Modified asphalt binders and asphalt paving compositions
AssigneesFirestone Polymers, LLC, Heritage Research Group
InventorsWilliam Hergenrother, Peter Boerner, Daniel Graves, Christine Rademacher, Timothy Reece, Herbert Wissel
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Abstract
A process for preparing a modified asphalt binder composition, the process comprising mixing asphalt, an unsaturated polymer, and phosphorus pentasulfide to form a modified asphalt composition.
Claims70
A process for preparing a modified asphalt binder composition, the process comprising:
- mixing asphalt, an unsaturated polymer, and phosphorus pentasulfide to form a modified asphalt composition.
A process for preparing a modified asphalt binder composition, the process comprising:
- mixing asphalt binder, polymer, and phosphorus pentasulfide to form a modified asphalt composition, where the weight ratio of polymer to phosphorus pentasulfide is at least 0.5:1 and less than 8:1.
A process for preparing a modified asphalt binder composition the process comprising:
- introducing an polymer to an asphalt binder;
- and
- introducing phosphorus pentasulphide to an asphalt binder, where said step of introducing phosphorus pentasulfide to the asphalt includes adding a phosphorus pentasulfide composition that includes less 5% by weight hydrocarbon material.
A method for forming a modified asphalt binder composition, the method comprising:
- preparing a phosphorus pentasulfide-binder concentrate by introducing and mixing phosphorus pentasulfide and asphalt binder, where the phosphorus pentasulfide-binder concentrate includes greater than 0.5 parts by weight phosphorus pentasulfide per 100 parts by weight asphalt;
- preparing a polymer-binder concentrate by introducing and mixing polymer and asphalt binder, where the polymer-binder concentrate includes greater than 5 parts by weight polymer per 100 parts by weight asphalt;
- and
- introducing and mixing the phosphorus pentasulfide-binder concentrate with the polymer-binder concentrate to form a modified asphalt binder composition.
A modified asphalt binder composition comprising the combination or the reaction product of:
- an asphalt, phosphorus pentasulfide, and an unsaturated polymer.
A modified asphalt binder composition prepared by a process comprising:
- introducing and mixing an asphalt, phosphorus pentasulfide, and polymer, where the weight ratio of the polymer to the phosphorus pentasulfide is at least 0.5:1 and less than 8:1.
An asphalt composition which comprises the reaction product of an asphalt, an unsaturated polymer, a source of phosphorus and a source of sulfur, wherein the source of phosphorus and the source of sulfur form reactive crosslinks between components of the asphalt and the unsaturated polymer.
Dependencies are inferred from the claim text.