Process for producing styrenic polymer

Details Process for producing styrenic polymer Process for producing styrenic polymer

1992-09-30

1994-04-26

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Removing and recycling removed material from an ongoing...

526 61, 526 88, 526151, 5263472, 526902, C08F 202, C08F 1208

Patent

active

053067908

ABSTRACT:
There is disclosed a process for continuously and efficiently producing a styrenic polymer having a high degree of syndiotactic configuration which comprises effecting polymerization reaction by continuously introducing a styrenic monomer and a polymerization catalyst into a polymerization reactor, the inside of which has been brought into fluidized state by particles previously fed therein, which process is characterized in that the polymerization reactor temperature is controlled by vaporizing a part of the styrenic monomer which has been introduced into the polymerization reactor, while the inside of the reactor is maintained under reduced pressure. According to the above process, such problems as difficulty in polymerization reactor scale-up, adhesion of polymer to the reactor inside and polymer particle agglomerate are simultaneously solved, and thereby the industrial significance of the process is remarkably enhanced.

REFERENCES:
patent: 3838139 (1974-09-01), Latinen
patent: 3859268 (1975-01-01), Novack et al.
patent: 4742131 (1988-05-01), Asanuma et al.
patent: 5037907 (1991-08-01), Imabayashi et al.

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