Patent ID: 8227163

Claim:
A carrier comprising: a magnetic core; and a polymeric coating over at least a portion of a surface of the core, the polymeric coating comprising a cation binding group comprising at least one cyclic structure selected from the croup consisting of crown ethers, cryptands, cyclens, porphin, meso-tetraphenyloorphyrin, tetratolylporphyrin, tetrabenzoporphyrin, tetraphenylporphyrin, orthophenyltetraazoporphyrin, and combinations thereof, wherein the polymeric coating comprises a polymer selected from the group consisting of acrylates and methacrylates, the polymeric coating has a carbon to oxygen ratio of from about 3:1 to about 8:1, and wherein the coated carrier has a resistivity of from about 10 8 ohm-cm to about 10 13 ohm-cm at 500 volts.