Patent ID: 11958922
Assignee: SEKISUI PLASTICS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 11:
12. A method for producing the vinyl-based resin particles according to claim 1, the method comprising:
an emulsion polymerization step of emulsion-polymerizing a second polymerizable vinylic monomer in an aqueous medium to obtain an aqueous dispersion containing polymer particles of the second polymerizable vinylic monomer and the aqueous medium;
a spray-drying step of spray-drying the aqueous dispersion obtained in the emulsion polymerization step at an inlet temperature of 80 to 220° C. and an outlet temperature of 50 to 100° C. to obtain an aggregate; and
a crushing step of crushing the aggregate obtained in the spray-drying step to obtain vinyl-based resin particles.