| 摘要 |
<p>A process for producing a methacrylic polymer comprising: a step in which bulk polymerization is conducted in one complete mixing type reactor at a temperature of 110 to 160 °C using a chain transfer agent in a specific concentration and a free-radical initiator having a specific half-life so as to result in a polymer content of 35 to 65 wt.%; a step in which the reaction mixture is continuously discharged from the reactor and sent through a plug flow type reactor while pressurizing the mixture at or above a given value throughout the reactor; a step in which the reaction mixture is passed through a plug flow type reactor having a specific inner-wall temperature while polymerizing the mixture using a free-radical initiator having a specific half-life so as to result in a polymer content at the outlet of 50 to 85 wt.%; and a subsequent step in which volatiles are continuously removed from the reaction mixture. By the process, a methacrylic polymer having excellent moldability can be efficiently produced.</p> |
