| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for stably producing a polymer in slight variations of polymer conversion and polymerization temperature in continuously polymerizing a vinyl-based monomer by using a complete mixing type reaction vessel. SOLUTION: In this method for polymerizing a vinyl-based monomer by using a complete mixing type reaction vessel, the amount of a reaction mixture in the reaction vessel and the amount of a reaction raw material fed to the reaction vessel are adjusted so as to satisfy the equation (1): (Vmax-Vmin)/(Vmax+Vmin)<=0.05 and the equation (2) (qmax-qmin)/(qmax+ qmin)<=0.1 (Vmax and Vmin are the maximum fluid volume and the minimum fluid volume [kg] of the reaction mixture in the reaction vessel, respectively; qmax and qmin are the maximum value and the minimum value [kg/hr] of the reaction raw material fed, respectively) while taking out a fixed flow rate of a reaction mixture from the reaction vessel.
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