Patent ID: 8461246

Claim:
A mixture of conjugated diene-vinyl aromatic hydrocarbon copolymers, comprising: 10 to 45 wt. % of a non-tapered di-block copolymer; 10 to 45 wt. % of a tapered di-block copolymer; and 10 to 80 wt. % of a non-tapered multi-block copolymer constituted of three or more blocks, wherein each of the non-tapered di-block copolymer, the tapered di-block copolymer and the non-tapered multi-block copolymer are polymerized from conjugated diene monomers and vinyl aromatic hydrocarbon monomers, wherein the wt. percentages are based on the total weight of the non-tapered di-block copolymer, the tapered di-block copolymer and the non-tapered multi-block copolymer.