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US 2021/0002484 A1Published application
Modified asphalts with enhanced rheological properties and associated methods
AssigneeMarathon Petroleum Company LP
InventorsCristian Clopotel, Donald Siler, Brian Wilt
Life of this patent
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Abstract
A modified asphalt binder with improved elastic properties and methods of making such modified asphalt binder. The modified asphalt binders may include one or more of an asphalt binder, a solvent deasphalted (SDA) pitch, a polymeric material, and optionally, a ground tire rubber. The disclosed modified asphalt binders exhibit properties consistent with decreased susceptibility to rutting and thus may be used in asphalt concrete applications.
Claims24
A modified asphalt binder comprising:
- an asphalt binder;
- a solvent deasphalted (SDA) pitch;
- and
- a polymeric material.
1 more element
A modified asphalt binder comprising:
- an asphalt binder;
- a solvent deasphalted (SDA) pitch;
- a ground tire rubber;
- and
- a polymeric material selected from styrene-butadiene (SB) copolymers, styrene-butadiene-styrene (SBS) copolymers, or combinations thereof.
2 more elements
A method for producing an asphalt binder, the method comprising:
- i) combining a solvent deasphalted pitch, heated to a temperature of from about 150° C. to about 250° C.;
- and an asphalt binder, heated to a temperature of from about 150° C. to about 250° C., to form a first combination;
- ii) mixing the first combination to form a first mixture;
- iii) combining with the first mixture a polymeric material selected from styrene-butadiene (SB) copolymers, styrene-butadiene-styrene (SBS) copolymers, or combinations thereof, to form a second combination;
- and
- iv) mixing the second combination to form a SDA-polymer modified asphalt binder.
3 more elements
Dependencies are inferred from the claim text.