Fluorinated amide compounds and their preparation

A fluorinated aide compound of the following general formula (1):

• A—(Rf—Q)n—Rf—A (1)
• wherein Rf is a divalent perfluoroalkylene group CmF2m wherein m is an integer of 2 to 15, or a divalent perfluorooxyalkylene group selected from groups of the following formulae (2), (3) and (4):
• 21
• wherein X is each independently F or CF3, p and q each are an integer of 0 to 200, r is an integer of 2 to 6, s is an integer of 1 to 6, t and u each are 1 or 2,
• 22
• wherein X is as defined above, v and w each are an integer of 1 to 100,
• —CF2CF2—(OCF2CF2CF2)y—OCF2CF2— (4)
• wherein y is an integer of 1 to 200,
• A is a monovalent organic group of the following formula (5) or (6):
• 23
• wherein R1 is a monovalent hydrocarbon group selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl groups of 1 to 10 carbon atoms and substituted ones of the foregoing groups in which some or all of the hydrogen atoms are substituted with halogen atoms,
• R2 is hydrogen or a monovalent hydrocarbon group selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl groups of 1 to 10 carbon atoms and substituted ones of the foregoing groups in which some or all of the hydrogen atoms are substituted with halogen atoms,
• Z is a divalent organic group of the following formula (7):
• 24
• wherein R3 is an oxygen atom or a divalent hydrocarbon group selected from the group consisting of alkylene, cycloalkylene, arylene groups of 1 to 8 carbon atoms, substituted ones of the foregoing groups in which some of the hydrogen atoms are substituted with halogen atoms, and combinations of alkylene with arylene,
• R4 is a monovalent hydrocarbon group selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl groups of 1 to 10 carbon atoms and substituted ones of the foregoing groups in which some or all of the hydrogen atoms are substituted with halogen atoms,
• R5 is a monovalent hydrocarbon group selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl groups of 1 to 10 carbon atoms, aliphatic unsaturation-bearing monovalent hydrocarbon groups of 2 to 20 carbon atoms, and substituted ones of the foregoing groups in which some or all of the hydrogen atoms are substituted with halogen atoms,
• Q is a divalent organic group of the following formula (8):
• 25
• wherein R1, R2 and Z are as defined above, and
• n is an integer of at least 1.