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    • 3. 发明授权
    • Coagulation process of PTFE fine powders
    • 聚四氟乙烯细粉的凝结过程
    • US06780966B2
    • 2004-08-24
    • US10202851
    • 2002-07-26
    • Hua WuStefano Ferrero
    • Hua WuStefano Ferrero
    • C08J300
    • C08J3/16C08F6/22C08J2327/18C08L27/18
    • A continuous coagulation process of PTFE or modified PTFE fine powders, comprising: a1) dilution in a lift of a PTFE latex up to a concentration from 5 to 25% w/w of PTFE, and optional filtration of the obtained diluted latex, b1) latex pressurization in the lift by an inert gas, preferably air, until a relative pressure, related to the atmospheric pressure, in the range 3-40 kg/cm2 (0.3-4 MPa), c1) addition of an acid electrolyte solution, d1) latex flowing from the mixer through a capillary tube under turbulent flow conditions, e1) granulation (coagulation) of the gel obtained in step d1) by mechanical stirring with a specific power from 1.5 to 10 kW/m3, maintaining the stirring until fine powder flotation, f1) separation of the underlying water from the fine powder.
    • PTFE或改性PTFE细粉末的连续凝固方法,包括:a1)在PTFE胶乳的提升中稀释至5至25%w / w的PTFE的浓度,并任选地过滤所获得的稀释胶乳,b1) 通过惰性气体(优选空气)在升降机中胶乳加压,直到与大气压相关的相对压力在3-40kg / cm 2(0.3-4MPa)的范围内,c1)加入酸性电解质 溶液,d1)在湍流条件下从混合器流过毛细管的胶乳,e1)通过以1.5至10kW / m 3的比功率的机械搅拌机械搅拌,在步骤d1)中获得的凝胶的造粒(凝结) 保持搅拌直到细粉末浮选,f1)从细粉中分离下面的水。
    • 4. 发明申请
    • Polymerization Process
    • 聚合过程
    • US20090108501A1
    • 2009-04-30
    • US12296216
    • 2007-04-06
    • Vincenzo ArcellaValeri KapeliouchkoStefano FerreroAniello Gargiulo
    • Vincenzo ArcellaValeri KapeliouchkoStefano FerreroAniello Gargiulo
    • C08J5/00C08F2/00
    • C08F2/01B01F7/00975B01F7/166B01F7/1665C08F14/18C08F14/26Y10S526/918C08F2/02
    • A fluoropolymer [polymer (F)], a polymerisation process for its manufacture, and a moulding process using such fluoropolymer [polymer (F)].The polymerisation process comprises polymerising at least one fluorinated monomer in a polymerization medium, in which the polymerization medium is mixed by means of a stirring system comprising at least two counter-rotating impellers. Surprisingly and advantageously, the polymerization occurs without fouling or deposit formation on the reactor walls, and moreover, occurs with improved homogeneity, without composition, pressure or temperature gradients, thus enabling obtaining homogeneous polymer composition with no risk of local overheating.A polymer (F) obtained from such process has improved morphology (percentage of organized structures, i.e. of particles of regular shape) and, hence, has good free flowing properties which make it suitable for being processed by compression moulding with no need of intermediate milling or grinding process or other size reduction process.
    • 含氟聚合物[聚合物(F)],其制造的聚合方法和使用这种含氟聚合物[聚合物(F)]的成型方法。 聚合方法包括在聚合介质中聚合至少一种氟化单体,其中聚合介质通过包括至少两个反向旋转叶轮的搅拌系统混合。 令人惊奇和有利地,聚合反应发生在反应器壁上没有结垢或沉积物形成,此外,在没有组成,压力或温度梯度的情况下,具有改进的均匀性发生,从而能够获得均匀的聚合物组合物,而没有局部过热的风险。 从这种方法获得的聚合物(F)具有改善的形态(有组织的结构的百分比,即规则形状的颗粒的百分比),因此具有良好的自由流动性,使其适于通过压缩加工而不需要中间研磨 或研磨过程或其他尺寸缩小过程。
    • 6. 发明授权
    • Polymerisation process
    • 聚合过程
    • US07915356B2
    • 2011-03-29
    • US12296216
    • 2007-04-06
    • Vincenzo ArcellaValeri KapeliouchkoStefano FerreroAniello Gargiulo
    • Vincenzo ArcellaValeri KapeliouchkoStefano FerreroAniello Gargiulo
    • C08F2/18C08F2/00C08J5/00B01J19/18
    • C08F2/01B01F7/00975B01F7/166B01F7/1665C08F14/18C08F14/26Y10S526/918C08F2/02
    • A fluoropolymer [polymer (F)], a polymerisation process for its manufacture, and a molding process using such fluoropolymer [polymer (F)].The polymerisation process comprises polymerising at least one fluorinated monomer in a polymerization medium, in which the polymerization medium is mixed by means of a stirring system comprising at least two counter-rotating impellers. Surprisingly and advantageously, the polymerization occurs without fouling or deposit formation on the reactor walls, and moreover, occurs with improved homogeneity, without composition, pressure or temperature gradients, thus enabling obtaining homogeneous polymer composition with no risk of local overheating.A polymer (F) obtained from such process has improved morphology (percentage of organized structures, i.e. of particles of regular shape) and, hence, has good free flowing properties which make it suitable for being processed by compression molding with no need of intermediate milling or grinding process or other size reduction process.
    • 含氟聚合物[聚合物(F)],其制造的聚合方法和使用这种含氟聚合物[聚合物(F)]的成型方法。 聚合方法包括在聚合介质中聚合至少一种氟化单体,其中聚合介质通过包括至少两个反向旋转叶轮的搅拌系统混合。 令人惊奇和有利地,聚合反应发生在反应器壁上没有结垢或沉积物形成,此外,在没有组成,压力或温度梯度的情况下,具有改进的均匀性发生,从而能够获得均匀的聚合物组合物,而没有局部过热的风险。 从这种方法获得的聚合物(F)具有改善的形态(有组织的结构的百分比,即规则形状的颗粒的百分比),因此具有良好的自由流动性,使其适于通过压缩加工而不需要中间研磨 或研磨过程或其他尺寸缩小过程。