Title:
FLUORORESIN, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING FLUORORESIN PARTICLES
Document Type and Number:
WIPO Patent Application WO/2020/075724
Kind Code:
A1
Abstract:
The present invention is: a fluororesin which contains a residue unit represented by general formula (1), gives a hot pressed molded article having a haze value of 2% or less (at a thickness of 1 mm) and has a low haze value as a molten molding; and a method for producing same. In formula (1), Rf1, Rf2, Rf3 and Rf4 each independently denote one type selected from the group consisting of a fluorine atom, a straight chain perfluoroalkyl group having 1-7 carbon atoms, a branched chain perfluoroalkyl group having 3-7 carbon atoms and a cyclic perfluoroalkyl group having 3-7 carbon atoms. A perfluoroalkyl group may have an etheric oxygen atom. Rf1, Rf2, Rf3 and Rf4 may bond to each other to form a ring having 4-8 carbon atoms. The ring may be one that includes an etheric oxygen atom. The present invention is also a method for producing particles of a fluororesin that includes a fluorine-containing aliphatic ring structure. The method includes a precipitation step in which particles of a fluororesin (A) that includes a fluorine-containing aliphatic ring structure are precipitated by lowering the temperature of a fluororesin (A) solution in which the fluororesin (A) is dissolved in a solvent (B). The method exhibits excellent productivity and enables removal of foreign objects.
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Inventors:
SAKAGUCHI KOTA (JP)
SHIMONO TOMOYA (JP)
NAGAI TOMONARI (JP)
IWANAGA KAZUNARI (JP)
YUMINO SHOHEI (JP)
TANABIKI MASAO (JP)
DOI TORU (JP)
SHIMONO TOMOYA (JP)
NAGAI TOMONARI (JP)
IWANAGA KAZUNARI (JP)
YUMINO SHOHEI (JP)
TANABIKI MASAO (JP)
DOI TORU (JP)
Application Number:
PCT/JP2019/039698
Publication Date:
April 16, 2020
Filing Date:
October 08, 2019
Export Citation:
Assignee:
TOSOH CORP (JP)
International Classes:
C08F24/00; C08J3/14
Domestic Patent References:
| WO2008075545A1 | 2008-06-26 | |||
| WO2014156996A1 | 2014-10-02 |
Foreign References:
| JPH09512854A | 1997-12-22 | |||
| JPS4329154B1 | 1968-12-13 | |||
| JP2007504125A | 2007-03-01 | |||
| EP3239215A1 | 2017-11-01 | |||
| EP2738603A1 | 2014-06-04 | |||
| EP3582278A1 | 2019-12-18 | |||
| EP0773244A1 | 1997-05-14 |
Other References:
MIKES ET AL.: "Synthesis and characterization of an amorphous perfluoropolymer: poly(perfluoro-2- methylene-4-methyl-1, 3-dioxolane", MACROMOLECULES, vol. 38, 21 April 2005 (2005-04-21), pages 4237 - 4245, XP055702867
LIU ET AL.: "Free-radical polymerization of dioxolane and dioxane derivatives: effect of fluorine substituents on the ring opening polymerization", J. POLYMER SCIENCE, vol. 42, 8 September 2004 (2004-09-08), pages 5180 - 5188, XP002315310, DOI: 10.1002/pola.20309
MIKES ET AL.: "Characterization and properties of semicrystalline and amorphous perfluoropolymer: poly(perfluoro-2-methylene-1, 3-dioxolane", POLYMER ADVANCED TECHNOLOGIES, vol. 22, 2 May 2011 (2011-05-02), pages 1272 - 1277, XP055702872
MACROMOLECULES, vol. 38, 2005, pages 4237 - 4245
KAGAKU SOCHI, CHEMICAL APPARATUSES, August 1995 (1995-08-01), pages 71 - 79
SHINKO PFAUDLER, TECHNICAL REPORT, vol. 28, no. 8, October 1984 (1984-10-01), pages 13 - 16
FRANTISEK MIKES, YU YANG, IWAO TERAOKA, TAKAAKI ISHIGURE, YASUHIRO KOIKE, YOSHIYUKI OKAMOTO: "Synthesis and Characterization of an Amorphous Perfluoropolymer: Poly(perfluoro-2-methylene-4-methyl-1,3-dioxolane)", MACROMOLECULES, vol. 38, no. 10, 1 May 2005 (2005-05-01), US , pages 4237 - 4245, XP055702867, ISSN: 0024-9297, DOI: 10.1021/ma050085u
OKAMOTO, Y. MIKES, F. YANG, Y. KOIKE, Y.: "The effect of fluorine substituents on the polymerization mechanism of 2-methylene-1,3-dioxolane and properties of the polymer products", JOURNAL OF FLUORINE CHEMISTRY, vol. 128, no. 3, 8 February 2007 (2007-02-08), NL , pages 202 - 206, XP005880378, ISSN: 0022-1139, DOI: 10.1016/j.jfluchem.2006.12.005
LIU ET AL.: "Free-radical polymerization of dioxolane and dioxane derivatives: effect of fluorine substituents on the ring opening polymerization", J. POLYMER SCIENCE, vol. 42, 8 September 2004 (2004-09-08), pages 5180 - 5188, XP002315310, DOI: 10.1002/pola.20309
MIKES ET AL.: "Characterization and properties of semicrystalline and amorphous perfluoropolymer: poly(perfluoro-2-methylene-1, 3-dioxolane", POLYMER ADVANCED TECHNOLOGIES, vol. 22, 2 May 2011 (2011-05-02), pages 1272 - 1277, XP055702872
MACROMOLECULES, vol. 38, 2005, pages 4237 - 4245
KAGAKU SOCHI, CHEMICAL APPARATUSES, August 1995 (1995-08-01), pages 71 - 79
SHINKO PFAUDLER, TECHNICAL REPORT, vol. 28, no. 8, October 1984 (1984-10-01), pages 13 - 16
FRANTISEK MIKES, YU YANG, IWAO TERAOKA, TAKAAKI ISHIGURE, YASUHIRO KOIKE, YOSHIYUKI OKAMOTO: "Synthesis and Characterization of an Amorphous Perfluoropolymer: Poly(perfluoro-2-methylene-4-methyl-1,3-dioxolane)", MACROMOLECULES, vol. 38, no. 10, 1 May 2005 (2005-05-01), US , pages 4237 - 4245, XP055702867, ISSN: 0024-9297, DOI: 10.1021/ma050085u
OKAMOTO, Y. MIKES, F. YANG, Y. KOIKE, Y.: "The effect of fluorine substituents on the polymerization mechanism of 2-methylene-1,3-dioxolane and properties of the polymer products", JOURNAL OF FLUORINE CHEMISTRY, vol. 128, no. 3, 8 February 2007 (2007-02-08), NL , pages 202 - 206, XP005880378, ISSN: 0022-1139, DOI: 10.1016/j.jfluchem.2006.12.005
Attorney, Agent or Firm:
SIKS & CO. (JP)
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