Styrene copolymer and process for producing the same

Details Styrene copolymer and process for producing the same Styrene copolymer and process for producing the same

C - Chemistry, Metallurgy

08

F

C08F 212/02 (2006.01) C08F 297/00 (2006.01) C08J 5/00 (2006.01) C08L 25/02 (2006.01)

Patent

CA 2542827

A styrene resin excellent in heat resistance, weatherability, melt stability, and suitability for recycling. It is a styrene copolymer obtained by living polymerization (Mw/Mn = 1.6-4.0) which comprises isopropenylaromatic units (A) contained in an amount of 5 to 95 wt.% and vinylaromatic units, and has a glass transition temperature (Tg) which satisfies a specific relationship defined by the content of isopropenylaromatic units (A) in the copolymer.

L'invention concerne une résine de styrène présentant une excellente résistance à la chaleur et aux intempéries, une excellente stabilité à la fusion, et une excellente adaptabilité au recyclage. Un copolymère de styrène obtenu par polymérisation in vivo (M¿w?/M¿n? = 1,6-4,0) comprend une quantité de 5 à 95 % en poids d'unités (A) isopropénylaromatiques et des unités vinylaromatiques, et présente une température de transition vitreuse (T¿g?) conforme à une relation spécifique définie par la quantité d'unités (A) d'isopropénylaromatiques du copolymère.

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