US 11,795,328 B2
Hardening asphalt for roofing applications
Denis Tibah, Waxahachie, TX (US); Ramil Marcelo L. Mercado, Waxahachie, TX (US); and Kevin Carr, Dallas, TX (US)
Assigned to BMIC LLC, Dallas, TX (US)
Filed by BMIC LLC, Dallas, TX (US)
Filed on Oct. 25, 2022, as Appl. No. 17/973,277.
Application 17/973,277 is a continuation of application No. 17/715,603, filed on Apr. 7, 2022.
Claims priority of provisional application 63/171,750, filed on Apr. 7, 2021.
Prior Publication US 2023/0059632 A1, Feb. 23, 2023
Int. Cl. C08L 95/00 (2006.01)
CPC C08L 95/00 (2013.01) [C08L 2555/60 (2013.01); C08L 2555/84 (2013.01); C08L 2555/86 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining asphalt;
wherein the asphalt has a softening point of 100° F. to 200° F. as measured according to ASTM D3461;
obtaining at least one hardening agent;
wherein the at least one hardening agent has a softening point of 150° F. to 300° F. as measured according to ASTM D3461;
mixing the at least one hardening agent with the asphalt, so as to form a hardened asphalt;
wherein the at least one hardening agent is mixed with the asphalt in a weight ratio of 1:100 to 1:2, and
wherein the hardened asphalt has (i) a softening point that is greater than the softening point of the asphalt and (ii) a viscosity that is greater than a viscosity of the asphalt when tested at 400° F.;
obtaining at least one polymer;
mixing the at least one polymer with the hardened asphalt, so as to form a polymer modified asphalt (PMA);
wherein the at least one polymer is mixed with the hardened asphalt in a weight ratio of 1:100 to 1:5, and
wherein the PMA has a softening point that is greater than the softening point of the asphalt;
obtaining at least one filler;
wherein the at least one filler comprises at least one of limestone, glass, calcium carbonate, barium sulfate, calcium sulfate, talc, perlite, silica, quartz, aluminum trihydrate, magnesium hydroxide, ammonium polyphosphate, colemanite, titanium dioxide, fly ash, graphene nanoparticles, carbon black, basalt, roofing granules, graphite, clay, or any combination thereof;
mixing the at least one filler with the PMA, so as to form a filled coating,
wherein the filled coating comprises (i) 10% to 70% by weight of the at least one filler based on a total weight of the filled coating, and (ii) 30% to 90% by weight of the PMA based on the total weight of the filled coating, and
wherein the filled coating has a thickness of 20 mil to 200 mil;
obtaining a roofing substrate; and
applying the filled coating to the roofing substrate, so as to form a roofing shingle.