Permanent magnet and process for producing the same
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsTakashi Ooe, Minoru Nagai, Yoshitaka Momotari
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Abstract
The permanent magnet which is excellent in moldability, capable of maintaining the dimensional stability and magnetic properties during manufacturing steps, and having good dimensional stability at high temperature, water proofness, oil resistance and solvent resistance, can be constituted by a shaped substance containing, as major ingredients, rare-earth magnet powder and, as binder materials which has been cured and the process for producing the same.
Claims8
A permanent magnet obtained by molding a composition comprising rate-earth magnet powder and, as binder materials, a dehydrated esterification product of a polycarboxylic acid and a polyol and an epoxy compound capable of crosslinking through an addition reaction with the remaining carboxylic acid and hydroxyl groups of said esterification products, and simultaneously with or subsequently to the molding, crosslinking or curing the binder materials through the addition reaction.
A process for producing a permanent magnet comprising molding to prepare a shaped substance using rare-earth magnet powder and, as binder materials, an esterification product of polycarboxylic acid and polyol and an epoxy compound capable of crosslinking by an addition reaction with the esterification product, and subjecting the shaped substance to a heat curing treatment at the same time with or after the molding.
Dependencies are inferred from the claim text.