Process for purification of styrenic polymer
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United States of America Patent
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Jun 20, 1995
Issued Date -
N/A
app pub date -
Nov 3, 1994
filing date -
Jan 28, 1991
priority date (Note) -
Expired
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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.
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