Solvent-resistant composite membrane composition
First Claim
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1. A composite membrane composition comprising a monomer or a polymer, and a thickener, wherein the composition is coated on a porous support comprising at least one fluoropolymer.
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Abstract
A solvent-resistant composite membrane composition comprising polymer coated uniformly on porous filtration membranes can be used in a membrane separation process. The polymer compositions may further comprise comonomers, crossing monomers, catalysts, thickening agents, or other additives.
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Citations
22 Claims
- 1. A composite membrane composition comprising a monomer or a polymer, and a thickener, wherein the composition is coated on a porous support comprising at least one fluoropolymer.
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4. (canceled)
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5. (canceled)
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6. The composition of 1, wherein the thickening agent is a member selected from the group consisting of fumed silica, treated fumed silica, acrylic polymers, cross-linked acrylic polymer, alginates, carrageenan, microcrystalline cellulose, carboxymethylcellulose sodium, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, guar, guar derivative, organoclay, polyethylene, polyethylene oxide, polyvinylpyrrolidone, silica, water-swellable clay, and xanthan gum.
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10. A method of preparing a solvent-resistant composite membrane comprising the steps of:
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dissolving a monomer or a polymer in a solvent to form a coating solution;
adding a thickening agent to the coating solution;
contacting the coating solution with a porous support to form a coating; and
removing the solvent, wherein the coating has a thickness of 3 mils to 10 mils. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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22. A composite membrane composition comprising a thickener and at least one of a monomer and a polymer, wherein the composition is coated on a porous support comprising at least one fluoropolymer.
Specification