METHOD FOR PREPARING CONJUGATED DIENE-BASED POLYMER AND METHOD FOR PREPARING GRAFT COPOLYMER COMPRISING THE SAME
申请人:LG CHEM, LTD.
公开号:US20210221935A1
公开(公告)日:2021-07-22
The present invention relates to a method for preparing a conjugated diene-based polymer, which includes a step of preparing a conjugated diene-based polymer by initiating and carrying out polymerization while continuously adding conjugated diene-based monomers to a reactor, and in which an emulsifier is dividedly added before the initiation of the polymerization and when a polymerization conversion rate of 31% to 80% is reached. More particularly, the present invention relates to: a method for preparing a conjugated diene-based polymer and a method for preparing a graft copolymer including the method for preparing a conjugated diene-based polymer, by which a total usage amount of an emulsifier can be reduced.