Title:
COMPOSITION FOR BONDED MAGNETS, BONDED MAGNET AND INTEGRALLY MOLDED COMPONENT
Document Type and Number:
WIPO Patent Application WO/2016/013404
Kind Code:
A1
Abstract:
Provided is a composition for bonded magnets, which exhibits good fluidity during molding and enables the production of a bonded magnet having durability in terms of thermal shock test. This composition for bonded magnets is capable of providing a bonded magnet obtained therefrom with excellent bonding strength in cases where the bonded magnet is bonded with a metal component via an adhesive.
A composition for bonded magnets according to the present invention contains from 88% by mass to 91% by mass (inclusive) of a samarium-iron-nitrogen magnet powder having an average particle diameter of from 1.8 μm to 2.8 μm (inclusive), from 0.5% by mass to 2.5% by mass (inclusive) of a polyamide elastomer having a tensile elongation at break of 400% or more and a bending modulus of elasticity of 100 MPa or more, from 0.5% by mass to 2.0% by mass (inclusive) of carbon fibers having fiber diameters of from 10 μm to 12 μm (inclusive) and from 0.3% by mass to 1.0% by mass (inclusive) of a carboxylic acid ester, with the balance made up of a polyamide resin which is composed of a polyamide 12 having a weight average molecular weight (Mw) of from 4,500 to 7,500 (inclusive) as determined by molecular weight distribution measurement.
More Like This:
| JP3417420 | MAGNETIC ROLL |
| JPS5383925 | MANUFACTURE OF RARE EARTH ELEMENTS.COBALT MAGNET |
| JPH0311704 | BONDED MAGNET AND MANUFACTURE THEREOF |
Inventors:
MATSUDA HIDEKI (JP)
MURAOKA KENJI (JP)
IWAI TOSHIYA (JP)
ISHII JUNICHI (JP)
KAWAMOTO ATSUSHI (JP)
KITAHARA NAOKI (JP)
SHIBUYA ISAO (JP)
YAMAGATA YASUHIRO (JP)
MURAOKA KENJI (JP)
IWAI TOSHIYA (JP)
ISHII JUNICHI (JP)
KAWAMOTO ATSUSHI (JP)
KITAHARA NAOKI (JP)
SHIBUYA ISAO (JP)
YAMAGATA YASUHIRO (JP)
Application Number:
PCT/JP2015/069733
Publication Date:
January 28, 2016
Filing Date:
July 09, 2015
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
MABUCHI MOTOR CO (JP)
MABUCHI MOTOR CO (JP)
International Classes:
H01F1/08; B22F1/00; B22F3/00; C08K3/10; C08K5/10; C08K7/06; C08L77/00; C22C38/00; H01F1/055; H01F7/02
Foreign References:
| JP2008199035A | 2008-08-28 | |||
| JP2001123067A | 2001-05-08 | |||
| JP2004352792A | 2004-12-16 | |||
| JP2010251545A | 2010-11-04 | |||
| JPS60225403A | 1985-11-09 |
Other References:
See also references of EP 3174073A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
Download PDF: