Process for purification of styrenic polymer

Details Process for purification of styrenic polymer Process for purification of styrenic polymer

1994-11-03

1995-06-20

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528497, 528498, C08F 608

Patent

active

054261767

ABSTRACT:
There is disclosed a process for purifying a styrene polymer which comprises subjecting a highly syntiotactic styrene polymer which is produced by the use of a catalyst composition of (A) an aluminoxane or a specific coordination complex compound and (B) a transition metal compound to deashing treatment at the glass transition temperature of the styrene polymer or higher. The process is capable of efficiently deashing the styrene polymer produced by polymerizing a styrene monomer at a high concentration with a high conversion efficiency. Accordingly, the process greatly improves the productivity of highly pure styrene polymer.

REFERENCES:
patent: 5071953 (1991-12-01), Nakano et al.
patent: 5077367 (1991-12-01), Campbell, Jr. et al.
patent: 5247020 (1993-09-01), Nakano et al.
patent: 5270442 (1993-12-01), Nakano

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