Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-06-23
2003-01-28
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S070170, C424S070120, C514S881000, C510S122000, C510S123000, C510S124000
Reexamination Certificate
active
06511671
ABSTRACT:
The present invention relates to cosmetic compositions with improved properties, preferably intended simultaneously for cleaning, conditioning and styling the hair and comprising, in a cosmetically acceptable carrier, at least one washing base chosen from surfactants with detergent power, at least one water-insoluble silicone, and at least one amphoteric polymer comprising from 1 to 20 mol % of at least one monomeric unit chosen from (meth)acrylate and (meth)acrylamide types containing at least one fatty chain, the fatty chain containing from 8 to 30 carbon atoms. The invention also relates to the use of the compositions in the above-mentioned cosmetic application.
The use of detergent hair compositions (or shampoos) based essentially on conventional surfactants especially of the anionic, nonionic and/or amphoteric type, but more particularly of the anionic type, is common for cleaning and/or washing the hair. These compositions are applied to wet hair and the foam generated by massaging or rubbing with the hands allows, after rinsing with water, the removal of the various types of dirt initially present on the hair.
These base compositions indeed possess good washing power, but the intrinsic cosmetic properties attached to them may remain nevertheless fairly weak, in particular because of the fact that the relatively aggressive nature of such a cleaning treatment can cause in the long term damage to the hair fiber which is marked to a greater or lesser degree, and may be linked in particular to the gradual removal of the lipids or proteins contained in or at the surface thereof.
Consequently, to improve the cosmetic properties of the above detergent compositions, and more particularly of those which are intended to be applied to sensitive hair (i.e., hair which has become damaged or which has been made fragile, especially under the chemical action of atmospheric agents and/or of hair treatments, such as permanent waving, dyeing or bleaching) it is now customary to introduce therein additional cosmetic agents called conditioning agents, intended mainly to repair or limit the harmful or undesirable effects induced by the various treatments or attacks to which the hair fibers are subjected more or less repeatedly. These conditioning agents can of course also improve the cosmetic behavior of natural hair.
The conditioning agents most commonly used to date in shampoos are silicones, which indeed confer on washed, dry or wet hair greatly improved ease of disentanglement, softness and sleekness compared to what may be obtained with the corresponding cleaning compositions not containing them.
However, and in spite of the progress recently made in the field of shampoos, the latter are not completely satisfactory, such that a high demand currently still exists in relation to being able to have products exhibiting better performance at the level of one or more of the cosmetic properties mentioned above.
The present invention is aimed at satisfying such a need.
Thus, following major research studies carried out on subjects, it has now been found completely unexpectedly and surprisingly, that by introducing at least one amphoteric polymer comprising from 1 to 20 mol % of at least one monomeric unit chosen from (meth)acrylate and (meth)acrylamide types containing at least one fatty chain, the fatty chain containing from 8 to 30 carbon atoms, into detergent compositions containing at least one washing base, in particular hair, the compositions also containing at least one water-insoluble silicone, it is possible to substantially and significantly improve the cosmetic properties attached thereto, while preserving their good intrinsic washing power.
Without wishing to limit the present invention to any theory, it would appear that, during rinsing, particular interactions and/or affinities exist between the silicones, the amphoteric polymers in accordance with the invention and the hair which promote a uniform, substantial and lasting deposition of the silicones and amphoteric polymers at the surface of the hair. This qualitative and quantitative deposition is probably one of the causes of the improvement observed in the final properties in highly preferred embodiments, in particular the ease of hairstyling, the shape retention, the vitality and the body of the treated hair.
All these discoveries form the basis of the present invention.
Thus, according to the present invention, novel, in particular detergent and in particular hair, compositions are now provided comprising, in a cosmetically acceptable medium, at least one washing base, at least one water-insoluble silicone and at least one amphoteric polymer comprising from 1 to 20 mol % of at least one monomeric unit chosen from (meth)acrylate and (meth)acrylamide types containing at least one fatty chain, the fatty chain containing from 8 to 30 carbon atoms.
The subject of the invention is also the cosmetic use of the above compositions for cleaning, conditioning and styling the hair.
However, other characteristics, aspects and advantages of the invention will appear even more clearly on reading the description which follows as well as the concrete, but not at all limiting, examples intended to illustrate it.
An aspect of the invention involves hair product compositions comprising (i) at least one surfactant with detergent power intended to form the washing base, (ii) at least one water-insoluble silicone and (iii) at least one of the amphoteric polymers referred to above.
A—Washing Base
The compositions in accordance with the invention comprise at least one washing base, generally aqueous.
The surfactant(s) forming the washing base may equally well be chosen, alone or as mixtures, from anionic, amphoteric, nonionic, zwitterionic and cationic surfactants. However, according to the invention, the washing base preferably comprises anionic surfactants or mixtures of anionic surfactants and amphoteric surfactants or nonionic surfactants.
The minimum quantity of washing base is that which is just sufficient to confer a satisfactory foaming and/or detergent power on the final composition, and excessively large quantities of washing base do not necessarily provide additional advantages.
Thus, according to the invention, the washing base may be present in an amount generally ranging from 4% to 50% by weight, preferably from 6% to 25% by weight, and still more preferably from 8% to 20% by weight, of the total weight of the final composition.
The surfactants which are suitable for carrying out the present invention are in particular the following:
(i) Anionic Surfactant(s)
By way of example of anionic surfactants which 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, amino alcohol salts or magnesium salts) of the following compounds: alkyl sulphates, alkyl ether sulphates, alkylamidoether sulphates, alkylarylpolyether sulphates, monoglyceride sulphates; alkyl sulphonates, alkyl phosphates, alkylamidesulphonates, alkyl aryl sulphonates, ∝-olefinsulphonates, paraffinsulphonates; (C
6
-C
24
)alkyl sulphosuccinates, (C
6-C
24
)alkyl ether sulphosuccinates, (C
6
-C
24
)alkylamide sulphosuccinates; (C
6
-C
24
)alkyl sulphoacetates; (C
6
-C
24
)acyl sarcosinates and (C
6
-C
24
)acyl glutamates. It is also possible to use (C
6
-C
24
)alkyl polyglycoside carboxylic esters such as alkyl glucoside citrates, alkyl polyglycoside tartrate and alkyl polyglycoside sulphosuccinates, alkyl sulphosuccinamates; acyl isethionates and N-acyltaurates. The alkyl or acyl radical of all these various compounds preferably comprises from 12 to 20 carbon atoms, and the aryl radical preferably is a phenyl or benzyl group. Among the anionic surfactants which can still be used, 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; the acyl lactylates whose acyl radical comprises 8 to 20
Dubief Claude
Fack Géraldine
Restle Serge
Finnegan Henderson Farabow Garrett & Dunner LLP
Krass Frederick
L'Oreal (S.A.)
Ostrup Clinton
LandOfFree
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