Drug – bio-affecting and body treating compositions – Topical body preparation containing solid synthetic organic...
Patent
1997-03-11
1999-08-31
Venkat, Jyothsna
Drug, bio-affecting and body treating compositions
Topical body preparation containing solid synthetic organic...
424 47, 424 59, 424 61, 424 69, 424 701, 424 707, 424 7808, 424 7818, 424450, 424DIG5, 514844, 514845, 514944, A61K 748
Patent
active
059450959
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a cosmetic, dermatological, pharmaceutical or hygiene composition, in particular one to care for and/or make up the skin, which may be in the form of a cast product, a compact powder or any other form which is cosmetically acceptable, and comprising a dispersion of polymer particles in a liquid fatty substance, as well as to the use of such a dispersion in cosmetic compositions.
Cosmetic or dermatological compositions which may be applied to the skin or the lips as make-up or care product, such as lip bases, lipsticks or foundations, for example, generally contain fatty substances such as waxes, oils, pigments and/or fillers and, possibly, additives. It is known that the larger the amount of waxes present in the composition, the firmer is the consistency of this composition, thereby allowing its use in stick form. Compositions in the form of a flexible paste which can be applied using a brush, for example, are also known. These compositions generally contain a low amount of waxes, and fatty substances of pasty and/or oily type. The fatty substances of pasty type are generally present in large amounts, so as to obtain a composition whose consistency and viscosity are suitable for allowing it to be applied. However, it has been observed that these compositions have a certain capacity to migrate, that is to say a tendency to spread into the fine lines in the skin, in particular those around the lips, creating an aesthetically unpleasant effect, this migration being partly due to the presence of oily or pasty fatty substances. There is thus a need for a composition which migrates little after it has been applied to the skin and in the course of time.
The Applicant has observed, entirely surprisingly, that the use of a dispersion according to the invention in a cosmetic, dermatological, pharmaceutical or hygiene composition can allow a film of very good staying power to be obtained, which migrates little in the course of time, while at the same time being very pleasant to wear. This is particularly the case when the polymer in dispersion is a non-film-forming polymer, in particular one which is crosslinked.
Moreover, it has been observed that certain compositions according to the invention can conveniently soften the fine lines in the skin by camouflaging. Indeed, women, and even men, currently have a tendency to wish to appear young for as long as possible and consequently seek to soften the marks of ageing of the skin, which are reflected in particular by wrinkles and fine lines. It is common to combat the appearance of fine lines by treating the said wrinkles and fine lines with cosmetic products containing active agents which act on the skin, for example by moisturizing it or improving its cell renewal or alternatively by promoting the synthesis of collagen, of which the skin tissue is composed. Another possibility consists in masking or camouflaging fine lines which have already formed, for example using make-up products such as foundations or tinted creams.
However, the Applicant has observed, surprisingly and unexpectedly, that the use of a dispersion in a liquid fatty substance of surface-stabilized non-film-forming polymer particles, in a composition to be applied to the skin, can allow the "camouflaging" of wrinkles and fine lines which have already formed to be improved.
Without being bound by this explanation, it may be considered that when the composition is applied, the polymer particles in dispersion in the fatty substance will penetrate into the fine lines in the skin and thus camouflage them when the face is at rest. When the skin becomes deformed, for example during facial movements, the dispersion of polymer particles, which are not film-forming, will follow the movements of the face. The fatty substance of the dispersion, whose function is particularly to bind the particles together, as well as to bind them to the edges of the fine line, also referred to as the "lips" of the fine line, will ensure the adhesion and cohesion between the polymer particles and th
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patent: 5264207 (1993-11-01), Bommelaer et al.
patent: 5643581 (1997-07-01), Mougin et al.
Bara Isabelle
Mondet Jean
Mougin Nathalie
"L'Oreal"
Venkat Jyothsna
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