Patent ID: 7851063

Claim:
A polymer particle comprises a polymer resin comprising at least one crosslinking polymerizable monomer; a styrene-based monomer; and divinylbenzene, wherein said crosslinking polymerizable monomer comprises a monomer selected from the group consisting of allyl compounds, (poly)alkylene glycol di(meth)acrylates, (poly)dimethylsiloxane di(meth)acrylate, (poly)dimethylsiloxane divinyl, (poly)urethane di(meth)acrylate, pentaerythritol (meth)acrylates, methylolpropane (meth)acrylates, glycerol tri(meth)acrylate, and mixtures thereof and the polymer particle having a 10% K value (K value at 10% particle diameter compressive deformation) of about 250 to about 700 kgf/mm 2 and a compression recovery factor of about 30 to about 70%, wherein the polymer particle further has a 30% K value (K value at 30% compressive deformation) and a 40% K value (K value at 40% compressive deformation) of about 20 to about 70% of the 10% K value.