| abstract |
PROBLEM TO BE SOLVED: To provide a chloroprene polymer which, when stored in a metal container such as a tin can, obtains an adhesive whose discoloration degree after storage is remarkably suppressed. . SOLUTION: A 2-chloro-1,3-butadiene monomer or a 2-chloro-1,3-butadiene monomer and a monomer copolymerizable therewith are subjected to emulsion polymerization to prepare a chloroprene polymer or In the method for obtaining a copolymer, an emulsion obtained by previously dissolving and emulsifying a compound having a piperidyl group in a molecule in a chloroprene monomer is adjusted to a monomer conversion rate of 40% of a monomer conversion rate at which polymerization is stopped. This is a method for producing a chloroprene polymer to be added after reaching the time and before terminating the polymerization. |