Process for the preparation of thermoplastic elastomeric block copolymers derived from conjugated dienes and methyl methacrylate, with improved heat resistance, and products obtained

摘要

The process consists in polymerising the conjugated diene monomer in the presence of an anionic polymerisation initiator and of an apolar solvent and then polymerising methyl methacrylate monomer in the presence of an alkali metal alkoxyalcoholate ligand in the presence of the same solvent. Copolymers with elastomer and thermoplastic blocks are obtained which have a good heat resistance and are useful as pressure-sensitive adhesives and as agents for improving the impact strength and the heat behaviour of polymers.