Process for preparing halogen-containing polyether.

摘要

A halogen-containing polyether comprising repeating units of the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="9" wi="87" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein a, b, c, d, e and f are each an integer not less than 0 and satisfy the following equations:
<Chemistry id="chema02" num="0002"><Image id="ia02" he="4" wi="33" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>and
<Chemistry id="chema03" num="0003"><Image id="ia03" he="5" wi="51" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>which may be prepared by ring-opening polymerizing 2,2,3,3-tetrafluorooxetane in the presence of any polymerization initiator to give a polyether comprising repeating units of the formula:
<Chemistry id="chema04" num="0004"><Image id="ia04" he="7" wi="87" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein a is the same as defined above, and optionally fluorinating and/or chlorinating the polyether (II).