Plastomer-modified asphalt binders meeting MSCR specifications, asphalt paving materials with such asphalt binders, and methods for fabricating such asphalt binders

Patent metadata

Field	Value
Publication number	US-9764984-B2
Application number	US-201514604028-A
Country	US
Kind code	B2
Filing date	Jan 23, 2015
Priority date	Feb 7, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

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.

First claim

What is claimed is:

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.

Assignees

• Honeywell Int Inc

Inventors

• Ruan Yonghong
• Hacker Scott M

Classifications

• C08L95/00

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• C04B2111/60

  Flooring materials · CPC title

• C04B2111/0075

  for road construction · CPC title

• C04B2111/00637

  as glue or binder for uniting building or structural materials · CPC title

• C04B2111/00586

  Roofing materials · CPC title