Styrene copolymer and process for production thereof
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United States of America Patent
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Feb 21, 1995
Issued Date -
N/A
app pub date -
Jul 9, 1993
filing date -
Mar 31, 1989
priority date (Note) -
Expired
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Abstract
A styrene copolymer which comprises a styrene repeating unit (a) represented by the general formula (I): ##STR1## and an acrylonitrile repeating unit (b) represented by the general formula (II-(b)): ##STR2## unsaturated carboxylic acid or its ester repeating unit (c) represented by the general formula (II-(c)): ##STR3## or maleimide or N-substituted maleimide (d) represented by the general formula (II-(d)): ##STR4## (in the formula, symbols are the same as defined in the specification) wherein stereoregularity of the styrene repeating unit (a) chain is a high degree of syndiotactic configuration is disclosed.
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