Semi-continuous integrated process for the production of...

C - Chemistry – Metallurgy – 08 – F

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C08F 279/02 (2006.01) C08F 2/06 (2006.01)

Patent

CA 2707984

Butadiene is anionically polymerized (or block copolimerized with styrene) in a low-boiling non-polar solvent in presence of rganolithiura compounds. At the end of the polymerization, the non- polar solvent is switched with styrene and the new solution is stored in tanks in relation to the type of polybutadiene (or its block copolymer with styrene) obtained. The polybutadiene solution (and/or its block copolymer with styrene) with the desired set of properties is then fed to a production plant of high impact vinyl aromatic (co) polymers.

La présente invention concerne un procédé selon lequel du butadiène est soumis à une polymérisation anionique (ou une copolymérisation bloc avec du styrène) dans un solvant non polaire à faible point d'ébullition en présence de composés d'organolithiura. À la fin de la polymérisation, le solvant non polaire est modifié avec du styrène et la nouvelle solution est stockée dans des réservoirs selon le type de polybutadiène (ou son copolymère bloc avec du styrène) obtenu. La solution de polybutadiène (et/ou son copolymère bloc avec du styrène) présentant un ensemble souhaité de propriétés est ensuite alimentée à une installation de production de (co)polymères aromatiques de vinyle à résistance élevée aux chocs.

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