High-performance anisotropic plastics magnet and a process for p

Details High-performance anisotropic plastics magnet and a process for p High-performance anisotropic plastics magnet and a process for p

1975-04-28

1977-05-10

Edmundson, F.C.

Compositions

Magnetic

With wax, bitumen, resin, or gum

252 6251, H01F 100, H01F 126

Patent

active

040227014

ABSTRACT:
An anisotropic plastics magnet having a maximum energy product (BH)max not lower than 0.9 MG Oe, a remanence Br not lower than 2000G and a coercive force Hc not lower than 1800 Oe, and being composed at least one of ferromagnetic powders having a large magnetic anisotropy constant and at least one selected from the group consisting of metal-cross-linked copolymers of .alpha.-olefin and .alpha.,.beta. unsaturated mono- or dicarboxylic acid and saponified copolymers of ethylene and vinyl acetate, the axis of the easy magnetization of said ferromagnetic powders being oriented substantially in one direction, and a process for producing the same comprising mixing the ferromagnetic powder and the resin and forming the mixture under heating while a magnetic field is being applied.

REFERENCES:
patent: 2999275 (1961-09-01), Blume
patent: 3117092 (1964-01-01), Parker
patent: 3221315 (1965-11-01), Brown et al.
patent: 3649541 (1972-03-01), Ingersoll
patent: 3677947 (1972-07-01), Ray et al.
patent: 3867299 (1975-02-01), Rohatgi
patent: 3884823 (1975-05-01), Clendenen et al.

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