Patent ID: 8895645

Claim:
A process for preparing a modified asphalt composition, the process comprising introducing a molten asphalt composition and introducing from about 0.1 to about 10 parts by weight, per 100 parts by weight of the modified asphalt composition, of a linear diene end-capped copolymer defined by the formula: α-(D-V-d) x where each D is independently a polydiene block, each V is independently a vinyl aromatic block, each d is a polydiene end cap, α is a coupling moiety, and x is 2; where α is the residue of a coupling agent defined by the formula R 1 n M 1 X 4-n , where each R 1 is a monovalent organic group, M 1 is tin, silicon, or germanium, X is a halogen atom, and n is 2; and where the coupling agent is a dichlorosilane selected from the group consisting of diphenyldichlorosilane, dihexyldichlorosilane, dioctyldichlorosilane, dibutyldichlorosilane, and dimethyldichlorosilane.