反应详情

A reaction vessel equipped with a stirring rod and a thermometer was charged with 683 parts by mass of water, 11 parts by mass of a sodium salt of sulfuric acid ester of methacrylic acid-ethylene oxide adduct (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 138 parts by mass of styrene, 138 parts by mass of methacrylic acid, and 1 part by mass of ammonium persulfate, and the resulting mixture was stirred for 15 minutes at 400 rpm to thereby prepare a white emulsion. The obtained emulsion was heated until the internal system temperature reached 75° C., and then was allowed to react for 5 hours. To the resultant, 30 parts by mass of a 1% by mass ammonium persulfate aqueous solution was further added, and the resulting mixture was aged for 5 hours at 75° C., to thereby obtain an aqueous dispersion liquid of a vinyl resin (a copolymer of styrene/methacrylic acid/a sodium salt of sulfuric acid ester of methacrylic acid-ethylene oxide adduct), i.e. Particle Dispersion Liquid 1.

1. customA reaction vessel equipped with a stirring rod
2. customto thereby prepare a white emulsion
3. temperatureThe obtained emulsion was heated until the internal system temperature
4. customreached 75° C.
5. customto react for 5 hours
6. waitthe resulting mixture was aged for 5 hours at 75° C.