Sulphonated polymer resin and preparation thereof
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United States of America Patent
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Dec 16, 2003
Grant Date -
N/A
app pub date -
May 28, 2002
filing date -
Apr 23, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to sulphonated polymer resins, particularly polymer resins with a sulphonated shell layer, and the preparation thereof. Resins according to the invention are prepared by sulphonating a polymer in a non-swollen state with substantially pure gaseous sulphur trioxide substantially in the shell layer of the polymer particles. The polymer to be sulphonated can be for example a styrene-DVB copolymer. The resins according to the invention can be used for example as chromatographic resins, ion-exchange resins and catalyst resins.
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