Process for purification of syndiotactic styrene polymer

Details Process for purification of syndiotactic styrene polymer Process for purification of syndiotactic styrene polymer

1994-03-21

1995-05-30

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528495, C08F 628

Patent

active

054202400

ABSTRACT:
A process for the purification of a styrene polymer having a high degree of syndiotactivity. The styrene polymer is obtained by carrying out polymerization with a catalyst comprising (A) an aluminoxane and (B) a transition metal compound, which does not contain halogen. The styrene polymer is deashed with an alcoholic alkaline solution and then washed with an alcohol.

REFERENCES:
patent: 2216094 (1940-09-01), Britton et al.
patent: 4978730 (1990-12-01), Maezawa et al.
patent: 5077367 (1991-12-01), Campbell, Jr. et al.
patent: 5247020 (1993-09-01), Nakano et al.

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