Sulphonated polyaryletherketones
AssigneeImperial Chemical Industries PLC
InventorJohn B. Rose
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Abstract
A polyaryletherketone polymer which is a hydrophilic sulphonated polymer derived by controllably sulphonating a polymer having the repeat unit of formula ##STR1## alone or in conjunction with the repeat unit of formula ##STR2## the latter units, if present, remaining substantially non-sulphonated after sulphonation. The sulphonation may be effected using 98% w/w concentrated sulphuric acid.
Claims7
A polyaryletherketone polymer which is a hydrophilic sulphonated polymer having repeat units based on the repeat unit which, with no sulphonation, has the formula ##STR10## wherein up to 90% of said repeat units are sulphonated the sulphonation present being monosulphonation in the subunits ##STR11## said repeat units being alone or in conjunction with substantially non-sulphonated repeat units of formula ##STR12##
Dependencies are inferred from the claim text.