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公开(公告)号：US09976022B2
公开(公告)日：2018-05-22
申请号：US15316031
申请日：2015-06-04
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yoshinori Nanba , Dai Fukami , Takuya Yamabe , Taketo Kato , Makoto Ono , Takahiro Taira , Hirotoshi Yoshida , Taku Yamanaka
IPC: C08L27/18 , C08F114/26
Abstract: The present invention provides a polytetrafluoroethylene aqueous dispersion containing high-molecular-weight, significantly small polytetrafluoroethylene particles and having excellent dispersion stability. The present invention relates to an aqueous dispersion containing polytetrafluoroethylene particles containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene. The polytetrafluoroethylene particles have a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm, a melt flow rate of not lower than 0 g/10 min but lower than 80 g/10 min determined at 380° C. and 5 kg load, a melting point of 324° C. to 360° C., and an initial pyrolysis temperature of not lower than 400° C.
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公开(公告)号：US10688448B2
公开(公告)日：2020-06-23
申请号：US15100002
申请日：2014-12-01
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Shinichi Chaen , Taku Yamanaka , Kohei Yasuda , Masahiko Yamada , Nobuki Uraoka , Tomohisa Konishi , Kunihiko Inui , Yoshiyuki Shibuya , Makoto Ono
IPC: B01D71/36 , B01D69/02 , H01M8/1039 , B01D69/08 , C08J5/22 , B01J20/26 , B01D39/16 , H01M8/1018
Abstract: The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.
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公开(公告)号：US11084895B2
公开(公告)日：2021-08-10
申请号：US15038307
申请日：2014-12-01
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Taku Yamanaka , Makoto Ono , Kohei Yasuda , Masahiko Yamada , Shinichi Chaen , Yasuhiko Sawada , Takahiro Taira , Hirotoshi Yoshida , Taketo Kato
IPC: C08F214/18 , C08J5/18 , C08F214/26 , B29C55/04
Abstract: The present invention aims to provide a modified polytetrafluoroethylene fine powder capable of providing a stretched body having high strength, a small pore size, and excellent homogeneity. The modified polytetrafluoroethylene fine powder of the present invention has non-melt-processability, has a standard specific gravity of 2.155 or lower, includes 0.015 mol % or more of a polymer unit derived from perfluoro(methyl vinyl ether) in all the monomer units, is obtained by emulsion polymerizing tetrafluoroethylene and at least the perfluoro(methyl vinyl ether) in the presence of a fluorosurfactant having a LogPOW value of 3.4 or lower, and has an extrusion pressure of 20.0 MPa or lower.
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公开(公告)号：US09902787B2
公开(公告)日：2018-02-27
申请号：US15316032
申请日：2015-06-04
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yoshinori Nanba , Dai Fukami , Takuya Yamabe , Taketo Kato , Makoto Ono , Takahiro Taira , Hirotoshi Yoshida , Taku Yamanaka
CPC classification number: C08F14/26 , C08F2/26 , C08F214/262 , C10M147/00 , C10M2213/0626
Abstract: The present invention provides a polytetrafluoroethylene powder having high dispersibility in lubricants. The polytetrafluoroethylene powder includes polytetrafluoroethylene containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene, and has a specific surface area of 32 m2/g or larger.
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