Ferromagnetic organic substance having triaryl methane structure

Details Ferromagnetic organic substance having triaryl methane structure Ferromagnetic organic substance having triaryl methane structure

1989-08-15

1990-09-04

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

528242, 528243, 528249, 528251, 528253, 528266, 528270, 528396, 528481, 528501, 528502, 528503, C08G 400

Patent

active

049546074

ABSTRACT:
A ferromagnetic organic substance having a triaryl methane structure and a free radical concentration of methine carbon positions of at least 10.sup.17 radicals/g, preferably at least 10.sup.18 radials/g, is provided by polycondensing a condensed polynuclear aromatic compound or an electron donating group substituted monocyclic aromatic compound with an aromatic aldehyde in the presence of an acid catalyst, to produce a precondensate having a softening point between 30.degree. C. and 120.degree. C. and being soluble in various organic solvents, and subjecting the resulting precondensate to a dehydrogenation treatment and a purification treatment, followed by molding. Alternatively, a preferable ferromagnetic organic substance having a triaryl methane structure is also manufactured by self-polycondensing an aromatic derivative having at least one electron donating group and at least one aldehyde group in the presence of an acid catalyst and then dehydrogenating the resulting polymer by light-irradiation and/or treatment with an oxidizing agent.

REFERENCES:
patent: 4002616 (1977-01-01), Neumer
patent: 4346212 (1982-08-01), Robinson et al.
patent: 4403089 (1983-09-01), Buck
patent: 4758653 (1988-07-01), Otani et al.
patent: 4866157 (1989-09-01), Otani et al.

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