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US 4,393,155 AGranted
Enhanced viscosity maintenance and demulsibility in asphalt emulsions
AssigneeAshland Oil, Inc.
InventorWilliam R. Garrett, Jr.
Life of this patent
Estimating the term…
Abstract
Improved viscosity maintenance properties and high demulsibility values are provided by asphalt-in-water emulsions; e.g., RS-2 comprising in combination asphalt, emulsifiers and polyacrylamides having molecular weights above about 100,000.
Claims10
Asphalt emulsions having demulsibility values of at least about 60%, and viscosity maintenance values of at least about 20 to about 400 Saybolt Furol Seconds over about 240 hours at 65.degree..+-.10.degree. C. comprising in combination;
- water, asphalt of penetration in the range of from about 75 to about 300 mm/10, emulsifying agents compatible with said asphalt, and from about 0.05 to about 1.0 percent by weight based on the total weight of said emulsion of an acrylic polymer having molecular weight of above about 1,000,000.
Dependencies are inferred from the claim text.