COMPOSITION FOR BONDED MAGNETS, BONDED MAGNET AND INTEGRALLY MOLDED COMPONENT

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United States of America Patent

SERIAL NO

15327104

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO METAL MINING CO LTDTOKYO 105-8716
MABUCHI MOTOR CO LTD430 MATSUHIDAI MATSUDO CITY CHIBA 270-2280

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishii, Junichi Ichikawa-shi, JP 91 1350
Iwai, Toshiya Ichikawa-shi, JP 1 0
Kawamoto, Atsushi Tokyo, JP 36 249
Kitahara, Naoki Iwanai-gun, JP 9 22
Matsuda, Hideki Ichikawa-shi, JP 102 1026
Muraoka, Kenji Ichikawa-shi, JP 58 1338
Shibuya, Isao Matsudo-shi, JP 19 71
Yamagata, Yasuhiro Matsudo-shi, JP 14 17

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