Title:
RUBBER CROSSLINKED MATERIAL
Document Type and Number:
WIPO Patent Application WO/2017/086358
Kind Code:
A1
Abstract:
Provided is a rubber crosslinked material produced by crosslinking a nitrile rubber composition. The nitrile rubber composition comprises: (a) a carboxyl-group-containing highly saturated nitrile rubber which has 5 to 60% by weight of an α,β-ethylenically unsaturated nitrile monomer unit and an α,β-ethylenically unsaturated monocarboxylic acid ester monomer unit and has a iodine value of 120 or less; (b) a surface-treated silicate salt; and (c) a polyamine-type crosslinking agent. In the nitrile rubber composition, the content of the polyamine-type crosslinking agent (c) is 0.1 to 20 parts by weight relative to 100 parts by weight of the carboxyl-group-containing highly saturated nitrile rubber (a). The rubber crosslinked material has such a property that, when such a compressive stress relaxation test that the rubber crosslinked material is retained at 150ºC in a 25%-compressed state is carried out, the time until the compressive stress is decreased to 50% of an initial compressive stress at the initiation of the compressive stress relaxation test is 300 hours or longer, wherein the initial compressive stress is a compressive stress that is measured 30 minutes after the initiation of the compressive stress relaxation test.
Inventors:
MOSAKI SHIHO (JP)
Application Number:
PCT/JP2016/083999
Publication Date:
May 26, 2017
Filing Date:
November 16, 2016
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C08L9/02; C08K5/17; C08K9/06; C09K3/10
Domestic Patent References:
| WO2009051102A1 | 2009-04-23 | |||
| WO2008001692A1 | 2008-01-03 | |||
| WO2009096518A1 | 2009-08-06 |
Foreign References:
| JP2008163074A | 2008-07-17 | |||
| JP2008179671A | 2008-08-07 | |||
| JP2008056793A | 2008-03-13 | |||
| JP2008138048A | 2008-06-19 |
Other References:
See also references of EP 3378891A4
Attorney, Agent or Firm:
TOKOSHIE PATENT FIRM (JP)
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