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    • 3. 发明授权
    • Modified polytetrafluoroethylene fine powder and process for preparing
the same
    • 改性聚四氟乙烯细粉及其制备方法
    • US5284708A
    • 1994-02-08
    • US957895
    • 1992-10-08
    • Tetsuo ShimizuKazutaka HosokawaMasuo KokumaiMakoto Ono
    • Tetsuo ShimizuKazutaka HosokawaMasuo KokumaiMakoto Ono
    • C08F214/26B32B5/16C08F116/12
    • C08F214/262Y10T428/2982
    • Modified PTFE fine powder which comprises colloidal particles of a copolymer comprising repeating units derived from tetrafluoroethylene and 0.02 to 0.3 % by weight, preferably 0.03 to 0.2% by weight of repeating units derived from at least one fluoroalkyl vinyl ether selected from compounds of the formula:X(CF.sub.2).sub.n OCF.dbd.CF.sub.2 (I)wherein X is a hydrogen, fluorine or chlorine atom and n is an integer of 1 to 6, andC.sub.3 F.sub.7 (OCF.sub.2 CF.sub.2 CF.sub.2).sub.m [OCF(CF.sub.3)CF.sub.2 ].sub.1 OCF.dbd.CF.sub.2 (II)wherein m and 1 are each an integer of 0 to 4 provided that at least one of them is not zero, which has a number average particle size of 0.05 to 0.6 .mu.m, wherein the copolymer has a specific melt viscosity of from 6.times.10.sup.10 to 30.times.10.sup.10 poise, preferably from 8.0.times.10.sup.10 to 25.times.10.sup.10 poise at 380.degree. C. and a standard specific gravity (SSG, hereinafter defined) of from 2.135 to 2.175, preferably from 2.140 to 2.160 and a paste extruded article of the polymer has a green elongation of at least 400% is provided.
    • 改性PTFE细粉末,其包含含有衍生自四氟乙烯的重复单元和0.02至0.3重量%,优选0.03至0.2重量%的衍生自至少一种氟代烷基乙烯基醚的重复单元的共聚物的胶体颗粒,所述氟代烷基乙烯基醚选自下式化合物: X(CF 2)n OCF = CF 2(I)其中X为氢,氟或氯原子,n为1至6的整数,C 3 F 7(OCF 2 CF 2 CF 2)m(OCF(CF 3)CF 2) m和1各自为0〜4的整数,条件是它们中的至少一个不为零,其数均粒径为0.05〜0.6(my)m,其中,共聚物的比熔融粘度为6 * 在380℃下优选为1010至30 * 1010泊,优选为8.0 * 1010至25 * 1010泊,标准比重(SSG,以下定义)为2.135至2.175,优选为2.140至2.160, 提供聚合物具有至少400%的绿色伸长率。
    • 5. 发明授权
    • Modified polytetrafluoroethylene fine powder and method for the production of the same
    • 改性聚四氟乙烯细粉及其制备方法
    • US06531557B1
    • 2003-03-11
    • US09242272
    • 1999-03-12
    • Kazutaka HosokawaYoshinori NanbaTakahisa AoyamaTetsuo Shimizu
    • Kazutaka HosokawaYoshinori NanbaTakahisa AoyamaTetsuo Shimizu
    • C08F21426
    • C08F214/262
    • A modified polytetrafluoroethylene fine powder containing agglomerates of colloidal particles with an average particle size of from 0.05 to 0.5 &mgr;m which comprise a copolymer of tetrafluoroethylene and an olefin-monomer represented by X(CF2)nOCF═CF2 in which X is a hydrogen atom, a fluorine atom or a chlorine atom, and n is an integer of 1 to 6, and/or C3F7(OCF2CF2CF2)m[OCF(CF3)CF2]pOCF═CF2 in which m and p are independently an integer of 0 to 4, provided that the sum of m and p is not 0 (zero), a content of the olefin monomer being from 0.02 to 0.3 wt. %, wherein the copolymer has a molecular weight distribution Mw/Mn of from 1.5 to 4.5 and a standard specific gravity of from 2.135 to 2.175. This modified polytetrafluoroethylene has good paste extrudability, and provides molded articles having good mechanical properties, in particular, pressure resistance.
    • 一种改性聚四氟乙烯细粉末,其含有平均粒径为0.05〜0.5μm的胶体粒子的附聚物,其包含由X(CF 2)n OCF = CF 2(其中X为氢原子)表示的四氟乙烯与烯烃单体的共聚物, 氟原子或氯原子,n为1〜6的整数,和/或C 3 F 7(OCF 2 CF 2 CF 2)m [OCF(CF 3)CF 2] p OCF = CF 2,其中m和p分别为0〜4的整数, m和p的和不为0(零),烯烃单体的含量为0.02-0.3重量%。 %,其中共聚物的分子量分布Mw / Mn为1.5〜4.5,标准比重为2.135〜2.175。 该改性聚四氟乙烯具有良好的糊料挤出性,并提供具有良好机械性能,特别是耐压性的模制品。
    • 7. 发明授权
    • Modified polytetrafluoroethylene fine powder and process for preparing
the same
    • 改性聚四氟乙烯细粉及其制备方法
    • US5176958A
    • 1993-01-05
    • US715029
    • 1991-06-13
    • Tetsuo ShimizuKazutaka HosokawaMasuo KokumaiMakoto Ono
    • Tetsuo ShimizuKazutaka HosokawaMasuo KokumaiMakoto Ono
    • C08F214/26
    • C08F214/262Y10T428/2982
    • Modified PTFE fine powder which comprises colloidal particles of a copolymer comprising repeating units derived from tetrafluoroethylene and 0.02 to 0.3% by weight, preferably 0.03 to 0.2% by weight of repeating units derived from at least one fluoroalkyl vinyl ether selected from compounds of the formula:X(CF.sub.2).sub.n OCF.dbd.CF.sub.2 (I)wherein X is a hydrogen, fluorine or chlorine atom and n is an integer of 1 to 6, andC.sub.3 F.sub.7 (OCF.sub.2 CF.sub.2 CF.sub.2).sub.m [OCF(CF.sub.3)CF.sub.2 ].sub.l OCF.dbd.CF.sub.2 (II)wherein m and l are each an integer of 0 to 4 provided that at least one of them is not zero, which has a number average particle size of 0.05 to 0.6 .mu.m, wherein the copolymer has a specific melt viscosity of from 6.times.10.sup.10 to 30.times.10.sup.10 poise, preferably from 8.0.times.10.sup.10 to 25.times.10.sup.10 poise at 380.degree. C. and a standard specific gravity (SSG, hereinafter defined) of from 2.135 to 2.175, preferably from 2.140 to 2.160 and a paste extruded article of the polymer has a green elongation of at least 400% is provided.
    • 改性PTFE细粉末,其包含含有衍生自四氟乙烯的重复单元和0.02至0.3重量%,优选0.03至0.2重量%的衍生自至少一种氟代烷基乙烯基醚的重复单元的共聚物的胶体颗粒,所述氟代烷基乙烯基醚选自下式化合物: X(CF 2)n OCF = CF 2(I)其中X为氢,氟或氯原子,n为1〜6的整数,C 3 F 7(OCF 2 CF 2 CF 2)m [OCF(CF 3)CF 2] m和l各自为0〜4的整数,条件是它们中的至少一个不为零,其数均粒径为0.05至0.6μm,其中共聚物的比熔融粘度为6×10 10至30×10 10泊 ,优选在380℃下为8.0×10 10至25×10 10泊,标准比重(SSG,以下定义)为2.135至2.175,优选为2.140至2.160,并且聚合物的糊状挤出制品具有至少的绿色伸长率 提供400%。
    • 8. 发明授权
    • Modified polytetrafluoroethylene fine powder and production of the same
    • 改性聚四氟乙烯细粉与生产相同
    • US4840998A
    • 1989-06-20
    • US89766
    • 1987-08-27
    • Tetsuo ShimizuKazutaka Hosokawa
    • Tetsuo ShimizuKazutaka Hosokawa
    • C08J3/12C08F2/00C08F2/18C08F214/26
    • C08F214/262Y10S525/902
    • Modified PTFE fine powder which comprises primary particles having an average particle size of 0.1 to 0.6 .mu.m and contains 0.01 to 0.15% by weight, based on the total weight of the particles, of at least one olefinically unsaturated compound selected from the group consisting of a fluoroalkyl vinyl ether of the formula:X(CF.sub.2).sub.n OCF.dbd.CF.sub.2 (I)wherein X is a hydrogen atom, a fluorine atom or a chlorine atom and n is an integer of 1 to 6, and a fluoroalkyl vinyl ether of the formula:C.sub.3 F.sub.7 (OCF.sub.2 CF.sub.2 CF.sub.2).sub.m [OCF(CF.sub.3)CF.sub.2 ].sub.l OCF.dbd.CF.sub.2 (II)wherein m is an integer of 0 to 2 and l is an integer of 0 to 2 mainly in core parts of the particles and 0.04 to 0.25% by weight, based on the total weight of the particles, of chlorotrifluoroethylene in shell parts, which has good paste extrudability and heat stability.
    • 改性PTFE细粉末,其包含平均粒度为0.1〜0.6μm的一次粒子,以所述粒子的总重量计含有0.01〜0.15重量%的至少一种选自以下的烯属不饱和化合物: 具有下式的氟烷基乙烯基醚:X(CF 2)n OCF = CF 2(I)其中X是氢原子,氟原子或氯原子,n是1至6的整数,并且式 :C 3 F 7(OCF 2 CF 2 CF 2)m [OCF(CF 3)CF 2] l OCF = CF 2(II)其中m为0〜2的整数,l为0〜2的整数,主要为颗粒的核心部分,0.04〜0.25% 重量,基于颗粒的总重量,三氯氟乙烯在壳部分中,其具有良好的浆料挤出性和热稳定性。