US 11,898,040 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 Apr. 7, 2022, as Appl. No. 17/715,603.
Claims priority of provisional application 63/171,750, filed on Apr. 7, 2021.
Prior Publication US 2022/0332949 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
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)] 12 Claims
OG exemplary drawing
 
1. A filled coating configured to be applied to a roofing substrate to obtain a shingle, the filled coating comprising:
(a) asphalt;
wherein the asphalt has a softening point of 100° F. to 200° F. as measured according to ASTM D3461;
(b) 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,
wherein the at least one hardening agent is mixed with the asphalt in a weight ratio of 1:100 to 1:2 to form a hardened asphalt, 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 great than a viscosity of the asphalt when tested at 400° F.;
(c) at least one polymer,
wherein the at least one polymer is mixed with the hardened asphalt in a weight ratio of 1:100 to 1:5 to form a polymer modified asphalt (PMA), and
wherein the PMA has a softening point that is greater than the softening point of the asphalt; and
(d) 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, and 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 PMVA based on the total weight of the filled coating, and
wherein the filled coating has a thickness of 20 mil to 200 mil.