公开(公告)号：US20030088055A1

公开(公告)日：2003-05-08

申请号：US10202852

申请日：2002-07-26

申请人： Ausimont S.p.A.

发明人： Valery Kapeliouchko ,  Hua Wu ,  Giovanna Palamone

IPC分类号： C08F214/18

CPC分类号： C08J3/16 ,  C08J2327/18

摘要： A process for obtaining non thermoprocessable fine powders of homopolymer or modified PTFE, comprising the following steps: A) obtaining of the polymer latex under the gel form; B) washing of the polymer gel with acid aqueous solutions or neutral aqueous solutions; C) granulation of the gel washed by mechanical stirring, at a specific power in the range 1.5-10 kW/m3, until flotation of the PTFE fine powder, and separation of the floated fine powder; D) drying in an aerated oven of the floated fine powder at a drying temperature in the range 90null C.-160null C.

摘要翻译： 获得均聚物或改性PTFE的非热可加工细粉末的方法，包括以下步骤：A）以凝胶形式获得聚合物胶乳; B）用酸性水溶液或中性水溶液洗涤聚合物凝胶; C）通过机械搅拌，以1.5-10kW / m 3的比功率洗涤凝胶，直到PTFE细粉末浮选，并漂浮的细粉分离; D）在漂浮的细粉末的充气烘箱中在90℃-160℃的干燥温度下干燥。

公开(公告)号：US20010020063A1

公开(公告)日：2001-09-06

申请号：US09789728

申请日：2001-02-22

申请人： Ausimont S.p.A.

发明人： Valery Kapeliouchko ,  Enrico Marchese

IPC分类号： C08K003/00 ,  C08L027/12

CPC分类号： C08F259/08 ,  C08F2/26 ,  C08F14/26 ,  C08F2/16

摘要： Process for the preparation of a dispersion based on homopolymers/copolymers of tetrafluoroethylene (TFE), said dispersion having a bimodal or multimodal distribution of the particle diameters, wherein the fraction of small particles is in the range 1.5-359 by weight calculated on the dry product; the ratio between the average diameter of the small particles with respect to the average diameter of the dispersion obtained from the polymerization being in the range 0.02-0.6; said process comprising the following essential steps: (a) preparation of an aqueous microemulsion comprising fluorinated surfactants and (per)fluoropolyether oils (PFPE); (b) feeding of the microemulsion into the polymerization reactor; (c) feeding of at least one fluorinated surfactant.

摘要翻译： 用于制备基于四氟乙烯（TFE）的均聚物/共聚物的分散体的方法，所述分散体具有粒径的双峰或多峰分布，其中小颗粒的分数在干燥条件下计算为1.5-359重量％ 产品; 小颗粒的平均直径相对于由聚合得到的分散体的平均直径的比在0.02-0.6的范围内; 所述方法包括以下必要步骤：（a）制备包含氟化表面活性剂和（全）氟聚醚油（PFPE）的水性微乳液; （b）将微乳液进料到聚合反应器中; （c）进料至少一种氟化表面活性剂。

公开(公告)号：US20020052437A1

公开(公告)日：2002-05-02

申请号：US09931756

申请日：2001-08-20

申请人： Ausimont S.p.A.

发明人： Valery Kapeliouchko ,  Enrico Marchese ,  Tatiana Temtchenko

IPC分类号： C08K005/09

CPC分类号： C08J3/03 ,  C08J2327/18 ,  C08K5/03 ,  C08K5/04 ,  C08K5/098 ,  H01B3/445 ,  C08L27/18

摘要： A formulation based on the PTFE, homopolymer or modified, comprising: 1) latex of said PTFE having a particle diameter between 5 and 100 nm, comprising an anionic fluorinated surfactant in an amount in the range 2-25% by weight based on the PTFE; 2) non ionic fluorinated surfactant added to the PTFE latex in amount in the range 18-60% by weight based on the PTFE.

摘要翻译： 基于PTFE，均聚物或改性的制剂，其包含：1）具有5至100nm粒径的所述PTFE的胶乳，其包含基于PTFE的2-25重量％范围内的量的阴离子氟化表面活性剂 ; 2）加入到PTFE胶乳中的非离子氟化表面活性剂的量为基于PTFE的18-60重量％。

公开(公告)号：US20020035221A1

公开(公告)日：2002-03-21

申请号：US09907821

申请日：2001-07-19

申请人： Ausimont S.p.A.

发明人： Valery Kapeliouchko ,  Enrico Marchese

IPC分类号： C08F002/00 ,  C08F114/18

CPC分类号： C08F259/08

摘要： Fine powders of modified PTFE having a nullcore-shellnull structure; the fine powder being formed by: a nullcorenull of tetrafluoroethylene (TFE) modified by one or more monomers selected from: a) dioxoles; b) one or more perfluorinated monomers which cyclize during the polymerization; a nullshellnull of TFE modified by perfluoropropene (PFP); the amount, referred to the total corenullshell particle, of comonomers 1) in the nullcorenull being in the range 0.01-0.06% by weight; the amount, referred to the total corenullshell particle, of perfluoropropene 2) in the nullshellnull being in the range 0.002-0.06% by weight; the thermal instability index (TII) of the fine powder being equal to or lower than 5, determined according to ASTM D4895.

摘要翻译： 具有“核 - 壳”结构的改性PTFE的细粉末; 所述细粉末由以下物质形成的四氟乙烯（TFE）的“芯”：由一种或多种选自以下的单体改性的：a）二氧杂环戊烯; b）在聚合期间环化的一种或多种全氟化单体; 由全氟丙烯（PFP）改性的TFE的“壳”; “芯”中的共聚单体1）的总核心+壳粒子的量在0.01-0.06重量％的范围内; “壳”中的全氟丙烯2的总核+壳粒子的量在0.002-0.06重量％范围内; 根据ASTM D4895测定，细粉末的热不稳定性指数（TII）等于或小于5。

公开(公告)号：US20020193495A1

公开(公告)日：2002-12-19

申请号：US10097622

申请日：2002-03-15

申请人： Ausimont S.p.A.

发明人： Giovanna Palamone ,  Valery Kapeliouchko

IPC分类号： C08K003/20

CPC分类号： C08L51/003 ,  C08F259/08 ,  C08L55/02 ,  Y10S525/902 ,  C08L2666/02

摘要： Compositions containing core-shell particles having a core polytetrafluoroethylene-based polymers (PTFE) and shell styrene-based polymers (PS), wherein the particles contain an amount by weight of PTFE from 3 to 50%, preferably from 5 to 30% by weight, wherein the core PTFE particles have an average diameter from 5 to 100 nm, preferably from 10 to 70 nm, the core-shell particles having an average diameter from 10 to 170 nm, preferably from 20 to 100 nm.

摘要翻译： 含有核聚四氟乙烯基聚合物（PTFE）和壳苯乙烯基聚合物（PS）的核 - 壳颗粒的组合物，其中颗粒含有3至50重量％，优选5至30重量％ 其中，核心PTFE粒子的平均直径为5〜100nm，优选为10〜70nm，核 - 壳粒子的平均直径为10〜170nm，优选为20〜100nm。