BONDED MAGNET

PROBLEM TO BE SOLVED: To obtain a bonded magnet that if composed of specific ferromagnetic powder and a specific bonding agent, and has an excellent corrosion resistance, control bonding strength, and mechanical strength, and is useful for electric miniature motors, etc. SOLUTION: This bonded magnet...

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Bibliographische Detailangaben
1. Verfasser:	YASHIRO TSUTOMU
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ELECTRICITY INDUCTANCES MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MAGNETS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSFORMERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a bonded magnet that if composed of specific ferromagnetic powder and a specific bonding agent, and has an excellent corrosion resistance, control bonding strength, and mechanical strength, and is useful for electric miniature motors, etc. SOLUTION: This bonded magnet comprises (A) 100 pts.wt. of ferromagnetic powder composed of transition metals, such as iron, and rare-earth metals, such as neodymium and samarium as main components, and ((B) preferably 1-10 pts.wt. of a bonding agent composed of an epoxy resin as the main component, and a polyurethane resin that contains, as a constitutional unit, one or more aminoquinone groups of formula I (Y is H, a 1-6C alkyl, aralkyl or phenyl; Z1 is a 2-18C alkylene, phenylene, aralkyl, alkarylene, etc.) and/or formula II (Z2 is 1-6C alkyl) in a quantity of 2-50wt.% based on the epoxy resin.