Cleaning and liquid contact with solids – Processes – Miscellaneous
Reexamination Certificate
1999-05-17
2002-12-03
Gupta, Yogendra N. (Department: 1751)
Cleaning and liquid contact with solids
Processes
Miscellaneous
C510S122000, C510S125000, C510S127000, C510S129000, C510S136000, C510S159000, C510S405000, C510S466000, C510S481000, C510S504000, C424S070120, C424S070190, C424S070210, C424S070240, C424S070280, C424S450000, C514S938000, C252S301500, C252S391000
Reexamination Certificate
active
06488780
ABSTRACT:
The present invention relates to new cosmetic compositions with improved properties intended simultaneously for cleaning and for conditioning keratinous substances, such as hair, and comprising, in a cosmetically acceptable aqueous vehicle, a washing base composed of surface-active agents with a detergent power in which is also present, as conditioning agent, a nanoemulsion defined below. The invention also relates to the use of the said compositions in the abovementioned cosmetic application.
Detergent compositions (such as shampoos) based essentially on conventional surface-active agents of, in particular, anionic, non-ionic and/or amphoteric type, but more particularly of anionic type, are commonly used for cleaning and/or washing keratinous substances, such as hair. These compositions are applied to wet hair and the foam generated by massaging or rubbing with the hands makes it possible, after rinsing with water, to remove the various types of dirt initially present on the hair.
These base compositions certainly have a good washing power but the intrinsic cosmetic properties which are attached to them remain fairly weak, however, in particular because of the fact that the relatively aggressive nature of such a cleaning treatment can, in the long term, result in more or less marked damage to the hair fibre, in particular with the gradual removal of the lipids or proteins held in or at the surface of the hair fibre.
Consequently, in order to improve the cosmetic properties of the above detergent compositions, and more particularly of those which are called upon to be applied to sensitized hair (i.e. hair which is found to be damaged or embrittled, in particular under the chemical action of atmospheric agents and/or of hair treatments, such as permanent waves, dyings or bleachings), it is now usual to introduce into the latter additional cosmetic agents, known as conditioning agents, intended mainly to repair or limit the harmful or undesirable effects induced by the various treatments or attacks to which the hair fibres are more or less repeatedly subjected. These conditioning agents can, of course, also improve the cosmetic behaviour of natural hair.
It has already been proposed to use vegetable or animal oils for this purpose. On account of the insoluble nature of the oils which can be used in washing and conditioning compositions, the aim is to maintain the oils as an even dispersion in the medium without, however, causing a fall in the viscosity and a decline in the detergent and foaming properties of the compositions. The oils must also be carried to the keratinous substances treated with a view to conferring on them, depending on the application, properties of softness, of gloss and of disentangling, without conferring a greasy nature.
Thus, following considerable research carried out on the question, it has now been found by the Applicant Company that, while using (A) a washing base and (B) a conditioning system comprising at least one oil-in-water emulsion having oil globules with a mean size of less than 150 nm and comprising an amphiphilic lipid phase which comprises at least one non-ionic amphiphilic lipid which is liquid at an ambient temperature of less than 45° C., it is possible to obtain stable detergent compositions exhibiting excellent cosmetic properties, in particular the ease of styling, the form retention, the liveliness and the body of the treated hair, while retaining their good intrinsic washing power and in particular their foaming power.
These new compositions make it possible to deposit a larger amount of oil on hair than with a conventional emulsion but without a greasy feel or visual appearance.
The compositions in accordance with the invention confer on hair, after rinsing, a notable treating effect which is displayed in particular by an ease of disentangling and a contribution of body, lightness, sleekness, softness and suppleness, without any feeling of greasiness.
Thus, the subject of the present invention is new detergent and conditioning compositions, characterized in that they comprise, in a cosmetically acceptable aqueous medium, (A) a washing base and (B) a conditioning system comprising at least one oil-in-water emulsion having oil globules with a mean size of less than 150 nm and comprising an amphiphilic lipid phase, this amphiphilic lipid phase comprising at least one non-ionic amphiphilic lipid which is liquid at an ambient temperature of less than 45° C.
Another subject of the invention is the use in cosmetics of the above compositions for cleaning and/or removing make-up from and/or conditioning keratinous substances, such as hair and skin.
As indicated above, the essential components forming part of the composition of the products according to the invention are (A) a washing base and (B) a conditioning system comprising at least one oil-in-water emulsion having oil globules with a mean size of less than 150 nm and comprising an amphiphilic lipid phase, characterized in that the amphiphilic lipid phase comprises at least one non-ionic amphiphilic lipid which is liquid at an ambient temperature of less than 45° C.
A—WASHING BASE:
The compositions in accordance with the invention necessarily comprise a washing base, generally an aqueous washing base.
The surfactant or surfactants forming the washing base can be chosen without distinction, alone or as mixtures, from anionic, amphoteric, non-ionic and cationic surfactants.
However, according to the invention, the washing base preferably comprises anionic surfactants or mixtures of anionic surfactants and of amphoteric surfactants and, more preferentially still, contains only this type of surfactant or mixture of surfactants.
The minimum amount of washing base is that just sufficient to confer a satisfactory foaming and/or detergent power on the final composition, whereas excessively large amounts of washing base do not really contribute additional advantages.
Thus, according to the invention, the washing base can represent from 4% to 50% by weight, preferably from 10% to 35% by weight and more preferentially still from 12% to 25% by weight of the total weight of the final composition.
The surfactants which are suitable for implementing the present invention are in particular the following:
(i) Anionic surfactant(s):
Their nature does not assume a really critical character within the context of the present invention.
Thus, by way of example of anionic surfactants that can be used, alone or as mixtures, in the context of the present invention, there may be mentioned in particular (nonlimiting list) the salts (in particular alkali metal, especially sodium, salts, ammonium salts, amine salts, aminoalcohol salts or magnesium salts) of the following compounds: alkyl sulphates, alkyl ether sulphates, alkylamido ether sulphates, alkylarylpolyether sulphates, monoglyceride sulphates; alkylsulphonates, alkyl phosphates, alkylamidesulphonates, alkylarylsulphonates, &agr;-olefinsulphonates, paraffinsulphonates; alkyl sulphosuccinates, alkyl ether sulphosuccinates, alkylamidesulphosuccinates; alkyl sulphosuccinamates; alkyl sulphoacetates; alkyl ether phosphates; acylsarcosinates; acylisethionates and N-acyltaurates, the alkyl or acyl radical of all these different compounds preferably containing from 12 to 20 carbon atoms, and the aryl radical preferably denoting a phenyl or benzyl group. Among the anionic surfactants which are further usable, there may also be mentioned the salts of fatty acids such as the salts of oleic, ricinoleic, palmitic and stearic acids, the acids of copra oil or of hydrogenated copra oil, and acyllactylates in which the acyl radical contains 8 to 20 carbon atoms. It is also possible to use weakly anionic surfactants, like alkyl-D-galactosideuronic acids and salts thereof, as well as the polyoxyalkylenated (C
6
-C
24
)alkyl ether carboxylic acids, the polyoxyalkylenated (C
6
-C
24
)alkylaryl ether carboxylic acids, the polyoxyalkylenated (C
6
-C
24
)alkylamido ether carboxylic acids and salts thereof, in particular those containing from 2 to 50 ethylene oxide groups, an
Finnegan, Henderson Farabow, Garrett and Dunner L.L.P.
Gupta Yogendra N.
L'Oreal (S.A.)
Mruk Brian P.
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