Patent ID: 9187644
Filing Date: 2015-11-17
Classification: B01F,B29C,C08J,C08K,C08L,E01C

Abstract:
1. A method for preparing an asphalt formulation in a continuous processor which comprises continuously feeding a base asphalt, a polymer, and optionally one or more additional ingredients, into a continuous processor having at least two co-rotating shafts, at least one feed zone, a driving zone, a mixing zone, and a discharge zone, wherein the driving zone provides thrust to convey the asphalt in a drive direction from the feed zone toward the discharge zone of the continuous processor, wherein the mixing zone provides little or no thrust to the asphalt in the drive direction, wherein the mixing zone provides shear forces to mix the polymer and any additional ingredients throughout the base asphalt to produce the asphalt formulation which has an essentially homogeneous composition, wherein the asphalt is maintained in the continuous processor for a maximum residence time of about 20 minutes at a temperature which is above the softening point of the asphalt and which is above 200° F., and wherein the asphalt is discharged from the discharge zone of the continuous processor as the asphalt formulation.