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US 9,279,042 B2Granted
Method of the production of a roofing asphalt composition using catalytic oxidation
AssigneeBitumar Inc.
InventorsHua Qin Liu, Vu Q. Nguyen, Rene Dufresne
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Abstract
A catalytic process for preparing a roofing asphalt composition comprising an oxidized blend of a paving grade asphalt and recycled rubber is described herein.
Claims22
A catalytic process for preparing a roofing asphalt composition, the process comprising:
- (a) catalytically oxidizing a paving grade asphalt and recycled rubber particles at a temperature ranging from about 220° C. to about 300° C. and obtaining a catalytically oxidized mixture;
- (b) homogenizing the catalytically oxidized mixture;
- and
- (c) recovering the asphalt composition.
1 more element
Dependencies are inferred from the claim text.