NEW MATERIAL:An fluorine-containing aromatic diamine compound expressed by formula I [Rf represents-CnH2n-1 (n is 6-12), contains one double bond and may be suitably branched; hydrogen atoms in the aromatic ring may be substituted with lower alkyl, lower alkoxy, F, Cl or Br; two amino groups are respectively linked to the aromatic ring at the o-, p- or m-position with respect to the ether bond]. EXAMPLE:1,3-Bis-N-(ethyloxycarbonyl)amino-5-perfluorononenyloxybenzene. USE:Useful as a raw material for polyimides and polyamides. PREPARATION:A fluorine-containing aromatic diurethane compound expressed by formula II is subjected to deprotecting reaction of the urethane type protecting groups to afford the objective compound expressed by formula I. The compound expressed by formula II is obtained from a fluorine-containing aromatic dicarboxylic acid compound expressed by formula III, an azide compound expressed by formula IV (R3 is lower alkyl, etc.) and a compound expressed by formula V (R4 is alkyl, etc.).
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