Stable personal care cream composition

Patent metadata

Field	Value
Publication number	US-10556134-B2
Application number	US-201515532156-A
Country	US
Kind code	B2
Filing date	Nov 26, 2015
Priority date	Dec 2, 2014
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

The invention relates to a personal care cream composition, more particularly to a photo-protective composition that maintains its sensory properties while ensuring high sun-protection efficacy. The present inventors have herein determined that inclusion of hydrophobic polymer particles of a specified particle size range enables certain cream compositions to not only provide the sunscreen benefits but also deliver the excellent watery sensation the consumers have come to expect from such compositions.

First claim

The invention claimed is:

1. A personal care cream composition comprising
(a) 0.1 to 2% by weight of the composition, inorganic particles having a mean particle size in the range of 20 to 300 nm;
(b) 0.1 to 2% by weight of the composition, hydrophobic polymeric particles comprising polyethylene having a mean particle size in the range of 1 to 10 microns; and
(c) a cosmetically acceptable base comprising (i) 1 to 8% of fatty acid or an ester thereof, by weight of the composition; (ii) 0.05 to 1% of a cross-linked acrylic acid polymer, by weight of the composition; and (iii) water;
wherein the weight ratio of the fatty acid or ester thereof to the cross-linked acrylic acid polymer is in the range of 4:1 to 16:1; and
wherein the composition has a viscosity from 40,000 to 70,000 cps at 25° C. and the composition further comprises nonionic emulsifier.

2. The composition as claimed in claim 1 wherein the inorganic particle is selected from titanium dioxide, zinc oxide, mica, iron oxide, a pigment or combinations thereof and the nonionic emulsifier is a fatty alcohol ethoxylate.

3. The composition as claimed in claim 2 wherein the inorganic particle is titanium dioxide or zinc oxide.

4. The composition as claimed in claim 1 wherein said fatty acid or an ester thereof has 12 to 22 carbon atoms.

5. The composition as claimed in claim 1 comprising 2 to 5% by weight of the composition, fatty acid or ester thereof.

6. The composition as claimed in claim 1 comprising 0.1 to 1% by weight of the composition, cross-linked acrylic acid polymer.

7. The composition as claimed in claim 1 wherein hydrophobic polymer particle makes up from 0.3 to 1.8% by weight of the composition, the fatty acid or ester thereof has 14 to 18 carbon atoms, and further wherein the composition comprises mineral oil and the mineral oil is present at 1 to 5% by weight and/or the composition comprises silicone oil and the silicone oil is present at 0.1 to 2% by weight.

8. The composition as claimed in claim 1 additionally comprising an oily material selected from mineral oil, silicone oil or mixtures thereof.

9. The composition as claimed in claim 8 comprising 1-10% by weight of the composition of the oily material.

10. The composition as claimed in claim 1 additionally comprising fatty alcohol.

11. The composition as claimed in claim 10 comprising 0.1 to 2% by weight of the composition of a fatty alcohol.

12. The composition as claimed in claim 1 comprising 30 to 90% water by weight of the composition.

13. A method of providing photoprotection to skin comprising the step of applying the composition as claimed in claim 1 on to a desired surface of the skin.

14. The composition as claimed in claim 1 wherein the fatty ester comprises isopropyl myristate.

Assignees

• Conopco Inc

Inventors

• Liu Hongbo
• Liu Zhaoting
• Lou Anjing
• Wang Xiaoli
• Yang Nan

Classifications

• A61K8/8111 Primary

  Homopolymers or copolymers of aliphatic olefines, e.g. polyethylene, polyisobutene; Compositions of derivatives of such polymers · CPC title

• A61Q19/08

  Anti-ageing preparations · CPC title

• A61K2800/596

  Mixtures of surface active compounds · CPC title

• A61Q17/04 Primary

  Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations · CPC title

• A61K8/062

  Oil-in-water emulsions · CPC title