Continuous bulk polymerization in a planetary roller extruder

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 118/02 (2006.01)

Patent

CA 2600928

A process including the steps of: providing a planetary roller extruder having a plurality of compounding sections including a main spindle surrounded by and intermeshed with a plurality of planetary spindles; introducing monomers and initiator into a first compounding section; producing a homogeneous composition; heating the composition to initiate free-radical polymerization; introducing monomers and initiator into one or more of the remaining compounding sections and continuing the polymerization; discharging the polymerized composition; and optionally, taking a portion of the composition discharged from the planetary roller extruder and returning it to the first compounding section.

La présente invention concerne un procédé comprenant les étapes consistant à : fournir une extrudeuse à vis planétaires ayant une pluralité de sections de mélange comprenant une broche principale entourée par et enchevêtrée avec une pluralité de broches planétaires ; introduire des monomères et un initiateur dans une première section de mélange ; produire une composition homogène ; chauffer la composition de façon à initier la polymérisation radicalaire ; introduire les monomères et l'initiateur dans une ou plusieurs des sections de mélange restantes et poursuivre la polymérisation ; décharger la composition polymérisée ; et éventuellement, prendre une partie de la composition déchargée de l'extrudeuse à vis planétaires et la renvoyer dans la première section de mélange.

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