Asphalt emulsions and method of making same

Claim 1

AN ASPHALT EMULSION DISPLAYING GOOD ADHESION TO BOTH LIMESTONE AND SILICEOUS AGGREGATES CONSISTING ESSENTIALLY OF FROM 30 TO 50 PARTS BY WEIGHT OF AN ACIDIC AQUEOUS PHASE COMPRISING AN ACID HAVING AN IONIZATION CONSTANT GREATER THAN ABOUT 1.7X10-5 IN AN AMOUNT TO ACIDIFY THE PHASE AND FROM 50 TO 70 PARTS BY WEIGHT OF AN ASPHALT PHASE, AT LEAST ONE OF THE PHASES HAVING DISPERSED THEREIN AN AMIDOAMINE SOAP OF THE FORMULA R1-CO-N(-R2)-(R3-NH)X-R3''-NH(+)(-R4)-R4'' (-)OOC-R5 IN WHICH R1 AND R5 ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, ARYL, ALKYLARYL, ARYLALKYL, QUINOLYL AND THIENYLGROUPS HAVING FROM 6 TO 20 CARBON ATOMS; R2, R4 AND R4 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND ALKYL,CYCLOALKYL, ARYL, ALKYLARYL, ARYLALKYL, AND HETEROCYCLIC GROUPS HAVINGFROM 1 TO 19 CARBON ATOMS, THE HETEROCYCLIC GROUPS BEING FORMED BY THE NITROGEN ATOM WITH R4 AND R4''; R3 AND R3'' ARE SELECTED FROM THE GROUP CONSISTING OF BIVALEN ALKYLENE, ARYLENE, ARYLALKYLENE, ALKYLARYLENE AND DIAZYLENE RADICALS HAVING FROM 2 TO 18 CARBON ATOMS AND X IS AN INTEGER FROM ZERO TO 4.