PFPEs having at least an alkylether end group and respective...

Details PFPEs having at least an alkylether end group and respective... PFPEs having at least an alkylether end group and respective...

2006-07-28

2009-02-10

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S677000

Reexamination Certificate

active

07488852

ABSTRACT:
Processes for the preparation of perfluoropolyethers having structural formulain-line-formulae description="In-line Formulae" end="lead"?R1O—(CF2O)n—(CF2CF2O)mR2  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein:R1is —CH3or —C2H5; R2is equal to R1or —CF2Hn is 0 or an integer from 1 to 100; m is an integer from 1 to 100 or, when R2is —CF2H, m can also be 0; the oxyfluoroalkylene units —(CF2CF2O)— and —(CF2O)— are statistically distributed along the polymer chain.

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