Silicone Vesicles

Abstract

A process for preparing a vesicle composition based upon mixing an organopolysiloxane having at least one hydrophilic substituent group, a water miscible volatile solvent, and water is disclosed. The vesicle compositions produced by the method are useful in various personal, household, and health care applications.

1 . A process for preparing a vesicle composition comprising; 
 I) combining 
 A) an organopolysiloxane having at least one hydrophilic substituent group,  
 B) a water miscible volatile solvent,  
 with water to form an aqueous dispersion,  
   II) mixing the aqueous dispersion to form vesicles,    III) optionally, removing the water miscible volatile solvent from the vesicles.    
   
   
       2 . The process of  claim 1  wherein the aqueous dispersion contains; 
 A) 5 to 50 wt % of the organopolysiloxane,    B) 5 to 50 wt % of the water miscible solvent,    C) sufficient amount of water to provide the sum of the wt % of A), B), and C) to equal 100 wt %.    
   
   
       3 . The process of  claim 1  wherein the organopolysiloxane is a silicone polyether.  
   
   
       4 . The process of  claim 1  wherein the organopolysiloxane is a silicone polyether having a structure represented by:  
     
       
         
         
             
             
         
       
       where R1 represents an alkyl group containing 1-6 carbon atoms;  
       R2 represents the group —(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3;  
       x is 1-1,000; 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.  
     
   
   
       5 . The process of  claim 1  wherein the silicone polyether has the structure,  
     
       
         
         
             
             
         
       
       x is from 1 to 1000, y is from 1 to 500, R1 is methyl,  
       R2 represents the group —(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3 where a is 3-6; b is 4-20; c is 0-5,and R3 is hydrogen, a methyl group, or an acyl group.  
     
   
   
       6 . The process of  claim 5  wherein the ratio of x/y is from 5/1 to 50/1.  
   
   
       7 . The process of  claim 1  wherein the water miscible volatile solvent is an alcohol.  
   
   
       8 . The process of  claim 1  wherein the water miscible volatile solvent is isopropyl alcohol.  
   
   
       9 . The product resulting from the process of  claim 1 .  
   
   
       10 . A personal, household, or health care product comprising the product of  claim 9.