Resin-bonded magnet comprising a specific type of ferromagnetic

Details Resin-bonded magnet comprising a specific type of ferromagnetic Resin-bonded magnet comprising a specific type of ferromagnetic

1986-12-03

1987-08-25

Demers, Arthur P.

Compositions

Magnetic

With wax, bitumen, resin, or gum

252 6255, 335296, 335302, 335303, C08B 3504, H01F 126

Patent

active

046891633

ABSTRACT:
A resin-bonded magnet comprising particles of a melt-quenched ferromagnetic material of the formula, Fe-B-R, in which R represents Nd and/or Pr, and a binder resin dispersing the particles throughout the resin and fixing the particles. The binder resin comprises an oligomer having at least an alcoholic hydroxyl group and a block isocyanate with an active hydrogen-bearing compound. The resin-bonded magnet is preferably used in the from of a cylinder, ring or column having a defined outer diameter and a defined density when applied to permanent magnet motors.

REFERENCES:
patent: 4278556 (1981-07-01), Tada
patent: 4289549 (1981-09-01), Kasai
patent: 4308155 (1981-12-01), Tada et al.
patent: 4496395 (1985-01-01), Croat
patent: 4497722 (1985-02-01), Tsuchida
patent: 4562019 (1985-12-01), Inoue
patent: 4607068 (1986-08-01), Ansel

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