Methacrylic Acid → Methacrylic acid ethylene oxide

Participants

Reaction Conditions

Reaction Steps

To a reaction vessel provided with a stirrer and a thermometer, 683 parts by mass of water, 11 parts by mass of sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 83 parts by mass of styrene, 83 parts by mass of methacrylic acid, 110 parts by mass of butyl acrylate, and 1 part by mass of ammonium persulphate were poured, and stirred at 400 rpm for 15 minutes to obtain a white emulsion. The white emulsion was heated, the temperature in the system was raised to 75° C. and the reaction was performed for 5 hours. Next, 30 parts by mass of an aqueous solution of 1% by mass ammonium persulphate was added, and the reaction mixture was matured at 75° C. for 5 hours to obtain an aqueous dispersion liquid of a vinyl resin (copolymer of styrene-methacrylic acid-butyl acrylate-sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct). This aqueous solution was taken as particulate emulsion 1. The volume average particle diameter of particulate emulsion 1 measured by a laser diffraction particle size distribution analyzer (LA-920, manufactured by HORIBA Instruments Inc.) was 105 nm. After drying part of particulate emulsion 1 and isolating the resin, the glass transition temperature (Tg) of the resin was 59° C. and the mass average molecular mass was 150,000.

Provenance & Evidence