Diene polymer solutions in aromatic vinyl monomers, used for the preparation of impact modified moulding materials

摘要

A method for the anionic polymerisation of dienes or the copolymerisation of dienes and aromatic vinyl monomers in an aromatic vinyl monomer (mixture) to form polydiene (mixed) homo- or copolymers (P) comprises carrying out (co)polymerisation in the presence of an alkyl or aryl polyvalent metal compound without the addition of a Lewis base. Also claimed are (i) solutions of (P) in aromatic vinyl monomers or monomer mixtures prepared by this method and (ii) a process for the continuous preparation of impact-modified thermoplastic moulding materials containing a soft diene polymer phase dispersed in a hard aromatic vinyl matrix.