Method for coating mineral granules to improve bonding to hydrocarbon-based substrate and coloring of same
Provided are compositions comprising stamp sand granules embedded in asphalt, where the stamp sand granules comprise a silane coating. Additionally provided are methods of making a silane-coated stamp sand, the methods comprising combining stamp sand granules and a silane solution to form a mixture and drying the mixture. Additionally provided are methods of covering a surface, the methods comprising combining silane-coated particles and asphalt to provide a mixture and distributing the mixture on the surface.
1. A composition comprising:
stamp sand granules embedded in asphalt, wherein the stamp sand granules comprise a silane coating, wherein the silane coating comprises methyltrimethoxysilane.
2. The composition of claim 1 , wherein the stamp sand comprises a silica, a kaolinite, a talc, a limestone, a slate, a basalt, a nephelite, a bentonite, or a combination thereof.
3. The composition of claim 1 , wherein the stamp sand granules comprise about 9% 8-12 mesh granules, about 38% 12-16 mesh granules, about 30% 16-20 mesh granules, and about 15% 20-30 mesh granules.
4. The composition of claim 1 , wherein the stamp sand granules further comprise a pigment.
5. The composition of claim 4 , wherein the pigment comprises titanium oxide, kaolin, bentonite, red iron oxide, chrome oxide, chrome green, carbon black, metal ferrite, and mixtures thereof.
6. The composition of claim 1 , wherein the asphalt comprises a modified asphalt.
7. The composition of claim 1 , wherein the composition comprises an average adhesion, and the average adhesion is at least about 60% after the composition has soaked in water for about 3 days to about 10 days.
8. The composition of claim 1 , further comprising a paper, a fiberglass, or a combination thereof.
9. A method of making a silane-coated stamp sand, the method comprising:
combining stamp sand granules and a silane solution to form a mixture; and
drying the mixture,
wherein the silane solution comprises methyltrimethoxysilane.
10. The method of claim 9 , wherein the silane solution comprises at least about 0.10 wt. % of the mixture.
11. The method of claim 9 , wherein the stamp sand granules comprise a pigment.
12. The method of claim 11 , wherein the pigment comprises titanium oxide, kaolin, bentonite, red iron oxide, chrome oxide, chrome green, carbon black, metal ferrite, and mixtures thereof.
13. The method of claim 9 , wherein the stamp sand granules comprise a ceramic coating.
14. The method of claim 13 , wherein the ceramic coating comprises sodium silicate, a metal oxide, and bentonite clay.
15. The method of claim 13 , wherein the metal oxide comprises titanium oxide, red iron oxide, chrome oxide, metal ferrite, and mixtures thereof.
16. The method of claim 9 , wherein drying comprises heating the mixture from about 50° C. to about 110° C.
17. The method of claim 9 , wherein the stamp sand granules are not dry.
18. A method of covering a surface, the method comprising:
combining silane-coated particles and asphalt to provide a mixture; and
distributing the mixture on the surface, wherein the silane-coated particles comprise methyltrimethoxysilane.