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    • 7. 发明申请
    • SPINNING LOW FLUOROSURFACTANT FLUOROPOLYMER DISPERSIONS
    • 纺丝低荧光聚合物氟聚合物分散体
    • WO2007019156A8
    • 2007-06-14
    • PCT/US2006030029
    • 2006-08-02
    • DU PONTFLOWERS DEVINJONES CLAY WOODWARDCAVANAUGH ROBERT JOHN
    • FLOWERS DEVINJONES CLAY WOODWARDCAVANAUGH ROBERT JOHN
    • D01F6/48C08L29/14D01F6/12
    • D01F6/12C08L1/00C08L27/18C08L29/14C08L71/02C08L2205/03C08L2205/16D01F6/48Y10T428/3154C08L2666/04C08L2666/02
    • A process for dispersion spinning non-melt-processible fluoropolymer fiber in which a mixture of an aqueous dispersion of non-melt-processible polytetrafluoroethylene or modified polytetrafluoroethylene fluoropolymer particles and an aqueous solution of matrix polymer is formed. The non melt-processible particles have an SSG of less than about 2.40. The aqueous dispersion contains an aliphatic alcohol ethoxylate nonionic surfactant having a 20% residuals temperature determined by thermogravimetric analysis (TGA) of less than about 290°C and is essentially free of surfactants containing aromatic groups. The dispersion has a fluorinated surfactant content of less than about 300 ppm. The mixture is extruded into a coagulation bath containing a concentration of ions which coagulate the matrix polymer to form an intermediate fiber structure. The intermediate fiber structure is sintered to decompose the matrix polymer and coalesce. The present invention also provides a spinning composition useful for the dispersion spinning of non-melt-processible fluoropolymer fiber.
    • 分散纺丝不熔融加工的含氟聚合物纤维的方法,其中形成不可熔融加工的聚四氟乙烯或改性聚四氟乙烯含氟聚合物颗粒的水分散体和基质聚合物水溶液的混合物。 不可熔融加工的颗粒具有小于约2.40的SSG。 水性分散体含有脂肪醇乙氧基化物非离子表面活性剂,其具有通过低于约290℃的热重分析(TGA)测定的20%残留温度,并且基本上不含含芳族基团的表面活性剂。 分散体具有小于约300ppm的氟化表面活性剂含量。 将混合物挤压成含有浓缩离子的凝固浴,其凝结基质聚合物以形成中间纤维结构。 中间纤维结构被烧结以分解基体聚合物并聚结。 本发明还提供了一种可用于不可熔融加工的含氟聚合物纤维的分散纺丝的纺丝组合物。
    • 8. 发明申请
    • SPINNING LOW FLUOROSURFACTANT FLUOROPOLYMER DISPERSIONS
    • 纺丝低荧光聚合物含氟聚合物分散体
    • WO2007019156A3
    • 2007-05-03
    • PCT/US2006030029
    • 2006-08-02
    • DU PONTFLOWERS DEVINJONES CLAY WOODWARDCAVANAUGH ROBERT JOHN
    • FLOWERS DEVINJONES CLAY WOODWARDCAVANAUGH ROBERT JOHN
    • D01F6/48C08L29/14D01F6/12
    • D01F6/12C08L1/00C08L27/18C08L29/14C08L71/02C08L2205/03C08L2205/16D01F6/48Y10T428/3154C08L2666/04C08L2666/02
    • A process for dispersion spinning non-melt-processible fluoropolymer fiber in which a mixture of an aqueous dispersion of non-melt-processible polytetrafluoroethylene or modified polytetrafluoroethylene fluoropolymer particles and an aqueous solution of matrix polymer is formed. The non melt-processible particles have an SSG of less than about 2.40. The aqueous dispersion contains an aliphatic alcohol ethoxylate nonionic surfactant having a 20% residuals temperature determined by thermogravimetric analysis (TGA) of less than about 290°C and is essentially free of surfactants containing aromatic groups. The dispersion has a fluorinated surfactant content of less than about 300 ppm. The mixture is extruded into a coagulation bath containing a concentration of ions which coagulate the matrix polymer to form an intermediate fiber structure. The intermediate fiber structure is sintered to decompose the matrix polymer and coalesce. The present invention also provides a spinning composition useful for the dispersion spinning of non-melt-processible fluoropolymer fiber.
    • 一种分散纺丝不可熔融加工的含氟聚合物纤维的方法,其中形成不可熔融加工的聚四氟乙烯或改性聚四氟乙烯含氟聚合物颗粒的水分散体与基体聚合物的水溶液的混合物。 不可熔融加工的颗粒具有小于约2.40的SSG。 含水分散体含有脂肪醇乙氧基化物非离子表面活性剂,其具有通过热重分析(TGA)测定的低于约290℃的20%残余温度,并且基本不含含芳族基团的表面活性剂。 该分散体具有小于约300ppm的氟化表面活性剂含量。 将混合物挤出到含有浓缩离子的凝固浴中,凝结基体聚合物以形成中间纤维结构。 中间纤维结构被烧结以分解基质聚合物并聚结。 本发明还提供可用于不可熔融加工的含氟聚合物纤维的分散纺丝的纺丝组合物。