Patent ID: 8461245
Filing Date: 2013-06-11
Classification: C04B,C08L

Abstract:
1. A method for treating clay-bearing aggregates used in construction materials, comprising: introducing to clay-bearing sand aggregates, in an amount of 5% to 60% based on dry weight of clay, at least one copolymer obtained from monomer components (A), (B), and optionally (C), as follows: (A) in an amount of 0.10-0.95 mole, a first monomer selected from quarternized vinylpyridine or other cationic monomer represented by the following structures wherein R R R Z Y X represents a halide, pseudohalide, or sulfate; (B) in an amount of 0.05-0.90 mole, a second monomer represented by the structural formula wherein R Z Y “m” represents an integer of 10 to 200; and (C) in an amount of 0-0.20 mole, a third monomer selected from the group consisting of acrylate, methacrylate, acrylamide, methacrylamide, alkyl or dialkyl acrylamide, and methacrylamide monomers.