VERFAHREN UND ZWISCHENPRODUKTE FUER FLUORIERTES VINYLETHERMONOMER.

摘要

The CF2OR groups in vinyl ethers of the formula …… wherein n is 0 or 1 and R is CH3 or C2H5 and their bromine adducts are converted into -CO.R groups by treatment with a strong acid at a temperature of at least 25 DEG C but below the decomposition temperature of the starting material or acid. The resulting vinyl ethers having -CO.R groups can be copolymerized with, for example, tetrafluoroethylene to give copolymers useful as electrical insulation and as the sheath portion of optical fibers, and can be converted to known ion exchange polymers having carboxylic groups which are useful, e.g. in the form of a permionic membrane, for separating the compartments of a chloralkali cell.