Optical blurring pigment composition suitable for use in cosmetics

Patent metadata

Field	Value
Publication number	US-9968525-B2
Application number	US-74406108-A
Country	US
Kind code	B2
Filing date	Nov 14, 2008
Priority date	Dec 27, 2007
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

Compositions comprising a gel system made from a combination of a fractal network of nanoparticles and translucent macroscopic particles, titanium dioxide and other color pigments is disclosed. The compositions are capable of forming an effective film on the biological surface such as skin to blurring fine lines and wrinkles while retaining a natural look of the skin as a consequence of synergy between the fractal particles, the macroscopic particles, titanium dioxide and color pigments. Also disclosed methods for their use.

First claim

The invention claimed is:

1. A cosmetic composition comprising
(a) a fractal network of nanoparticles dispersed in a medium such that cohesive interactions among the nanoparticles are greater than adhesive interactions between the nanoparticles and the medium;
(b) elastomeric macroscopic particles that are translucent;
(c) titanium dioxide; and
(d) one or more color pigments other than titanium dioxide,

wherein the titanium dioxide weight percent of the total composition ranges between about 0.5% and 4.0%, and wherein the composition produces a diffused transmittance of greater than 55% when applied onto a biological surface.

2. The cosmetic composition of claim 1 , wherein the nanoparticles are inorganic nanoparticles having a particle size ranging from about 40 to 900 nanometers and a refractive index ranging from about 1.38 to about 2.

3. The cosmetic composition of claim 2 wherein the inorganic nanoparticles are silica, alumina, titania, zirconia, zinc oxide, indium tin oxide, ceria, or mixtures thereof, and wherein the elastomeric macroscopic particles are silicone elastomers, silicone crosspolymers, hydrocarbon elastomers, natural and synthetic rubbers, polymeric spheres, or compatible combinations thereof.

4. The composition of claim 3 wherein the polymeric spheres are fluoropolymers, polyacrylates, polyesters, cellulose beads, polyurethanes, polyacrylic esters, polyethers, polyamides, polyesteramides, or mixtures thereof.

5. The cosmetic composition of claim 3 wherein the composition contains at least about 3% and less than 60% nanoparticles by weight of the composition.

6. The cosmetic composition of claim 3 wherein the elastomeric macroscopic particles are silicone elastomers, silicone crosspolymers, hydrocarbon elastomers, polymeric spheres, or combinations thereof.

7. The cosmetic composition of claim 6 wherein the elastomeric macroscopic particles are cross-linked silicone elastomers derived from vulcanizable silicone sealant chemistry, addition-polymerized silicone elastomers prepared by the hydrosilylation of olefins or olefinic silicones with silyl hydrides, or silicone crosspolymers obtained by self polymerization of bifunctional precursor molecules containing epoxy-silicone and silyl hydride functionalities in the absence of crosslinker molecules.

8. The cosmetic composition of claim 7 wherein the silicone crosspolymers are dimethicone/vinyl dimethicone crosspolymers, vinyl dimethicone/lauryl dimethicone crosspolymers, alkyl ceteayl dimethicone/polycyclohexane oxide crosspolymers, or combinations thereof.

9. The cosmetic composition of claim 6 wherein the elastomeric macroscopic particles have a refractive index ranging from about 1.38 to about 1.6.

10. The cosmetic composition of claim 9 wherein the cosmetic composition further comprises an active agent.

11. The cosmetic composition of claim 10 wherein the active agent is a sunscreen, at least one light absorbing agent, or compatible combinations thereof.

12. The cosmetic composition of claim 1 , wherein the color pigments are ferric oxide, ferrous oxide, yellow iron oxide, red iron oxide, bismuth oxy chlorides, black iron oxide, acylglutamate iron oxides, chromium oxide, chromium hydroxide, manganese violet, cerium oxide, ultramarine blue lakes, carmine lakes, barium lakes, strontium lakes, calcium lakes, aluminum lakes, carbon black, derivatives or mixtures thereof.

13. The cosmetic composition of claim 1 , wherein the fractal network of nanoparticles comprises more than one type of nanoparticles, and the more than one type of nanoparticles form more than one fractal network.

14. The cosmetic composition of claim 3 wherein the gel system further comprises a nonaqueous solvent, wherein the nonaqueous solvent is silicone oils, non-silicone organic oils, or mixtures thereof.

15. The cosmetic composition of claim 3 further comprising a solvent in which the elastomeric macroscopic particles are dispersed, and wherein the refractive index of the nanoparticles does not match the refractive index of the elastomeric macroscopic particles.

16. The cosmetic composition of claim 4 , wherein the gel system is a nonaqueous dispersion of first nanoparticles and second nanoparticles.

17. The cosmetic composition of claim 16 , wherein the first nanoparticles are alumina and the second nanoparticles are silica.

18. The cosmetic composition of claim 1 , wherein the titanium dioxide and other color pigments total weight percent of the composition is ranging between about 1% and about 10%.

19. The cosmetic composition of claim 1 , wherein the color pigments total weight percent of the composition is ranging between about 0.5% and about 9.5%.

20. A cosmetic composition comprising:
a) a fractal network of nanoparticles having a particle size ranging from about 40 to 900 nanometers and a refractive index ranging from about 1.38 to about 2, wherein the nanoparticles are present in amount of about 3% to about 60% by weight of the composition and are selected from the group consisting of alkyl substituted fumed silica, fumed silica, colloidal silica, fumed alumina, fumed titania, and combinations thereof, wherein the nanoparticles are dispersed in a medium such that cohesive interactions among the nanoparticles are greater than adhesive interactions between the nanoparticles and the medium;
b) translucent elastomeric macroscopic particles having a particle size ranging from about 1 to about 200 microns and a refractive index ranging from about 1.38 to about 1.6, the refractive index of the nanoparticles not matching the refractive index of the elastomeric macroscopic particles;
c) titanium dioxide having particle size ranging from about 0.5 microns to about 1.5 microns, and present in an amount of between about 0.5% and about 4.0% weight of the composition;
d) one or more color pigments other than titanium dioxide having particle size ranging from about 0.1 microns to about 50 microns, and present in an amount of between about 0.5% and about 9.5% weight of the composition; and
e) at least one cosmetic active agent or adjuvant;
wherein the composition produces a diffused transmittance of greater than 55% when applied onto a biological surface.

21. The cosmetic composition of claim 20 wherein the elastomeric macroscopic particles are silicone elastomers, hydrocarbon elastomers, silicone crosspolymers, or combinations thereof.

22. A cosmetic composition comprising (a) a fractal network of nanoparticles dispersed in a medium such that cohesive interactions among the nanoparticles are greater than adhesive interactions between the nanoparticles and the medium; (b) translucent elastomeric macroscopic particles; (c) titanium dioxide; (d) one or more color pigments other than titanium dioxide; and (e) a nonaqueous solvent, wherein the titanium dioxide weight percent of the total composition ranges between about 0.5% and 4.0%, the refractive index of the nanoparticles not matching the refractive index of the elastomeric macroscopic particles, and wherein the composition produces a diffused transmittance of greater than 55% when applied onto a biological surface.

23. The cosmetic composition of claim 22 wherein the nanoparticles are alkyl substituted fumed silica, fumed silica, colloidal silica, fumed alumina, fumed titanic, or mixtures thereof.

24. The cosmetic composition of claim 23 wherein the elastomeric macroparticles are silicone elastomers, hydrocarbon elastomers, silicone cros

Assignees

• Dingley Ajay G
• Fair Michael J
• Glynn Jr John R
• Sandstrom Giovana A
• Avon Prod Inc

Inventors

• Dingley Ajay G
• Fair Michael J
• Glynn Jr John R
• Sandstrom Giovana A

Classifications

• A61K8/042 Primary

  Gels · CPC title

• A61K2800/31

  Anhydrous · CPC title

• A61Q1/02

  Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12) · CPC title

• A61K2800/262

  Transparent; Translucent · CPC title

• A61K8/29

  Titanium; Compounds thereof · CPC title