Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Hair coloring
Reexamination Certificate
2001-10-05
2004-04-06
Wang, Shengjun (Department: 1617)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Hair coloring
C424S070600, C424S059000, C424S063000, C424S064000, C424S401000, C514S772300
Reexamination Certificate
active
06716420
ABSTRACT:
The present invention relates to methods of dispersing at least one coloring agent in a cosmetic composition comprising including in the composition at least one heteropolymer, wherein the at least one heteropolymer is present in an amount effective to disperse the at least one coloring agent.
One problem that is prevalent in the preparation of formulations in the cosmetic and pharmaceutical industry is the dispersion of components which make up the composition. A great deal of time and energy is spent in an attempt to obtain an even distribution or dispersion of ingredients. A uniform dispersion of components that make up a cosmetic or pharmaceutical composition, including dispersion of pigments, can result in enhanced properties such as improved efficacy, more intense color, higher gloss, uniformity of batches, less clumping, and less energy required for mixing.
Further, many cosmetic or dermatological products comprise a structured, i.e., gelled and/or rigidified, liquid fatty phase, such as, for example, in mascaras, lipsticks, concealer products, eyeshadows, and foundations. This structuring may be obtained with the aid of traditional waxes and/or fillers. Unfortunately, these waxes and fillers may have a tendency to make the composition matte and to dull the intensity and color of any pigments in the composition, which may not always be desirable, in particular for a mascara. Specifically, consumers are always on the lookout for a mascara which can deposit a film with intense color and which is also increasingly glossy.
Both the intensity of the color and the gloss of a cosmetic composition are generally associated with the nature of the liquid fatty phase. The liquid fatty phase of mascaras commonly comprise a traditional wax. As discussed above, traditional waxes do not develop pigments, and adding pigments to such traditional waxes generally results in a composition having a grey, dull color and a matte look.
To overcome at least one of these drawbacks, the inventors envisaged including in cosmetic compositions comprising at least one coloring agent, at least one heteropolymer, for example, at least one polyamide polymer, in an amount effective to disperse the at least one coloring agent. In one embodiment, cosmetic compositions thus obtained displayed intense color as well as gloss. Therefore, the inventors have found, surprisingly, that certain heteropolymers may be effective for dispersing at least one coloring agent, and may make it possible to obtain a cosmetic composition whose application can produce a deposit which comprises at least one property chosen from gloss and intense color.
The present invention applies to cosmetic compositions which includes not only to pigmented make-up products, such as mascaras and lipsticks, but also pigmented care and/or treatment products for the skin, including the scalp, the human face and body.
Thus, in one embodiment, the present invention provides methods for dispersing at least one coloring agent in a cosmetic composition comprising including in the cosmetic composition at least one heteropolymer comprising a polymer skeleton which comprises at least one hydrocarbon-based repeating unit comprising at least one hetero atom in an amount effective to disperse the at least one coloring agent.
The present invention also provides, in one embodiment, a method for providing at least one property chosen from gloss and intense color to a cosmetic composition comprising including in the cosmetic composition (i) at least one heteropolymer comprising a polymer skeleton which comprises at least one hydrocarbon-based repeating unit comprising at least one hetero atom; and (ii) at least one coloring agent, wherein the at least one heteropolymer is present in an amount effective to disperse the at least one coloring agent.
Certain terms used herein are defined below:
“At least one” means one or more and thus includes individual components as well as mixtures/combinations.
“Alkyl group,” as used herein, refers to substituted linear alkyl groups, unsubstituted linear alkyl groups, substituted branched alkyl groups, unsubstituted branched alkyl groups, substituted cyclic alkyl groups and unsubstituted cyclic alkyl groups, wherein the aforementioned alkyl groups comprise at least one carbon and may optionally further comprise at least one hetero atom intercalated in the alkyl chain.
“Alkenyl group,” as used herein, refers to substituted linear alkenyl groups, unsubstituted linear alkenyl groups, substituted branched alkenyl groups, unsubstituted branched alkenyl groups, substituted cyclic alkenyl groups and unsubstituted cyclic alkenyl groups, wherein the aforementioned alkenyl groups comprise at least one carbon and at least one double bond, and may optionally further comprise at least one hetero atom intercalated in the alkenyl chain.
“Functionalized,” as used herein, means comprising at least one functional group. Non-limiting examples of functional groups include hydroxyl groups, ether groups, oxyalkylene groups, polyoxyalkylene groups, carboxylic acid groups, amine groups, amide groups, halogen-containing groups, including fluoro groups and perfluoro groups, halogens, ester groups, siloxane groups, and polysiloxane groups.
A “functionalized chain,” as used herein, refers to, for example, an alkyl chain comprising at least one functional group chosen, for example, from those recited above. For example, in one embodiment, the hydrogen atoms of at least one alkyl chain may be substituted at least partially with fluorine atoms.
“Gloss,” as used herein, refers to surface shininess. A cosmetic composition is provided with gloss, as used herein, when there is a measurable increase in the gloss of the composition upon addition of the at least one heteropolymer to the cosmetic composition. The gloss of a composition may, for example, be measured and evaluated using a gloss meter. Gloss meters are commonly used in the nail polish art, and measure the amount of light reflected from the surface or film of interest. The gloss may be quantified, for example, as a % reflectance. In one embodiment, the gloss of a cosmetic composition comprising the at least one heteropolymer is greater than the gloss of the composition prior to addition of the at least one heteropolymer.
“Hydrocarbon-based oil,” as used herein, refers to an oil comprising carbon and hydrogen atoms, optionally with at least one group chosen from hydroxyl groups, ester groups, carboxyl groups, and ether groups.
“Keratinous fibers,” as used herein, includes hair (including eyelashes and eyebrows).
“Keratinous material,” as used herein, includes skin (including lips), hair (including eyelashes and eyebrows), and nails.
“Liquid fatty phase,” as used herein, means a fatty phase which is liquid at room temperature (25° C.) and atmospheric pressure (760 mmHg), and which comprises at least one fatty substance that is liquid at room temperature and atmospheric pressure, also referred to as an oil.
“Polymer,” as used herein, means a compound comprising at least 2 repeating units.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed. Reference will now be made in detail to exemplary embodiments of the present invention.
As described above, the present invention relates to compositions and methods for dispersing at least one coloring agent and for making-up at least one keratinous material, in particular at least one human keratinous material, such as skin, including the lips, and/or at least one keratinous fiber which includes hair, eyelashes, and eyebrows, comprising at least one liquid fatty phase which comprises at least one heteropolymer and at least one coloring agent, wherein the at least one heteropolymer is present in an amount effective to disperse the at least one coloring agent.
The at least one heteropolymer of the present invention comprises a polymer skeleton comprising at least one hydrocarbon-based repeating unit comprising at least one hetero
Feng Sue
Kanji Mohamed G.
L′Oreal
Wang Shengjun
LandOfFree
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