Method for preparing carbonylic perfluoropolyethers

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United States of America Patent

PATENT NO 9249260
APP PUB NO 20100121106A1
SERIAL NO

12595037

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Abstract

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A process for preparing perfluoropolyethers of formula

description='In-line Formulae' end='lead'T-O—(RF)z-T′  (I)description='In-line Formulae' end='tail'

wherein:

    T, T' are end groups, z=0 or 1; RF is a perfluoro(poly)oxyalkylene chain containing one or more fluorooxyalkylene repeating units selected from the group consisting of (CF2O), —(CF(CF3)O)—, —(CF2CF2O)—, —(CF2CF(CF3)O)—, —(CF(CF3)CF2O)—, —(CF2CF2CF2O)—, —(CF2CF2CF2CF2O)—, and —(CF2)j—CFZ—O— wherein j is an integer from 0 to 3, and Z is a fluorooxyalkylene chain comprising from 1 to 20 repeating units selected from the above reported fluorooxyalkylene units; comprising the reduction of peroxidic perfluoropolyethers comprising one or more of the above defined repeating units by using gaseous hydrogen in the presence of a catalyst comprising one or more metals of the VIII group supported on graphitic materials.

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Patent Owner(s)

Patent OwnerAddress
SOLVAY SOLEXIS S P AVIALE LOMBARDIA 20 BOLLATE (MI) I-20021

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
De, Patto Ugo Cogliate, IT 22 86
Guarda, Pier Antonio Arese, IT 45 177
Marchionni, Giuseppe Milan, IT 108 626

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