Methacrylic Acid → Sodium 4-styrenesulfonate

Participants

Reaction Steps

A 500-ml flask, the inner atmosphere of which was substituted with nitrogen, was charged with 0.07 g of a surface active agent (Emulgen 935 supplied by Kao-Atlas), 0.07 g of another surface active agent (Emulgen 920 supplied by Kao-Atlas), 0.3 g of sodium hydrogensulfite and 46.2 g of water, and the temperature was elevated to 40° C. with stirring in a nitrogen current. A liquid monomer mixture comprising 50 g of styrene, 50 g of n-butyl acrylate and 1 g of methacrylic acid, an aqueous solution of 4.9 g of sodium p-styrene-sulfonate having a purity of 82.0% (Spinomar NaSS supplied by Toyo Soda) in 45.1 g of water and an aqueous solution of a polymerization initiator formed by dissolving 0.5 g of ammonium persulfate in 49.5 g of water were added into the flask over a period of 3 hours and polymerization was carried out at 40° C. After completion of the addition, the polymerization temperature was maintained for 3 hours and the polymerization mixture was then cooled to room temperature.

Provenance & Evidence