Patent ID: 7875213
Filing Date: 2011-01-25
Classification: C01P,C09C

Abstract:
1. A mineral slurry comprising: mineral particles in an amount equal to or greater than about 60 percent by total weight of the slurry, wherein 85 percent of the mineral particles have an average particle size equal to or less than 2 micrometers; a polyelectrolyte dispersant having a polydispersity of at least 1.0 to less than 1.5 comprises a first acrylate polymer and a second acrylate polymer derived from the first acrylate polymer, wherein the first acrylate polymer is formed by reversible addition-fragmentation chain transfer polymerization and includes a trithiocarbonate group in the center of the first acrylate polymer and the second acrylate polymer comprises endgroups comprising thio-containing residues derived from the trithiocarbonate group and has a weight average molecular weight (M the remainder water.