PFPEs having at least an alkylether end group and respective preparation process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 10, 2009
Grant Date -
Nov 23, 2006
app pub date -
Jul 28, 2006
filing date -
Jun 26, 2001
priority date (Note) -
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Abstract
Processes for the preparation of perfluoropolyethers having structural formula R.sub.1O--(CF.sub.2O).sub.n--(CF.sub.2CF.sub.2O).sub.mR.sub.2 (I) wherein: R.sub.1 is --CH.sub.3 or --C.sub.2H.sub.5; R.sub.2 is equal to R.sub.1 or --CF.sub.2H n is 0 or an integer from 1 to 100; m is an integer from 1 to 100 or, when R.sub.2 is --CF.sub.2H, m can also be 0; the oxyfluoroalkylene units --(CF.sub.2CF.sub.2O)-- and --(CF.sub.2O)-- are statistically distributed along the polymer chain.
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