Polyolefin asphalt modifiers, methods of modifying asphalt, asphalt compositions and methods of making
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.
1. An asphalt composition comprising asphalt, ground tire rubber, polypropylene homopolymer, glycidyl functional terpolymer, and wax.
2. The asphalt of claim 1 , wherein the wax comprises a polyethylene wax.
3. The asphalt of claim 1 , wherein the glycidyl functional polymer comprises glycidyl acrylate functionality.
4. The asphalt of claim 1 , wherein the glycidyl functional polymer comprises glycidyl methacrylate functionality.
5. The asphalt of claim 1 , comprising in the range of 0.025-2.0% wax, in the range of about 0.05-10% polypropylene homopolymer, 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.
6. The asphalt of claim 1 , comprising in the range of about 0.05-0.10% wax, in the range of about 0.1-4% polypropylene homopolymer, 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.
7. A modified asphalt that is a product of:
preparing an additive comprising wax, polypropylene homopolymer, 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.
8. The modified asphalt of claim 7 , wherein the wax comprises a polyethylene wax.
9. The modified asphalt of claim 7 , wherein the glycidyl functional polymer comprises glycidyl acrylate functionality.
10. The modified asphalt of claim 7 , wherein the glycidyl functional polymer comprises glycidyl methacrylate functionality.
11. The modified asphalt of claim 7 , wherein the additive comprises in the range of about 1-30% wax, in the range of about 20-60% polypropylene homopolymer, and in the range of about 30-70% glycidyl function polymer, based on the weights of those three components.
12. The modified asphalt of claim 7 , wherein the additive comprises in the range of about 5-15% wax, in the range of about 30-45% polypropylene homopolymer, and in the range of about 40-65% glycidyl function polymer, based on the weights of those three components.
13. The modified asphalt of claim 7 , comprising in the range of 0.025-2.0% wax, in the range of about 0.05-10% polypropylene homopolymer, 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.
14. The modified asphalt of claim 7 , comprising in the range of about 0.05-0.10% wax, in the range of about 0.1-4% polypropylene homopolymer, 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.
15. The modified asphalt of claim 7 , 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, 65:35or 70:30.
16. The modified asphalt of claim 7 , 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.
17. A method of forming a modified asphalt, the method comprising:
preparing an additive comprising wax, polypropylene homopolymer, 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.
18. The method of claim 17 , wherein the wax comprises a polyethylene wax.
19. The method of claim 17 , wherein the glycidyl functional polymer comprises glycidyl acrylate functionality.
20. The method of claim 17 , wherein the glycidyl functional polymer comprises glycidyl methacrylate functionality.
21. The method of claim 17 , wherein the additive comprises in the range of about 1-30% wax, in the range of about 20-60% polypropylene homopolymer, and in the range of about 30-70% glycidyl function polymer, based on the weights of those three components.
22. The method of claim 17 , wherein the additive comprises in the range of about 5-15% wax, in the range of about 30-45% polypropylene homopolymer, and in the range of about 40-65% glycidyl function polymer, based on the weights of those three components.
23. The method of claim 17 , comprising in the range of 0.025-2.0% wax, in the range of about 0.05-10% polypropylene homopolymer, 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.
24. The method of claim 17 , comprising in the range of about 0.05-0.10% wax, in the range of about 0.1-4% polypropylene homopolymer, 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.
25. 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, 65:35or 70:30.
26. The method of claim 17 , 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.