Polybetaines as asphalt emulsifiers
AssigneeAkzo Nobel N.V.
InventorsJulia Mary Wates, Alan James
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Abstract
A method of emulsifying asphalt using a polyamine polybetaine, preferably a dibetaine, as an emulsifier or co-emulsifier and an emulsion of asphalt, water and a polybetaine, preferably a diamine dibetaine. The advantages of using a polyamine polybetaine as an emulsifier or co-emulsifier include its ability to provide superior cationic and anionic emulsions, and slow-setting emulsions at low use levels, and the excellent adhesion of the cured asphalt film.
Claims20
A method of emulsifying asphalt in water comprising adding to a mixture of asphalt and water an emulsifying effective amount of at least one polyamine polybetaine.
An asphalt emulsion which comprises water and at least one polyamine polybetaine in an amount effective to emulsify the asphalt in the water.
Dependencies are inferred from the claim text.