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 method comprises polymerizing the conjugated diene monomer in the presence of an anionic polymerization initiator and an apolar solvent, and then polymerizing the methyl methacrylate monomer in the presence of an alkali metal alkoxy alkoxide ligand in the presence of the same. solvent. BR/ Elastomeric and thermoplastic block copolymers with good heat resistance are obtained which are useful as pressure-sensitive adhesives and as agents for improving the impact resistance and heat resistance of polymers. / P