POLYOLEFIN ASPHALT MODIFIERS, METHODS OF MODIFYING ASPHALT, ASPHALT COMPOSITIONS AND METHODS OF MAKING

• US 20180312694A1
• Filed: 04/10/2017
• Published: 11/01/2018
• Est. Priority Date: 03/08/2009
• Status: Active Grant

• Current Assignee: Lehigh Technologies, Inc. (Compagnie Generale DES Etablissements Michelin SCA)
• Original Assignee: Lehigh Technologies, Inc. (Compagnie Generale DES Etablissements Michelin SCA)
• Inventors: NAIDOO, PREMNATHAN, Keating, Vernon Patrick
• Granted Patent: US 10,294,370 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 110/00 Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08L 17/00 Compositions of reclaimed rubber
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 23/00 Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 23/04 Homopolymers or copolymers of ethene
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 23/18 Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 55/00 Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
• CPC Class Codes: C08L 7/02 Latex
• CPC Class Codes: C08L 9/06 Copolymers with styrene
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof
• CPC Class Codes: C08L 91/06 Waxes
• CPC Class Codes: C08L 95/00 Compositions of bituminous materials, e.g. asphalt, tar, pitch
• CPC Class Codes: C09D 195/00 Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
• CPC Class Codes: Y02A 30/30 : in transportation, e.g. on roads, waterways or railways

Abstract

An asphalt additive comprising a primary rheology modifying component and a secondary rheology modifying component, and asphalt compositions and products having such additive incorporated therein. The primary rheology modifying component is generally a polymer, and the secondary rheology modifying component may comprise a petroleum micro-wax.

Claims

1. A method of forming a modified asphalt, the method comprising:

preparing an additive comprising wax, polypropylene, and glycidyl functional polymer;

preparing a first concentrate comprising the additive and a first asphalt portion;

preparing a second concentrate of ground tire rubber and second asphalt portion, wherein the first asphalt portion and the second asphalt portion may be the same or different types of asphalts; and

,

combining the concentrates to form a modified asphalt.

2. The method of claim 1, wherein the wax comprises a polyethylene wax.

3. The method of claim 1, wherein the glycidyl functional polymer comprises glycidyl acrylate functionality.

4. The method of claim 1, wherein the glycidyl functional polymer comprises glycidyl methacrylate functionality.

5. The method of claim 1, wherein the additive comprises in the range of about 1-30% wax, in the range of about 20-60% polypropylene, and in the range of about 30-70% glycidyl function polymer, based on the weights of those three components.

The method of claim 1, wherein the additive comprises in the range of about 5-15% wax, in the range of about 30-45% polypropylene, and in the range of about 40-65% glycidyl function polymer, based on the weights of those three components.

6. The method of claim 1, comprising in the range of 0.025-2.0% wax, in the range of about 0.05-10% polypropylene, in the range of about 0.1-5% glycidyl function polymer, in the range of about 2-30% ground tire rubber, and in the range of about 65-98% asphalt, based on the weights of those five components.

7. The method of claim 1, comprising in the range of about 0.05-0.10% wax, in the range of about 0.1-4% polypropylene, in the range of about 0.2-2% glycidyl function polymer, in the range of about 5-15% ground tire rubber and in the range of about 85-95%, based on the weights of those five components.

8. The method of claim 1, wherein the weight ratios of the first asphalt portion and the second asphalt portion are in a range to/from or between any two of the following ratios of 30:

70, 35;

65, 40;

60, 45;

55, 50;

50, 55;

45, 60;

40, 65;

35 or 70;

30.

9. The method of claim 1, wherein the weight ratios of the first concentrate and the second concentrate are in the range of to/from or between any two of the following 30:

70, 35;

65, 40;

60, 45;

55, 50;

50, 55;

45, 60;

40, 65;

35 or 70;

30.

10. A modified asphalt that is a product of:

preparing an additive comprising wax, polypropylene, and glycidyl functional polymer;

preparing a first concentrate comprising the additive and a first asphalt portion;

preparing a second concentrate of ground tire rubber and second asphalt portion, wherein the first asphalt portion and the second asphalt portion may be the same or different types of asphalts; and

,

combining the concentrates to form the modified asphalt.

11. The modified asphalt of claim 10, wherein the wax comprises a polyethylene wax.

12. The modified asphalt of claim 10, wherein the glycidyl functional polymer comprises glycidyl acrylate functionality.

13. The modified asphalt of claim 10, wherein the glycidyl functional polymer comprises glycidyl methacrylate functionality.

14. The modified asphalt of claim 10, wherein the additive comprises in the range of about 1-30% wax, in the range of about 20-60% polypropylene, and in the range of about 30-70% glycidyl function polymer, based on the weights of those three components.

15. The modified asphalt of claim 10, wherein the additive comprises in the range of about 5-15% wax, in the range of about 30-45% polypropylene, and in the range of about 40-65% glycidyl function polymer, based on the weights of those three components.

16. The modified asphalt of claim 10, comprising in the range of 0.025-2.0% wax, in the range of about 0.05-10% polypropylene, in the range of about 0.1-5% glycidyl function polymer, in the range of about 2-30% ground tire rubber, and in the range of about 65-98% asphalt, based on the weights of those five components.

17. The modified asphalt of claim 10, comprising in the range of about 0.05-0.10% wax, in the range of about 0.1-4% polypropylene, in the range of about 0.2-2% glycidyl function polymer, in the range of about 5-15% ground tire rubber and in the range of about 85-95%, based on the weights of those five components.

18. The modified asphalt of claim 10, wherein the weight ratios of the first asphalt portion and the second asphalt portion are in a range to/from or between any two of the following ratios of 30:

70, 35;

65, 40;

60, 45;

55, 50;

50, 55;

45, 60;

40, 65;

35 or 70;

30.

19. The modified asphalt of claim 10, wherein the weight ratios of the first concentrate and the second concentrate are in the range of to/from or between any two of the following 30:

70, 35;

65, 40;

60, 45;

55, 50;

50, 55;

45, 60;

40, 65;

35 or 70;

30.

20. An asphalt composition comprising asphalt, ground tire rubber, polypropylene, glycidyl functional terpolymer, and wax.

21. The asphalt of claim 20, wherein the wax comprises a polyethylene wax.

22. The asphalt of claim 20, wherein the glycidyl functional polymer comprises glycidyl acrylate functionality.

23. The asphalt of claim 20, wherein the glycidyl functional polymer comprises glycidyl methacrylate functionality.

24. The asphalt of claim 20, comprising in the range of 0.025-2.0% wax, in the range of about 0.05-10% polypropylene, in the range of about 0.1-5% glycidyl function polymer, in the range of about 2-30% ground tire rubber, and in the range of about 65-98% asphalt, based on the weights of those five components.

25. The asphalt of claim 20, comprising in the range of about 0.05-0.10% wax, in the range of about 0.1-4% polypropylene, in the range of about 0.2-2% glycidyl function polymer, in the range of about 5-15% ground tire rubber and in the range of about 85-95%, based on the weights of those five components.