Process for the continuous bulk production of high impact...

Details Process for the continuous bulk production of high impact... Process for the continuous bulk production of high impact...

C - Chemistry, Metallurgy

08

F

402/406, 402/453

C08F 2/02 (2006.01) B01J 19/18 (2006.01) C08F 210/06 (2006.01) C08F 212/06 (2006.01) C08F 220/42 (2006.01) C08F 236/04 (2006.01) C08F 279/02 (2006.01) C08F 279/04 (2006.01)

Patent

CA 2017353

Process for the continuous bulk production of high impact vinylaromatic copolymers in which the vinylaromatic monomer, eventually a vinyl-cyanide comonomer, the rubber, a part of the diluent solvent and the catalyst are premixed in a pre-mixer at a temperature under 100°C and fed to a plug-flow agitated tubular reactor, which is divided into several stages or zones. The mixture in excess is recycled to the premixer and the remaining part of the diluent solvent is injected on the top of the reactor to prevent the formation of incrustations. In the first zone of the reactor, the temperature and the residence time of the mixture are regulated so to have the halving of the catalyst life. The polymerization is carried on in the following zones of the reactor till at least the 40% by weight of solids and it is eventually brought to conclusion in one or more consecutive tubular reactors like the first one. The reactors are set in series.

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