Methacrylic Acid → Methacrylic Acid

Participants

Reaction Conditions

Reaction Steps

In a vessel equipped with a stirrer and a thermometer, 683 parts of distilled water, 11 parts of sodium salt of sulfate ester of methacrylic acid ethylene oxide adduct (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 83 parts of styrene, 83 parts of methacrylic acid, 110 parts of butyl acrylate, and 1 part of ammonium persulfate were charged and stirred at 400 rpm for 15 minutes. Then, the temperature of the solution was increased up to 75° C., and the solution was subjected to reaction for 5 hours. In the vessel, 30 parts of 1% ammonium persulfate was further added and matured at 75° C. for 5 hours to obtain a dispersion liquid of a copolymer of styrene-methacrylic acid-butyl acrylate-sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid. The volume average particle diameter of the dispersion liquid of fine resin particle, which was measured by a laser particle size distribution analyzer LA-920, was 105 nm. A part of the dispersion liquid of fine resin particle was dried to isolate a resin component, and then a glass transition temperature (Tg) and molecular mass of the resin component were measured. The resin component had a glass transition temperature (Tg) of 59° C. and a mass average molecular mass of 150,000.

Provenance & Evidence