Epoxy bonded rare earth-iron magnets

Details Epoxy bonded rare earth-iron magnets Epoxy bonded rare earth-iron magnets

1984-03-08

1985-12-10

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

148 3157, 148103, 523457, C08K 322

Patent

active

045580774

ABSTRACT:
Novel epoxy compositions and a method of using them to make bonded rare earth-iron alloy magnets have been developed. The epoxy resins are polyglycidyl ethers of polyphenol alkanes that have high glass transition temperatures. The epoxy resin is provided in the form of a powder containing a suitable amount of a latent imidazole curing agent. The powder is mixed with rare earth-iron alloy particles, the mixture is compacted, and the resultant compact is heated to melt the powder and activate the curing agent. The alloy particles in the resultant magnet body are exceptionally resistant to flux loss upon aging.

REFERENCES:
patent: 3438937 (1969-04-01), Christie
patent: 3596350 (1971-08-01), Steingroever
patent: 3634323 (1972-01-01), Moran
patent: 3933536 (1976-01-01), Doser et al.
patent: 4141943 (1979-02-01), Houska
patent: 4335228 (1982-06-01), Beitchman et al.

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