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Title:
MODIFIED POLYTETRAFLUOROETHYLENE FINE POWDER AND UNIAXIALLY ORIENTED POROUS BODY
Document Type and Number:
WIPO Patent Application WO/2015/080289
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a modified polytetrafluoroethylene fine powder for obtaining an oriented body having high strength, small pore size, and excellent homogeneity. The present invention is a modified polytetrafluoroethylene fine powder characterized by having non-molten secondary workability, having a standard specific gravity of 2.155 or lower, containing 0.015 mol% or more polymerized units from perfluoro(methylvinylether) relative to the total monomer units, being obtained by emulsion copolymerization of tetrafluoroethylene and at least perfluoro(methylvinylether) in the presence of a fluorine-containing surfactant having a Log POW of 3.4 or less, and having an extrusion pressure of 20.0 MPa or lower.

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Inventors:
YAMANAKA TAKU
ONO MAKOTO
YASUDA KOHEI
YAMADA MASAHIKO
CHAEN SHINICHI
SAWADA YASUHIKO
TAIRA TAKAHIRO
YOSHIDA HIROTOSHI
KATO TAKETO
Application Number:
PCT/JP2014/081771
Publication Date:
June 04, 2015
Filing Date:
December 01, 2014
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
C08F214/26; B29C55/04; C08F216/14; C08J9/00
Domestic Patent References:
WO2013027850A12013-02-28
WO2013115278A12013-08-08
WO2007046345A12007-04-26
WO2010113950A12010-10-07
WO2005061567A12005-07-07
WO2014084397A12014-06-05
WO2007046345A12007-04-26
WO2009001894A12008-12-31
WO2010113950A12010-10-07
WO2003033555A12003-04-24
WO2007024762A22007-03-01
WO2005042593A12005-05-12
WO2008060461A12008-05-22
WO2007046377A12007-04-26
WO2007119526A12007-10-25
WO2007046482A12007-04-26
Foreign References:
JPH01247408A1989-10-03
JP2014227421A2014-12-08
JP2000143727A2000-05-26
JP2002201217A2002-07-19
JPH11240917A1999-09-07
JP4951970B22012-06-13
US20070015864A12007-01-18
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US20080015319A12008-01-17
US3250808A1966-05-10
US3271341A1966-09-06
JP2003119204A2003-04-23
JP2005527652A2005-09-15
Other References:
See also references of EP 3053937A4
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
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