Sumitomo Metal Mining Company, Ltd.

Mabuchi Motor Co., Ltd.

Toshiya Iwai

Isao Shibuya

Yasuhiro Yamagata

Atsushi Kawamoto

Junichi Ishii

Hideki Matsuda

Naoki Kitahara

Kenji Muraoka

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 &#x3bc;m to 2.8 &#x3bc;m (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 &#x3bc;m to 12 &#x3bc;m (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.

Composition for bonded magnets, bonded magnet and integrally molded component

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Ichikawa, Japan

Toshiya Iwai