| 摘要 |
A curable fluorine-containing polyimide of the formula: <IMAGE> (I) wherein R1 is a group derived from an aromatic tetracarboxylic acid dianhydride by the removal of two acid anhydride groups, R2 is a group derived from an aromatic diamine by the removal of two amino groups, A1 is a residue of the formula: <IMAGE> or <IMAGE> (wherein R2 is the same as defined above, and Z is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms), A2 is a residue of the formula: <IMAGE> or <IMAGE> (wherein R1 and Z are the same as defined above), and n is a number of 0 to 90, and at least one of the groups R1 and R2 in the formula (I) contains a substituted methylene group of the formula: <IMAGE> (wherein X is a residue of the formula): <IMAGE> wherein Rf is a perfluoroalkyl group having 1 to 10 carbon atoms, R'f is a perfluoroalkyl group having 1 to 12 carbon atoms, p is an integer of 1 to 3, q is an integer of 0 to 3, r is 0 or 1, s is an integer of 0 to 5 and t is an integer of 0 to 5, and Y is the same as X or a hydrogen atom, an alkyl group having to 8 carbon atoms or a fluoroalkyl group having 1 to 8 carbon atoms, provided that, when Y contains no fluorine atom, X contains at least 9 fluorine atoms, or when Y contains at least one fluorine atom, the total number of the fluorine atoms contained in X and Y is at least 8.
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