Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2001-05-04
2003-03-18
Padmanabhan, Sreeni (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S059000, C424S063000, C424S064000, C424S065000
Reexamination Certificate
active
06534072
ABSTRACT:
The present invention relates to a process for increasing the persistence of at least one cosmetic effect and/or care effect of a cosmetic composition, and to a cosmetic composition, in particular for making up and/or caring for the skin, including the skin of the eyelids, and also of the lips and of superficial body growths such as the eyelashes, the eyebrows, the nails and the hair. The invention also relates to the use of this cosmetic composition as, for example, a lipstick, a mascara, an eyeliner, a foundation, a powder, a blusher, an eyeshadow, a body make-up, a moisturizing product, a deodorant or an antiperspirant.
In cosmetics, it is desired to obtain compositions which, when applied to the skin, the lips and superficial body growths, form deposits, for example film-forming deposits, which have one or more desired special cosmetic and/or care effects.
Thus, for make-up compositions such as lipsticks, mascaras and eyeliners, efforts are made to obtain compositions which form deposits with suitable colouring and/or gloss effects. For compositions including an active care agent such as moisturizing products, deodorants and antiperspirants, efforts are made in particular to obtain the optimal effect of the active care agent present in the composition.
In all cases, efforts are also made to obtain the longest possible duration of the cosmetic and/or care effect(s). For example, for lipsticks, mascaras and eyeliners, it is important to obtain sustained staying power of the colouring effect and/or gloss; for foundations, powders, blushers, eyeshadows and body make-up, it is important to obtain a matt effect which is persistent and durable despite friction or the secretion of sebum or sweat; and for compositions including an active care agent, it is important to obtain the longest possible activity of the active agent.
It has been proposed to incorporate silicone oils into cosmetic compositions. The incorporation of these silicone oils into compositions gives deposits properties of hydrophobicity, gloss and a non-greasy feel, but the deposits obtained show poor resistance to external agents such as sweat or sebum, and in particular to mechanical attack such as friction.
Polysiloxanes comprising amide units and possibly comprising groups capable of establishing hydrogen bonds, which are used as gelling agents for silicone oils in cosmetic compositions, are disclosed in patent WO 99/06473 from Colgate-Palmolive. Compositions that are generally solid, transparent or translucent are thus obtained.
U.S. Pat. No. 5,919,441 from Colgate-Palmolive discloses a cosmetic composition based on a fluid component comprising at least one volatile or non-volatile silicone and at least one gelling agent. This gelling agent is a polymer containing both organosiloxy units and groups forming hydrogen bonds which are chosen from ester, urethane, urea, thiourea and amide groups and combinations thereof. The use of such a gelling agent leads, in particular, to solid compositions, that are preferably transparent or translucent.
Patent FR 2 708 272 from Rhôone-Poulenc discloses the use as adhesives of polyorganosiloxanes comprising groups capable of forming hydrogen bonds.
According to the invention, it has been found that it is possible to increase the persistence of at least one cosmetic and/or care effect of a cosmetic composition comprising an oily phase, by incorporating into the oily phase an effective amount of at least one linear or cyclic polyorganosiloxane comprising at least two organosiloxy units and at least two side and/or end groups each capable of forming at least one hydrogen bond with one or more partner groups.
The expression <<increased persistence of at least one cosmetic and/or care effect of a cosmetic composition according to the invention>> means the fact that at least one cosmetic and/or care effect of the composition (for example the gloss and/or colouring effect for a lipstick, a mascara or an eyeliner, the matt-effect and the staying power of the colour for a foundation, a powder or a body make-up, the suppression of body odours for a deodorant or the moisturization for a moisturizing product) is maintained at its initial level or close to its initial level for a significantly sustained period when compared with a similar composition which does not comprise any polyorganosiloxane containing at least two side and/or end groups each capable of forming at least one hydrogen bond, in particular when exposed to external agents, and more particularly during a mechanical attack such as friction.
According to the invention, the expression <<effective amount of a polyorganosiloxane>> means an amount which is sufficient to significantly increase the persistence of one or more cosmetic and/or care effects of the cosmetic composition.
The term <<partner group>> means any side and/or end group borne by another molecule of the said polyorganosiloxane, which is capable of forming at least one hydrogen bond with the side and/or end group of the said polyorganosiloxane. This partner group may or may not be identical to the side and/or end group with which it forms at least one hydrogen bond.
The term <<oily phase>> means a non-aqueous medium which is liquid at room temperature (25° C.) and at atmospheric pressure (1.013×10
5
Pa (760 mm Hg)), containing one or more fatty substances that are liquid at room temperature and under atmospheric pressure, and that are generally miscible with each other.
One subject of the present invention is thus a process for increasing the persistence of at least one cosmetic and/or care effect of a cosmetic composition.
A subject of the present invention is also a cosmetic composition, in particular to make up and/or care for the skin, the lips and superficial body growths such as the eyelashes, the eyebrows, the nails and the hair, which has increased persistence of at least one cosmetic and/or care effect.
Another subject of the present invention is the use of a cosmetic composition according to the invention as a lipstick, mascara, eyeliner, foundation, powder, blusher, eyeshadow, body make-up, moisturizing product, deodorant or antiperspirant. In this case, all these products have at least one cosmetic and/or care effect whose persistence is increased.
Other characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the various examples which follow.
One subject of the invention relates to a process for increasing the persistence of at least one cosmetic and/or care effect of a cosmetic composition comprising an oily phase. This process comprises the incorporation into the said oily phase of an effective amount of at least one linear or cyclic polyorganosiloxane comprising at least two organosiloxy units and at least two side and/or end groups each capable of forming at least one hydrogen bond with one or more partner groups.
The polyorganosiloxanes that are suitable in the invention comprise at least two organosiloxy units which may be represented especially by the following formula:
R
a
R′
b
SiO
(4-a-b)/2
(I)
in which:
R represents a linear, branched or cyclic alkyl group, an aryl group, a polyether group or a fluoro group,
R′ represents a group capable of forming at least one hydrogen bond, preferably at least two hydrogen bonds,
a is 1, 2 or 3, and
b is 0 or 1, with the proviso that a+b is equal to 2 or 3.
The number of the said organosiloxy units preferably ranges from 2 to 50,000 and better still from 2 to 30,000.
The alkyl groups may be linear, branched or cyclic, and chosen especially from methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, cyclopentyl and cyclohexyl groups and other similar groups. The methyl group is particularly preferred.
Among the aryl groups, the phenyl, group is preferred.
Examples of polyether groups which may be mentioned are polyoxyethylene, polyoxypropylene and polyoxyethylene/polyoxypropylene groups.
The fluoro groups may be linear, branched or cyclic alky
Mondet Jean
Mougin Nathalie
L'Oreal
Nixon & Vanderhye P.C.
Padmanabhan Sreeni
Yu Gina C.
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