| abstract |
PROBLEM TO BE SOLVED: To provide a vinyl resin emulsion having a small variation in viscosity of an emulsion obtained for each production lot, and further excellent standing stability of the obtained emulsion and less odor. SOLUTION: A vinyl monomer having an active hydrogen-containing functional group as a protective colloid is subjected to emulsion polymerization, and the polymerization system is cooled to a temperature of 40 ° C. or less within 4 hours after the completion of the polymerization reaction. The hydrogen-containing functional group is preferably at least one selected from an acetoacetate group, a diacetone acrylamide group, a mercapto group, a group having a 1,2-glycol bond, and an amino group. |