Patent ID: 8063142

Claim:
A polymer nanoparticle composition comprising nanoparticles with a size distribution between about 1 nm and 1000 nm, and a polydispersity index between about 1.5 and about 10, wherein said nanoparticles include: a. an outer layer including first monomer units selected from the group consisting of alkenylbenzenes, conjugated dienes, alkylenes, and mixtures thereof, and b. an inner layer including second monomer units comprised of an alkenylbenzene, wherein said nanoparticles are comprised of said second monomer units and said first monomer units, in a ratio of said second monomer units to said first monomer units greater than 1:1, and include mono-block and diblock polymer chains, and wherein said nanoparticles have a size distribution that is polymodal.