| 摘要 |
A novel perfluoropolyether derivative, which has at least one ester bond and is useful as a lubricant with a decomposition temperature of 300° C. or more, is obtained by an esterification reaction between a perfluoropolyether diol having hydroxyl groups at both ends thereof and represented by the formula (1) and a perfluoropolyether dicarboxylic acid having carboxyl groups at both ends thereof and represented by the formula (2): <?in-line-formulae description="In-line Formulae" end="lead"?>HOCH<SUB>2</SUB>-R-CH<SUB>2</SUB>OH (1) <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>HOOC-R'-COOH (2) <?in-line-formulae description="In-line Formulae" end="tail"?> wherein each of R and R' is a perfluoroether group.
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