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US 12,703,796 B2Granted
Sterol in asphalt roofing materials
AssigneesA.L.M. Holding Company, Ergon Asphalt & Emulsions, Inc.
InventorsGerald H. Reinke, Gaylon L. Baumgardner, Andrew Hanz
Life of this patent
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Abstract
Disclosed are compositions and methods of making and using asphalt roofing materials. The asphalt roofing materials include sterols. The sterols improve various rheological and aging properties of the asphalt roofing materials.
Claims15
A method for retarding the rate of aging of an asphalt-based roofing material comprising
- air blowing a virgin asphalt binder composition to provide an oxidized, virgin asphalt binder composition,
- adding sterol to the oxidized, virgin asphalt binder composition, and,
- after adding the sterol, using the oxidized, virgin asphalt binder composition to make the asphalt-based roofing material.
A method of making roofing materials comprising;
- treating a virgin asphalt binder to provide an oxidized virgin asphalt binder;
- adding sterol to the oxidized virgin asphalt binder composition to form a coating asphalt composition;
- and
- coating a roofing material substrate with the coating asphalt binder composition.
1 more element
Dependencies are inferred from the claim text.