Patent ID: 8835560

Claim:
An elastomeric block copolymer having star-shaped molecular architecture, where the star-shaped molecular architecture comprises at least two different arms, where at least one arm is composed of at least one block A which forms a hard phase and which comprises copolymerized units of at least one vinylaromatic monomer, and optionally of at least one block B which forms a first elastomeric (soft) phase and which comprises a, or a plurality of various, diene monomer(s), and of at least one elastomeric block B/A which forms a soft phase and which comprises copolymerized units not only of at least one vinylaromatic monomer but also of at least one diene, where the glass transition temperature T g of the block B/A is below 0° C., and the proportion of the hard phase, based on the entire block copolymer, is from 1 to 40% by weight, and the total proportion by weight of the units based on the at least one vinylaromatic monomer is at least 40% by weight.