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1. (WO2013125428) METHOD FOR PRODUCING ACRYLIC POLYMER PARTICLES

Pub. No.:    WO/2013/125428    International Application No.:    PCT/JP2013/053483
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Fri Feb 15 00:59:59 CET 2013
IPC: C08F 2/26
C08F 20/10
C08F 290/06
Applicants: DEXERIALS CORPORATION
デクセリアルズ株式会社
Inventors: NOMURA Mamiko
野村 麻美子
HIRAKAWA Manabu
平川 学
Title: METHOD FOR PRODUCING ACRYLIC POLYMER PARTICLES
Abstract:
According to the present invention, when producing acrylic polymer particles by discharging a monomer composition from a microchannel into an aqueous medium as microdroplets to create an emulsion with the monomer composition being a dispersed phase thereof, and heating the emulsion to radically polymerize an acrylic monomer, the flow rate of a monomer composition is increased and the time for producing particles is extended to a longer period than before. When producing acrylic polymer particles by discharging a monomer composition from a microchannel into an aqueous medium as microdroplets to create an emulsion with the microdroplets of the monomer composition being a dispersed phase thereof, and heating the emulsion to radically polymerize an acrylic monomer, the monomer composition to be used is adjusted to exhibit a water solubility such that the amount of the monomer composition dissolving in an aqueous layer is 35 mass% or more, the aqueous layer being obtained by stirring and mixing a 1 mass% aqueous solution of sodium dodecyl sulfate and the monomer composition at 25°C and at a mass ratio of 1:1 and then subjecting the mixture to centrifugation at a speed of rotation of 1500 rpm for 10 minutes.