Process for the continuous production in solution of styrene thermoplastic resins.

摘要

Process for the continuous production in solution of styrene thermoplastic resins by polymerization of a vinyl-aromatic monomer and a vinyl-nitrile monomer in the presence of an elastomer and of a starter, wherein polymerization is conducted in two or more steps, wherein the elastomeric component is fed, in solution in the solvent and/or in the monomers, to the first step, polymerization is carried out in the subsequent steps at temperatures ranging from 70 DEG to 150 DEG C, in each step the reaction mass is gently and homogeneously stirred and the reaction product is caused to flow to a thin film evaporator heated at 150 DEG -300 DEG C.