Sulphonated polymer resin and preparation thereof
AssigneeDanisco Finland Oy
InventorsAri Kärki, Erkki Paatero, Heikki Heikkilä, Heikki Mononen, Hannu Paananen, Jari Tiihonen
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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.
Claims60
A sulphonated alkenylaromatic polymer resin in a particle form, wherein said polymer resin is prepared by sulphonating non-swollen alkenylaromatic polymer particles with substantially pure gaseous sulphur trioxide substantially in the shell layer of the polymer particles.
A process for preparing a sulphonated alkenylaromatic polymer resin in a particle form, comprising sulphonating alkenylaromatic polymer particles in a non-swollen state with substantially pure gaseous sulphur trioxide substantially in the shell layer of the polymer particles.
Dependencies are inferred from the claim text.