Ion exchange resin
AssigneeMonash University
InventorsFrank Lawson, William Harold Jay
Life of this patent
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Abstract
An ion exchange resin comprising an ion exchange material dispersed or distributed throughout a polyurethane matrix. The ion exchange material is typically a second polymer which has been chemically modified after dispersion or distribution throughout the polyurethane matrix.
Claims35
An ion exchange resin comprising a polymer that contains ion exchanging sites, wherein said polymer is dispersed or distributed throughout a continuous phase polyurethane matrix, to form an interpenetrating polymer system, and wherein said ion exchanging sites are introduced subsequent to the formation of said polyurethane matrix, so as to maintain the physical and chemical properties of said polyurethane matrix, whereby the majority of said ion exchanging sites are located close to or at the surface of said polymer.
A method of producing an ion exchange resin comprising:
- introducing a second polymer having no ion exchanging sites into urethane raw materials;
- conducting a polyurethane polymerisation reaction to form a continuous phase polyurethane matrix having said second polymer dispersed or distributed therein which is an interpenetrating polymer system;
- and
- chemically modifying said polymer to provide said ion exchanging sites, said ion exchanging sites being formed subsequent to the formation of said polyurethane matrix.
A method of producing an ion exchange resin comprising:
- providing a polyurethane interpenetrating polymer system which comprises a continuous phase polyurethane polymer having a second polymer dispersed within the polyurethane polymer;
- and
- chemically modifying said second polymer to provide ion exchanging sites, said ion exchanging sites being introduced subsequent to the formation of said interpenetrating polymer system.
A method of producing an ion exchange resin comprising:
- providing a polyurethane matrix;
- interpenetrating said matrix with one or more monomers, at least one of which has one of more ion exchange ligands attached;
- and
- polymerising said one or more monomers to provide said polymer containing ion exchanging sites and form an interpenetrating polymer system.
A method of producing an ion exchange resin comprising:
- providing an open cell polyurethane foam;
- interpenetrating said polyurethane foam with one or more monomers none of which have ion exchange ligands attached;
- polymerising said one or more monomers to provide a second polymer dispersed or distributed on the polyurethane foam to form an interpenetrating polymer system;
- and
- subsequent to the formation of said second polymer, chemically modifying said second polymer to provide ion exchanging sites.
Dependencies are inferred from the claim text.