Patent ID: 7213446
Filing Date: 2007-05-08
Classification: C08L,Y10T

Abstract:
1. A method of selecting a bituminous emulsion with enhanced performance, comprising: (a) selecting at least one proposed emulsifier comprised of at least about 5% by mass of a cationic nitrogenous compound selected from the group consisting of compounds having a carbonyl carbon atom bonded to a nitrogen atom, compounds having a carbon atom double bonded to a nitrogen atom, and combinations thereof based on the total mass of said proposed emulsifier; (b) reacting said proposed emulsifier with a carboxylic acid to create at least one proposed carboxylate salt; (c) mixing bitumen and said proposed carboxylate salt to form at least one proposed bituminous emulsion; (d) applying said proposed bituminous emulsion to a surface; (e) measuring coalescence of said proposed bituminous emulsion; and (f) selecting a bituminous emulsion for paving a surface after said coalescence measuring step and choosing said bituminous emulsion based on said coalescence measurement of said proposed bituminous emulsion.