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AssigneeDirector-General of Agency of Industrial Science and Technology
InventorsKazuhisa Murata, Akio Matsuda, Takashi Masuda
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An organic ferromagnetic substance and a process for producing same are disclosed, which substance is a product of the carbonization of at least one polymer in mid course of graphitization selected from (a) an aromatic polymer having a structure such that the aromatic compounds are connected via alkylene chains which may be substituted by an alkyl or aryl group, (b) a polymer of a triarymethane, (c) a polymer of an acetylene compound and (d) a polymer of an .alpha., .beta.-unsaturated compound, characterized in that the ferromagnetic substance contains 1-10 hydrogen atoms per 100 carbon atoms. This organic ferromagnetic substance can be produced in a high yield from commercially available polymers in a simple manner and possesses excellent stability to heat, chemicals and weathering action. Accordingly, this substance can be used in various industrial fields.
An organic ferromagnetic substance which comprises a carbonaceous substance of at least one polymer is mid course of graphitization selected from (a) an aromatic polymer having a structure wherein the aromatic moieties are connect ed via alkylene or alkylene substituted by an alkyl or aryl group, (b) a polymer of a methane, (c) a polymer of an acetylene compound and (d) a polymer of a .alpha., .beta.-unsaturated compound, said carbonaceous substance containing 1-10 hydrogen atoms per 100 carbon atoms and being produced by heating said one polymer at a temperature of 600.degree.-3000.degree. C. for 10-30 hours in a vacuum or inert gas.
A process for producing an organic ferromagnetic substance which comprises subjecting at least one polymer selected from (a) an aromatic polymer having a structure wherein the aromatic moieties are connected via alkylene chains or alkylene chains substituted by an alkyl or aryl group, (b) a polymer of a triarylmethane, (c) a polymer of an acetylene compound and (d) a copolymer of an .alpha., .beta.-unsaturated compound, singly or together with an auxiliary inorganic material and/or organic material other than the above polymers (a)-(d), to a heat treatment at a temperature above 500.degree. C. for 10-30 hours, under vacuum or in the presence of an inert gas, to form a carbonaceous substance in mid course of graphitization which contains 1-10 hydrogen atoms per 100 carbon atoms.
Dependencies are inferred from the claim text.