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US 8,198,350 B2Granted
Polymer-modified asphalt with a crosslinking agent and methods of preparing
AssigneeICL Performance Products LP
InventorsDarrell C. Fee, Rene Maldonado, Enrique E. Romagosa
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Abstract
Methods of preparing a cross-linked, polymer-modified asphalt is provided. The method involves adding a crosslinking agent to asphalt prior to the addition of a crosslinkable polymer and an acid. Asphalt prepared by the disclosed methods exhibit improved properties such as properties measured by the Multiple Stress Creep Recovery (MSCR) test.
Claims36
A method of preparing a cross-linked, polymer-modified asphalt, the method comprising the steps of:
- heating an asphalt;
- adding a crosslinking agent to the asphalt and mixing to form an asphalt-crosslinking agent mixture;
- and
- adding a crosslinkable polymer and an acid to the asphalt-crosslinking agent mixture;
- wherein following the addition of the crosslinking agent to the asphalt and the mixing to form an asphalt-crosslinking agent mixture, the acid is added and mixed with the asphalt-crosslinking agent mixture before the crosslinkable polymer is added and mixed with the asphalt-crosslinking agent mixture, thus forming a cross-linked, polymer-modified asphalt.
2 more elements
Dependencies are inferred from the claim text.