Process for producing perfluoro unsaturated nitrile compounds
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United States of America Patent
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Feb 10, 1998
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N/A
app pub date -
Oct 18, 1996
filing date -
Nov 4, 1994
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Abstract
A perfluoro unsaturated nitrile compound represented by the following general formula: CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CN is produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula: CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)COOR followed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula: CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2 in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.
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