초록 ▼

Metal oxide containing polymers and particularly styrene, acrylic or protein polymers containing fine, magnetic iron oxide particles are formed by combining a NO2-substituted polymer with an acid such as hydrochloric acid in the presence of metal, particularly iron particles. The iron is oxidized to

Metal oxide containing polymers and particularly styrene, acrylic or protein polymers containing fine, magnetic iron oxide particles are formed by combining a NO2-substituted polymer with an acid such as hydrochloric acid in the presence of metal, particularly iron particles. The iron is oxidized to fine, black Fe3O4 particles which deposit selectively on the polymer particles. Nitrated polymers are formed by reacting functionally substituted, nitrated organic compounds such as trinitrobenzene sulfonate or dinitrofluoro benzene with a functionally coreactive polymer such as an amine modified acrylic polymer or a protein. Other transition metals such as cobalt can also be incorporated into polymers using this method.

대표청구항 ▼

A method of producing magnetic polymeric particles comprising the steps of: combining a polymer containing organic nitro groups on the basis of from 5 percent nitration based on monomer groups up to four nitro groups per every monomer group with acid in the presence of a metal oxidizable by said nit

A method of producing magnetic polymeric particles comprising the steps of: combining a polymer containing organic nitro groups on the basis of from 5 percent nitration based on monomer groups up to four nitro groups per every monomer group with acid in the presence of a metal oxidizable by said nitro groups; oxidizing the metal to metal oxide; and depositing the metal oxide on the surface of the polymer to form a magnetic metal oxide containing complex at the site of said nitro groups.