Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2000-06-30
2002-05-07
Gupta, Yogendra N. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C134S040000, C510S130000, C424S059000, C424S061000, C424S064000, C424S401000
Reexamination Certificate
active
06383998
ABSTRACT:
The present invention relates to a process for removing make-up from the skin or for cleansing the skin, in particular the face, using an anhydrous or aqueous cosmetic composition which comprises at least one volatile fluoro compound. More particularly, the present invention relates to the use of a composition in the form of a make-up-removing milk, cream, or oil. The invention also relates to a cosmetic composition in the form of a water-in-oil (W/O) or oil-in-water (O/W) emulsion.
The removal of make-up essentially involves dissolving and removing all the traces of make-up as well as the impurities accumulated on the face originating from atmospheric pollution. It is important, during make-up removal, to cleanse the skin well without attacking it.
The removal of make-up is usually carried out with the aid of fluid products based on surfactants, generally in aqueous solution or in the form of an emulsion. Although these make-up-removing products allow good removal of standard “non-waterproof” make-up, they nevertheless can have the drawback of drying out the skin by removing its natural hydrolipid film, and of causing certain skin irritations, particularly on the most sensitive parts of the face such as the eyelids, around the eyes, and the lips. Make-up-removing products based on detergent surfactants can thus be disadvantageous for the removal of make-up from sensitive and delicate skin.
On the other hand, make-up of the “waterproof” type requires the use of specific make-up-removing agents which comprise an oil, such as, for example, liquid petroleum jelly in combination with fatty esters. However, these make-up-removing products have disadvantages on application, such as a greasy sensation on the skin, which are such that, when they are not essential, it is preferred to use standard make-up-removing products even though these standard products may lack efficacy.
After extensive studies on various types of compounds, it has now been found, surprisingly and unexpectedly, that the use of certain volatile fluoro compounds in such compositions makes it possible to afford particularly high-quality make-up-removing properties, while at the same time imparting the effect of freshness after application. Furthermore, it has been found that when these make-up-removing compositions are in the form of an emulsion, they can be advantageously formulated in the presence of a small proportion of a detergent surfactant without thereby impairing their make-up-removing power, consequently making it possible to obtain better cosmetic properties in terms of pleasantness and comfort. Another particularly appreciable advantage of these novel compositions lies in the fact that they can be capable of removing the various types of make-up, e.g. waterproof, non-waterproof, and “transfer-resistant” make-up, and of doing so under highly satisfactory conditions.
A subject of the present invention is thus a process for removing make-up from or for cleansing the skin, using an anhydrous or aqueous composition, wherein the composition comprises at least one volatile fluoro compound in an amount of at least 0.5% by weight, relative to the total weight of said composition.
According to the invention, the volatile fluoro compound is preferably present in the composition in an amount of at least 5%, more preferably from 5 to 80%, and even more preferably from 8 to 70% by weight relative to the total weight of the composition.
The volatile fluoro compounds which can be used according to the invention and which may be of oily type are preferably chosen from the following:
1) Perfluorocycloalkyls corresponding to formula (I):
in which:
n is 3, 4or 5,
m is 1 or 2, and
p is 1, 2 or 3,
with the proviso that when m=2, the groups (CF—(CF
2
)
p
—F) are not necessarily alpha to each other;
2) Perfluoroalkanes corresponding to formula (II):
CF
3
—(CF
2
)
m
—CF
2
X (II)
in which:
m is 2 to 8, and
X is chosen from Br or F;
3) Fluoroalkyls and heterofluoroalkyls corresponding to formula (III):
CH
3
—(CH
2
)—(Z)
t
—X—CF
3
(III)
in which:
t is 0 or 1,
n is 0, 1, 2 or 3,
X is chosen from linear and branched perfluoroalkyl radicals containing from 2 to 5 carbon atoms, and
Z is chosen from O, S, or NR, wherein R is chosen from hydrogen and the radicals —(CH
2
)
n
—CF
3
and —(CF
2
)
m
—CF
3
, wherein m is 2, 3, 4, or 5, and
4) Perfluoromorpholine derivatives corresponding to formula (IV):
in which:
R is a C
1
-C
4
perfluoroalkyl radical.
Among the perfluorocycloalkyls of formula (I) useful according to the invention are, for example, perfluoromethylcyclopentane and perfluoro-1,3-dimethylcyclohexane, which are sold under the names “Flutec PC1®” and “Flutec PC3®” by the company BNFL Fluorochemicals Ltd., and perfluoro-1,2-dimethylcyclobutane.
Among the perfluoroalkanes of formula (II) useful according to the invention are, for example, dodecafluoropentane and tetradecafluorohexane, which are sold under the names “PF5050®” and “PF5060®” by the company 3M, or alternatively, bromoperfluorooctyl sold under the name “Foralkyl®” by the company Atochem.
Among the fluoro compounds of formula (III) useful according to the invention are, for example, nonafluoromethoxybutane sold under the name MSX 4518®” by the company 3M, and nonafluoroethoxyisobutane.
Finally, among the perfluoromorpholine derivatives of formula (IV) useful according to the invention is, for example, is 4-trifluoromethylperfluoromorpholine, sold under the name “PF5052®” by the company 3M.
The fluoro compounds described above are further characterized by their high density, which is generally greater than 1, and preferably greater than 1.2, by a saturating vapour pressure at 25° C., at least equal to 50 Pa, and by a boiling point generally from 25 to 65° C.
When, according to the invention, an anhydrous composition is used, it is essentially an oil, and the volatile fluoro compound is present either in soluble form or in a form which is finely dispersed in at least one cosmetic oil.
Among the non-fluoro oils which are miscible with the volatile fluoro compound, are, for example, polysiloxanes, in particular PDMSs, especially volatile ones such as cyclopentasiloxane and cyclohexasiloxane, volatile hydrocarbon-based oils, particularly C
11
-C
13
isoparaffins, and isododecane.
Among the non-fluoro oils which are immiscible with the volatile fluoro compound, are, for example, fatty acid esters containing at least 6 carbon atoms, which are preferably obtained from a linear and branched C
1
-C
17
alcohol and from a linear and branched C
6
-C
22
fatty acid, preferably a fatty mono- or diacid. Among these esters, mention may be made of 2-ethylhexyl palmitate, 2-ethylhexyl myristate, isopropyl palmitate, isopropyl myristate, diisopropyl adipate, dioctyl adipate, 2-ethylhexyl hexanoate, ethyl laurate, methyl myristate, octyldodecyl octanoate, isodecyl neopentanoate, ethyl myristate, myristyl propionate, 2-ethylhexyl 2-ethylhexanoate, 2-ethylhexyl octanoate, 2-ethylhexyl caprate/caprylate, methyl palmitate, butyl myristate, isobutyl myristate, ethyl palmitate, isohexyl laurate, hexyl laurate, isopropyl isostearate, and mixtures thereof.
According to this embodiment, the concentration of volatile fluoro compound is generally from 20 to 80%, and preferably from 30 to 65%, relative to the total weight of the composition when it is in the form of oil.
When an aqueous cosmetic composition is used according to the invention, it is in the form of multiple emulsions, but preferably in the form of a W/O or O/W emulsion containing a fatty phase, an aqueous phase, and optionally a surfactant, wherein the fatty phase contains the volatile fluoro compound.
The emulsions constitute a preferred embodiment for removing make-up from the skin and for cleansing the skin. The emulsions preferably contain, relative to the total weight of the emulsion, from 2 to 70%, but preferably from 5 to 30%, fatty phase by weight, and from 30 to 98%, but preferably from 70 to 95%, aqueous phase by weight. The amount of volatile fluoro compound in the fatty phase generally r
Gupta Yogendra N.
L'Oreal
Webb Gregory E.
LandOfFree
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