Aromatic polyetherketones

Details Aromatic polyetherketones Aromatic polyetherketones

2005-06-21

2005-06-21

Desai, Rita (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S400000

Reexamination Certificate

active

06909015

ABSTRACT:
The invention relates to polyetherketones and to a process for the preparation of aromatic polyetherketones which process comprises: a) self-condensing a compound of formula (I) wherein n represents 0 or 1 in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or b) condensing a compound of general formula (II) and a compound of general formula (III) wherein p and q independently represent 0 or 1, in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or c) a combination of a) and b)

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Ueda et al., Polymer Journal (Tokyo), vol. 21, No. 9, pp. 673-679 (1989).
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