Patent ID: 7425596
Filing Date: 2008-09-16
Classification: C04B,C08F,C08L

Abstract:
1. A method of dispersing aqueous suspensions of solids, the method comprising: blending block copolymers with an aqueous suspension of solids, the suspension of solids including hydraulic binders which include materials selected from the group consisting of cement, lime, gypsum, anhydrite and mixtures thereof, wherein the block copolymers are prepared by reacting a poly(alkylene oxide) compound of the general formula (I) in which R m=2 to 4; n=1 to 250; and Z is selected from the group of formulas III, IV, and V where Y═O or NR R X=Cl or Br m′=1 to 4 n′=0 to 2, where R X=Cl or Br, in which R and R and R with an ethylenically unsaturated monomer compound of the general formula (II) in a free radical, anionic or cationic polymerization in which R R R R R R R