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Title:
METHOD FOR PRODUCING POLYTETRAFLUOROETHYLENE POWDER, AND POLYTETRAFLUOROETHYLENE POWDER
Document Type and Number:
WIPO Patent Application WO/2023/277137
Kind Code:
A1
Abstract:
Provided is a method for producing polytetrafluoroethylene powder, the method comprising: suspension-polymerizing tetrafluoroethylene in an aqueous medium to prepare suspension-polymerized particles of polytetrafluoroethylene having non-melt processability; drying the suspension-polymerized particles to prepare dried particles; performing a fluorine radical treatment on the dried particles to prepare fluorine radical-treated particles; and crushing the fluorine radical-treated particles to produce polytetrafluoroethylene powder.

Inventors:
TAIRA TAKAHIRO (JP)
MISHIMA KAZUHIRO (JP)
TANAKA TAKAYUKI (JP)
KUSUNOKI TAKEKI (JP)
MIYAMOTO MASAYOSHI (JP)
MINAMIYAMA TOMOKI (JP)
TSUKAMOTO MITSUO (JP)
ICHIKAWA KENJI (JP)
YAMABE TAKUYA (JP)
YOSHIDA HIROTOSHI (JP)
KATO TAKETO (JP)
YAMANAKA TAKU (JP)
Application Number:
PCT/JP2022/026257
Publication Date:
January 05, 2023
Filing Date:
June 30, 2022
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
C08J3/12; C08F8/20; C08F14/26
Domestic Patent References:
WO2019156071A12019-08-15
WO2010114033A12010-10-07
WO2013146078A12013-10-03
WO2013005743A12013-01-10
WO2014123075A12014-08-14
WO2005042593A12005-05-12
WO2008060461A12008-05-22
WO2007046377A12007-04-26
WO2007046482A12007-04-26
WO2007046345A12007-04-26
WO2013189824A12013-12-27
WO2013189826A12013-12-27
WO2019161153A12019-08-22
WO2003035724A12003-05-01
Foreign References:
JPS63270740A1988-11-08
JPH10147617A1998-06-02
JPS62104822A1987-05-15
JP2001048922A2001-02-20
US20070015864A12007-01-18
US20070015865A12007-01-18
US20070015866A12007-01-18
US20070276103A12007-11-29
US20070117914A12007-05-24
US20070142541A12007-06-21
US20080015319A12008-01-17
US3250808A1966-05-10
US3271341A1966-09-06
JP2003119204A2003-04-23
JP2007119526A2007-05-17
US20140228531A12014-08-14
Attorney, Agent or Firm:
TOKOSHIE PATENT FIRM (JP)
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