Polymer particles having polymer brush and method of preparing the same

摘要

The present invention provides a method of preparing a polymer particle. More precisely, the invention provides a polymer particle having optimum impact strength and improved elastic recovery rate by forming the brush having softness on the surface of the monodisperse polymer particle by the anion dispersion polymerization using a conjugated diene monomer.

主权项

1. A method of preparing polymer particles comprising the following steps:
(a) loading a reaction solvent, monodisperse polymer particles having a mean diameter of 1-15 μm, and a chelating ligand in a reactor and regulating a temperature in the reactor to 50-80° C.; (b) reacting the surfaces of the monodisperse particles with an anion polymerization initiator; (c) grafting a brush onto the surfaces of the monodisperse polymer particles by anionic graft polymerization of a conjugated diene-based monomer; and (d) terminating the anionic graft polymerization with a polymerization terminator to obtain the polymer particles, wherein an additional step of eliminating a non-reacted anion polymerization initiator remaining in the reactor, is included between step (b) and step (c), and wherein the polymer particles have an impact strength ranging from about 361 kg/mm2 to about 390 kg/mm2 and an elastic recovery rate ranging from about 15% to about 18%.