公开(公告)号：US11028212B2

公开(公告)日：2021-06-08

申请号：US16324204

申请日：2017-08-01

Applicant: SHOWA DENKO K.K.

Inventor： Naoki Sekioka ,  Yuya Ohguma ,  Masanao Kamijo ,  Yoichiro Takenoshita

IPC: C08F279/02 ,  C08L51/04 ,  C09J151/04 ,  C09J111/02

Abstract: Provided is a method for producing a chloroprene graft copolymer latex containing no organic solvent and exhibiting high adhesive strength even for soft polyvinyl chloride. A method for producing a chloroprene graft copolymer latex includes a chloroprene polymerization step of giving a chloroprene polymer latex and a graft copolymerization step of giving a chloroprene graft copolymer latex. The chloroprene polymerization step is a step of subjecting at least chloroprene (A-1) of chloroprene (A-1) and a monomer (A-2) copolymerizable with chloroprene (A-1) to emulsion radical polymerization. The graft copolymerization step is a step of adding, to the chloroprene polymer latex, a (meth)acrylate (B) and an organic peroxide (C) having an octanol/water partition coefficient of −2.0 or more and 3.0 or less to subject the chloroprene polymer to graft copolymerization with the (meth)acrylate (B) at a temperature of 10° C. or more and 40° C. or less.