| abstract |
(57) Abstract: An object of the present invention is to provide a novel polymerization method for a chloroprene polymer which controls the latex particle diameter, increases the polymerization rate, and is stable and excellent in productivity. A total of 100 parts by mass of a monomer containing 2-chloro-1,3-butadiene is 0.1 part by mass or more and 1 part by mass. Radical polymerization of a monomer mixture containing 2-chloro-1,3-butadiene in the presence of less than 0 parts by mass of an alcohol to produce a chloroprene polymer having a small latex particle diameter and a high polymerization rate. Invented a method. In particular, the alcohol is preferably a substantially water-insoluble alcohol having a solubility in water at 20 ° C. of 1 g / 100 g or less, and more preferably a saturated monohydric alcohol represented by the following formula (1). It is preferable because the polymerization rate can be further increased. Embedded image |