Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Hair coloring
Patent
1998-10-21
2000-10-03
Azpuru, Carlos A.
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Hair coloring
424 7803, 424501, A61K 3174, A61K 950
Patent
active
061269298
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to cosmetic or dermatological compositions comprising, in a cosmetically acceptable aqueous medium, as an agent for coating keratin fibres, a film-forming mixture consisting of particles of film-forming polymer and of rigid, non-film-forming particles, as well as to their use in the cosmetics or dermopharmacy field, in particular in products for making up the eyelashes and the eyebrows and in hair styling and/or hair maintenance products.
Two types of traditional mascara formulation are known, i.e. so-called "cream" aqueous mascaras in the form of an emulsion of wax in water, and so-called "waterproof" mascaras, which are anhydrous or have a low water content and which are dispersions of waxes in oils.
Conventional cream mascaras generally distribute themselves well along the eyelashes and form a uniform deposit along the eyelashes, and produce satisfactory lengthening of the eyelashes. However, they have the drawback of being relatively non-resistant to water and ambient moisture (rain, tears, baths, etc.) and have poor mechanical properties such as resistance to dry rubbing (passing the hand over the eyelids).
Conventional waterproof mascaras have very high resistance to water and to ambient moisture, but have poor properties as regards deposition and distribution of the product along the eyelashes, coloration of the eyelashes and as regards the mechanical properties, and, moreover, require the use of specific oil-based make-up-removing products on account of their high remanence to water.
In order to overcome these various technical problems, it has been proposed in recent years to add into traditional mascara formulations dispersions of film-forming polymer particles as agents which make it possible either to improve the water-resistance or to facilitate the removal of make-up or to improve the properties relating to making up the eyelashes. However, these wax-containing formulations lead to mechanical properties that are still insufficient.
One of the aims of the present invention is to make a new type of aqueous mascara formulation using, as an agent for coating the eyelashes, an aqueous dispersion of film-forming polymer particles optionally in the presence of a plasticizer, and which allows the drawbacks mentioned above to be solved.
The Applicant has observed that an aqueous mascara composition containing an aqueous suspension of pigments and using, as agent for coating the eyelashes, a suspension of film-forming polymer particles optionally in the presence of a plasticizer, leads to a heterogeneous, discontinuous, undesirable deposit on the eyelashes. The addition of surfactants to the mascara formulation in order to lower its surface tension to a value below that of the surface energy of an eyelash does not allow this phenomenon to be eliminated.
It is thus desirable to design novel mascara formulations based on film-forming polymer particles and pigments in suspension, which allow this phenomenon to be attenuated considerably or even eliminated altogether.
The hairstyling compositions of the prior art using, as main or auxiliary agent for coating the hair, an aqueous dispersion of film-forming polymer particles optionally in the presence of plasticizers, also have a tendency to lead, after application and drying, to heterogeneous and discontinuous coating of the hair.
Another subject of the present invention is to prepare hair formulations for styling and/or maintaining the hair, which contain, as main agent for coating the eyelashes, an aqueous dispersion of film-forming polymer particles optionally in the presence of a plasticizer, and which allows this phenomenon to be substantially attenuated or even eliminated altogether.
The Applicant has discovered, surprisingly, that by combining certain types of aqueous dispersion of film-forming polymer particles with certain non-film-forming particles in specific proportions which will be defined later in the description, aqueous mascara formulations can be prepared containing a composite film-forming material which make
REFERENCES:
patent: 5925337 (1999-07-01), Arraudeau et al.
Nicole Alberola et al., "Composites particulaires : modelisation du comportement viscoelastique, assortie du concept de percolation", C.R. Acad. Sci. Paris, t. 319, Serie II, pp. 1129-1134, 1994.
English Language Derwent Abstract of EP 0 764 436.
English Language Derwent Abstract of FR 2 528 699.
Azpuru Carlos A.
L'Oreal S.A.
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