Rare earth bonded magnet including amino-acid compound as...

Details Rare earth bonded magnet including amino-acid compound as... Rare earth bonded magnet including amino-acid compound as...

2007-11-27

2007-11-27

Koslow, C. Melissa (Department: 1755)

Compositions

Magnetic

Free metal or alloy containing

C252S062540, C148S104000

Reexamination Certificate

active

11066145

ABSTRACT:
In a rare earth bonded magnet comprising a mixture of rare earth magnetic powder, thermosetting resin, and lubricant, the lubricant is constituted by amino-acid compound, specifically either N-lauroyl-L-lysine or N-lauroyl-asparaginic acid. The content of the amino-acid compound as lubricant in the mixture is set to range between 0.01 wt % and 1.0 wt % of the magnetic powder. Since the amino-acid compound has a high decomposition point, the resultant magnet after heat-curing treatment has a sufficient mechanical strength. Also, the amino-acid compound is nonhygroscopic, and therefore oxidation resistance and humidity resistance are good enough. Further, since the amino-acid compound produces a small amount of outgas, the resultant magnet can be suitably and reliably used in a hard disk drive which has stringent requirements, especially on outgas.

REFERENCES:
patent: 6001272 (1999-12-01), Ikuma et al.
patent: 02-158106 (1990-06-01), None
patent: A 11-45816 (1999-02-01), None
patent: A 2000-36403 (2000-02-01), None

Affiliated with

Also associated with

Rating

Rare earth bonded magnet including amino-acid compound as... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rare earth bonded magnet including amino-acid compound as..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth bonded magnet including amino-acid compound as... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3862336