Coating with ion

August 11, 2005

Patent No. U.S. 6,815,466 B2
Rohm and Haas Company has received a patent for an aqueous dispersion. It is comprised of a blend of an anion exchange resin having a particle size of 0.5 to 50 microns, the anion exchange resin is prepared by a process selected from the group consisting of suspension polymerization, phenol formulated condensation and condensation polymerization of at least one polyamine and epichlorohydrin; with a water-insoluble addition copolymer. The copolymer is prepared by emulsion polymerization and occurs in the presence of a nonionic protective colloid. The copolymer has a particle size of less than one micron. The aqueous dispersion has a Brookfield viscosity, at 60 rpm using spindle three, of less than 2000 cps and colloidally stable and sedimentation stable.

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