SUSTAINED-RELEASE PARTICLE AND MANUFACTURING METHOD FOR SAME

摘要

A manufacturing method for a sustained-release particle 1 according to the present invention comprises: a core 2 obtained by mini-emulsion polymerization of a core raw material component that comprises a hydrophobic anti-bioactive compound and a hydrophobic first polymerizable vinyl monomer, the core 2 having a homogenous phase with the anti-bioactive compound being compatible with a first polymer obtained by polymerizing the first polymerizable vinyl monomer; and a shell 3 that is obtained by seeded emulsion polymerization of a shell raw material component having a hydrophobic second polymerizable vinyl monomer, wherein the core 2 is used as the seed, and that coats the core 2.