Cationic aqueous bituminous aggregate slurries for hot climates
AssigneeWestvaco Corporation
InventorPeter Schilling
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Abstract
Cationic aqueous bituminous emulsion-aggregate slurries are disclosed to be formed with cationic emulsions prepared at elevated temperatures by emulsifying bitumen, such as an asphalt, in water with a cation-active emulsifier which is the blend of the reaction of a polyamine or of a modified polyamine with certain polycarboxylic acids and glycol esters. The emulsifiers are obtained by reacting suitable polyalkylene amines with lignin and maleinized lignin or their blends with tall oil fatty acids and the reaction product of C.sub.8 -C.sub.15 alkylphenol with 30 to 100 moles of ethylene oxide.
Claims10
An improved paving slurry seal mixture of a cationic aqueous bituminous emulsion and mineral aggregate capable of being worked comprising a mineral aggregate of a grade passing through a No. 4 seive and at least 80% retained on 200 mesh, mixing water, and from about 10% to about 20%, by weight of the aggregate, of an oil-in-water emulsion of a pH of 1-7 and comprised of from about 30% to about 80% bitumen, by weight of the emulsion, from about 0.1% to about 10% of a cation active emulsifier, based on the weight of the emulsion, and water to make up 100% of the emulsion, wherein the improvement comprises, as the cation active emulsifier, a blend of (1) the product of the reaction of a C.sub.8 -C.sub.15 alkylphenol with from 15 to 100 moles ethylene oxide and (2) the condensate product of the reaction of a polyamine with a member of the group consisting of kraft lignin and maleinized kraft lignin.
Dependencies are inferred from the claim text.