Process for producing a styrene-based polymer.

摘要

Disclosed is a process for producing a styrene-based polymer having a high syndiotactic configuration, which comprises polymerizing a styrene-based monomer with addition of catalyst in such amounts that the conversion at 30 minutes after the polymerization starts becomes 2 to 50%, and then continuing the polymerization with additions of the catalyst when the conversion exceeds 10%. According to the process, the productivity can be improved while easily attaining safe running of the reactor and successful controlling of reaction heat.