H - Electricity – 01 – F
Patent
H - Electricity
01
F
31/121
H01F 1/28 (2006.01) H01F 1/06 (2006.01)
Patent
CA 1215223
ABSTRACT OF THE DISCLOSURE The plastic magnet composition provided by the inven- tion comprises a thermoplastic resin as a binder and a pow- der of a metallic or alloy-type magnet which is coated on the particle surface with a phosphorus-containing compound having at least one phosphorus-to-oxygen linkage in a mole- cule such as phosphoric acid and related compounds. By vir- tue of the surface coating, the magnet powder is freed from the degradation by air oxidation and the danger of ignition in the molding process so that plastic magnets of high per- formance can be readily manufactured with safety. The ad- vantages of the coating layer are further increased when the coating layer is formed of a combination of the phosphorus- containing compound and an organic dye compound. An over- coating on the thus coated magnet powder with an organo- polysiloxane has an effect of increased lubricity.
457536
Abe Tokuji
Kitamura Hajime
Tsuchida Michinori
Gowling Lafleur Henderson Llp
Shin-Etsu Chemical Co. Ltd.
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