Copolymerized elastomeric block with a molecular architecture in a star, where the molecular architecture in star shape has at least two peaks of different star

摘要

Copolymerized elastomeric block with a molecular architecture in a star, where the molecular architecture in star shape has at least two peaks of different star, where at least one peak of the star structure based on at least one block A forming a hard phase and comprising polymerized units of at least one vinyl aromatic monomer and optionally at least one B block forms a first phase (soft) elastomer and comprising one or a plurality of diene monomers and at least one elastomeric block B / a which forms a soft phase and comprising polymerized units of both at least one vinyl aromatic monomer, as well as at least one diene, where the glass transition temperature Tg of the block B / a is less than 0 and the ratio the hard phase in the entire block copolymer in amounts of 1 to 40% by weight and the weight content of units based on at least one vinyl monomer aromatic amounts to at least 40% by weight.