Skin care compositions containing light diffuser polymeric beads

Abstract

Disclosed are skin care compositions containing refractive polymeric particles. The composition improves the appearance of skin but reducing gloss without a noticeable presence on the skin surface.

1 . A skin care composition comprising:
 a delivery vehicle; and   polymeric beads, wherein   the refractive index of the polymeric material at or near the center of each individual polymeric bead is different than the refractive index of the polymeric material near the surface of the bead.   
     
     
         2 . The composition of  claim 1 , wherein the refractive index of the polymeric material at or near the center of the beads is greater than the refractive index of the polymeric material near the surface of the beads. 
     
     
         3 . The composition of  claim 1 , wherein the refractive index of the polymeric material at or near the center of the beads is less than the refractive index of the polymeric material near the surface of the beads. 
     
     
         4 . The composition of  claim 1 , wherein the refractive index of the polymeric material at any location within the individual beads is between about 1.4 and about 1.8 
     
     
         5 . The composition of  claim 1 , wherein the polymeric beads comprise a first polymeric bead and a second polymeric bead, wherein
 the refractive index of the polymeric material at or near the center of the first polymeric bead is greater than the refractive index of the polymeric material at or near the center of the second polymeric bead.   
     
     
         6 . The composition of  claim 1 , wherein about 90% or more of the polymeric beads have a particle diameter of about 0.5 micron to about 6 micron. 
     
     
         7 . The composition of  claim 1 , wherein the polymeric beads comprise a mixture of a first polymeric bead and a second polymeric bead, wherein
 about 90% or more of the first polymeric beads have a particle diameter of about 1.8 micron to about 2.2 micron: and   about 90% or more of the second polymeric beads have a particle diameter of about 4.8 micron to about 5.2 micron.   
     
     
         8 . The composition of  claim 7 , wherein the first polymeric bead comprises about 40% to about 90% of the polymeric beads by weight. 
     
     
         9 . The composition of  claim 1 , wherein the polymeric beads comprise a copolymer of butyl (meth)acrylate and allyl (meth)acrylate. 
     
     
         10 . The composition of  claim 1 , wherein the polymeric beads comprise a copolymer of methyl (meth)acrylate and ethyl (meth)acrylate. 
     
     
         11 . The composition of  claim 1 , wherein the polymeric beads comprise a mixture of polystyrene and a copolymer of butyl (meth)acrylate and divinyl benzene. 
     
     
         12 . The composition of  claim 1 , wherein the polymeric beads comprise a mixture of a first polymeric bead and second polymeric bead, wherein
 the first polymeric bead comprises a mixture of polystyrene and a copolymer of butyl acrylate and divinyl benzene; and   the second polymeric bead comprises a mixture of a copolymer of butyl acrylate and allyl methacrylate, and a copolymer of methyl methacrylate and ethyl acrylate.   
     
     
         13 . The composition of  claim 1 , wherein the delivery vehicle is a lotion, cream or ointment base. 
     
     
         14 . The composition of  claim 1 , wherein the delivery vehicle is a powder base. 
     
     
         15 . The composition of  claim 1 , further comprising one or more inorganic materials. 
     
     
         16 . The composition of  claim 4 , wherein the polymeric beads comprise a first polymeric bead and a second polymeric bead, wherein
 the refractive index of the polymeric material at or near the center of the first polymeric bead is greater than the refractive index of the polymeric material at or near the center of the second polymeric bead,   
     
     
         17 . The composition of  claim 4 , wherein the polymeric beads comprise a mixture of a first polymeric bead and a second polymeric bead, wherein
 about 90% or more of the first polymeric beads have a particle diameter of about 1.8 micron to about 2.2 micron; and   about 90% or more of the second polymeric beads have a particle diameter of about 4.8 micron to about 5.2 micron.   
     
     
         18 . The composition of  claim 5 , wherein the polymeric beads comprise a mixture of a first polymeric bead and a second polymeric bead, wherein
 about 90% or more of the first polymeric beads have a particle diameter of about 1.8 micron to about 2.2 micron; and   about 90% or more of the second polymeric beads have a particle diameter of about 4,8 micron to about 5.2 micron.   
     
     
         19 . The composition of  claim 2 , wherein the polymeric beads comprise a mixture of a first polymeric bead and a second polymeric bead, wherein
 about 90% or more of the first polymeric beads have a particle diameter of about 1.8 micron to about 2.2 micron; and   about 90% or more of the second polymeric beads have a particle diameter of about 4.8 micron to about 5.2 micron.   
     
     
         20 . The composition of  claim 19 , wherein
 the first polymeric bead comprises a mixture of polystyrene and a copolymer of butyl acrylate and divinyl benzene; and   the second polymeric bead comprises a mixture of a copolymer of butyl acrylate and allyl methacrylate, and a copolymer of methyl methacrylate and ethyl acrylate.