Styrene copolymer and process for production thereof

C - Chemistry – Metallurgy – 08 – F

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402/300, 402/408

C08F 212/08 (2006.01) C08F 212/04 (2006.01) C08F 212/10 (2006.01) C08F 220/02 (2006.01) C08F 220/44 (2006.01)

Patent

CA 2027587

ABSTRACT A styrene copolymer which comprises a styrene repeating unit (a) represented by the general formula (I): Image ... (I) and an acrylonitrile repeating unit (b) represented by the general formula (II-(b)): Image ... (II-(b)) unsaturated carboxylic acid or its ester repeating unit (c) represented by the general formula (II-(c)): Image ... (II-(c)) or maleimide or N-substituted maleimide (d) represented by the general formula (II-(d)): ... (II-(d)) Image (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. - 54 -

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