Title:
COMPOSITION FOR SYNTHETIC RESIN COMPOSITION AND FORMED RESIN MAGNET
Document Type and Number:
WIPO Patent Application WO/2002/033002
Kind Code:
A1
Abstract:
A composition for a synthetic resin magnet having a resin binder and a magnetic powder dispersed therein, characterized in that the resin binder comprises a thermoplastic resin as a primary resin and a polymerized fatty acid polyamide; a formed resin magnet such as a magnet roller for use in electrophotography prepared by forming the composition into a desired shape; and a formed resin magnet, characterized in that it is prepared by forming a composition for a resin magnet comprising a resin binder, a magnetic powder and a hindered phenol antioxidant at a temperature of 120 to 180 ° which is higher than usual, into a desired shape. The compositions can be used for improving the fluidity during melting and maintaining good melt flowability even when an increased amount of a magnetic powder is filled, and accordingly for producing a formed product having a high magnetic force without the lowering of processability.
Inventors:
KAWANO KOTA (JP)
DAIFUKU HIDEHARU (JP)
DAIFUKU HIDEHARU (JP)
Application Number:
PCT/JP2001/006545
Publication Date:
April 25, 2002
Filing Date:
July 30, 2001
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
KAWANO KOTA (JP)
DAIFUKU HIDEHARU (JP)
KAWANO KOTA (JP)
DAIFUKU HIDEHARU (JP)
International Classes:
G03G15/09; H01F1/08; (IPC1-7): C08L77/08; C08L101/00; C08K5/13; C08K3/00; H01F1/08
Foreign References:
| JP2001240740A | 2001-09-04 | |||
| JPH08167512A | 1996-06-25 | |||
| JPH0980914A | 1997-03-28 | |||
| JP2000012319A | 2000-01-14 | |||
| US5376291A | 1994-12-27 | |||
| JPH05304013A | 1993-11-16 | |||
| JPH05315115A | 1993-11-26 |
Attorney, Agent or Firm:
Kojima, Takashi (2F 16-12 Ginza 2-chome Chuo-ku, Tokyo, JP)
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