Sulphonated polyaryletherketones
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United States of America Patent
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-
Dec 6, 1983
Grant Date -
N/A
app pub date -
May 26, 1981
filing date -
Jun 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polyaryletherketone polymer which is a hydrophilic sulphonated polymer derived by controllably sulphonating a copolymer having the repeat unit of formula ##STR1## together with the repeat unit of formula ##STR2## at least 70% (preferably substantially all) of the units A being sulphonated after sulphonation and substantially all the units B remaining non-sulphonated after sulphonation. The sulphonation may be effected using 98% w/w concentrated sulphuric acid at an elevated temperature.
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