The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono...http://www.google.es/patents/US7067589?utm_source=gb-gplus-sharePatente US7067589 - Block copolymers and method for making same
