New functionalized perfluoropolyethers and process for the preparation
thereof
    5.
    发明授权
    New functionalized perfluoropolyethers and process for the preparation thereof 失效
    新的功能化全氟聚醚及其制备方法

    公开(公告)号:US4720527A

    公开(公告)日:1988-01-19

    申请号:US929831

    申请日:1986-11-13

    CPC分类号: C08G65/3236 C08G65/007

    摘要: A process for the scission of high molecular weight perfluoropolyethers having neutral end groups obtained from photo-oxidation processes of perfluoroolefins, or fluorination of hydrogenated polyalkylene oxides, or by polymerization with opening of the partially fluorinated oxetane ring, said scission being carried out in the presence of catalysts composed of fluorides, oxyfluorides, or oxides of transition metals, or of Al, Sn, Sb, at temperatures ranging from 150.degree. to 380.degree. C.; said scission process leads to the formation of low molecular weight perfluoropolyethers having neutral and acid end groups, the perfluoropolyethereal acids being subjectable to conversion reactions in order to obtain functionalized perfluoropolyethers and to be utilized to provide new polymers.

    摘要翻译: 具有中和端基的高分子量全氟聚醚的切断方法,其由全氟烯烃的光氧化方法获得,或者氢化聚环氧烷的氟化,或通过部分氟化的氧杂环丁烷环的开放进行聚合,所述断裂在存在下进行 由氟化物,氟氧化物或过渡金属的氧化物或Al,Sn,Sb在150℃至380℃的温度下组成的催化剂。 所述断裂过程导致形成具有中性和酸端基的低分子量全氟聚醚,全氟多苯基酸可以转化为反应以获得官能化的全氟聚醚并用于提供新的聚合物。

    Cotelomers and a process for making them
    8.
    发明授权
    Cotelomers and a process for making them 失效
    Cotelomers和制作它们的过程

    公开(公告)号:US5446214A

    公开(公告)日:1995-08-29

    申请号:US329935

    申请日:1994-10-27

    CPC分类号: C08F214/18

    摘要: A cotelomer of --CH.sub.2 CF.sub.2 -- (VDF) units and CF.sub.2 CF(CF.sub.3)-- (HFP) units characterized in that the HEP units comprise at least 33% of all VDF and HFP units in the cotelomer combined. Also claimed is a process for preparing a cotelomer in the liquid state comprising reacting (A) a bromine geminal telogen having the general formula RC(R')Br.sub.2 wherein R and R' are selected from the group consisting of F and perfluorinated alkyl radicals having 1 to 8 carbon atoms; (B) 1,1-difluoroethene, and (C) hexafluoropropene, the molar ratio of said components (A):(B):(C) being x:1:1 to x:1:5, in which x is 1 to 5.

    摘要翻译: -CH2CF2-(VDF)单元和CF2CF(CF3) - (HFP)单元的调节子,其特征在于HEP单元包括组合中所有VDF和HFP单元的至少33%。 还要求保护的是制备液体状态调节剂的方法,其中包括使(A)具有通式RC(R')Br 2的溴偕取代物,其中R和R'选自F和具有全氟化烷基的全氟化烷基, 1至8个碳原子; (B)1,1-二氟乙烯和(C)六氟丙烯,所述组分(A):( B):( C)的摩尔比为x:1:1至x:1:5,其中x为1 到5。