Method and compositions for improving appearance of skin

• US 9,283,154 B2
• Filed: 03/25/2015
• Issued: 03/15/2016
• Est. Priority Date: 01/19/2010
• Status: Active Grant

• Current Assignee: ELC Management LLC (The Estee Lauder Companies Inc.)
• Original Assignee: ELC Management LLC (The Estee Lauder Companies Inc.)
• Inventors: Cohen, Isaac David, Cummins, Phillip, Sojka, Milan Franz, Culhane, David Walter, Fthenakis, Christina G., Sobel, Jennifer L., Dreher, John Dudley, Mikhaylova, Yelena
• Primary Examiner(s): Arnold, Ernst V
• Assistant Examiner(s): Song, Jianfeng
• Application Number:
  US14/668,139
• Publication Number:
  US 20150209244A1
• Time in Patent Office: 356 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61K 2800/262 Transparent; Translucent
• CPC Class Codes: A61K 2800/31 Anhydrous
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 2800/43 Pigments; Dyes
• CPC Class Codes: A61K 2800/651 The particulate/core comprising inorganic material
• CPC Class Codes: A61K 2800/654 The particulate/core comprising macromolecular material
• CPC Class Codes: A61K 2800/805 Corresponding aspects not provided for by any of codes A61K2800/81 - A61K2800/95
• CPC Class Codes: A61K 8/0241 Containing particulates characterized by their shape and/or structure see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes
• CPC Class Codes: A61K 8/0283 Matrix particles
• CPC Class Codes: A61K 8/18 characterised by the composition
• CPC Class Codes: A61K 8/19 containing inorganic ingredients
• CPC Class Codes: A61K 8/29 Titanium; Compounds thereof
• CPC Class Codes: A61K 8/8147 Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
• CPC Class Codes: A61K 8/8152 Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: A61Q 1/06 Lipsticks
• CPC Class Codes: A61Q 1/08 for cheeks, e.g. rouge
• CPC Class Codes: A61Q 1/10 for eyes, e.g. eyeliner, mascara
• CPC Class Codes: D06P 5/04 with organic compounds

Abstract

A method for making a composite particulate comprised of a colorant portion and a clear thermoplastic portion and cosmetic compositions containing the composite particulate.

Claims

1. A method for making a composite particulate in fused agglomerate form and which is not a collapsed microsphere having a portion comprised of at least one colorant and a portion comprised of at least one clear or translucent thermoplastic material comprising the steps of:

(a) combining one or more colorants in particulate form with polymethylmethacrylate (PMMA) in the form of solid spheres;

(b) adding solvent in an amount sufficient to swell the PMMA and cause the fused agglomerates of colorant and PMMA to form;

(c) removing the solvent and causing the mixture to dry,

(d) subjecting the dried mixture to milling to form fused agglomerates having a particle size ranging from 1 to 100 microns.

2. The method of claim 1 wherein the fused agglomerates of (d) are coated with a coating selected from the group consisting of silicone elastomers, silicone resins, silicone gums, synthetic or natural waxes and mixtures thereof.

3. The method of claim 2 wherein the coated fused agglomerates are sieved to remove particles larger than 45 microns.

4. The method of claim 1 wherein the solvent has a Hildebrand Solubility Parameter ranging from about 1 to 16 (calories/cm³)^1/2.

5. The method of claim 4 wherein the solvent is acetone, xylene, methylethyl ketone (MEK), dimethylformamide, dimethylchloride, trichloroethylene, trichloromethane, methanol, ethanol, isopropanol, ethyl acetate, butyl acetate, toluene, benzene, cyclohexane, amyl acetate, carbon tetrachloride, toluene, tetrahydrofuran, benzene, diacetone alcohol, ethylene dichloride, methylene chloride, DMSO, morpholine, cellosolve, pyridine, propanol;

or C_1-4 mono- or dialkyl ethers of ethylene glycol, or mixtures thereof.

6. The method of claim 5 wherein the solvent is ethanol.

7. The method of claim 1 wherein (a) 50 parts of colorant is combined with 50 parts PMMA.

8. The method of claim 7 wherein (b) 50 parts of solvent is added.

9. The method of claim 8 wherein the mixture of 50 parts colorant and 50 parts PMMA is exposed to 50 parts solvent for 1 to 10 hours.

10. The method of claim 1 wherein the colorant comprises a mixture of pigments and powders.