EP 0468449 A1 19920129 - Bonded rare earth magnet and a process for manufacturing the same.
Title (en)
Bonded rare earth magnet and a process for manufacturing the same.
Title (de)
Gebundener Seltenerdmagnet und Verfahren zur Herstellung.
Title (fr)
Aimant aggloméré en terre rare et procédé pour sa fabrication.
Publication
Application
Priority
- JP 19595890 A 19900724
- JP 21311090 A 19900811
- JP 30919990 A 19901114
Abstract (en)
A highly rustproof resin-bonded magnet side by using a specific rustproofing resin for coating the particles of a magnetic powder, bonding them to form a molded body, or coating its surface, or for two or all of those purposes. The specific resin is selected from ones containing groups of atoms having a power of forming a coordinate bond and a reducing action. More specifically, it is (a) a high molecular compound produced by reacting with an epoxy resin one or more of a polyhydric phenol having adjacent hydroxyls, a polyhydric phenolic carboxylic acid having adjacent hydroxyls, an ester of a polyhydric phenol and a polyhydric alcohol having adjacent hydroxyls, and a polycyclic and polyhydric phenol having adjacent hydroxyls, (b) a redox resin as a reduction agent, or (c) a high molecular compound produced by curing a mixture of ascorbic acid, or a derivative thereof, and an epoxy resin.
IPC 1-7
IPC 8 full level
H01F 1/057 (2006.01)
CPC (source: EP)
H01F 1/0578 (2013.01)
Citation (search report)
- [A] EP 0320064 A1 19890614 - PHILIPS NV [NL]
- [A] EP 0277416 A2 19880810 - CRUCIBLE MATERIALS CORP [US]
- [A] EP 0270934 A1 19880615 - TOHOKU METAL IND LTD [JP]
- [A] EP 0261579 A1 19880330 - TOKIN CORP [JP]
- [A] EP 0197712 B1 19900124
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0468449 A1 19920129; EP 0468449 B1 19940316; CA 2047592 A1 19920125; CA 2047592 C 19961015; DE 69101413 D1 19940421; DE 69101413 T2 19940707
DOCDB simple family (application)
EP 91112333 A 19910723; CA 2047592 A 19910723; DE 69101413 T 19910723