Nanoparticle Compositions Providing Enhanced Color for Cosmetic Formulations

a technology of nanoparticles and cosmetic formulations, applied in nanotechnology, cosmetics, toilet preparations, etc., can solve the problems of cosmetic ingredients such as coloring agents, which provide the desired color and coverage, and have many limitations, so as to improve the aesthetic or natural appearance of a biological surface, and achieve unique optical effects on skin

US20140030300A1Inactive Publication Date: 2014-01-30AVON PROD INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2014-01-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to cosmetic, dermatological, and pharmaceutical compositions that deliver, in an acceptable vehicle or carrier comprising a film former or wax and an effective amount of nanoparticles and one or more pigments and methods for improving the appearance of a biological surface by altering the optical properties of the biological surface. The compositions of the invention enhance color and may be topically applied to the biological surface in an amount effective in improving the aesthetic and natural appearance of the biological surface.
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Description

FIELD OF THE INVENTION

[0001] The present invention generally relates to cosmetic, dermatological, and pharmaceutical compositions and their use. More particularly the present invention relates to cosmetic compositions and their use in improving the appearance of biological surfaces.BACKGROUND OF THE INVENTION

[0002] Modern skin care formulations must meet high standards of efficacy, skin compatibility and aesthetic appeal. Consumers are interested in mitigating or delaying the dermatological signs of chronologically-aged, hormonally-aged or photo-aged skin, such as fine lines, wrinkles, drying, and sagging skin, and other conditions due to a progressive degradation of the skin matrix. Consumers are interested in improving the appearance of, for example, skin, lips, nails, and hair by imparting to these biological surfaces a certain color, which would ideally produce an appearance of a uniform, lively, smooth and even surface, with no apparent imperfections. Therefore, there is a need f...

Examples

example

[0094]The following example describes specific aspects of the invention to illustrate the invention and provide a description of the present methods for those skilled in the art. The example should not be construed as limiting the invention, as the example merely provides specific methodology useful in the understanding and practice of the invention and its various aspects.

[0095]This example examines the effect of adding nanoparticles to a composition comprising a color pigment in the concentration enough to effectively create optical effects observed in the moth eye. A Gretag MacBeth Color Eye 7000A Spectrophotometer was used to quantify transmittance, reflection and absorbance (Absorbance=100−(Total Transmittance+SCI Reflection)).

[0096]Physical blends of compositions comprising nanoparticles were prepared using a speed mixer with silicone acrylate copolymer (KP 550 from Shin Etsu)—which is 40% polymer in isododecane (IDD). Solutions were cast on clean (optically transparent / colorl...