Process for preparing aromatic polyethers
AssigneeImperial Chemical Industries PLC
InventorPhilip Anthony Staniland
Life of this patent
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Abstract
Aromatic polyether ketones, polyether sulphones and etherketone/sulphone copolymers are made by heating a molar excess of a dihalogenobenzenoid compound having halogen atoms activated by ketone or sulphone groups at 250.degree. to 400.degree. C with dialkali metal salt of a bisphenol containing ketone or sulphone linking groups in the presence of certain diaryl sulphones to form a prepolymer and then adding an additional amount of a dialkali metal salt of a bisphenol containing ketone or sulphone linking groups and continuing polymerization.
Claims10
A process for the manufacture of aromatic polyethers whose molecular chains contain phenylene groups, oxygen atoms and ketone and/or sulphone groups comprising
- i. heating a monomer mixture consisting essentially of
- 1. 30 to 49.99% molar of at least one di(alkali metal) salt of a bisphenol selected from the group consisting of ##STR8## at least 95% of the phenolic OH groups being in the para position, Q is --SO.sub.2 -- or --CO--, m is 0, 1, 2 or 3 and n is 1, 2 or 3, and
- 2.
Dependencies are inferred from the claim text.