Methacrylic Acid → HCID 21092714, compound

Participants

Reaction Steps

A reaction container equipped with a stirrer, a reflux condenser, a thermometer and a nitrogen inlet pipe was charged with propylene glycol monomethyl ether acetate (PMA) as a solvent and azobisisobutyronitrile as a polymerization initiator. A solution containing methyl methacrylate (MMA), n-butyl acrylate (nBA) and methacrylic acid (MAA) was added dropwise to the reaction container under a nitrogen gas atmosphere to conduct a radical polymerization reaction with heating, thereby obtaining an MMA-nBA-MAA type resin 1. After completion of the reaction, PMA was removed by heating and drying under reduced pressure to obtain a resin 1 as solids. This resin 1 was neutralized with an aqueous solution of potassium hydroxide to obtain an aqueous solution having a solid content concentration of 20% by mass. Incidentally, the resin 1 was in a state dissolved in the aqueous solution, and so the 50% cumulative volume average particle size (D50) of the resin 1 could not be measured. The weight average molecular weight of the resin 1 in terms of polystyrene was 12,000. The glass transition temperature of the resin 1 was 80° C. The acid value of the resin 1 as measured by a neutralization titration method was 60 mg KOH/g.

Provenance & Evidence