Process for producing fluoropolymer

    公开(公告)号:US20050250922A1

    公开(公告)日:2005-11-10

    申请号:US10521807

    申请日:2003-07-23

    摘要: The present invention provides a process for preparing a fluorine-containing polymer having few branched chains and little weight change in high temperatures, which is a new process wherein composition distribution substantially does not occur. The fluorine-containing polymer is prepared by a batch copolymerization process conducted under conditions of reduced temperature of at least 0.95 and reduced pressure of at least 0.80 of the critical constant calculated from critical temperature, critical pressure and composition ratio of each monomer in the gaseous phase of the reaction vessel using the Peng-Robinson formula; wherein when the number of monomer components in the target polymer is represented as n (n is an integer of 2 or larger), the name of each monomer component is represented as A1, A2, . . . An, the weight percentage of each monomer component A1, A2, . . . An of the target polymer composition is represented as a1, a2, . . . an (%) (a satisfies ∑ n ⁢ a n = 100 ) , the weight percentage of each monomer component of the initial monomer composition is represented as a′1, a′2 . . . a′n (%) (a′ satisfies ∑ n ⁢ a n ′ = 100 and a′1, a′2, . . . a′n is determined in a constant manner depending on predetermined polymerization conditions) and specific gravity of the gaseous phase monomers when polymerizing/specific gravity of the target polymer is represented as B, the composition weight ratio of additional monomers is calculated for each monomer from the formula (a1−a′1×B):(a2−a′2×B) . . . (an−a′n×B) in the order of components A1, A2, . . . An, and additional monomers containing additional monomers in the composition weight ratio of additional monomers are added.

    Method of chlorination of end of fluorine-containing compound
    12.
    发明授权
    Method of chlorination of end of fluorine-containing compound 失效
    含氟化合物末端氯化方法

    公开(公告)号:US06657094B1

    公开(公告)日:2003-12-02

    申请号:US10088736

    申请日:2002-03-22

    IPC分类号: C07C1720

    摘要: There is provided a method of end-chlorination of a fluorine-containing compound which can easily provide a fluorine-containing monomer having a functional group such as nitrile group at relatively low cost. The method of chlorinating an end of a fluorine-containing compound having iodine atom at an end thereof comprises reacting a fluorine-containing organic compound having iodine atom at a molecular end thereof and represented by the formula (I): RfCX2I  (I) wherein Rf is an organic residue having fluorine atom, X is hydrogen atom or chlorine atom, with a chlorine gas at a temperature of from 150° C. to 180° C. under irradiation with light to cleave the C—I bond and replace iodine atom with chlorine atom.

    摘要翻译: 提供了一种可以容易地提供具有诸如腈基等官能团的含氟单体的含氟化合物的端氯化方法,其成本较低。将含氟化合物的末端氯化为具有 在其末端的碘原子包括在其分子端具有由式(I)表示的具有碘原子的含氟有机化合物:其中Rf是具有氟原子的有机残基,X是氢原子或氯原子,与 在150℃至180℃的温度下,用光照射氯气以切割CI键并用氯原子代替碘原子。

    Nitrile group-containing fluoroelastomer and preparation process of same
    13.
    发明授权
    Nitrile group-containing fluoroelastomer and preparation process of same 有权
    含腈基的含氟弹性体及其制备方法

    公开(公告)号:US06518366B1

    公开(公告)日:2003-02-11

    申请号:US09937901

    申请日:2001-10-01

    IPC分类号: C08F818

    CPC分类号: C08F8/00 C08F8/30 C08F214/18

    摘要: To provide a solid fluoroelastomer having nitrile group at the end which gives a crosslinked product being excellent in heat resistance, solvent resistance, chemical resistance, compression set and cleanliness, and an economical process for preparation thereof. The process for preparing a nitrile group-containing fluoroelastomer by converting amide group contained in a polymer molecular chain of a solid fluoroelastomer into nitrile group in the presence of a dehydrating agent.

    摘要翻译: 为了提供在末端具有腈基的固体含氟弹性体,其赋予耐热性,耐溶剂性,耐化学性,压缩永久变形和清洁性优异的交联产物及其制备的经济方法。 通过在脱水剂的存在下将固体含氟弹性体的聚合物分子链中所含的酰胺基团转化成腈基来制备含腈基的含氟弹性体的方法。

    PROCESS FOR PREPARING FLUORINE-CONTAINING POLYMER
    16.
    发明申请
    PROCESS FOR PREPARING FLUORINE-CONTAINING POLYMER 审中-公开
    制备含氟聚合物的方法

    公开(公告)号:US20080255331A1

    公开(公告)日:2008-10-16

    申请号:US12015865

    申请日:2008-01-17

    IPC分类号: C08F214/22

    摘要: The present invention provides a process for preparing a fluorine-containing polymer having few branched chains and little weight change in high temperatures, which is a new process wherein composition distribution substantially does not occur. The fluorine-containing polymer is prepared by a batch copolymerization process conducted under conditions of reduced temperature of at least 0.95 and reduced pressure of at least 0.80 of the critical constant calculated from critical temperature, critical pressure and composition ratio of each monomer in the gaseous phase of the reaction vessel using the Peng-Robinson formula.

    摘要翻译: 本发明提供一种制备具有很少支链和在高温下重量变化小的含氟聚合物的方法,这是其中组合物分布基本上不发生的新方法。 含氟聚合物是通过间歇共聚方法制备的,所述间歇共聚方法是在降低至少0.95的温度和至少0.80的关键常数的减压条件下进行的,该临界常数由气相中各单体的临界温度,临界压力和组成比计算 的反应容器使用Peng-Robinson公式。

    Method of separating acid
    17.
    发明授权
    Method of separating acid 有权
    分离酸的方法

    公开(公告)号:US07423174B2

    公开(公告)日:2008-09-09

    申请号:US10477198

    申请日:2002-05-30

    摘要: The present invention provides a process for selectively separating HF and like acids present along with water-unstable organic acid fluorides. In particular, the invention provides a process for separating an acid from a system in which the acid and an organic acid fluoride are present, the organic acid fluoride being represented by formula (I): RCOF  (I) wherein R is a fluorine atom; a C1-20 linear, branched or cyclic alkyl or halogenated alkyl group that may contain a heteroatom; or a C6-20 aryl or halogenated aryl group that may contain a heteroatom; the process comprising using as a deacidifying agent an aromatic heterocyclic compound having a boiling point of at least 50° C. and having one or more nitrogen atoms as heteroatom.

    摘要翻译: 本发明提供了选择性分离与水不稳定的有机酸氟化物一起存在的HF等酸的方法。 特别地,本发明提供了从存在酸和有机酸氟化物的体系中分离酸的方法,有机酸氟化物由式(I)表示:<β在线式描述=“In “公式”end =“lead”?> RCOF(I)<?in-line-formula description =“In-line formula”end =“tail”?>其中R是氟原子; 可以含有杂原子的C 1-20烷基或卤代烷基; 或可含有杂原子的C 6-20芳基或卤代芳基; 该方法包括使用沸点为至少50℃并具有一个或多个氮原子作为杂原子的芳族杂环化合物作为脱酸剂。

    Process for preparing vulcanizable fluorine-containing elastomer
    18.
    发明授权
    Process for preparing vulcanizable fluorine-containing elastomer 有权
    制备可硫化含氟弹性体的方法

    公开(公告)号:US07375171B2

    公开(公告)日:2008-05-20

    申请号:US10542545

    申请日:2004-01-22

    IPC分类号: C08F14/18

    摘要: The present invention provides a process for preparing a fluorine-containing elastomer in a high productivity comparable to that of non-iodine transfer polymerization process by carrying out an iodine transfer polymerization at high pressure. The present invention also provides a fluorine-containing elastomer prepared by this process, and fluorine-containing molded articles. The process is a batch copolymerization process conducted under conditions that the reduced temperature of the critical constant is at least 0.95 and the reduced pressure of the critical constant is at least 0.80 wherein the reduced temperature and the reduced pressure are calculated using the Peng-Robinson formula from the critical temperature, the critical pressure and the composition ratio of each of the monomers in the gaseous phase in a reaction vessel, in which ethylenically unsaturated compounds containing at least one fluoroolefine are copolymerized in the presence of a compound having the formula: Rf1.Ix wherein Rf1 is a saturated or unsaturated fluorohydrocarbon or chlorofluorohydrocarbon group having 1 to 16 carbon atoms, and x is the number of bonds of Rf1 and an integer of 1 to 4.

    摘要翻译: 本发明提供了一种通过在高压下进行碘转移聚合制备与非碘转移聚合方法相当的高生产率的含氟弹性体的方法。 本发明还提供了通过该方法制备的含氟弹性体和含氟成型体。 该方法是在临界常数降低至少为0.95,临界常数降低至少为0.80的条件下进行的间歇共聚方法,其中降低的温度和减压是使用Peng-Robinson公式 在临界温度下,在具有下式的化合物的存在下,在反应容器中的气相中的每种单体的临界压力和组成比共聚,其中含有至少一个氟烯烃的烯键式不饱和化合物在具有下式的化合物的存在下共聚: 其中R 1是饱和或不饱和的氟代烃或其中R 1,R 2,R 3,R 4,R 5, 具有1至16个碳原子的氯氟烃基,x是R 1和...的整数1至4的整数。

    Process for preparing fluorine-containing polymer and fluorine-containing polymer prepared by said preparation process
    20.
    发明授权
    Process for preparing fluorine-containing polymer and fluorine-containing polymer prepared by said preparation process 有权
    通过所述制备方法制备含氟聚合物和含氟聚合物的方法

    公开(公告)号:US08193308B2

    公开(公告)日:2012-06-05

    申请号:US11913287

    申请日:2006-04-28

    IPC分类号: C08F6/00

    摘要: The present invention provides the process for preparing a fluorine-containing polymer which can easily and efficiently separate a fluorine-containing polymer and water from an aqueous dispersion of a fluorine-containing polymer, and the fluorine-containing polymer obtained by the mentioned preparation process. Further the present invention provides the molded article obtained by crosslinking a curable composition comprising the above-mentioned fluorine-containing polymer and a crosslinking agent. The preparation process is a process for preparing a fluorine-containing polymer comprising a step for heat-treating an aqueous dispersion of a fluorine-containing polymer having a concentration of 3 to 70% by weight to obtain the fluorine-containing polymer having a water content of not more than 1% by weight.

    摘要翻译: 本发明提供一种制备含氟聚合物的方法,其可以容易且有效地从含氟聚合物的水性分散体中分离含氟聚合物和水,以及通过所述制备方法得到的含氟聚合物。 此外,本发明提供通过交联含有上述含氟聚合物的固化性组合物和交联剂而得到的成型体。 制备方法是一种制备含氟聚合物的方法,其包括用于热处理浓度为3-70重量%的含氟聚合物的水性分散体的步骤,以获得含水量的含氟聚合物 不超过1重量%。