Patent ID: 7087665
Filing Date: 2006-08-08
Classification: C08L,C09D,E01C

Abstract:
1. A method for preparing an aqueous emulsion of pre-treated rubber modified asphalt cement, said method comprising the steps of: A. preparing a rubber modified asphalt cement by combining 45 to 90% by weight asphalt with about 5% to about 55 % by weight solid rubber particles under conditions that cause at least a substantial portion of the solid rubber to become liquified so that the resultant rubber modified asphalt contains no more than about 2% by weight residual solid rubber; B. combining the rubber modified asphalt cement form Step A with dodecyl benzenesulfonic acid to form a pretreated rubber modified asphalt cement; and, C. mixing the pretreated rubber modified asphalt cement with water, an acid and a polyfunctional amine compound that has an amine functionality of at least 3, to form an aqueous emulsion.