Plastic magnets impregnated with a dye-coated magnet alloy powde

Details Plastic magnets impregnated with a dye-coated magnet alloy powde Plastic magnets impregnated with a dye-coated magnet alloy powde

1983-12-14

1985-09-24

Lesmes, George F.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

252 6254, 524439, 524440, 524606, 428403, 428900, H01F 106, H01F 702

Patent

active

045433828

ABSTRACT:
The invention provides a very simple but effective means for preventing surface oxidation of fine metal powders by coating the metal powder with an organic dye. This method of surface-oxidation prevention is particularly useful for the preparation of a so-called plastic magnet which is prepared by uniformly blending a dye-coated fine powder of a magnetic alloy such as a rare earth-cobalt based permanent magnet with a thermoplastic resin such as a nylon or polyphenylene sulfide resin followed by molding the resin-powder blend into a magnet form. In addition to the remarkably improved magnetic properties of the thus prepared plastic magnets as a result of high loading and absence of degradation by oxidation, the danger of spontaneous ignition of the magnet powder in molding can be eliminated almost completely. Surface treatment of the dye-coated magnet powder with a silicone fluid gives further improved results.

REFERENCES:
patent: 3502583 (1970-03-01), Graham
patent: 3989648 (1976-11-01), Lenhard et al.
patent: 4190548 (1980-02-01), Baermann
patent: 4308155 (1981-12-01), Tada et al.
patent: 4309480 (1982-01-01), Armanini
patent: 4374676 (1983-02-01), Senda et al.
patent: 4421660 (1983-12-01), Hajna
patent: 4434009 (1984-02-01), Banba
patent: 4443527 (1984-04-01), Heikens et al.
patent: 4497722 (1985-02-01), Tsuchida et al.

Affiliated with

Also associated with

Rating

Plastic magnets impregnated with a dye-coated magnet alloy powde does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Plastic magnets impregnated with a dye-coated magnet alloy powde, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plastic magnets impregnated with a dye-coated magnet alloy powde will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1614685