Coatable ion exchange resins
AssigneeFisons Limited
InventorsSan-Laung Chow, Yegnaswami Raghunathan
Life of this patent
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Abstract
Sulfonic acid cationic exchange resin particles which have been treated to improve their coatability with up to about 20% by weight of a compound selected from hydroxypropylmethyl cellulose, hydroxypropyl cellulose, hydroxypropyl sorbitol, sorbitol, and polyvinylpyrrolidone.
Claims6
A process for enhancing the coatability of sulfonic acid cationic exchange resin particles which comprises contacting said particles with an aqueous solution containing from at least about 3% to about 20% by weight of an impregnating agent, based on the combined weight of the impregnating agent and the particles, said agent being selected from the group consisting of hydroxypropylmethyl cellulose, hydroxypropyl cellulose, sorbitol, hydroxypropyl sorbitol, and polyvinylpyrrolidone, and thereafter individually coating said particles with a waterpermeable diffusion barrier.
Dependencies are inferred from the claim text.