To provide a water dispersed material which is capable of polishing copper or the like at a high speed without making scratches on the surface of a polished work of copper or the like.
A water dispersed material that contains a polymer which is of crosslinked structure and has functional groups that form cations in its molecules or particles formed of copolymer and water is obtained. A polymer possessed of a functional group which forms cations can be produced by polymerizing methyl methacrylate or the like by the use of an azo-polymerization initiator possessed of the above functional group. Or, a polymer possessed of a functional group which forms cations can be produced by polymerizing methyl methacrylate or the like by the use of the above initiator in the presence of polystyrene. Furtheremore, a copolymer having a functional group which produces cations can be produced by it that a monomer such as 3-amino-2- hydroxypropyl methacrylate possessed of a specific functional group is copolymerized with methyl methacrylate.
HATTORI MASAYUKI
KAWAHASHI NOBUO
