C - Chemistry – Metallurgy – 08 – F
Patent
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.
403275
Aliberti Vincent A.
Kruse Robert L.
Valcarce Eduardo M.
Mcfadden Fincham
Monsanto Company
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