Continuous mass polymerization process for abs polymeric polyblends

Abstract From the Canadian patent

This invention relates to a process for the continuous mass polymerization of a monomer formulation comprising at least principally a monoalkenylaromatic monomer and an ethylenically unsaturated nitrile monomer having dispersed therein a first grafted diene rubber to form a first partially polymerized mixture; dispersing a second grafted rubber in said first mixture forming a second partially polymerized mixture and polymerizing said second mixture to form a third partially polymerized mixture followed by devolatilization of said third mixture to form a polyblend of the polymer of said monomer and said dispersed grafted diene rubber having a bimodal particle size distribution. The process …