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Title:
MAGNETIC RUBBER COMPOSITION, MAGNETIC RUBBER MOLDED ARTICLE, AND MAGNETIC ENCODER
Document Type and Number:
WIPO Patent Application WO/2016/052598
Kind Code:
A1
Abstract:
 A magnetic rubber molded article obtained by crosslinking a magnetic rubber composition that contains an acrylic rubber (A), a magnetic powder (B), and a crosslinking agent (C), wherein the magnetic rubber composition is characterized in that the acrylic rubber (A) is a polymer including 90-99 mass% of acrylic acid ester units and 1-10 mass% of crosslinkable monomer units having a carboxyl group, the crosslinking agent (C) is a polyamine compound, and the composition includes 200-1,500 parts by mass of magnetic powder (B) and 0.2-10 parts by mass of crosslinking agent (C) per 100 parts by mass of acrylic rubber (A). A magnetic rubber molded article having exceptional mold release properties during molding and exceptional resistance to thermal aging is thereby obtained.

Inventors:
SAKATE, Kazushi (1106-11 Okanda, Akaiwa-sh, Okayama 21, 〒7012221, JP)
KASAMOTO, Tadashi (1106-11 Okanda, Akaiwa-sh, Okayama 21, 〒7012221, JP)
KATAYAMA, Tatsuo (1106-11 Okanda, Akaiwa-sh, Okayama 21, 〒7012221, JP)
Application Number:
JP2015/077688
Publication Date:
April 07, 2016
Filing Date:
September 30, 2015
Export Citation:
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Assignee:
UCHIYAMA MANUFACTURING CORP. (338 Enami, Naka-ku Okayama-sh, Okayama 04, 〒7028004, JP)
International Classes:
C08L33/08; C08K3/08; C08K5/01; C08K5/17; C08L83/06; H01F1/11; H01F1/117; H01F13/00
Domestic Patent References:
WO2006132225A12006-12-14
WO2015012329A12015-01-29
WO2015133465A12015-09-11
Foreign References:
JP2001115044A2001-04-24
JP2011144364A2011-07-28
JP2008169247A2008-07-24
JP2010271331A2010-12-02
JP2015076515A2015-04-20
Attorney, Agent or Firm:
NAKATSUKASA, Shigeki et al. (Setouchi International Patent Firm, Growth-2 Building 4-9-1, Ima, Kita-ku, Okayama-sh, Okayama 75, 〒7000975, JP)
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