Process for preparing styrene-based (co)polymers

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 4/38 (2006.01) C08F 2/00 (2006.01) C08F 4/36 (2006.01) C08F 12/08 (2006.01) C08J 9/16 (2006.01)

Patent

CA 2706197

A process for preparing a styrene-based (co)polymer comprising the steps of: a) preparing a monomer composition comprising styrene monomer and optionally one or more co-monomers and b) polymerising the monomer composition in the presence of an initiator mixture containing (i) 55-95 wt% of at least one polyfunctional initiator having a 1-hour half-life temperature in the range of 70-110°C and (ii) 5-45 wt% of at least one monofunctional initiator having a 1-hour half-life temperature in the range of 70-110°C, so as to form the styrene-based (co)polymer.

L'invention concerne un procédé de préparation de (co)polymère à base de styrène comprenant les étapes suivantes : a) préparation d'une composition comprenant un monomère de styrène et, en option, un ou plusieurs co-monomères et b) polymérisation de la composition de monomères en présence d'un mélange d'initiateurs contenant (i) 55-95 % en poids d'au moins un initiateur polyfonctionnel ayant une température de demi-vie d'une heure dans l'intervalle de 70-110 °C et (ii) 5-45 % en poids d'au moins un initiateur monofonctionnel ayant une température de demi-vie d'une heure dans l'intervalle de 70-110 °C, de façon à former le (co)polymère à base de styrène.

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