System and method for pre-treatment of rubber-modified asphalt cement, and emulsions thereof
This invention encompasses asphalt cement emulsions, as well as methods for preparing a pre-treated rubber-modified asphalt cement emulsions and methods for coating industrial surfaces using asphalt cement emulsions.
1. An asphalt cement emulsion comprising:
i) droplets of rubber-modified asphalt cement, characterized in that:
a) the droplets have a diameter of less than 20 microns;
b) the rubber-modified asphalt cement is pre-treated with one or more emulsifiers comprising an amine compound; and
c) rubber in the rubber-modified asphalt cement has an average size of less than 1 micron;
ii) water; and
iii) clay,
wherein the asphalt cement emulsion undergoes a change in viscosity of less than 10% over a temperature range of 40-140° F.
2. The emulsion of claim 1 , wherein the rubber-modified asphalt cement has a solubility in trichloroethylene of at least 99% according to ASTM D2042.
3. The emulsion of claim 1 , wherein the rubber-modified asphalt cement has a rubber content in the range of 16-35 wt. %.
4. The emulsion of claim 1 , wherein the rubber-modified asphalt cement is formed at a temperature of 500° F.
5. The emulsion of claim 1 , wherein the rubber is devulcanized.
6. The emulsion of claim 1 , wherein the one or more emulsifiers comprises a diamine compound.
7. The emulsion of claim 1 , wherein the emulsion has a viscosity in the range of 35-170 KU.
8. The emulsion of claim 1 , wherein the emulsion is at least partially viscosity-stabilized.
9. The emulsion of claim 8 , wherein the emulsion does not require on-site heating.
10. A method for coating an industrial surface, comprising: contacting the industrial surface with the emulsion of claim 1 .
11. A cured coating, comprising: a cured residue of the emulsion of claim 1 on a surface.
12. An asphalt cement emulsion comprising:
i) rubber-modified asphalt cement pre-treated with one or more emulsifiers comprising an amine compound;
ii) water; and
iii) clay,
wherein the asphalt cement emulsion undergoes a change in viscosity of less than 10% over a temperature range of 40-140° F.
13. The emulsion of claim 1 , wherein the rubber-modified asphalt cement is pre-treated with at least a portion of the one or more emulsifiers.