Drug – bio-affecting and body treating compositions – Topical body preparation containing solid synthetic organic... – Skin cosmetic coating
Reexamination Certificate
2001-06-15
2002-10-15
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Topical body preparation containing solid synthetic organic...
Skin cosmetic coating
C424S401000, C424S070700
Reexamination Certificate
active
06464969
ABSTRACT:
The present invention relates to the use of at least one thermal transition agent in a cosmetic composition to obtain a film which may exhibit at least one of good resistance to cold water and removability with hot water. The invention also relates to a make-up and cosmetic care composition for keratinous materials, for example, human keratinous materials chosen from skin, eyelashes, eyebrows, hair and nails, comprising at least one hydrophobic film-forming polymer and at least one thermal transition agent, and also to a cosmetic care and make-up process for keratinous materials.
The composition may be in a form chosen from a mascara, an eyeliner, a product for the lips, a blusher, an eyeshadow, a foundation, a make-up product for the body, a concealer product, a product for the nails, an antisun composition, a skin coloring composition, and a skincare product. The invention relates, for example, to a mascara.
The composition may be in the form chosen, for example, from a mascara, an eyeliner, a product for the lips, a blusher, an eyeshadow, a foundation, a make-up product for the body, a concealer product, a product for the nails, an anti-sun composition, a skin coloring composition and a skincare product. In one embodiment of the invention, the composition is a mascara.
Mascara compositions in the form of a wax-in-water emulsion comprising surfactants are known from document WO-A-95/15741. However, the make-up film obtained with these compositions may not show good water resistance and when the film comes into contact with water, for example when bathing or taking a shower, it may partially disintegrate by being worn away or by spreading around the eyes. The wearing away of the film may give rise to a substantial reduction in the intensity of the color of the make-up, thus obliging the consumer to freshen the application of the mascara. Spreading of the film may form a very unsightly aureole around the area to which make-up has been applied. Tears and perspiration may also cause these same drawbacks.
To promote the water resistance of make-up, it is known practice from U.S. Pat. No. 4,423,031 to use acrylic polymers in aqueous dispersion. However, the mascara may be difficult to remove and may require special make-up removers comprising oils or organic solvents. These make-up removers may be irritating to eyes, for example, they may cause stinging, they may leave a veil over the eyes, or they may leave an uncomfortable greasy residual film on the skin around the eyes (eyelids).
To avoid the use of these special make-up removers, it is possible to use soap and water, as disclosed in document WO-A-96/33690, with a mascara comprising a water-insoluble polymer and a water-soluble film-forming polymer. However, the use of soap may cause eye discomfort by stinging or by depositing a veil over the eyes. Soap may also dissolve the make-up film, which can then spread around the eyes to form unsightly aureoles and skin staining.
The use of hot water, that is to say, water with a temperature of at least 35° C. (temperature measured at atmospheric pressure), ranging, for example, from 35° C. to 50° C., makes it possible to avoid the drawbacks of the make-up removers known hitherto. However, the cold-water-resistant mascara compositions described previously can be difficult to remove with hot water.
The present invention relates to a cosmetic composition which may have at least one of the following properties: may be removed with hot water and may have good cold-water resistance.
The Inventors have discovered that such a composition may be obtained using at least one hydrophobic film-forming polymer and at least one thermal transition agent. After applying the composition to keratinous materials, for example, eyelashes, the make-up obtained exhibits at least one of the following properties: good resistance to cold water (water with a temperature less than or equal to 30° C., for example, when bathing), resistance to tears, and resistance to perspiration. The make-up can be easily removed with hot water, for example, by rubbing with cotton wool or gauze. The make-up can be detached easily from the eyelashes and removed from the eyelashes without fragmenting into forms such as a sheath, fragments and pieces. The make-up thus removed does not spread on the skin, avoiding the formation of aureoles around the eye. When removing the make-up, the skin remains clean. The make-up may be removed simply with hot water and, for example, with hot water containing no detergent such as soaps. For the make-up removal, the hot water used may be chosen, for example, from tap water, demineralized water and mineral water brought to a temperature of at least 35° C., such as, for example ranging from 35° C. to 50° C.
One embodiment of the invention is the use of a composition comprising at least one hydrophobic film-forming polymer and at least one thermal transition agent, in a physiologically acceptable medium, to obtain a film wherein the composition is applied to keratinous materials and wherein the film may be removable with hot water, the at least one thermal transition agent being capable of undergoing a change of state at a transition temperature Tt chosen within a temperature range of from 25° C. to 80° C., and being not water soluble in water maintained at a temperature below the transition temperature wherein said at least one hydrophobic film-forming polymer and said at least one thermal transition agent are the same or different.
An embodiment of the invention is also a composition comprising, in a physiologically acceptable medium, at least 5% by weight relative to the total weight of the composition of at least one first hydrophobic film-forming polymer, and at least one thermal transition agent which is capable of undergoing a change of state at a transition temperature Tt chosen within a temperature range of from 25° C. to 80° C., and being not water soluble in water maintained at a temperature below the transition temperature wherein said at least one first hydrophobic film-forming polymer and said at least one thermal transition agent are the same or different.
Another embodiment of the invention is a composition comprising, in a physiologically acceptable medium, at least one first hydrophobic film-forming polymer, and at least one second polymer with a melting point ranging from 25° C. to 80° C. and a hydroxyl number of at least 5.
One embodiment of the invention is a cosmetic care or make-up process for keratinous materials, comprising the application of a composition as defined above to the keratinous materials.
An embodiment of the invention is also the use of at least one first hydrophobic film-forming polymer and at least one second polymer with a melting point ranging from 25° C. to 80° C. and a hydroxyl number of at least 5 in a cosmetic care or make-up composition for keratinous materials, to obtain a film applied to keratinous materials which may be resistant to cold water and removable with hot water.
A subject of the invention is also a cosmetic process for removing make-up from keratinous materials made up with a composition as defined above, comprising at least one step of rinsing the made-up keratinous materials with hot water maintained at a temperature of at least 35° C.
Yet another embodiment of the invention is a cosmetic process for removing make-up from made-up keratinous materials with a composition as defined above, comprising at least one step of rinsing the made-up keratinous materials with hot water maintained at a temperature of at least 35° C.
The expression “physiologically acceptable” may be understood to include a medium which is compatible with keratinous materials, for example, a cosmetic medium.
In another embodiment, the composition according to the invention may contain little or no emulsifier (surfactant), for example, the emulsifier is present in the composition in an amount less than 0.5% by weight relative to the total weight of the composition. Such a composition has good resistance to cold water.
The term “emulsifier” may indicate any amphiphilic
Auguste Frederic
de la Poterie Valerie
Mondet Jean
Finnegan Henderson Farabow Garrett & Dunner LLP
Fubara Blessing
L'Oreal (S.A.)
Page Thurman K.
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