Block copolymers of monovinylaromatic and conjugated diene monomers.

摘要

Preparing a polymer comprises: sequentially contacting under polymerisation conditions and in the presence of a randomiser; (a) a monovinylaromatic monomer and an initiator; (b) an initiator and a monovinylaromatic monomer; (c) a conjugated diene;(d) an initiator and a mixt. of monovinylaromatic monomer and conjugated diene monomer; (e) a conjugated diene; and (f) a coupling agent; and wherein no more than three initiator charges are present. Also claimed are: Copolymers produced as above. Articles made from the above polymer.