Methacrylic Acid → Methacrylic acid ethylene oxide

Participants

Reaction Conditions

Reaction Steps

Into a reactor equipped with a stirring rod and a thermometer were poured 683 parts of water, 11 parts of sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid (trade name: 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; and the mixture was stirred at 3,800 rpm for 30 minutes to yield a white emulsion. The emulsion was heated to 75° C. and was allowed to react for 4 hours. The reaction mixture was further treated with 30 parts of a 1% aqueous solution of ammonium persulfate, was aged at 75° C. for 6 hours, thereby yielded an aqueous dispersion of vinyl resin i.e. a copolymer of styrene-methacrylic acid-butyl acrylate-sodium salt of sulfate ester of methacrylic acid-ethylene oxide adduct (hereinafter referring to as [Fine particles dispersion 1]). [Fine Particle Dispersion 1] had a volume-average particle diameter of 110 nm by the laser diffraction/particle size distribution analyzer LA-920 (manufactured by Horiba, Ltd.). A part of [Fine Particle Dispersion 1] was dried to isolate the resin component. The resin component had a Tg of 58° C. and a mass-average molecular mass of about 130,000.

Provenance & Evidence