include sodium
lauryl sulphate, optionally with 2-5 EO, sodium oleyl succinate,
ammonium lauryl sulphosuccinate, ammonium lauryl sulphate, sodium
dodecylbenzene sulphonate, triethanolamine dodecylbenzene
sulphonate and sodium N-lauryl sarcosinate. Conveniently, the
anionic surfactant is chosen from sodium lauryl sulphate, sodium
lauryl ether sulphate 2EO and 3EO, ammonium lauryl sulphate and/or
ammonium lauryl ether sulphate 1EO, 2EO and 3EO, acyl isethionates,
and alkyl phosphates. Particularly preferred embodiments of the
invention may contain 5 to 30% by weight, preferably 10 to 20% by
weight of the total composition of sodium lauryl ether sulphate 2
EO or 3 EO.
[0038] The nonionic surfactants suitable for use in the composition
of the invention may include condensation products of aliphatic
(C.sub.8-C.sub.18) primary or secondary linear or branched chain
alcohols or phenols with alkylene oxides, usually ethylene
oxide.
[0039] Other suitable nonionics include alkyl polyglucosides, a
specific example of which is coco diglucoside. Preferably, the
nonionic surfactant is present at a concentration of 0.1 to 10%,
more preferably 0.1 to 3% by weight of the total composition.
[0040] The amphoteric surfactants suitable for use in the
composition of the invention may include alkyl amine oxides, alkyl
betaines, alkyl amidopropyl betaines, alkyl mono- or
dialkanolamides, alkyl sulphobetaines, alkyl glycinates and alkyl
carboxyglycinates, wherein the alkyl groups have from 8 to 18
carbon atoms. Examples include lauryl amine oxide, coco mono- or
di-ethanolamide, coco mono isopropanolamide, cocamidopropyl
betaine, cocodimethyl sulphopropyl betaine and coco-betaine.
Particularly preferred embodiments may contain 1-10% by weight of
the total composition of an amphoteric surfactant, and in
particular 1-10% by weight of the total composition of
cocamidopropylbetaine.
[0041] Conveniently the composition may contain up to about 50 wt
%, more preferably 5 to 30 wt % of the total composition of a
material which may act to increase the density of the aqueous
(surfactant containing) phase. Suitable materials include short
chain polyhydric alcohols such as glycerol or sorbitol, or
polyethylene glycols (typically having a MW of 1000 to 100,000).
These have the effect of increasing the density difference between
the aqueous and oil/emollient phases, thereby facilitating the
separation between the two phases on standing, and may also
contribute some humectant properties to the composition.
[0042] Compositions according to the invention also contain water,
typically at levels of 10-75 wt %, more preferably 20-60 wt % of
the total composition.
[0043] The cleansing composition may also include minor amounts of
other ingredients such as a perfume, a colouring agent, a
preservative, a thickener, an antioxidant or mixtures thereof,
typically in amounts of from 0 to 5% by weight of the total
composition.
[0044] The invention is further illustrated by way of example only
with reference to the following drawing and examples, in which FIG.
1 represents an exploded drawing of suitable mechanically operable
spray device for use in compositions according to the
invention.
[0045] FIG. 1 shows a spray device (F2 Finger Pump Foamer, ex. Air
Spray International) which is conveniently and readily attached to
a supply container (not shown), which is preferably transparent,
containing the composition to be dispensed. Spray device contains
components 1-16 which combine as indicated in the exploded diagram,
and co-operate in the conventional manner to dispense liquid
contained in the supply container in the form of a mousse.
Components shown in FIG. 1 are;
[0046] 1. Polypropylene over cap
[0047] 2. Polypropylene nozzle
[0048] 3. PET mesh 2
[0049] 4. Polypropylene netholder
[0050] 5. PET mesh 1
[0051] 6. Polypropylene base cap
[0052] 7. High density polyethylene air piston
[0053] 8. Low density polyethylene blend valve
[0054] 9. Polypropylene inner rod
[0055] 10. High density polyethylene liquid piston
[0056] 11. Stainless steel spring
[0057] 12. Polypropylene plug
[0058] 13. Stainless steel ball
[0059] 14. Polypropylene cylinder
[0060] 15. Tri-seal gasket
[0061] 16. Polyethylene dip tube
[0062] Particularly significant features of this embodiment of
spray dispenser are the meshes 3 and 5, which when the liquid
composition is forced through them generate a fine porous foam.
[0063] Preferred hardware for use in products according to the
invention has a volume ratio of product:air of approximately 1:5 to
1:12, more preferably about 1:5 to 1:8.
[0064] A suitable composition which forms a crude emulsion on
shaking, but otherwise separates into two visibly distinct phases
on standing, is as follows;
1 Component % wt Sodium laureth sulphate 15.0 Cocoamidopropyl
betaine 3.0 Citric acid 0.2 PEG-120 methyl glucose dioleate 0.2
Sodium benzoate 0.4 Water soluble dye 0.02 Perfume 0.8 Soyabean oil
12.5 Mineral oil 12.5 Water to 100
* * * * *