Fluoropolymers and membranes comprising fluoropolymers (I)
AssigneePall Corporation
InventorsFrank Okezie Onyemauwa, Hassan Ait-Haddou
Life of this patent
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Abstract
Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids using the porous membranes to remove metal ions, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes polymerized monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, the monomeric unit II is haloalkyl styrene, and optionally wherein the halo group of haloalkyl is replaced with an optional substituent, for example, ethylenediamine tetra acetic acid, iminodiacetic acid, or iminodisuccinic acid.
Claims15
A copolymer comprising polymerized monomeric units I and II, wherein:
- monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf-(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is S, and B is vinylphenyl,
- monomeric unit II is haloalkyl styrene, and further
- wherein one or more of the halo groups of the haloalkyl groups present in the copolymer have been replaced with a substituent selected from the group consisting of alkoxy, alkylcarbonyl, hydroxyalkyl, an acidic group, a basic group, a cation, an anion, a zwitterion, hydroxyl, acyloxy, alkylthio, aldehydo, amido, carbamoyl, ureido, cyano, nitro, ethylenediamine tetra acetic acid, iminodiacetic acid, and iminodisuccinic acid.
A porous membrane comprising a copolymer and a porous support,
- wherein the copolymer comprises polymerized monomeric units I and II, wherein:
- monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf-(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl,
- monomeric unit II is haloalkyl styrene, and further
- wherein one or more of the halo groups of the haloalkyl groups present in the copolymer have been replaced with a substituent selected from the group consisting of alkoxy, alkylcarbonyl, hydroxyalkyl, an acidic group, a basic group, a cation, an anion, a zwitterion, hydroxyl, acyloxy, alkylthio, aldehydo, amido, carbamoyl, ureido, cyano, nitro, ethylenediamine tetra acetic acid, iminodiacetic acid, and iminodisuccinic acid.
Dependencies are inferred from the claim text.