PURPOSE: To obtain titled polymer curable without any organic curing promotor, capable of giving cured products of high strength and heat deterioration resistance, by performing aqueous emulsion polymerization of chloroprene in the presence of specific amount of cyclic polysulfide compound followed by deflocculation of the polymer formed.
CONSTITUTION: A chloroprene polymer latex is first produced by performing aqueous emulsion polymerization of chloroprene in the presence of ≥0.1wt% based on said chloroprene, of a cyclic polysulfide compound (e.g. 1,2,3,4-tetrathiacychlohexane) using emulsifier and catalyst. Following that, a deflocculating liquor is added to she resultant latex to carry out a deflocculation followed by removing unreacted chloroprene by e.g. steam stripping then drying by e.g. lyophilization, thus obtaining the objective polymer.
ARIYOSHI TAKASHI
EMURA TOKUAKI
