| 摘要 |
Polymer particles provided with a superficial porous structure having on the surface a plurality of holes having a central diameter of 0.1 to 2 mum. The polymer particles comprise a vinyl-based polymer and a non-crosslinked polymer, and have a specific surface area of 0.1 to 5.0 m2/g and a volume-average particle size of 1 to 200 mum. |
