Eva containing ion selective membranes and methods of making same
First Claim
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1. An ion selective membrane, comprising:
- an ethylene vinyl acetate polymer, said polymer including from about 30 weight percent to about 75 weight percent vinyl acetate monomer and from about 0 percent to about 20 percent by weight plasticizer; and
an ion selective material dispersed within the ethylene vinyl acetate polymer, wherein said ion selective membrane is from about 0% crystalline to about 10% crystalline.
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Abstract
Ion selective membranes and ion selective electrode constructions which include ethylene vinyl acetate (EVA), a reduced amount of plasticizer and an ion selective material. The ion selective membranes have a low crystallinity. In certain embodiments, the ion selective membranes may further include polyvinyl chloride (PVC), a salt or a combination thereof. The ion selective membrane can be incorporated into an ion selective electrode construction. Methods of manufacturing the ion selective membranes and ion selective electrode constructions are provided.
23 Citations
26 Claims
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1. An ion selective membrane, comprising:
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an ethylene vinyl acetate polymer, said polymer including from about 30 weight percent to about 75 weight percent vinyl acetate monomer and from about 0 percent to about 20 percent by weight plasticizer; and an ion selective material dispersed within the ethylene vinyl acetate polymer, wherein said ion selective membrane is from about 0% crystalline to about 10% crystalline. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An ion selective membrane, comprising:
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a polymer formed from the polymerization product of; ethylene monomers; vinyl acetate monomers; and monomers of at least one additional vinyl species having a charged site or a polar group, said polymer including from about 30 weight percent to about 55 weight percent vinyl acetate monomer, said polymer being substantially devoid of plasticizer; and an ion selective material dispersed within the polymer, wherein said ion selective membrane is from about 0% crystalline to about 10% crystalline. - View Dependent Claims (17, 18, 19, 20, 21)
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22. In an ion selective electrode construction comprising at least one electrode, and an ion selective membrane operatively positioned with respect to said electrode, said membrane comprising:
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an ethylene vinyl acetate polymer, said polymer having from about 30 weight percent to about 75 weight percent vinyl acetate monomer and from about 0 percent to about 20 percent by weight plasticizer; and an ion selective material dispersed within the ethylene vinyl polymer, wherein said ion selective membrane is from about 0% crystalline to about 10% crystalline. - View Dependent Claims (23, 24, 25, 26)
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Specification