Process for producing styrene-based polymers
AssigneeIdemitsu Petrochemichal Co., Ltd.
InventorsKoji Yamamoto, Kazutoshi Ishikawa, Hideki Imabayashi, Takashi Izumi
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Abstract
Disclosed is a process for producing a styrene-based polymer having syndiotactic configuration, which comprises continuously polymerizing styrene or styrene-based derivatives in a self-cleaning type reactor, while providing a sufficient shearing force to maintain a polydispersive state at a temperature of not more than 120.degree. C. According to the present invention, a styrene-based polymer having syndiotactic configuration can be produced efficiently and continuously, without adhesion of the polymer to the reactor and agitation blades.
Claims10
A process for producing a styrenic polymer having highly syndiotactic configuration comprising a first step of preliminarily polymerizing a styrenic monomer by the use of self cleaning reactor, while applying a sufficient shearing force to maintain a polydispersive state at 120.degree. C. or lower until the start of solid phase condition in the polymerization system and a second step of introducing the preliminarily polymerized product into a vessel reactor and proceeding with polymerization under the solid phase condition to enhance conversion to polymer.
Dependencies are inferred from the claim text.