Two stage process of preparing polyaryletherketones

Details Two stage process of preparing polyaryletherketones Two stage process of preparing polyaryletherketones

1989-08-11

1992-06-16

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528128, 528174, 528219, 525471, 525534, C08G 802, C08G 1400, C08G 6540

Patent

active

051225875

ABSTRACT:
High molecular weight polyaryletherketones are prepared by nucleophilic polycondensation of a bisphenol with a mixture of a difluoroaromatic and a dichloroaromatic by a process in which, in a first stage, the total amount of bisphenol and dichloroaromatic is added and, in a second stage, the difluoroaromatic is added. The resulting polyaryletherketones have a reduced viscosity of not less than 0.65 and contain from 0.003 to 0.03% by weight of organically bonded chlorine and from 0.003 to 0.03% by weight of organically bonded fluorine.

REFERENCES:
patent: 4108837 (1978-08-01), Johnson et al.
patent: 4175175 (1979-11-01), Johnson et al.
patent: 4307222 (1981-12-01), Schwab et al.
patent: 4320224 (1982-03-01), Rose et al.
patent: 4751274 (1988-06-01), Ittemann et al.
"VIII. Drift of Copolymers Composition With Increasing Conversion", Alfrey et al., Copolymerization, Interscience Publishers, New York, 1952, pp. 147-156.

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