Process for purification of styrene polymer

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

1992-10-21

1994-06-14

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, 528497, C08F 608

Patent

active

053211227

ABSTRACT:
There is disclosed a process for purification of a styrene polymer, for purifying a styrene polymer having a high degree of syndiotacticity obtained by using a catalyst comprising (A) aluminoxane and (B) a transition metal compound containing no halogen, deashing the above styrene polymer with an alcoholic alkaline solution and then washing with an alcohol. Also disclosed is a process for purification of a styrene polymer which comprises deashing the above styrene polymer having been produced with a conversion rate of 60% or more after swelling it by adding an aromatic solvent and/or a styrene monomer.
According to the process of the present invention, a high purity styrene polymer can be obtained with good efficiency.

REFERENCES:
patent: 2216094 (1940-09-01), Britton et al.
patent: 4978730 (1990-12-01), Maezawa et al.

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