| abstract |
PURPOSE:To form particles in which a uniform mixture composed of two kinds of polymers is included by mixing respectively one kind of magnetic material particles, monomer such as alkyl acrylate and partially oxidized nitrocellulose contg. a nitrocellulose group, etc. and dispersing the mixture together with a suspended stabilizer into an aq. medium. CONSTITUTION:Respectively at least one kind of Fe3O4, etc. as the magnetic material particles, the monomer of methyl acrylate as the alkyl acrylate and the partially oxidized nitrocellulose contg. the nitrocellulose group, etc. are mixed. The mixture composed thereof is dispersed into the aq. medium by a high-speed stirrer, etc. in the presence of the suspension stabilizer such as hydroxyethyl cellulose so that the monomer is addition-polymerized by the radical decomposition in the presence of heat or reducing material. The polymer particles in which the uniform mixture of the magnetic material particles and at least two kinds of the polymers is included are thus produced. |