反应详情

A reactor equipped with a stirring rod and a thermometer was charged with 683 parts of water, 11 parts of sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 138 parts of styrene, 138 parts of methacrylic acid, and 1 part of ammonium persulfate. It was stirred at 400 rpm for 15 minutes, and white emulsion was obtained. It was heated such that a temperature in the system reached to 75° C. and was reacted for 5 hours. Further, after adding 30 parts of a 1-% aqueous solution of ammonium persulfate, it was aged at 75° C. for 5 hours, and [Fine Particles Dispersion 1] as an aqueous dispersion of a vinyl resin (a copolymer of styrene-methacrylic acid-sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid) was obtained. A volume-average particle diameter of [Fine Particles Dispersion 1] measured by LA-920 was 0.14 μm. A part of [Fine Particles Dispersion 1] was dried, and a resin component was isolated.

1. customA reactor equipped with a stirring rod
2. customwhite emulsion was obtained
3. temperatureIt was heated such that a temperature in the system
4. customreached to 75° C.
5. customwas reacted for 5 hours
6. waitwas aged at 75° C. for 5 hours