Title:
FLUORORUBBER COMPOSITION, CROSSLINKED FLUORORUBBER, PROCESS FOR PRODUCTION OF THE SAME, AND CROSSLINKED FLUORORUBBER FOR O-RINGS
Document Type and Number:
WIPO Patent Application WO/2008/038555
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a fluororubber composition which does not suffer from
the blooming in extrusion of talc contained in a heat- and cold-resistant and
colorable fluororubber and can give products having functions equivalent to
those of conventional mass-produced materials and which makes it possible to
reduce remarkably the rejection rate in preparing green stock; and a process
for production of crosslinked fluororubber. [MEANS FOR SOLVING PROBLEMS] A
composition which comprises as the essential components a fluororubber consisting
of a peroxide -vulcanizable fluoropolymer, a peroxide-type crosslinking agent,
and a heat-resistant filler consisting of calcined talc having a hydrophilic
surface, characterized in that the content of the calcined talc is 2 to 20 parts
by weight per 100 parts by weight of the fluoropolymer and that the peroxide -vulcanizable
fluoropolymer is preferably a low-temperature type ternary fluoropolymer
having a TR10 value of -40 to -25°C, still preferably a vinylidene fluoride/perfluoro(methyl
vinyl ether)/tetrafluoroethylene terpolymer.
Inventors:
SANO HIROYUKI (JP)
Application Number:
PCT/JP2007/068205
Publication Date:
April 03, 2008
Filing Date:
September 19, 2007
Export Citation:
Assignee:
NOK CORP (JP)
SANO HIROYUKI (JP)
SANO HIROYUKI (JP)
International Classes:
C08L27/12; C08K3/34
Foreign References:
| JPH07258337A | 1995-10-09 | |||
| JP2005539115A | 2005-12-22 | |||
| JPH0881629A | 1996-03-26 | |||
| JPH10139970A | 1998-05-26 | |||
| JP2005053956A | 2005-03-03 |
Other References:
See also references of EP 2070981A4
Attorney, Agent or Firm:
MARUYAMA, Eiichi (6-14-9 Sotokand, Chiyoda-ku Tokyo 21, JP)
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