Continuous preparation of rubber-modified polymers of...

Details Continuous preparation of rubber-modified polymers of... Continuous preparation of rubber-modified polymers of...

C - Chemistry, Metallurgy

08

F

400/1113, 400/30

C08F 279/02 (2006.01) C08F 255/10 (2006.01) C08F 287/00 (2006.01) C08F 291/02 (2006.01)

Patent

CA 1188021

Abstract of the Disclosure: A process for the continuous preparation of rubber-modified polymers of vinyl-aromatics, wherein a mixture which contains a monomeric aromatic vinyl compound and from 3 to 30% by weight, based on the monomer, of an elastomeric polymer, with or without a solvent, is polymerized, in the presence of a free radical initiator and in the presence or absence of a mercaptan as chain transfer agent,at from 80 to 180°C, with stirring, in two or more isothermally operated reaction zones, in such a way that the residence time of the reactants in the first reaction zone is ? 35 minutes. The polymer obtained is freed from vinyl-aromatic monomer, and from any solvent, in a devolatilization zone. The product is useful for the production of injection moldings.

391194

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