公开(公告)号：EP1739105A4

公开(公告)日：2009-08-19

申请号：EP05728751

申请日：2005-04-04

Applicant: DAIKIN IND LTD

Inventor： NANBA YOSHINORI ,  SAWADA YASUHIKO ,  KASAI SHUNJI ,  TAGASHIRA SHUJI ,  ONO MAKOTO ,  TAIRA TAKAHIRO ,  YOSHIMOTO HIROYUKI

IPC: C08F214/26 ,  C08F2/00 ,  C08F2/38 ,  C08F14/26 ,  H05K1/02 ,  H05K1/03

CPC classification number: C08F214/26 ,  C08F14/26 ,  C08F214/262 ,  C08F259/08 ,  H05K1/024 ,  H05K1/0373 ,  H05K2201/015 ,  H05K2201/0212 ,  Y10T428/3154 ,  C08F2/00

Abstract: The present invention provides a polytetrafluoroethylene powder having moldability/processability as well as electrical characteristics in microwave bands. The present invention is a modified polytetrafluoroethylene powder which has (1) a dielectric loss tangent at 12 GHz of not higher than 2.0 x 10 -4 and (2) a cylinder extrusion pressure of not higher than 45 MPa at a reduction ratio of 1600.

公开(公告)号：EP3156449A4

公开(公告)日：2017-09-06

申请号：EP15802859

申请日：2015-06-04

Applicant: DAIKIN IND LTD

Inventor： NANBA YOSHINORI ,  FUKAMI DAI ,  YAMABE TAKUYA ,  KATO TAKETO ,  ONO MAKOTO ,  TAIRA TAKAHIRO ,  YOSHIDA HIROTOSHI ,  YAMANAKA TAKU

IPC: C08L27/18 ,  C08F2/26 ,  C08F14/26 ,  C08K5/00 ,  C08K5/101

CPC classification number: C08L27/18 ,  C08F2/26 ,  C08F14/26 ,  C08K5/00 ,  C08K5/101 ,  C08L2201/54

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.

Abstract translation: 本发明提供一种聚四氟乙烯水分散体，其含有高分子量，非常小的聚四氟乙烯颗粒并具有优异的分散稳定性。 本发明涉及含有四氟乙烯单元或四氟乙烯单元和基于可与四氟乙烯共聚的改性单体的改性单体单元的聚四氟乙烯颗粒的水分散体。 聚四氟乙烯颗粒具有不小于0.1纳米的体积平均粒径，但小于20纳米，不低于0克/ 10分钟的熔体流动速率，但低于80克/在380℃和5kg测定10分钟 负荷，熔点324〜360℃，初期热分解温度为400℃以上。

公开(公告)号：EP3053937A4

公开(公告)日：2017-05-17

申请号：EP14865651

申请日：2014-12-01

Applicant: DAIKIN IND LTD

Inventor： YAMANAKA TAKU ,  ONO MAKOTO ,  YASUDA KOHEI ,  YAMADA MASAHIKO ,  CHAEN SHINICHI ,  SAWADA YASUHIKO ,  TAIRA TAKAHIRO ,  YOSHIDA HIROTOSHI ,  KATO TAKETO

IPC: C08F214/26 ,  B29C55/04 ,  C08F216/14 ,  C08J9/00

CPC classification number: C08F214/262 ,  B29C55/04 ,  C08F2500/11 ,  C08F2500/24 ,  C08F2500/26 ,  C08F2800/10 ,  C08J5/18 ,  C08J2327/18

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.

Abstract translation: 本发明的目的在于提供一种改性聚四氟乙烯细粉，其能够提供具有高强度，小孔径和优异均匀性的拉伸体。 本发明的改性聚四氟乙烯细粉具有非熔融加工性，标准比重为2.155以下，在全部单体单元中含有来自全氟（甲基乙烯基醚）的聚合单元0.015摩尔％以上， 是通过在LogPOW值为3.4以下的含氟表面活性剂的存在下使四氟乙烯和至少全氟（甲基乙烯基醚）乳液聚合而获得的，并且具有20.0MPa以下的挤出压力。

公开(公告)号：EP3153532A4

公开(公告)日：2017-12-20

申请号：EP15803131

申请日：2015-06-04

Applicant: DAIKIN IND LTD

Inventor： NANBA YOSHINORI ,  FUKAMI DAI ,  YAMABE TAKUYA ,  KATO TAKETO ,  ONO MAKOTO ,  TAIRA TAKAHIRO ,  YOSHIDA HIROTOSHI ,  YAMANAKA TAKU

IPC: C08F14/26 ,  C08F2/26 ,  C10M147/00

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 m 2 /g or larger.

公开(公告)号：EP2749576A4

公开(公告)日：2015-04-15

申请号：EP12825282

申请日：2012-08-27

Applicant: DAIKIN IND LTD

Inventor： TAIRA TAKAHIRO ,  YAMANAKA TAKU ,  NANBA YOSHINORI ,  TANAKA ATSUKO ,  ONO MAKOTO ,  TSUDA NOBUHIKO ,  KATO TAKETO

IPC: C08F2/24 ,  C08F14/26

CPC classification number: C08L27/18 ,  C08F2/22 ,  C08F2/24 ,  C08F2/26 ,  C08F2/30 ,  C08F114/26 ,  C08F214/26 ,  C08F214/262

公开(公告)号：EP3153527A4

公开(公告)日：2017-11-29

申请号：EP15803136

申请日：2015-06-04

Applicant: DAIKIN IND LTD

Inventor： NANBA YOSHINORI ,  FUKAMI DAI ,  YAMABE TAKUYA ,  KATO TAKETO ,  ONO MAKOTO ,  TAIRA TAKAHIRO ,  YOSHIDA HIROTOSHI ,  YAMANAKA TAKU

IPC: C08F2/24 ,  C08F14/00 ,  C08F14/26 ,  C08F214/26

CPC classification number: C08F114/26 ,  C08F2/24 ,  C08F14/00 ,  C08F14/26 ,  C08L27/18 ,  C08L2201/50 ,  C08F2/26

Abstract: The present invention provides a method for producing a fluoropolymer aqueous dispersion having a significantly small particle size and excellent dispersion stability. The present invention relates to a method for producing an aqueous dispersion containing at least one fluoropolymer selected from the group consisting of polytetrafluoroethylene and melt-fabricable fluororesins excluding polytetrafluoroethylene. The method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorosurfactant and a polymerization initiator. The fluorosurfactant has a concentration in the aqueous medium of not lower than 0.8 times the critical micelle concentration of the fluorosurfactant.

公开(公告)号：EP1816148A4

公开(公告)日：2009-08-05

申请号：EP05806697

申请日：2005-11-16

Applicant: DAIKIN IND LTD

Inventor： TAIRA TAKAHIRO ,  YOSHIMOTO HIROYUKI ,  KATO TAKETO ,  SAWADA YASUHIKO

IPC: C08F259/08 ,  C08F214/26

CPC classification number: C08F214/262 ,  C08F214/26 ,  C08F259/08 ,  C08L51/003 ,  Y10T428/1352 ,  C08L2666/02

Abstract: This invention provides a modified polytetrafluoroethylene fine powder which can lower extrusion pressure. The modified polytetrafluoroethylene fine powder is characterized in that the cylindrical extrusion pressure at a reduction ratio of 1600 is not more than 50 MPa and the haze value for a molded product (a) for measurement is not more than 60.