Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form
Reexamination Certificate
2002-04-10
2004-04-27
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
C424S064000, C424S070100, C424S070700, C424S047000, C424S059000
Reexamination Certificate
active
06726915
ABSTRACT:
The present invention relates to a solid composition, in particular a solid cosmetic or pharmaceutical composition, such as a care, treatment and/or make-up composition for the skin, including the scalp, and/or for the lips of human beings, the said composition comprising a thickened liquid fatty phase and being in particular in the form of a stick or tube of make-up, such as a lipstick.
It is common practice to use a structured, i.e. thickened or gelled, liquid fatty phase in compositions, in particular cosmetic and dermatological compositions, in order to obtain the desired consistency. The thickening of oils (or of phases that are liquid at room temperature) in particular makes it easier to take up the product from its packaging without any significant loss, to limit the diffusion of the product to the local treatment area, to distribute the product uniformly over the local treatment area or to be able to use the product in amounts that are sufficient to obtain the desired cosmetic or dermatological effect. This is especially the case in solid compositions such as deodorants, lip balms and lipsticks, concealer products and cast foundations. This thickening is of prime importance in particular for care, hygiene or make-up compositions such as lipsticks which need to be distributed homogeneously over the local surface to be treated, as well as for hair compositions which need to be spread and distributed uniformly along the keratin fibres and not run down the forehead, the nape of the neck, the face or into the eyes.
To overcome these problems, use is usually made of waxes or fillers. Unfortunately, these waxes and/or fillers have a tendency to make the composition matt and opaque, which is not always desirable, in particular for a lipstick. Specifically, women are always in search of a lipstick in the form of a tube which gives a glossy film; moreover, certain compositions such as lip balms or ointments can be in the form of translucent, or even transparent, sticks.
It is also known practice to thicken oils with polymeric thickeners. Unfortunately, the known thickeners for oils have to be used in large amounts in order to obtain a gel of high viscosity, for example of greater than 1.3 Pa.s. However, too large an amount of thickener can give the composition inadequate cosmetic properties, in particular a sticky feel and a lack of slipperiness, these drawbacks potentially being very inconvenient, or even unacceptable.
Moreover, it is also known practice to gel compositions, in particular cosmetic compositions, using a gelling agent of trialkyl tri(alkylamino-carbonyl)cyclohexane type. These gelling agents make it possible to improve the stability of the compositions comprising them. However, once again, the gels obtained have poor transparency. Furthermore, a large proportion of these gelling agents do not allow oily silicone media to be gelled.
Finally, it is known practice to thicken cosmetic compositions with diamide derivatives, especially in documents JP7/138 555 and JP10/237 034. However, the cosmetic compositions disclosed in the said prior art all comprise a large amount of waxes (beeswax, ozokerite or hexadecanoic acid in particular). The structuring and gelation of the stick therefore does not take place solely due to the diamide compounds, but also due to the waxes. However, using a large amount of waxes has certain drawbacks, especially in terms of the matt effect or opacity of the final composition thus prepared.
Furthermore, it is not possible to incorporate silicone oils in large amount into a composition also comprising conventional waxes.
One object of the present invention is to propose the production of a composition, in particular a cosmetic composition, which is in solid form, and which preferably comprises little or even no waxes, while at the same time being capable, firstly, of retaining good cosmetic properties, and in particular a certain level of translucency, or even transparency, and, secondly, of comprising silicone oils, in particular in large amount.
One subject of the invention is thus a composition, in particular a cosmetic or pharmaceutical composition, which is in solid form, comprising an oily phase and at least one compound of formula (I) below:
R—CO—NH—A—NH—CO—R′
in which:
R and R′, which may be identical or different, represent a hydrogen atom or a saturated or unsaturated, linear, branched or cyclic, preferably a saturated linear, hydrocarbon-based chain containing from 1 to 22 carbon atoms, in particular 6-18 carbon atoms, preferably from 10 to 14 carbon atoms, more preferably from 11 to 13 carbon atoms and better still 11 carbon atoms, optionally substituted with one or more groups chosen from aryl (—C
6
H
5
) ester (—COOR″ with R″ being an alkyl group containing 2 to 12 carbon atoms), amide (—CONHR″ with R″ being an alkyl group containing 2 to 12 carbon atoms), urethane (—OCONHR″ with R″ being an alkyl group containing 2 to 12 carbon atoms) and urea (—NHCONHR″ with R″ being an alkyl group containing 2 to 12 carbon atoms) groups; and/or optionally containing 1 to 3 hetero atoms chosen from O, S and N; and/or optionally substituted with 1 to 4 halogen atoms, in particular fluorine atoms, and/or with 1 to 3 hydroxyl radicals, on condition that R and R′ are other than hydrogen, and
A represents a saturated or unsaturated, linear, cyclic or branched hydrocarbon-based chain (in the form of a divalent radical) containing 1 to 18 carbon atoms, in particular 2 to 12 carbon atoms and preferably from 4 to 10 carbon atoms, optionally substituted with one or more groups chosen from aryl (—C
6
H
5
), ester (—COOR″ with R″ being an alkyl group containing 2 to 12 carbon atoms), amide (—CONHR″ with R″ being an alkyl group containing 2 to 12 carbon atoms), urethane (—OCONHR″ with R″ being an alkyl group containing 2 to 12 carbon atoms) and urea (—NHCONHR″ with R″ being an alkyl group containing 2 to 12 carbon atoms) groups; and/or optionally containing 1 to 3 hetero atoms chosen from O, S and N; and/or optionally substituted with 1 to 4 halogen atoms, in particular fluorine atoms, and/or with 1 to 3 hydroxyl radicals.
Specifically, it is been found that using the compounds of formula (I) makes it possible to structure and thicken liquid (or oily) fatty phases substantially, or even to gel them completely, and thus to obtain stable cosmetic compositions in solid gelled form, which have satisfactory cosmetic properties. These compositions may even be free of waxes while at the same time retaining their rigidity and their good cosmetic properties. Moreover, the liquid fatty phase may be gelled even though it comprises a large amount of silicone oils.
The composition according to the invention has good cosmetic properties: it is not sticky when applied and is slippery and easy to apply. It produces a homogeneous, uniform film which covers well and is comfortable to wear.
Furthermore, the composition may advantageously be clear, transparent or translucent. These terms are understood as having their conventional dictionary definitions. Thus, a translucent composition allows light to pass through without, however, allowing the contours of objects to be clearly distinguished. A transparent composition allows light to pass through easily and allows objects to be distinguished clearly through its thickness.
In general, a transparent composition will have a maximum light transmittance value, irrespective of the wavelength, of between 400 nm and 800 nm, through a 1 cm thick sample, of between 35% and 100% and preferably of at least 50% (see EP 291 334). A translucent composition will have a maximum light transmittance value of between 2% and 35%. The transmittance can be measured by placing a 1 cm thick sample in the light beam of a spectrophotometer working in the wavelengths of the light spectrum.
The composition according to the invention thus comprises at least one compound corresponding to formula (I) below:
R—CO—NH—A—NH—CO—R′
in which:
R
Genard Sylvie
Livoreil Aude
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Howard S.
L'Oreal
Page Thurman K.
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