Composition comprising microcapsules containing reflective particles

Patent metadata

Field	Value
Publication number	US-10617609-B2
Application number	US-201515306931-A
Country	US
Kind code	B2
Filing date	Apr 30, 2015
Priority date	Apr 30, 2014
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

The instant invention relates to a composition for caring for and/or making up keratin materials comprising, in a physiologically acceptable medium, at least one microcapsule containing at least one encapsulated releasable material(s) said microcapsule comprising at least one core and at least one layered coating surrounding said core, and said encapsulated material(s) being at least one reflective particle, and being only released from said microcapsule(s) when said composition is applied onto a keratin material, such as keratin fibers or skin. The invention further relates to a cosmetic process for caring for and/or making up keratinic materials, comprising application on said keratinic materials in particular on the skin of a composition as defined above.

First claim

The invention claimed is:

1. A composition comprising, in a physiologically acceptable medium, a microcapsule comprising a core, a layered coating surrounding the core, and a reflective particle, wherein said layered coating comprising at least one inner layer surrounding the core and including the reflective particle, and one outer layer, wherein the reflective particle only is released from the microcapsule when the composition is applied onto a keratin material, wherein the microcapsule comprises from 5% to 80% by weight of the reflective particle relative to the weight of the microcapsule.

2. The composition according to claim 1 , wherein the reflective particle is in the form of flakes having a ratio die greater than 10.

3. The composition according to claim 1 , wherein the reflective particle is present in the core of the microcapsule.

4. The composition according to claim 1 , wherein the core of the microparticle comprises the reflective particle and a binder.

5. The composition according to claim 1 , wherein the reflective particle is present in the core of the microcapsule and in at least one inner layer.

6. The composition according to claim 1 , wherein the microcapsule comprises a layer comprising a binder.

7. The composition according to claim 1 , wherein the outer layer does not comprise the reflective particle.

8. The composition according to claim 1 ,
wherein the core comprises the reflective particle and optionally an organic material,
the layered coating comprises at least one binder selected from the group consisting of a polymer and a lipid-based material, and optionally a reflective particle which may be the same or different from the reflective particle contained in the core, and
the layered coating comprises an outer layer comprising a hydrophilic polymer.

9. The composition according to claim 1 ,
wherein the core comprises an organic material,
the layered coating comprises at least one binder selected from the group consisting of a polymer and a lipid-based material, and at least one reflective particle, and
the layered coating comprises an outer layer comprising a hydrophilic polymer.

10. The composition according to claim 9 , wherein the organic material is a monosaccharide or a derivative of a monosaccharide.

11. The composition according to claim 1 , wherein the layered coating surrounding the core comprises at least one hydrophilic polymer selected from the group consisting of:
acrylic or methacrylic acid homopolymers or copolymers or salts and esters thereof;
copolymers of acrylic acid and of acrylamide and its salts and esters thereof;
polyhydroxycarboxylic acids and its salts and esters thereof;
polyacrylic acid/alkyl acrylate copolymers;
AMPS;
AMPS; acrylamide copolymers;
polyoxyethylenated AMPS/alkyl methacrylate copolymers;
anionic, cationic, amphoteric or nonionic chitin or chitosan polymers;
cellulose polymers and derivatives;
Starch polymers and derivatives, eventually modified;
vinyl polymers and derivatives;
polymers of natural origins and derivatives thereof;
alginates and carrageenans;
glycoaminoglycans, hyaluronic acid and derivatives thereof; and
mucopolysaccharides.

12. The composition according to claim 1 , wherein the layered coating comprises at least one hydrophilic polymer selected from the group consisting of polysaccharides and derivatives, and acrylic or methacrylic acid homopolymers or copolymers or salts and esters thereof.

13. The composition according to claim 1 , wherein the layered coating comprises at least one hydrophilic polymer selected from the group consisting of starch or derivatives, and celluloses or derivatives.

14. The composition according to claim 1 , wherein the core comprises a monosaccharide polyol, and the coating comprises a polysaccharide or polysaccharide derivative comprising a D-Glucose unit.

15. The composition according to claim 1 , wherein the microcapsule further comprises a lipid based material.

16. The composition according to claim 1 , wherein the microcapsule comprises:
the core comprising the reflective particle and/or a monosaccharide-polyol,
at least two different layers,
a hydrophilic polymer, and
optionally a lipid based material.

17. The composition according to claim 1 , wherein:
the core comprises the reflective particle, a monosaccharide-polyol, a lipid based material and a hydrophilic polymer,
the layered coating comprises an inner layer comprising starch as a binder, a polymer selected from the group consisting of alkylacrylic/alkylmethacrylic acid copolymers and their derivatives, a lipid based material, a plasticizer, microcrystalline cellulose, hydroxypropylcellulose and optionally a reflective particle which may be the same or different from the reflective particle contained in the core, and
the layered coating comprises an outer layer comprising TiO 2 , a polymer and optionally a binder.

18. The composition according to claim 1 , wherein:
the core comprises the reflective particle, a monosaccharide-polyol, a lipid based material and a hydrophilic polymer,
the layered coating comprises an inner layer comprising a reflective particle, which may be the same or different from the reflective particle contained in the core, a monosaccharide-polyol, and a lipid based material, and
the layered coating comprises an outer layer comprising a lipid based material and a hydrophilic polymer.

19. The composition according to claim 1 , wherein at least one layer is obtained by a fluid bed process.

20. The composition according to claim 1 , wherein the reflective particle is at least one selected from the group consisting of
flake particles having at least two parallel faces that consist of a single material which is optically uniform;
multilayer interference pigments; and
diffractive pigments.

21. The composition according to claim 20 , comprising at least one multilayer interference pigment selected from the group consisting of nacres, reflective interference particles, and goniochromatic pigments.

22. The composition according to claim 1 , wherein the reflective particle is an inorganic particle coated with a metallic (poly)oxide(s).

Assignees

• Oreal

Inventors

• Shimizu Momoko
• Yu Qing

Classifications

• A61K8/345

  containing more than one hydroxy group · CPC title

• A61K8/042

  Gels · CPC title

• A61K2800/412

  Microsized, i.e. having sizes between 0.1 and 100 microns · CPC title

• A61K2800/621

  by inorganic compounds · CPC title

• A61K2800/26

  Optical properties · CPC title