Mass polymerization process for grafted abs polyblends

Details Mass polymerization process for grafted abs polyblends Mass polymerization process for grafted abs polyblends

C - Chemistry, Metallurgy

08

F

400/2036, 400/30

C08F 297/04 (2006.01) C08F 279/04 (2006.01)

Patent

CA 1228687

MASS POLYMERIZATION PROCESS FOR GRAFTED ABS POLYBLENDS ABSTRACT The invention relates to a process for preparing ABS polymers by continuous mass polymerization wherein an alkenyl aromatic monomer having a diene rubber dissolved therein is charged continuously to a reactor simul- taneously with a separate feed-stream of an alkenyl nitrile monomer. The reactor is stirred to maintain, in the reaction mixture contained therein, a substantially uniform composition and operates at a steady state poly- mer solids level above that at which phase inversion occurs and up to about 70% polymer solids such that the diene rubber added is dispersed as rubber particles having a particle size of about 0.1 to 10 microns. A partially polymerized reaction mixture is continuously removed from the reactor and an ABS polymer is recovered therefrom.

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