Preparation of sulphonated polyketones
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United States of America Patent
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Sep 7, 1993
Issued Date -
N/A
app pub date -
May 26, 1992
filing date -
Sep 14, 1989
priority date (Note) -
Expired
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Abstract
Sulphonated polyketones are prepared by reacting a linear alternating copolymer of carbon monoxide and one or more olefins (polyketone) with a sulphonating agent (e.g. chlorosulphoric acid) in a solvent (e.g. dichloromethane) at a temperature in the range -20.degree. to +40.degree. C. A molar excess of sulphonating agent is preferably used. The sulphonated polyketone produced contains one or more types of unit of formula--[COC(R.sup.1).sub.2 C(R.sup.1).sub.2 ]--wherein the R.sup.1 groups are independently H, C.sub.1 to C.sub.10 alkyl or SO.sub.3 H with the proviso that at least one R.sub.1 group is SO.sub.3 H.
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