Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-09-06
2002-12-10
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S061000, C424S063000, C424S070700
Reexamination Certificate
active
06491932
ABSTRACT:
The present invention relates to a cosmetic composition for making up at least one keratin substance, comprising at least one treated glass particle. The invention also relates to a cosmetic process for making up at least one keratin substance. The composition according to the invention can be applied to the nails, facial or body skin, including the lips, the eyelashes, and the hair, in particular of human beings. More specifically, the invention can be a nail varnish.
The make-up composition can be a nail varnish, a face powder, an eyeshadow, a foundation, a mascara, an eyeliner, or a make-up product for the lips or body. The composition can also be applied to make-up accessories such as false nails, false eyelashes or wigs, or alternatively to pastilles or patches adhering to the skin or the lips (such as beauty spots).
Make-up compositions, such as nail varnishes, are colored with the aid of dyestuffs such as soluble dyes, pigments that are generally metal oxides, such as iron oxides, or alternatively with the aid of nacres such as micas coated with metal oxides such as titanium oxide. However, when the film of make-up is subjected to stresses such as impacts, pressure or rubbing, the dyestuffs and in particular the pigments are not always resistant to these stresses and wear away. A substantial loss of color of the make-up is then observed, thus obliging the user to reapply the make-up regularly, optionally after the damaged coat has been removed. It is also known practice to use aluminum flakes to obtain a color with a metallic effect. Like the pigments, these flakes can show little resistance to stresses and wear away. Furthermore, these flakes can be light-opaque, light-scattering, and matt. In addition, when they are combined with colored pigments which do not have a metallic appearance, for example nacres, the color of these pigments may not emerge; it is therefore not possible to obtain a make-up having a colored metallic appearance.
It would be advantageous to overcome at least one of the drawbacks mentioned above and one of the embodiments of the invention relates to obtaining a make-up on at least one keratin substance that has a sparkling metallic appearance and good wear resistance.
The inventors have observed that a novel type of make-up for at least one keratin substance can be obtained by using a cosmetic composition comprising at least one dyestuff in a cosmetically acceptable medium, wherein the at least one dyestuff comprises glass particles coated with at least one metallic coat.
When the composition according to the invention is applied to at least one keratin substance such as the nails, the glass particles coated with the at least one metallic coat can be distributed in the coat deposited. This composition can afford a make-up film which has a very shiny, sparkling metallic appearance, with a mirror effect, irrespective of the direction of observation, and which does not scatter light. The make-up can also have good wear resistance, in particular, resistance to impacts, rubbing and abrasion, as well as good resistance to chipping. A sparkling make-up which adheres well to the made-up support and which has good staying power can, in certain embodiments of the invention, be obtained. Furthermore, the glass particles can transmit light well, which allows the glass particles to be combined with at least one colored pigment in order to obtain colored make-up with a metallic effect.
Another subject of the invention is a cosmetic process for making up at least one keratin substance, comprising the application of a composition as defined above to the at least one keratin substance.
Another subject of the invention is also the use, in a composition for making up at least one keratin substance, of glass particles coated with at least one metallic coat, in order to obtain a glossy and/or wear-resistant make-up.
The glass particles used as the at least one dyestuff in the composition according to the invention are coated with at least one metallic coat.
The at least one metallic coat can be formed from at least one metal, such as silver, aluminum, chromium, nickel, molybdenum, gold, copper, tin, and magnesium, and, among these representative examples, silver, chromium, nickel, and molybdenum.
In one embodiment of the invention, the at least one metallic coat of the coated glass particles can be present in an amount by weight, relative to the total weight of the particles, generally ranging from 0.1% to 50%, such as 1% to 20%, and further such as 2% to 8%.
The glass particles coated with the at least one metallic coat can have an average size generally ranging from 1 &mgr;m to 500 &mgr;m, such as 10 &mgr;m to 300 &mgr;m, and further such as 25 &mgr;m to 150 &mgr;m.
The glass particles coated with the at least one metallic coat can have a thickness generally ranging from 0.1 &mgr;m to 25 &mgr;m, such as 0.5 &mgr;m to 10 &mgr;m, and further such as 0.5 &mgr;m to 5 &mgr;m.
The glass particles coated with the at least one metallic coat are described in particular in documents JP-A-09 188 830, JP-A-10 158 450, JP-A-10 158 541, JP-A-07 25 258 460 and JP-A-05 017 710, the disclosures of which are specifically incorporated by reference herein.
The glass particles coated with the at least one metallic coat that can be used, for example, are sold by the company Toyal under the names Microglass Metashine REFSX 2025 PS and GF 2140, silver-coated particles, and under the names Crystal Star GF 550 and GF 2525, particles coated with a nickel/chromium/molybdenum alloy.
The glass particles coated with the at least one metallic coat can be present in the composition according to the invention in an amount by weight, relative to the total weight of the composition, generally ranging from 0.1% to 90%, such as 1% to 30%, and further such as 2% to 10%.
The composition according to the invention can also comprise at least one film-forming polymer. In the present application, the expression “film-forming polymer” means a polymer which is capable, by itself or in the presence of a film-forming auxiliary, of forming an isolable film. The at least one film-forming polymer in the composition can be dissolved or dispersed in the form of particles in the cosmetically-acceptable medium of the composition according to the invention.
Representative film-forming polymers that can be used in the composition of the present invention include synthetic polymers, radical-mediated types, polycondensate types, and polymers of natural origin.
The expression “radical-mediated film-forming polymer” means a polymer obtained by polymerization of one or more monomers containing unsaturation, in particular ethylenic unsaturation, certain monomers being capable of homopolymerizing (unlike polycondensates).
The at least one film-forming polymer of radical-mediated type can be chosen from vinyl polymers, and vinyl copolymers, in particular acrylic polymers.
The vinyl film-forming polymers can result from the polymerization of monomers containing ethylenic unsaturation having at least one acid group and/or esters of these acidic monomers and/or amides of these acidic monomers.
Representative monomers bearing an acid group which can be used include &agr;,&bgr;-ethylenic unsaturated carboxylic acids, such as acrylic acid, methacrylic acid, crotonic acid, maleic acid and itaconic acid, and, in particular, (meth)acrylic acid and crotonic acid. Among these representative monomers, (meth)acrylic acid can be used.
Representative esters of acid monomers include (meth)acrylic acid esters, also known as (meth)acrylates, especially alkyl(meth)acrylates, in particular of a C
1
-C
20
alkyl, such as C
1
-C
8
alkyl; aryl(meth)acrylates, in particular of a C
6
-C
10
aryl; and hydroxyalkyl(meth)acrylates, in particular of a C
2
-C
6
hydroxyalkyl.
Representative alkyl(meth)acrylates include methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate and lauryl methacrylate.
Representative hydroxyalkyl(meth)acrylates include hydroxyethyl acrylate, 2-hydroxypropyl acrylate, hydroxy
Brenne Ingrid
Ramin Roland
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Howard S.
L'Oreal (S.A.)
Page Thurman K.
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