VESICLES OF HIGH MOLECULAR WEIGHT SILICONE POLYETHERS

• US 20100189667A1
• Filed: 01/26/2010
• Published: 07/29/2010
• Est. Priority Date: 04/20/2004
• Status: Abandoned Application

• Current Assignee: Shaow Lin
• Original Assignee: Shaow Lin
• Inventors: LIN, SHAOW
• Application Number:
  US12/693,581
• Publication Number:
  US 20100189667A1
• Time in Patent Office: Days
• US Class Current: 424/59
• CPC Class Codes: A61K 8/14 Liposomes; Vesicles
• CPC Class Codes: A61K 8/34 Alcohols
• CPC Class Codes: A61K 8/671 Vitamin A; Derivatives thereof, e.g. ester of vitamin A acid, ester of retinol, retinol, retinal
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin

Abstract

Vesicle compositions from high molecular weight silicone polyether copolymers, methods for preparing the vesicle compositions, and personal, household, and healthcare formulations containing the vesicle compositions are disclosed.

Claims

1. A process for making a vesicle composition comprising;

I) first combining,

A) 2 to 25 wt % of a silicone polyether copolymer having a structure represented by;

where R1 represents an alkyl group containing 1-6 carbon atoms;

R2 represents the group —

(CH₂)_aO(C₂H₄O)_b(C₃H₆O)_cR3;

x is 251-1,000;

y is 1-500;

z is 1-500;

a is 3-6;

b is 4-20;

c is 0-5;

and R3 is hydrogen, a methyl group, or an acyl group, and

B) 2 to 30 wt % of a water miscible volatile solvent,

then adding

C) water in a sufficient amount to provide the sum of the wt % of A), B), and C) to equal 100% to form an aqueous dispersion of the silicone polyether copolymer,

II) mixing the aqueous dispersion to form a vesicle composition having an average particle size of less than 0.500 micrometers,

III) optionally, removing the water miscible volatile solvent from the vesicle composition.

2. The process of claim 1 wherein the silicone polyether has the structure,

x is from 251 to 750, y is from 2 to 50, R1 is methyl,

R2 represents the group — (CH₂)_aO(C₂H₄O)_b(C₃H₆O)_cR3 where a is 3-6;

b is 4-20;

c is 0-5,and R3 is hydrogen, a methyl group, or an acyl group.

3. The vesicle composition produced by the process of claim 1.

4. The vesicle composition of claim 3 further comprising a personal, household, or healthcare active ingredient.