Crosslinking with metal oxides other than zinc oxide
First Claim
Patent Images
1. A method for preparing asphalt and polymer compositions comprising:
- (a) heating an asphalt;
(b) adding a polymer to the asphalt;
(c) adding a crosslinker to the polymer;
(d) adding an activator to the polymer, where the activator is selected from the group consisting of oxides of metals from groups 2, 8, 9, 10, 11, and 12 of the Periodic Table (new IUPAC notation) in the absence of zinc, and mixtures thereof, where the activator is present in an amount sufficient to improve crosslinking; and
(e) adding an accelerator in an amount sufficient to improve crosslinking.
1 Assignment
0 Petitions
Accused Products
Abstract
It has been discovered that divalent metal oxides other than zinc oxide (ZnO) perform equivalently as activators in preparing asphalt polymer compositions. Typically, the crosslinker in these compositions is sulfur. Divalent metal oxides such as cupric oxide (CuO), magnesium oxide (MgO), and calcium oxide (CaO) provide alternative activators to give versatility to designing asphalt polymer compositions. In addition, some of these alternative divalent metal oxides are less expensive than the traditionally used ZnO.
14 Citations
24 Claims
-
1. A method for preparing asphalt and polymer compositions comprising:
-
(a) heating an asphalt;
(b) adding a polymer to the asphalt;
(c) adding a crosslinker to the polymer;
(d) adding an activator to the polymer, where the activator is selected from the group consisting of oxides of metals from groups 2, 8, 9, 10, 11, and 12 of the Periodic Table (new IUPAC notation) in the absence of zinc, and mixtures thereof, where the activator is present in an amount sufficient to improve crosslinking; and
(e) adding an accelerator in an amount sufficient to improve crosslinking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16)
-
-
10. A method for preparing asphalt and polymer compositions comprising:
-
(a) heating an asphalt;
(b) adding a polymer to the asphalt;
(c) adding a crosslinker to the polymer;
(d) adding an activator to the polymer, where the activator is selected from the group consisting of oxides of divalent metals from groups 2, 8, 9, 10 and 11 of the Periodic Table (new IUPAC notation) and mixtures thereof, where the activator is present in an amount ranging from about 0.005 to about 2.0 wt. percent based on the asphalt; and
(e) adding an accelerator in an amount sufficient to improve crosslinking. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
17. An asphalt and polymer composition prepared by the process comprising:
-
(a) heating an asphalt;
(b) adding a polymer to the asphalt;
(c) adding a crosslinker to the polymer;
(d) adding an activator to the polymer, where the activator is selected from the group consisting of oxides of metals from groups 2, 8, 9, 10, 11, and 12 of the Periodic Table (new IUPAC notation) in the absence of zinc, and mixtures thereof, where the activator is present in an amount sufficient to improve crosslinking, and (e) adding an accelerator in an amount sufficient to improve crosslinking. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification