Process for the preparation of fluorinated carboxylic acid fluorides
    52.
    发明授权
    Process for the preparation of fluorinated carboxylic acid fluorides 失效
    制备氟化羧酸氟化物的方法

    公开(公告)号:US4985594A

    公开(公告)日:1991-01-15

    申请号:US389271

    申请日:1989-08-03

    CPC分类号: C07C51/58

    摘要: Process for the preparation of fluorinated carboxylic acid fluoridesFluorinated carboxylic acid fluorides of the Formula I ##STR1## can be prepared from fluorinated vinyl ethers of the Formula II ##STR2## by heating the vinyl ethers to a temperature of 100.degree. to 350.degree. C.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: 氟化氟化物的制备方法式I的氟化羧酸氟化物可以通过将乙烯基醚加热至100℃,由式II的氟化乙烯基醚制备(II) 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
    56.
    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。