MODIFIED BLOCK COPOLYMERS AND PROCESSES FOR THE PREPARATION THEREFOR

摘要

MODIFIED BLOCK COPOLYMERS AND PROCESSES FOR THE PREPARATION THEREFOR Thermally stable, selectively hydrogenated monoalkenylaromatic hydrocarbon-conjugated diene block copolymers wherein at least one acid compound is grafted to the block copolymer at a secondary or tertiary carbon position and process for the preparation of such modified copolymers by a) melt-mixing a block copolymer and an acid moiety, adding a free radical initiator and graft-reacting under free radical conditions, or b) dissolving a block copolymer and an acid moiety in a suitable solvent, adding a free radical initiator and graft-reacting under free radical conditions.