Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Hair coloring
Reexamination Certificate
1998-12-22
2001-08-14
Dudash, Diana (Department: 1619)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Hair coloring
C424S070100, C424S070110, C424S070120, C424S401000
Reexamination Certificate
active
06274131
ABSTRACT:
The present invention relates to the use of a mascara composition, comprising a mixture of waxes and of film-forming polymer, for curing and thickening keratin fibers, in particular the eyelashes or the tips of the hair. The invention also relates to a mascara composition comprising a mixture of waxes and a film-forming polymer.
It is common practice to make mascara compositions containing at least one wax. However, this wax is never used alone, since the make-up effect using such compositions proves to be very mediocre, leading to formation of a non-uniform film on the eyelashes, which is reflected in the formation of films that crack immediately after drying.
It is also known, according to patent applications WO 96/36323 and WO 96/33690, to combine a wax and a film-forming polymer in a mascara composition. However, such a combination does not curl the eyelashes well, nor does it give the eyelashes a thick make-up effect.
European patent applications EP-A-557,196 and EP-A-639,371 have also proposed mascara compositions containing microdispersions of waxes combined with film-forming polymers. However, such compositions do not allow a thick make-up effect to be obtained on the eyelashes: such mascaras are thus low-loading.
The aim of the invention is to propose a cosmetic composition which allows improved curling of the eyelashes and eyelashes loaded with make-up product to be obtained. The aim of the invention is also to propose a composition which gives the eyelashes instantaneous, long-lasting curling and which constitutes a makeup product that is well-tolerated by individuals with sensitive eyes.
The inventors have now found, surprisingly, that such a make-up product for the eyelashes can be obtained by using a combination of waxes and of specific film-forming polymers.
Thus, one subject of the invention is the use of a mascara composition for curling and thickening keratin fibers, in particular the eyelashes, comprising:
(i) a waxes-in-water emulsion of at least one mixture of waxes (i), referred to as hard waxes, having a needle penetration ranging from 1 to 7.5 and a melting point ranging from 70° C. to 110° C., the mixture of waxes (I) containing at least one wax (Ia, Ib) having a melting point ranging from 77° C. to 110° C., the mixture of waxes (I) being present in a content of at least 10% by weight relative to the total weight of the composition, the at least one wax being present in the form of particles greater than or equal to at least 1 &mgr;m in size, optionally further comprising at least one wax having a melting point ranging from 70° C. to less than 77° C. and having a needle penetration ranging from 1 to 7.5 and being in the form of particles greater than or equal to at least 1 &mgr;m in size,
(ii) at least 0.1% by weight, relative to the total weight of the composition, of a polymer system containing a film-forming polymer, the polymer system being capable of forming a film which produces, at a concentration of 7% in water, a greater than I % retraction of isolated stratum corneum at 30° C. and under a relative humidity of 40%.
Another subject of the invention is a method of curling and/or thickening keratin fibers comprising the step of applying to the keratin fibers and effective amount for the curling and/or thickening of a mascara composition comprising:
(i) a waxes-in-water emulsion of a mixture of at least one wax having a needle penetration ranging from 1 to 7.5 and a melting point ranging from 77° C. to 110° C., and at least one wax having a needle penetration ranging from 1 to 7.5 and a melting point ranging from 70° C. to less than 77° C., wherein the mixture is present in an amount of at least 10% by weightr relative to the total weight of said composition, and further wherein the waxes in the mixture are in the form of particle greater than or equal to at leat 1 &mgr;m in size, and
(ii) at least 0.1 % by weight, relative to the total weight of the composition, of a polymer system containing at least one film-forming polymer, wherein the polymer system is capable of forming a film which produces, at a concentration of 7% in water, a greater than 1% retraction of isolated stratum corneum at 30° C. and under a relative humidity of 40%.
Another subject of the invention is a mascara composition comprising:
(i) a waxes-in-water emulsion of at least one mixture of waxes (I), referred to as hard waxes, having a needle penetration ranging from 1 to 7.5 and a melting point ranging from 70° C. to 110° C., the mixture of waxes (I) containing at least a first wax (Ia) having a melting point greater than or equal to 77° C. and less than 83° C., a second wax (Ib) having a melting point ranging from 83° C. to 110° C., and a third wax (Ic) having a melting point greater than or equal to 70° C. and less than 77° C., the mixture of waxes (I) being present in a content of at least 10% by weight relative to the total weight of the composition, the mixture of waxes (I) being in the form of particles greater than or equal to at least 1 &mgr;m in size,
(ii) at least 0.1% by weight, relative to the total weight of the composition, of a polymer system containing a film-forming polymer, the said polymer system being capable of forming a film which produces, at a concentration of 7% in water, a greater than 1% retraction of isolated stratum corneum at 30° C. and under a relative humidity of 40%.
Another subject of the invention is a mascara product comprising a reservoir containing a mascara composition as defined above, and equipped with a system for applying the composition to keratin fibers, in particular the eyelashes.
Another subject of the invention is a process for making up keratin fibers, in particular the eyelashes, which involves applying a composition as defined above to the keratin fibers.
According to the invention, the waxes are in the form of particles preferably having a size greater than or equal to 1.5 &mgr;m, in particular ranging from 1.5 to 10 &mgr;m, and better still ranging from 1.5 &mgr;m to 3.5 &mgr;m.
The term hard wax (or wax (I)) is understood to refer to a wax having a melting point ranging from 70° C. to 110° C. and a needle penetration ranging from 1 to 7.5. The needle penetration of waxes is determined according to French standard NF T 60-123 or US standard ASTM D 1321, at a temperature of 25° C. According to these standards, the needle penetration is a measurement of the depth, expressed in tenths of a millimeter, to which a standardized needle weighing 2.5 g, located in a movable mounting weighing 97.5 g and placed on the wax to be tested, for 5 seconds, penetrates into the wax.
The waxes (I) used in accordance with the invention can be selected from waxes of animal origin, waxes of plant origin, waxes of mineral origin, synthetic waxes and the various fractions of waxes of natural origin, all of these waxes having the two characteristics (needle penetration, melting point) mentioned above.
The waxes (I) can be selected in particular from rice bran wax, carnauba wax, ouricurry wax, candelilla wax, montan waxes, sugar cane waxes, and certain polyethylene waxes which satisfy the criteria for the waxes (I).
Advantageously, the composition according to the invention can comprise an amount of the mixture of waxes (I) preferably ranging from 10% to 30% by weight, relative to the total weight of the composition, more preferably from 13% to 25% and better still at least 15%, and especially from 15% to 20%.
The mixture of waxes (I) can comprise at least a first wax (Ia) having a melting point of greater than or equal to 77° C. and less than 83° C. Such a wax can be, for example, rice bran wax.
The mixture of waxes (I) can also comprise at least a second wax (Ib) having a melting point ranging from 83° C. to 110° C. This second wax (Ib) can be used alone in the mixture of waxes (I) or can be combined with the wax (Ia). Such a wax (Ib) can be, for example, carnauba wax, ouricurry wax or montan waxes. Carnauba wax is preferably used.
The mixture of waxes (I) can also comprise a third wax (Ic) having a melting point of greater than or equal to 70° C
Bodelin-LeComte Sophie
Debert Daniele
Piot Bertrand
Dudash Diana
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal (S.A.)
Yu Gina C
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