[EN] METHODS OF MAKING HALOGENATED FLUORINATED ETHER-CONTAINING COMPOUNDS [FR] PROCÉDÉS DE PRODUCTION DE COMPOSÉS HALOGÉNÉS CONTENANT DE L'ÉTHER FLUORÉ
[EN] METHODS OF MAKING HALOGENATED FLUORINATED ETHER-CONTAINING COMPOUNDS [FR] PROCÉDÉS DE PRODUCTION DE COMPOSÉS HALOGÉNÉS CONTENANT DE L'ÉTHER FLUORÉ
Hydrogen-containing flourosurfacant and its use in polymerization
申请人:E. I. du Pont de Nemours and Company
公开号:US05763552A1
公开(公告)日:1998-06-09
A partially-fluorinated surfactant having internal methylene groups and having the formula R.sub.f --(CH.sub.2).sub.m --R'.sub.f --COOM wherein m is 1-3, R.sub.f is perfluoroalkyl or perfluoroalkoxy, containing 3-8 carbon atoms, R'.sub.f is linear or branched perfluoroalkylene containing 1-4 carbon atoms, and M is NH.sub.4, Li, Na, K, or H is useful in polymerization of fluorinated monomers. High molecular weight can be achieved in homopolymerization of tetrafluoroethylene.
New and Efficient Syntheses of α-Iodo-α,α-Difluoro- and β-Iodo-α,α,β,β-Tetrafluorocarboxylic Acid Derivatives as Useful Building Blocks for Making Functional Fluoro Compounds
作者:Ming-H. Hung、Lu Long、Zhen-Yu Yang
DOI:10.1021/jo035170j
日期:2004.1.1
converted into various α-iodo-perfluorocarboxylic acid derivatives or telomerized with tetrafluoroethylene to I(CF2CF2)nOSO2Cl. Ring-opening reaction of perfluoroalkoxypentafluorocyclopropane with iodine at 240 °C produced ICF2CF2COF, which was quenched by alcohol, water, or NH3 to give β-iodo-α,α,β,β-tetrafluorocarboxylic acid derivatives. These functional fluorinated iodides can be used as building blocks
全氟烯烃与I-Cl和ClSO 3 H在温和的条件下反应,得到R F CFICF 2 OSO 2 Cl,可以很容易地将其转化为各种α-碘-全氟羧酸衍生物,也可以用四氟乙烯将其端粒化为I(CF 2 CF 2)n OSO 2 Cl。全氟烷氧基五氟环丙烷与碘在240°C下的开环反应生成ICF 2 CF 2 COF,将其用酒精,水或NH 3淬灭得到β-碘-α,α,β,β-四氟羧酸衍生物。这些功能性氟化碘化物可以用作制备选择性氟化化合物的结构单元。
Iodonitriles as chain transfer agents in the manufacture of
申请人:E. I. du Pont de Nemours and Company
公开号:US06166157A1
公开(公告)日:2000-12-26
Iodoperfluoroalkylnitriles are useful as chain transfer agents in the free radical polymerization of vinyl monomers to form perfluoropolymers. These nitrites provide end groups, which may take part in a cross-linking reaction, if desired, and also have a relatively low toxicity. The resulting perfluoropolymers are useful as molding resins and elastomers, particularly for parts where good chemical resistance and/or high temperature resistance are desirable.