Title:
磁性ゴム組成物、磁性ゴム成形品、磁気エンコーダ及びそれらの製造方法
Document Type and Number:
Japanese Patent JP6682113
Kind Code:
B2
Abstract:
Provided is a magnetic rubber composition containing hydrogenated nitrile rubber (A), ferrite magnetic powder (B), a vulcanizing agent (C), and stearic acid (D), wherein the hydrogenated nitrile rubber (A) has a Mooney viscosity (ML1+4, 100°C) of 45-80, the magnetic rubber composition contains 1250-1600 parts by mass of the ferrite magnetic powder (B), 0.1-4 parts by mass of the vulcanizing agent (C), and 2.5-8 parts by mass of the stearic acid (D) to 100 parts by mass of the hydrogenated nitrile rubber (A), and the content of the ferrite magnetic powder (B) relative to the mass of the entire magnetic rubber composition is 91-93 mass%. Since the magnetic rubber composition has excellent fluidity while containing magnetic powder of an extremely high density, by vulcanizing the foregoing, it is possible to obtain a magnetic rubber molded article provided with both excellent magnetic properties and good mechanical properties.
Inventors:
Kazushi Sakate
Tadashi Kasamoto
Kawai Ryo
Tadashi Kasamoto
Kawai Ryo
Application Number:
JP2015226082A
Publication Date:
April 15, 2020
Filing Date:
November 18, 2015
Export Citation:
Assignee:
Uchiyama Industry Co., Ltd.
International Classes:
C08L15/00; C08K3/22; C08K5/09; G01D5/245; H01F7/02; H01F41/02
Domestic Patent References:
| JP2003282315A | ||||
| JP2011079886A | ||||
| JP2006066828A | ||||
| JP63284804A |
Foreign References:
| WO2001041162A1 | ||||
| CN104200952A | ||||
| CN103821941A | ||||
| CN1429858A | ||||
| WO2002103296A1 | ||||
| WO2014129309A1 | ||||
| WO2015174546A1 |
Attorney, Agent or Firm:
Setouchi International Patent Firm