Plastomer-modified asphalt binders meeting MSCR specifications, asphalt paving materials with such asphalt binders, and methods for fabricating such asphalt binders
View Patent ↗Plastomer-modified asphalt binders meeting MSCR specifications, asphalt paving materials with such asphalt binders, and methods for fabricating such asphalt binders are provided. The asphalt binder contains a base asphalt and a plastomer. If the plastomer has a drop point no greater than about 139° C., the asphalt binder further contains sulfur; sulfur-containing compounds, such as hydrocarbyl polysulfides and thiuram disulfides; phenolic resins; metal oxides; or a combination thereof. The asphalt binder is substantially free of elastomer.
1. An asphalt binder comprising:
a base asphalt; and
a plastomer comprising;
a maleated polypropylene having a drop point of from about 152° C. to about 155° C.,
a polypropylene homopolymer having a drop point of about 167° C., or
a combination thereof;
wherein the asphalt binder is substantially free of elastomer.
2. The asphalt binder of claim 1 , wherein the maleated polypropylene has a drop point of about 152° C. and a saponification number of from about 75 to about 95 mg KOH/gm.
3. The asphalt binder of claim 1 , wherein the maleated polypropylene has a drop point of about 155° C. and a saponification number of about 14 to about 22 mg KOH/gm.
4. The asphalt binder of claim 1 , wherein the polypropylene homopolymer has saponification number of about 0 mg KOH/gm.
5. The asphalt binder of claim 1 , further comprising an additive selected from the group consisting of sulfur, sulfur-containing compounds, phenolic resins, metal oxides, or a combination thereof.
6. The asphalt binder of claim 1 , wherein the plastomer is present in the asphalt binder in an amount no greater than about 10 wt. % based on a total weight of the asphalt binder.
7. The asphalt binder of claim 5 , wherein the additive is present in the asphalt binder in an amount no greater than about 1 wt. % based on a total weight of the asphalt binder.
8. The asphalt binder of claim 1 , wherein the base asphalt is utilized for paving applications, coating applications, sealant applications, roofing material applications, or adhesive applications.
9. An asphalt paving material comprising:
an asphalt binder comprising:
a base asphalt; and
a plastomer comprising;
a maleated polypropylene having a drop point of from about 152° C. to about 155° C.,
a polypropylene homopolymer having a drop point of about 167° C., or
a combination thereof;
wherein the asphalt binder is substantially free of elastomer; and an aggregate.
10. The asphalt paving material of claim 9 , wherein the maleated polypropylene has a drop point of about 152° C. and a saponification number of from about 75 to about 95 mg KOH/gm.
11. The asphalt paving material of claim 9 , wherein the maleated polypropylene has a drop point of about 155° C. and a saponification number of about 14 to about 22 mg KOH/gm.
12. The asphalt paving material of claim 9 , wherein the polypropylene homopolymer that has a drop point of about 167° C. and a saponification number of about 0.
13. The asphalt paving material of claim 9 , further comprising an additive selected from the group consisting of sulfur, sulfur-containing compounds, phenolic resins, metal oxides, or a combination thereof.
14. The asphalt paving material of claim 13 , wherein the additive is present in the asphalt binder in an amount no greater than about 1 wt. % based on a total weight of the asphalt binder.
15. The asphalt paving material of claim 9 , wherein the plastomer is present in the asphalt binder in an amount no greater than about 10 wt. % based on a total weight of the asphalt binder.
16. An asphalt binder comprising:
a base asphalt; and
a plastomer comprising;
a maleated polypropylene having a drop point of about 152° C.,
a maleated polypropylene having a drop point of about 155° C.,
a polypropylene homopolymer having a drop point of about 167° C., or combinations thereof;
wherein the asphalt binder is substantially free of elastomer.
17. The asphalt binder of claim 16 , wherein the maleated polypropylene has a saponification number of from about 75 to about 95 mg KOH/gm.
18. The asphalt binder of claim 16 , wherein the maleated polypropylene has a saponification number of from about 14 to about 22 mg KOH/gm.
19. The asphalt binder of claim 16 , wherein the polypropylene homopolymer has a saponification number of about 0 mg KOH/gm.