Cosmetic composition with increased opacity

Patent metadata

Field	Value
Publication number	US-10071029-B2
Application number	US-201415027716-A
Country	US
Kind code	B2
Filing date	Oct 9, 2014
Priority date	Oct 15, 2013
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A cosmetic composition is disclosed comprising particle active; opacifying particles having a refractive index of at least 1.7 and cosmetically acceptable carrier. The particle active comprises (i) water-insoluble shell component comprising inorganic material and having a refractive index of from 1.3 to 1.8; and (ii) core component comprising volatile liquid and having a refractive index of at least 1.2.

First claim

The invention claimed is:

1. A cosmetic composition in the form of a paste, gel, liquid or monolithic solid and comprising:
a. particle active, wherein the particle active comprises:
i. a water-insoluble shell component comprising inorganic material and having a refractive index (n s ) of from 1.3 to 1.8 at 25 degrees Celsius and a wavelength of 589 nm, wherein the particle active has a particle size (D) of at least 500 nm and less than 2 microns;
ii. a fluid core component comprising:
1) at least one of
at least one volatile silicone and
at least one C1-C5 alcohol, and

2) at least 75% water by weight of the fluid core component,
wherein the fluid core component has a refractive index (n c ) of at least 1.2 at 25 degrees Celsius and a wavelength of 589 nm; and

iii. 0.001 to 10 wt % opacifying particles having a refractive index of at least 1.7 at 25 degrees Celsius and a wavelength of 589 nm, wherein the opacifying particles are selected from the group consisting of: bismuth oxy-chloride, boron nitride, titanium dioxide, zirconium oxide, aluminium oxide, zinc oxide and combinations thereof; and

b. cosmetically acceptable carrier.

2. The cosmetic composition as claimed in claim 1 wherein the composition is a cream or lotion.

3. The cosmetic composition as claimed in claim 1 wherein the inorganic material is inorganic polymer, selected from the group consisting of: silica, organically-modified silica, and a combination thereof.

4. The cosmetic composition as claimed in claim 3 wherein the inorganic polymer is obtained by a sol-gel process.

5. The cosmetic composition as claimed in claim 1 wherein the shell component has a thickness (L) obeying the following relationship (I):
L≥ 150 nm−0.25× D   (I).

6. The cosmetic composition as claimed in claim 1 wherein the shell is permeable to water.

7. The cosmetic composition as claimed in claim 1 wherein the ratio of the refractive index of the core to the refractive index of the shell (n c /n s ) is from 0.7 to 1.2 at 25 degrees Celsius and a wavelength of 589 nm.

8. The cosmetic composition as claimed in claim 1 wherein the opacifying particles have a refractive index from 2.0 to 2.7 at 25 degrees Celsius and a wavelength of 589 nm.

9. The cosmetic composition as claimed in claim 1 wherein the composition comprises yellow pigment.

10. The cosmetic composition as claimed in claim 1 wherein the carrier comprises hydrophobic material.

11. The cosmetic composition as claimed in claim 10 wherein the hydrophobic material comprises less than 15% liquid oil by weight of the composition.

12. The cosmetic composition as claimed in claim 10 wherein the hydrophobic material comprises 1 to 25% fatty acid by weight of the composition, 0.1 to 80% soap by weight of the composition, or a mixture thereof.

13. The cosmetic composition as claimed in claim 1 wherein the ratio of the refractive index of the core to the refractive index of the shell (n c /n s ) is from 0.9 to 1.0 at 25 degrees Celsius and a wavelength of 589 nm.

14. The cosmetic composition as claimed in claim 10 wherein the hydrophobic material comprises liquid oil in an amount of from 0.01 to 10% by weight of the composition.

15. A method for improving one or more skin characteristics comprising the steps of:
I. providing a composition as claimed in claim 1
II. topically applying the composition to skin; and
III. allowing the volatile liquid to evaporate from the particle active.

Assignees

• Conopco Inc

Inventors

• Hudelist Florian
• Li Yajuan
• Liu Zhaoting
• Meng Sheng
• Qiu Qiang
• Wang Lin
• Wang Xiaoli
• Wu Chunwei

Classifications

• A61K8/29

  Titanium; Compounds thereof · CPC title

• A61K2800/26

  Optical properties · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title

• A61Q1/02

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

• A61K8/25

  Silicon; Compounds thereof · CPC title