Patent ID: 7148273

Claim:
A bituminous composition comprising: (I) a bituminous component, and (II) a block copolymer comprising at least two terminal blocks of a poly(monovinylaromatic hydrocarbon) and at least one block of a poly(conjugated diene), wherein (II) is a partially, selectively hydrogenated block polymer comprising butadiene as the conjugated diene, selectively hydrogenated by a process in which the ratio of hydrogenation of the 1,2 butadiene recurring units to the 1,4 butadiene recurring units is greater than 5 wherein the poly(conjugated diene) block has an initial content of 1,2-diene recurring units (A) in the range of 5–95 mol %, and, upon partial hydrogenation, the partially hydrogenated block polymer comprises less-tan 3 mol percent 1,2-diene recurring units (A) and less than 20 mol percent ethylene recurring units (D), calculated on the total content mol/mol of initial conjugated diene recurring nails.