Cation-exchange polymer and methods of production
AssigneeBl Technologies, Inc.
InventorsKai ZHANG, Li May GOH, Seng Yong GOH, John H. BARBER, Russell James MACDONALD, Yongchang ZHENG, Yonghong ZHAO
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Abstract
The present disclosure provides a method of producing a cation exchange polymer, the method includes polymerizing an anionic monomer in the presence of a polymerizable crosslinker having a cationic functional group. A sufficient amount of anionic monomer is used to provide both the anionic charges necessary for cation exchange, and the anionic charges necessary to pair with the cationic functional groups in the crosslinker.
Claims28
A method of producing a cation exchange polymer, the method comprising:
- polymerizing, in a water-based solution, an anionic monomer in the presence of a crosslinker having a cationic functional group;
- wherein the anionic monomer comprises at least one polymerizable functional group, and the cationic crosslinker comprises at least two polymerizable functional groups;
- wherein the anionic monomer and the cationic crosslinker are soluble in the water-based solution, and the amounts of anionic monomer and cationic crosslinker are such that there is a molar excess of anionic charges in the polymerized cation exchange polymer.
A cation-exchange polymer comprising both cationic functional groups and anionic functional groups, wherein the anionic functional groups are in sufficient excess that the polymer has an ion exchange capacity of at least 1 meq/g.
Dependencies are inferred from the claim text.