| 摘要 |
PURPOSE:To obtain the titled precursor excellent in heat resistance, moisture resistance, stain resistance, and slip and useful for coating optical transmission glass fiber, by condensing a tetracarboxylic acid (derivative) with a diamine and a specified compound. CONSTITUTION:A polyimide precursor having an intrinsic viscosity (as measured in N-methyl-2-pyrrolidone at 0.5g/100ml and 30 deg.C) of 0.3-3 is obtained by condensing a tetracarboxylic acid or its derivative (e.g., pyromellitic acid) with a diamine (e.g., m-phenylenediamine) and a compound having both a perfluoroalkyl group and one amino group in the molecule, represented by formula II (wherein R is a divalent diamine residue), obtained by an addition reaction between a perofluoroalkyl group-containing epoxide of formula I (wherein n is 2-30) and a diamine, at 0-200 deg.C for 1-10hr in an organic solvent (e.g., N,N-dimethylformamide).
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