Leave-on compositions containing cellulose materials

Abstract

The compositions and methods of this invention relate to a leave-on skin care composition containing hydrophobic, linear cellulose particles having an average length of from about 1 to about 500 μm, a particle aspect ratio from about 2 to about 25 and an average thickness of from about 1 to about 500 μm; and a cosmetically acceptable carrier.

1 . A leave-on skin care composition, comprising: hydrophobic, linear cellulose particles having an average length of from about 1 to about 500 μm, a particle aspect ratio from about 2 to about 25 and a thickness of from about 1 to about 500 μm; and a cosmetically acceptable carrier. 
     
     
         2 . A leave-on skin care composition according to  claim 1  wherein said hydrophobic, linear cellulose particles have an oil absorption capacity and retention of from about 150 to about 500% weight oil/weight particles. 
     
     
         3 . A leave-on skin care composition according to  claim 2  wherein said oil absorption capacity and retention of said hydrophobic, linear cellulose particles is from about 300 to about 500% weight oil/weight particles. 
     
     
         4 . A leave-on skin care composition according to  claim 1  wherein the water contact angle of said hydrophobic, linear cellulose particles is greater than about 90 degrees. 
     
     
         5 . A leave-on skin care composition according to  claim 4  wherein said water contact angle is greater than about 100 degrees. 
     
     
         6 . A leave-on skin care composition according to  claim 4  wherein said water contact angle is greater than about 120 degrees. 
     
     
         7 . A leave-on skin care composition according to  claim 1  wherein said hydrophobic, linear cellulose particles are derived from cotton. 
     
     
         8 . A leave-on skin care composition according to  claim 7  wherein said hydrophobic, linear cellulose particles are regenerated cotton particles. 
     
     
         9 . A leave-on skin care composition according to  claim 1  wherein said hydrophobic, linear cellulose particles are rayon particles. 
     
     
         10 . A leave-on skin care composition according to  claim 1  wherein said hydrophobic, linear cellulose particles are coated with a hydrophobic agent selected from the group consisting of metal soap, organic wax, synthetic wax, long-chain fatty acids, long-chain fatty esters, non-water soluble polymers, high molecular water-insoluble fluoropolymers and polymerized siloxanes. 
     
     
         11 . A leave-on skin care composition according to  claim 1  wherein said composition further comprises an aqueous solvent. 
     
     
         12 . A leave-on skin care composition according to  claim 1  wherein said composition further comprises at least one emollient. 
     
     
         13 . A leave-on skin care composition according to  claim 1  wherein the size of said hydrophobic linear cellulose particles is from about 2 to about 300 μm. 
     
     
         14 . (canceled) 
     
     
         15 . A leave-on skin care composition according to  claim 1  wherein said composition comprises from about 1 to about 20 percent by weight of said hydrophobic, linear cellulose particles. 
     
     
         16 . A leave-on skin care composition according to  claim 1  wherein said composition comprises from about 1 to about 10 percent by weight of said hydrophobic, linear cellulose particles. 
     
     
         17 . A leave-on skin care composition according to  claim 1  wherein said composition comprises from about 1 to about 6 percent by weight of said hydrophobic, linear cellulose particles.