Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1999-08-31
2003-11-04
Padmanabhan, Sreeni (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S070100, C424S070900, C424S070120, C424S070150, C424S070160
Reexamination Certificate
active
06641821
ABSTRACT:
The subject-matter of the present invention is a film-forming composition comprising a film-forming polymer, a volatile oil and a polyolefin wax intended in particular for the cosmetics and dermatological fields. More specifically, the invention relates to a composition for caring for and/or making up human skin, keratinous fibres (eyelashes, eyebrows or hair) or lips.
This composition can be provided in particular in the form of an eyeliner, mascara, make-up product for the body, concealer, eyeshadow, face powder, foundation, lipstick, sun protection composition, composition for colouring the skin, or styling product.
Products for making up or treating the skin are usually applied in the form of a thin uniform layer. For compositions intended for making up the edges of the eyelids, known as eyeliners, it is desirable for the film deposited after application to be resistant to water (waterproof), to tears, to perspiration and to sebum. In addition, it is desirable for the film to exhibit good hold with regard to rubbing with the fingers.
It is also desirable for the film deposited on the skin to have non-transfer properties, that is to say that it is not at least partially deposited and/or does not leave traces, on certain substrates with which the skin can be brought into contact, in particular an item of clothing or the skin.
For a water-resistant mascara, it is also desirable for the mascara deposited on the eyelashes to exhibit good hold, not to transfer onto the skin, for example during contact with the fingers or the edges of the eyes, and to resist rubbing with the fingers and tears.
The use is known, in conferring, on these compositions, good hold on the skin or on the eyelashes, of film-forming polymers dissolved in a medium composed of organic solvents and optionally waxes. Such a composition is disclosed in particular in U.S. Pat. No. 5,480,632.
However, when these film-forming compositions are fluid, they may not always exhibit good homogeneity over time and the consistency of the composition may not be uniform. This non-homogeneity is detrimental to the expected make-up properties and in particular does not make it possible to obtain a uniform make-up. In addition, a to thickening of the composition over time can sometimes be observed, rendering the latter difficult to apply to the skin or to the eyelashes.
The aim of the present invention is therefore to provide a film-forming composition which can exhibit good stability over time and can result in the formation of a homogeneous water-resistant film having good hold.
The inventors have found that the use of a specific polyolefin wax in a composition comprising a volatile oil and a film-forming polymer makes it possible to obtain a composition which can be completely stable and homogeneous over time and can result in the formation of a film exhibiting, in particular, good hold. The film obtained can in particular be highly resistant to water, to rubbing, to perspiration and to sebum; it can also exhibit good non-transfer properties.
A subject of the invention is therefore a cosmetic or dermatological film-forming composition comprising a liquid fatty phase, including at least one volatile hydrocarbon oil, and at least one film-forming polymer in the liquid fatty phase, characterized in that it comprises at least one polyolefin wax resulting from the polymerization of alpha-olefins having at least 10 carbon atoms, the at least one wax having a melting point ranging from 50 to 80° C.
Another subject of the invention is a process for making up or non-therapeutically treating the skin and/or keratinous fibres and/or lips comprising applying the composition according to the invention to the skin and/or keratinous fibres and/or lips.
Another subject of the invention is the use of the composition according to the invention for producing a water-resistant film.
A further subject of the invention is the use of the composition according to the invention for producing a film exhibiting good hold with regard to rubbing and/or to tears and/or to perspiration and/or to sebum.
Another subject of the invention is the use of the composition according to the invention for producing a film having non-transfer properties.
The invention also relates to the use of a polyolefin wax as defined above in a cosmetic or dermatological film-forming composition comprising a liquid fatty phase, including at least one volatile hydrocarbon oil, and a film-forming polymer which is soluble or dispersible in said liquid fatty phase for producing a homogeneous composition.
a) The Polyolefin Wax:
The polyolefin wax used in the composition according to the invention results from, the polymerization and in particular from the homopolymerization of an alpha-olefin corresponding to the general formula: R—CH═CH
2
, in which R denotes an alkyl radical having at least 10 carbon atoms, preferably from 10 to 50 carbon atoms and more preferably from 25 to 50 carbon atoms. R is preferably a linear alkyl radical.
According to the invention, the term “homopolymerization of an alpha-olefin” is understood to mean the polymerization of monomers composed essentially of an alpha-olefin or a mixture of alpha-olefins as defined above.
The polyolefin wax preferably has a needle penetrability, measured at 44°C., ranging from 15 to 120, more preferably from 100 to 120 and better still from 105 to 115, determined as described below. The polyolefin wax preferably has a melting point ranging from 50° C. to 60° C.
Preferably, the polyolefin wax has a number-average molecular weight ranging from 400 to 3000, preferably from 2000 to 3000, and better still from 2500 to 2700.
Such polyolefin waxes are disclosed in U.S. Pat. No. 4,060,569 and 4,239,546, the disclosures of which are specifically incorporated by reference herein. These waxes are sold in particular under the name of “Performa V® 103”, “Performa V® 253” and “Performa V® 260” by the company Petrolite.
These waxes exhibit the following characteristics:
Performa V ®
Performa V ®
Performa V ®
103
253
260
Melting point
74° C.
67° C.
54° C.
(ASTM Standard D
36)
Number-average
2800
520
2600
molecular weight
Polydispersity of
6
8
11.5
the molecular
weight
Density, measured
0.92 g/cm
3
0.92 g/cm
3
0.90 g/cm
3
at 25° C. (ASTM
Standard D 792)
Hardness (needle
5
7
12
penetrability-ASTM
Standard D 1321)
at 25° C.
Hardness (needle
20
—
110
penetrability-ASTM
Standard D 1321)
at 44° C.
Viscosity at 99° C.
0.345 Pa · s
0.006 Pa · s
0.358 Pa · s
(ASTM Standard D
(345 centi-
(6 centi-
(358 centi-
3236)
poises)
poises)
poises)
The polydispersity of the molecular weight corresponds to the ratio of the weight-average molecular weight to the number-average molecular weight.
The needle penetrability of the waxes is determined according to French Standard NF T 60-123 or United States Standard ASTM D 1321 at a temperature of 44° C. According to these standards, the needle penetrability is a measurement of the depth, expressed in tenths of a millimeter, to which a standardized needle weighing 2.5 g, fitted into a mobile mounting weighing 97.5 g and placed on the test wax, penetrates into the wax over 5 seconds.
The polyolefin wax preferably has a density ranging from 0.85 to 0.95 g/cm
3
.
The polyolefin wax can generally be present in the composition according to the invention in a content ranging from 0.1% to 10% by weight with respect to the total weight of the composition and preferably from 1% to 5% by weight.
b) The Liquid Fatty Phase:
The term “liquid fatty phase” is understood to mean, in the present invention, any non-aqueous medium which is liquid at room temperature. The term “volatile oil” is understood to mean an oil which can evaporate at room temperature from a substrate to which it has been applied, in other words an oil having a measurable vapour pressure at room temperature. The term “hydrocarbon oil” is understood to mean an oil comprising only hydrogen and carbon atoms.
The preferred volatile hydrocarbon oils suitable for the composition according to the invention are in particular isoparaffins, name
Collin Nathalie
Piot Bertrand
Yon Maryline
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal (S.A.)
Padmanabhan Sreeni
Yu Gina C.
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