1. Field of the Invention
This invention relates to a novel (2,3,4,5,6-pentafluorobenzoyl) diphenyl ether compound and a novel fluorine-containing aryl ether ketone polymer.
2. Description of the Related Art
The high-performance fluorinated polymers have been receiving considerable attention as interesting advanced materials for applications as films, coatings for optical and microelectronics devices, gas separation membranes and so on (Cassidy, P. E., Aminabbai, T. M. and Farley, J. M., J. Macromol. Sci.-Rev. Macromol. Chem. Phys. C29 (2 & 3), 365-429 (1989)). The incorporation of fluorine atoms into polymer chains leads to polymers with increased solubility, flame resistance, thermal stability and glass transition temperature while also leading to decreased color, crystallinity, dielectric constant and moisture absorption. Owing these advantages, poly(aryl ether ketone)s (PEK) containing hexafluoroisopropylidene units had been prepared and studied for the use in aerospace and electronic applications (Tullos, G. L. and Cassidy, P. E., Macromolecules, 24, 6059 (1991)). Recently, PEK's containing perfluophenylene moieties were synthesized from perfluorobenzophenone (Mercer, F. W., Fone, M. M., Reddy, V. N., and Goodwin, A. A., Polymer, 38 (8), 1989 (1997)).
These polymers, however, are still deficient in solubility and flame resistance.
An object of this invention, therefore, is to provide a novel (2,3,4,5,6-pentafluorobenzoyl)diphenyl ether compound for the use as a raw material of a novel fluorine-containing aryl ether ketone polymer exhibiting high mechanical strength and toughness and excelling in electrical properties, thermal oxidative stability, and solubility.
Another object of this invention is to provide a novel fluorine-containing aryl ether ketone polymer.
Yet another object of this invention is to provide a fluorine-containing aryl ether ketone polymer exhibiting high mechanical strength and toughness and excelling in electrical properties, thermal oxidative stability, and solubility.