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US 12,637,391 B2Granted
Rubber-containing asphalt compositions and related methods
AssigneeBmic LLC
InventorsAnn Hamer, Steven Sparks, Lisa Brzezinski, Paul Thornton
Life of this patent
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Abstract
Some embodiments relate to a method for producing a rubber-containing asphalt composition. The method for producing the rubber-containing asphalt composition comprises obtaining a rubber component; obtaining an unoxidized asphalt; mixing the rubber component and the unoxidized asphalt to obtain an unoxidized asphalt composition; oxidizing the unoxidized asphalt composition to obtain an oxidized asphalt composition; and forming a roofing shingle from the oxidized asphalt composition.
Claims14
A method comprising:
- obtaining a cryogenically-treated rubber component,
- wherein the cryogenically-treated rubber component comprises:
- a ground tire rubber;
- and
- a devulcanized rubber,
- wherein a weight ratio of the ground tire rubber to the devulcanized rubber is 1:5 to 5:1;
- obtaining an unoxidized asphalt;
- heating at least the unoxidized asphalt to a temperature of 300° F. to 425° F.;
- mixing at least the cryogenically-treated rubber component with the unoxidized asphalt to obtain an unoxidized asphalt composition,
- wherein the unoxidized asphalt composition comprises:
- 1% to 20% by weight of the cryogenically-treated rubber component based on a total weight of the unoxidized asphalt composition;
- and
- 80% to 99% by weight of the unoxidized asphalt based on the total weight of the unoxidized asphalt composition;
- after the step of mixing, oxidizing at least the unoxidized asphalt composition to obtain an oxidized asphalt composition,
- wherein the oxidized asphalt composition has a viscosity of 100 cP to 500 cP as measured according to ASTM D4402 using a RV3 viscometer spindle at 50 rpm and 400° F.;
- adding at least one filler to the oxidized asphalt composition to form an asphalt filled coating;
- and
- applying the asphalt filled coating to a fiberglass mat to form a roofing shingle.
15 more elements
A method comprising:
- obtaining a cryogenically-treated rubber component,
- wherein the cryogenically-treated rubber component comprises:
- a ground tire rubber;
- and
- a devulcanized rubber,
- wherein a weight ratio of the ground tire rubber to the devulcanized rubber is 1:5 to 5:1;
- obtaining an unoxidized asphalt;
- heating at least the unoxidized asphalt to a temperature of 300° F. to 425° F.;
- mixing at least the cryogenically-treated rubber component with the unoxidized asphalt to obtain an unoxidized asphalt composition,
- wherein the unoxidized asphalt composition comprises:
- 1% to 20% by weight of the cryogenically-treated rubber component based on a total weight of the unoxidized asphalt composition;
- and
- 80% to 99% by weight of the unoxidized asphalt based on the total weight of the unoxidized asphalt composition;
- after the step of mixing, oxidizing at least the unoxidized asphalt composition to obtain an oxidized asphalt composition,
- wherein the oxidized asphalt composition has a softening point of 180° F. to 235° F. as measured according to ASTM D36;
- adding at least one filler to the oxidized asphalt composition to form an asphalt filled coating;
- and
- applying the asphalt filled coating to a fiberglass mat to form a roofing shingle.
15 more elements
Dependencies are inferred from the claim text.