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1. 发明授权

EP2927248B1 PRODUCTION METHOD FOR POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION 有权
公开(公告)号：EP2927248B1
公开(公告)日：2018-06-13
申请号：EP13858460.2
申请日：2013-12-02
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori
IPC分类号： C08F14/26 , C08F2/26 , C08F2/44 , C08F2/00 , C08F2/10 , C08L27/18
CPC分类号： C08F2/10 , C08F2/001 , C08F2/26 , C08F2/44 , C08F14/26 , C08L27/18 , C08L2201/54
摘要： The present invention aims to provide a method of producing a PTFE aqueous dispersion which contains PTFE particles having a small particle size and which is excellent in dispersion stability by multistage polymerization without using a long-chain fluorosurfactant. The method includes the steps of: (1) polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorosurfactant and a polymerization initiator to provide an aqueous dispersion containing particles of at least one fluoropolymer selected from the group consisting of PTFE and melt-processible fluororesins excluding polytetrafluoroethylene; and (2) polymerizing TFE alone or TFE and a modifying monomer in an aqueous medium in the presence of the fluoropolymer particles and a polymerization initiator to provide an aqueous dispersion containing PTFE particles. The fluoropolymer particles have an equivalent weight (EW) of 6,000 or more and a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm.

2. 发明公开

EP2918613A1 PRODUCTION METHOD FOR POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION 有权
标题翻译：聚四氟乙烯水分散体的生产方法
公开(公告)号：EP2918613A1
公开(公告)日：2015-09-16
申请号：EP13859432.0
申请日：2013-12-02
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori
IPC分类号： C08F2/26 , C08F14/18
摘要： The present invention aims to provide a method of producing a fluoropolymer aqueous dispersion having a significantly small particle size and excellent dispersion stability without using a long-chain fluorosurfactant. The present invention relates to a method of producing an aqueous dispersion containing at least one fluoropolymer selected from the group consisting of polytetrafluoroethylene and melt-processible fluororesins excluding polytetrafluoroethylene. The method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorosurfactant having a Log POW value of not higher than 3.4 and a polymerization initiator. The amount of the fluorosurfactant corresponds to 4600 to 500000 ppm of the aqueous medium.
摘要翻译：本发明的目的在于提供一种不使用长链含氟表面活性剂而得到的粒径非常小且分散稳定性优异的含氟聚合物水分散体的制造方法。本发明涉及生产含有至少一种选自聚四氟乙烯和不包括聚四氟乙烯的可熔融加工的氟树脂的含氟聚合物的水分散体的方法。该方法包括在Log Pow值不高于3.4的含氟表面活性剂和聚合引发剂的存在下，在含水介质中聚合含氟单体。含氟表面活性剂的量相当于含水介质的4600至500000ppm。

3. 发明授权

EP2918613B1 PRODUCTION METHOD FOR POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION 有权
公开(公告)号：EP2918613B1
公开(公告)日：2020-06-03
申请号：EP13859432.0
申请日：2013-12-02
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori
IPC分类号： C08F2/26 , C08F14/18 , C08F2/10 , C08L27/18

4. 发明授权

EP2927247B1 POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION, AND POLYTETRAFLUOROETHYLENE FINE POWDER 有权
标题翻译：聚四氟乙烯水分散体和聚四氟乙烯细粉
公开(公告)号：EP2927247B1
公开(公告)日：2017-07-19
申请号：EP13858148.3
申请日：2013-12-02
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori
IPC分类号： C08F14/26
CPC分类号： C08K5/101 , C08F2/44 , C08F14/26 , C08F114/26

5. 发明公开

EP3153527A1 METHOD FOR PRODUCING FLUOROPOLYMER AQUEOUS DISPERSION LIQUID 审中-公开
标题翻译： VERFAHREN ZUR HERSTELLUNG EINERWÄSSRIGENFLUORPOLYMERDISPERSIONSFLÜSSIGKEIT
公开(公告)号：EP3153527A1
公开(公告)日：2017-04-12
申请号：EP15803136.9
申请日：2015-06-04
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori , FUKAMI Dai , YAMABE Takuya , KATO Taketo , ONO Makoto , TAIRA Takahiro , YOSHIDA Hirotoshi , YAMANAKA Taku
IPC分类号： C08F2/24 , C08F14/00
CPC分类号： C08F114/26 , C08F2/24 , C08F14/00 , C08F14/26 , C08L27/18 , C08L2201/50 , C08F2/26
摘要： 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.
摘要翻译：本发明提供一种具有显着小的粒度和优异的分散稳定性的含氟聚合物水性分散体的制造方法。本发明涉及含有至少一种选自聚四氟乙烯和聚四氟乙烯除外的可熔融制造的氟树脂的含氟聚合物的水性分散体的制造方法。该方法包括在含氟表面活性剂和聚合引发剂的存在下在含水介质中聚合含氟单体。含氟表面活性剂在含水介质中的浓度不低于含氟表面活性剂的临界胶束浓度的0.8倍。

6. 发明公开

EP3156449A1 POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION 审中-公开
标题翻译： WÄSSRIGEPOLYTETRAUORETHYLENDISPERSION
公开(公告)号：EP3156449A1
公开(公告)日：2017-04-19
申请号：EP15802859.7
申请日：2015-06-04
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori , FUKAMI Dai , YAMABE Takuya , KATO Taketo , ONO Makoto , TAIRA Takahiro , YOSHIDA Hirotoshi , YAMANAKA Taku
IPC分类号： C08L27/18 , C08K5/00
CPC分类号： C08L27/18 , C08F2/26 , C08F14/26 , C08K5/00 , C08K5/101 , C08L2201/54
摘要： 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.
摘要翻译：本发明提供含有高分子量，显着小的聚四氟乙烯颗粒并且具有优异的分散稳定性的聚四氟乙烯水性分散体。本发明涉及含有单独的四氟乙烯单元或四氟乙烯单元的聚四氟乙烯颗粒和基于可与四氟乙烯共聚的改性单体的改性单体单元的水分散体。聚四氟乙烯颗粒的体积平均粒径不小于0.1nm但小于20nm，在380℃和5kg下测定的熔体流动速率不低于0g / 10min但低于80g / 10min 负载，熔点为324℃至360℃，初始热解温度不低于400℃。

7. 发明公开

EP2927248A1 PRODUCTION METHOD FOR POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION 有权
标题翻译：用于生产聚四氟乙烯水性
公开(公告)号：EP2927248A1
公开(公告)日：2015-10-07
申请号：EP13858460.2
申请日：2013-12-02
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori
IPC分类号： C08F14/26 , C08F2/26 , C08F2/44
CPC分类号： C08F2/10 , C08F2/001 , C08F2/26 , C08F2/44 , C08F14/26 , C08L27/18 , C08L2201/54
摘要： The present invention aims to provide a method of producing a PTFE aqueous dispersion which contains PTFE particles having a small particle size and which is excellent in dispersion stability by multistage polymerization without using a long-chain fluorosurfactant. The method includes the steps of: (1) polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorosurfactant and a polymerization initiator to provide an aqueous dispersion containing particles of at least one fluoropolymer selected from the group consisting of PTFE and melt-processible fluororesins excluding polytetrafluoroethylene; and (2) polymerizing TFE alone or TFE and a modifying monomer in an aqueous medium in the presence of the fluoropolymer particles and a polymerization initiator to provide an aqueous dispersion containing PTFE particles. The fluoropolymer particles have an equivalent weight (EW) of 6,000 or more and a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm.

8. 发明公开

EP2927247A1 POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION, AND POLYTETRAFLUOROETHYLENE FINE POWDER 有权
标题翻译：聚四氟乙烯水性和聚四氟乙烯细粉
公开(公告)号：EP2927247A1
公开(公告)日：2015-10-07
申请号：EP13858148.3
申请日：2013-12-02
申请人： Daikin Industries, Ltd.
发明人： NANBA Yoshinori
IPC分类号： C08F14/26
CPC分类号： C08K5/101 , C08F2/44 , C08F14/26 , C08F114/26
摘要： The present invention aims to provide a polytetrafluoroethylene aqueous dispersion which contains significantly minute polytetrafluoroethylene particles and which is excellent in dispersion stability, and a significantly minute polytetrafluoroethylene fine powder. The polytetrafluoroethylene aqueous dispersion contains polytetrafluoroethylene particles including a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit derived from a modifying monomer copolymerizable with the tetrafluoroethylene unit. The polytetrafluoroethylene particles have a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm.

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