| http://www.w3.org/ns/prov#value | - -B multiblock copolymers, and radial or teleblock copolymers of the formula (A-B)n-Y wherein A comprises a polystyrene block, B comprises a substantially rubbery polybutadiene or polyisoprene block, Y comprises a multivalent compound, and n is an integer of at least 3, and mixtures of said substances. 45.
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