Methacrylic Acid → Methacrylic acid ethylene oxide

Participants

Reaction Conditions

Reaction Steps

To a reaction vessel provided with a stirrer and a thermometer, 683 parts of water, 11 parts of sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 80 parts of styrene, 83 parts of methacrylic acid, 110 parts of butyl acrylate, 12 parts of butyl thioglycollate, and 1 part of ammonium persulphate were introduced, and stirred at 400 rpm/minute 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 of an aqueous solution of 1% 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 mean particle diameter of the “particulate emulsion 1” measured by a laser diffraction particle size distribution analyzer (LA-920, manufactured by SHIMADZU Corp.) was 120 nm. After drying part of “particulate emulsion 1” and isolating the resin, the glass transition temperature (Tg) of the resin was 42° C. and the weight average molecular weight was 30,000.

Provenance & Evidence