Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1986-02-26
1988-07-12
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528126, 528128, 528219, C08G 802, C08G 1400
Patent
active
047571268
ABSTRACT:
A process for preparing a crystalline aromatic polyetherketone having a reduced viscosity of 0.6 or more is disclosed. The process includes polycondensing an aromatic dihydroxy compound with a dihalogeno aromatic ketone in a solvent having the following general formula (I) or (II): ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is independently a hydrogen atom, a C.sub.1-3 alkyl group or a phenyl group; X is an oxygen atom, a sulfur atom or a direct bond; Y is an oxygen atom or a ketone group; and n is 0 or 1;
in the presence of an alkali compound.
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Journal of Polymer Science, vol. 5, 2375-2398(1967), "Poly(aryl Ethers) by Nucleophilic Aromatic Substitution. I. Synthesis and Properties".
Polymer, vol. 22, "Synthesis and Properties of Polyaryletherketones".
Fukawa Isaburo
Tanabe Tsuneaki
Asahi Kasei Kogyo Kabushiki Kaisha
Kight John
Moore M. L.
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