Perfluoropolyether derivatives, and lubricants and magnetic recording medium using the same
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United States of America Patent
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Sep 26, 1995
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N/A
app pub date -
Jun 19, 1992
filing date -
Jun 20, 1991
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Abstract
Novel perfluoropolyether derivatives are described which are obtained from perfluoropolyethers having a carboxyl group at one or both ends and monoamines or diamines. The derivative is useful as a lubricant owing to its significantly improved lubricity. The lubricity is shown under severe high or low temperature and humidity conditions over a long term. The derivative is especially useful as a lubricant for magnetic recording mediums of the coating and metal thin film types.
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