Sulfate Ion → Sulfate Ion

Participants

Reaction Steps

A reactor to which a stirring rod and a thermometer was set was charged with 683 parts of water, 11 parts of a sodium salt of sulfate of methacrylic acid ethylene oxide adduct (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 138 parts of styrene, 138 parts of methacrylic acid, and 1 part of ammonium persulfate, which was stirred at 400 rpm for 15 minutes, and a white emulsion was obtained. This was heated until a temperature in the system reached 75° C. and reacted for 5 hours. Further, it was added with 30 parts of a 1-% ammonium persulfate aqueous solution and aged at 75° C. for 5 hours, and an aqueous dispersion of a vinyl resin (a copolymer of styrene—methacrylic acid—sodium salt of sulfate of methacrylic acid ethylene oxide adduct) [fine particles dispersion 1] was obtained. A volume-average particle diameter of the obtained [fine particles dispersion 1] was measured with LA-920 (manufactured by Horiba Ltd.) and found to be 0.14 μm. A part of [fine particles dispersion 1] was dried and the resin content was isolated.

Provenance & Evidence