Title:
NITRILE RUBBER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2015/005080
Kind Code:
A1
Abstract:
A nitrile rubber composition which contains 5 to 50 parts by weight of carbon black, 5 to 60 parts by weight of graphite having a mean particle diameter of 5μm or less, 5 to 50 parts by weight of a conductive carbon material other than these, and further contains, as antioxidants, 1 to 5 parts by weight of an alkylated diphenylamine consisting of a reaction product of diphenylamine with styrene and 2,4,4-trimethylpentene and 0.5 to 2.5 parts by weight of N,N'-di-2-naphthyl-p-phenylenediamine or dilauryl thiodipropionate, each quantity being relative to 100 parts by weight of nitrile rubber. This nitrile rubber composition can yield a vulcanization-molded product that not only keeps characteristics as conductive material but also satisfies characteristics requisite to an oil seal for a rolling bearing for an automobile or the like, namely, muddy water resistance, sealing properties and low-torque properties, and that exhibits a suppressed rubber volume change even when has been exposed to an antifreezing agent and then washed with water.
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Inventors:
YAMOTO HIROMITSU (JP)
KOMIYA EIJI (JP)
AOYAGI YUICHI (JP)
FURUKAWA TOMONORI (JP)
KOMIYA EIJI (JP)
AOYAGI YUICHI (JP)
FURUKAWA TOMONORI (JP)
Application Number:
PCT/JP2014/066134
Publication Date:
January 15, 2015
Filing Date:
June 18, 2014
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
C08L9/02; C08K3/04; C08K5/18; C08K5/372; F16C33/72; F16J15/32
Foreign References:
| JP2011140976A | 2011-07-21 | |||
| JP2004115637A | 2004-04-15 | |||
| JP2012097213A | 2012-05-24 | |||
| JP2012097213A | 2012-05-24 |
Other References:
See also references of EP 3020757A4
Attorney, Agent or Firm:
YOSHIDA Toshio et al. (JP)
Toshio Yoshida (JP)
Toshio Yoshida (JP)
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