Roofing asphalt composition
AssigneeBitumar Inc.
InventorsHua Qin Liu, Vu Q. Nguyen, Rene Dufresne
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Abstract
A roofing asphalt composition comprising an oxidized blend of a paving grade asphalt and recycled rubber is described herein.
Claims22
A roofing asphalt composition comprising a catalytically oxidized blend of a paving grade asphalt, recycled rubber and from 0.01% to 20% by weight of fluxing oil, based on the total weight of the roofing asphalt composition, wherein the paving grade asphalt is any asphalt as defined in ASTM D-1079 or mixture thereof, that satisfies the requirements of ASTM D-946, ASTM D-3381 or ASTM D-6373, and wherein the roofing asphalt composition has a softening point as defined in ASTM D-36 that is higher than 80° C. and a PEN at 25° C. as defined in ASTM D-5 that is between 5 and 40 dmm.
A method of preparing roofing asphalt composition comprising catalytically oxidizing a blend of a paving grade asphalt, recycled rubber and from 0.01% to 20% by weight of a fluxing oil, based on the total weight of the roofing asphalt composition, wherein the paving grade asphalt is any asphalt as defined in ASTM D-1079 or mixture thereof, that satisfies the requirements of ASTM D-946, ASTM D-3381 or ASTM D-6373, and wherein the roofing asphalt composition has a softening point as defined in ASTM D-36 that is higher than 80° C. and a PEN at 25° C. as defined in ASTM D-5 that is between 5 and 40 dmm.
Dependencies are inferred from the claim text.