Fluorinated carboxylic acid fluorides
    62.
    发明授权
    Fluorinated carboxylic acid fluorides 失效
    氟化氟酸氟化物

    公开(公告)号:US4987254A

    公开(公告)日:1991-01-22

    申请号:US389367

    申请日:1989-08-03

    CPC分类号: C07C51/58

    摘要: Fluorinated carboxylic acid fluorides of the formula I ##STR1## can be prepared from fluorinated vinyl ethers of the formula II ##STR2## by reacting the vinyl ethers with an oxygen-containing gas in the presence of a catalytic amount of a Lewis acid. Perfluorinated carboxylic acids and derivatives thereof can be prepared from the carboxylic acid fluorides by secondary reactions, for example hydrolysis, esterification or aminolysis.

    摘要翻译: 式I(I)的氟化羧酸氟化物可以由式II(II)的氟化乙烯基醚通过乙烯基醚与含氧气体在催化量的 路易斯酸。 全氟羧酸及其衍生物可以通过二次反应由羧酸氟化物制备,例如水解,酯化或氨解。

    Explosion taming surfactants for the production of perfluoropolymers
    69.
    发明授权
    Explosion taming surfactants for the production of perfluoropolymers 有权
    用于生产全氟聚合物的爆炸性游离表面活性剂

    公开(公告)号:US08119750B2

    公开(公告)日:2012-02-21

    申请号:US11457236

    申请日:2006-07-13

    IPC分类号: C08F16/24

    CPC分类号: C08F14/26 C08F2/22

    摘要: A process comprising polymerizing tetrafluoroethylene in an aqueous emulsion in the presence of a non-telogenic surfactant having an anionic portion with the general formula (I): Rf—O-L-CO2—  (I) wherein Rf is selected from a partially fluorinated alkyl group, a perfluorinated alkyl group, a partially fluorinated alkyl group interrupted by one or more oxygen atoms, and a perfluorinated alkyl group interrupted by one or more oxygen atoms, wherein Rf has from 1 to 10 carbon atoms; and L is an alkylene group having the general formula (CX2)n wherein each X is independently selected from Rf, fluorine, and hydrogen and n is selected from 1 to 5, with the proviso that the surfactant contains at least one unit selected from a —CH2— unit and a —CHF— unit. Also provided are aqueous dispersions comprising these surfactants and methods of coating substrates with the aqueous dispersions.

    摘要翻译: 在具有通式(I)的阴离子部分的非脱落表面活性剂存在下,在水乳液中聚合四氟乙烯的方法:Rf-OL-CO 2 - (I)其中Rf选自部分氟化的烷基, 全氟化烷基,被一个或多个氧原子间隔的部分氟化烷基和被一个或多个氧原子间隔的全氟化烷基,其中Rf具有1至10个碳原子; 并且L是具有通式(CX2)n的亚烷基,其中每个X独立地选自Rf,氟和氢,n选自1至5,条件是表面活性剂含有至少一个选自 -CH2-单元和-CHF-单元。 还提供了包含这些表面活性剂的水分散体和用水分散体涂覆底物的方法。