Sulphonated polyarylethersulphone copolymers
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United States of America Patent
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-
Jun 16, 1981
Grant Date -
N/A
app pub date -
Aug 21, 1979
filing date -
Sep 5, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polyarylethersulphone copolymer which is a hydrophilic sulphonated copolymer derived by controllably sulphonating a copolymer having the repeat unit of formula ##STR1## together with the repeat unit B of formula ##STR2## substantially all the units A being sulphonated after sulphonation and substantially all the units B remaining non-sulphonated after sulphonation. The sulphonation is effected using 98% w/w sulphuric acid.
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