Claims
- 1. A process for manufacturing a bonded rare earth magnet comprising coating the particles of a powder of a magnetic material containing at least 50 atom % of iron with a 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, or coating said particles with a mixture of said compound and another resin, or coating said particles with said compound and then with another resin to form a double resin coating on the surfaces of said particles; and molding said coated powder by using another synthetic resin as a binder.
- 2. A process as set forth in claim 1, wherein said binder is said compound, or said mixture.
- 3. A process as set forth in claim 1 or 2 wherein a surface of a molded product of said powder is coated with said compound, or said mixture of said compound and another resin, or said compound followed by said another resin forming a double resin coating on said surface.
- 4. A process as set forth in claim 3,
- wherein said powder is of Nd.sub.2 Fe.sub.14 B, an alloy of SmFe.sub.12, or an alloy of Fe.sub.16 N.sub.2.
- 5. A process for manufacturing a bonded rare earth magnet comprising molding a powder of a magnetic material containing at least 50 atom % of iron by using as a binder a 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, or a mixture of said compound and another resin.
- 6. A process as set forth in claim 5, wherein a surface of a molded product of said powder is coated with said compound, or is coated with said mixture of said compound and another resin, or is coated with said compound and then with said resin to form a double resin coating on said surface.
- 7. A process as set forth in claim 5 or 6 wherein said powder is of Nd.sub.2 Fe.sub.14 B, an alloy of SmFe.sub.12, or an alloy of Fe.sub.16 N.sub.2.
- 8. A process for manufacturing a bonded rear earth magnet comprising forming a molded product of a powder of a magnetic material containing at least 50 atom % of iron by using a resin as a binder, and coating the surface of said product with a 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, or coating said surface with a mixture of said compound and another resin, or coating said surface with said compound and then with another resin to form a double resin coating on said surface.
- 9. A process as set forth in claim 8, wherein said powder is of Nd.sub.2 Fe.sub.14 B, an alloy of SmFe.sub.12 or an alloy of Fe.sub.16 H.sub.2.
- 10. A process for coating magnetic material with resin and molding the coated material, comprising coating the particles of a powder of a magnetic material containing at least 50 atom % of iron with a 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, or coating said particles with a mixture of said compound and another resin, or coating said particles with said compound and then with another resin to form a double resin coating on the surfaces of said particles; and molding said coated powder by using another synthetic resin as a binder.
Priority Claims (3)
Number |
Date |
Country |
Kind |
2-195958 |
Jul 1990 |
JPX |
|
2-213110 |
Aug 1990 |
JPX |
|
2-309199 |
Nov 1990 |
JPX |
|
Parent Case Info
This is division of application Ser. No. 07/748,769, filed Aug. 22, 1991, now is U.S. Pat. No. 5,240,627 which is a continuation-in-part of application Ser. No. 07/733,749, filed Jul. 24, 1991, abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (2)
Number |
Date |
Country |
A10320064 |
Dec 1988 |
EPX |
B10197712 |
Jan 1990 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
748769 |
Aug 1991 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
733749 |
Jul 1991 |
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