- 专利标题： Method for producing purified polytetrafluoroethylene aqueous dispersion liquid, method for producing modified polytetrafluoroethylene powder, method for producing polytetrafluoroethylene molded body, and composition
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申请号： US16637601申请日： 2018-08-10
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公开(公告)号： US11851519B2公开(公告)日： 2023-12-26
- 发明人: Takahiro Taira , Kazuhiro Mishima , Chiaki Okui , Tadao Hayashi , Hirotoshi Yoshida , Yuuji Tanaka , Masayoshi Miyamoto , Taku Yamanaka , Taketo Kato
- 申请人： DAIKIN INDUSTRIES, LTD.
- 申请人地址： JP Osaka
- 专利权人： DAIKIN INDUSTRIES, LTD.
- 当前专利权人： DAIKIN INDUSTRIES, LTD.
- 当前专利权人地址： JP Osaka
- 代理机构： Sughrue Mion, PLLC
- 优先权： JP 17248553 2017.12.25 JP 18020460 2018.02.07
- 国际申请： PCT/JP2018/030161 2018.08.10
- 国际公布： WO2019/031617A 2019.02.14
- 进入国家日期： 2020-02-07
- 主分类号： C08F6/06
- IPC分类号： C08F6/06 ; C08F6/16 ; C08F6/24
摘要：
A method for producing an aqueous dispersion of purified polytetrafluoroethylene, the method including: removing or reducing a compound represented by Formula (1) or (2) below from an aqueous dispersion of polytetrafluoroethylene obtained using a hydrocarbon surfactant:
(H—(CF2)m—COO)pM1; or Formula (1):
(H—(CF2)n—SO3)qM2. Formula (2):
Also disclosed is a composition containing polytetrafluoroethylene substantially free from a compound represented by Formula (3) below and a molded body including the composition:
(H—(CF2)8—SO3)qM2. Formula (3):
(H—(CF2)m—COO)pM1; or Formula (1):
(H—(CF2)n—SO3)qM2. Formula (2):
Also disclosed is a composition containing polytetrafluoroethylene substantially free from a compound represented by Formula (3) below and a molded body including the composition:
(H—(CF2)8—SO3)qM2. Formula (3):
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