Methacrylic Acid → Methacrylic acid ethylene oxide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

683 parts of water, 11 parts of the sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct (ELEMINOL RS-30, Sanyo Chemical Industries, Ltd.), 83 parts of styrene, 83 parts of methacrylic acid, 110 parts of butyl acrylate and 1 part of ammonium persulphate were introduced into a reaction vessel provided with a stirrer and thermometer, and stirred at 400 rpm/min for 15 minutes to give a white emulsion. This was heated, the temperature in the system was raised to 75° C. and the reaction performed for 5 hours. Next, 30 parts of an aqueous solution of 1% ammonium persulphate was added, and the reaction mixture matured and 75° C. for 5 hours to obtain an aqueous dispersion of a vinyl resin (copolymer of styrene-methacrylic acid-butyl acrylate-sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct), “particulate emulsion 1.” The volume average particle diameter of particulate emulsion 1 measured by LA-920 was 105 nm. After drying part of “particulate emulsion 1” and isolating the resin, Tg of the resin was 59° C. and the volume average molecular weight was 150000.

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