Patent ID: 6156828
Filing Date: 2000-12-05
Classification: C08L,E01C

Abstract:
A method of preparing an emulsion for adding rubber to asphalt material comprising the steps of:(a) mixing 3 to 7 parts by weight of an aliphatic solvent with 3 to 4 parts by weight of water at ambient temperature to form a solvent/water emulsion;(b) admixing 1 to 1.5 parts by weight of a nonionic ethoxylated nonylphenol as an emulsifying agent, 1/10 to 1/2 part by weight each of atactic polypropylene and a clay mineral, and 1/10 to 1/5 part by weight of an aliphatic amine with the solvent/water emulsion at ambient temperature to form an aqueous gel emulsion; and(c) admixing 3 to 7 parts by weight of crumb rubber at ambient temperature with the aqueous gel emulsion.