METHOD FOR PRODUCING PURIFIED POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION LIQUID, METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE POWDER, METHOD FOR PRODUCING POLYTETRAFLUOROETHYLENE MOLDED BODY, AND COMPOSITION

WIPO Patent Application WO/2019/031617

A1

The purpose of the present invention is to obtain a polytetrafluoroethylene aqueous dispersion liquid from which fluorine-containing compounds have been removed or diminished. The present invention is a method for producing a purified polytetrafluoroethylene aqueous dispersion liquid, the method being characterized by including a step of removing or diminishing compounds represented by general formula (1) or (2) from a polytetrafluoroethylene aqueous dispersion liquid obtained using a hydrocarbon-based surfactant. General formula (1): (H-(CF2)m-COO)pM1 General formula (2): (H-(CF2)n-SO3)qM2

TAIRA TAKAHIRO (JP)
MISHIMA KAZUHIRO (JP)
OKUI CHIAKI (JP)
HAYASHI TADAO (JP)
YOSHIDA HIROTOSHI (JP)
TANAKA YUUJI (JP)
MIYAMOTO MASAYOSHI (JP)
YAMANAKA TAKU (JP)
KATO TAKETO (JP)

PCT/JP2018/030161

February 14, 2019

August 10, 2018

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DAIKIN IND LTD (JP)

C08F6/16; C08F2/30; C08F14/26; C08J5/18; C08K5/09; C08K5/42; C08L27/18; C08J3/16

WO2009020187A1	2009-02-12
WO2007049517A1	2007-05-03
WO2009069320A1	2009-06-04
WO2005063827A1	2005-07-14

JP2005325327A	2005-11-24
JP2013528663A	2013-07-11
JP2002532583A	2002-10-02
JP2007511657A	2007-05-10
JPS4021483B1
CN104861091A	2015-08-26
JP2009533509A	2009-09-17
JP2013542309A	2013-11-21
JP2013542308A	2013-11-21
JP2013542310A	2013-11-21
US6841616B2	2005-01-11

YASUTOMI & ASSOCIATES (JP)

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