Porous membrane
First Claim
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1. An integral porous membrane comprising an amorphous halopolymer comprising a fluorocopolymer including tetrafluoroethylene and a perfluoro-1,3-dioxole, wherein the porous membrane has a pore size of from about 0.1 μ
- m to about 10 μ
m.
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Abstract
The present invention provides integral porous membranes comprising an amorphous halopolymer, as well as processes for preparing the membranes, and devices comprising the membranes. An example of an amorphous halopolymer is a copolymer of tetrafluoroethylene and perfluoro-2,2-dimethyl-1,3-dioxole.
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Citations
34 Claims
- 1. An integral porous membrane comprising an amorphous halopolymer comprising a fluorocopolymer including tetrafluoroethylene and a perfluoro-1,3-dioxole, wherein the porous membrane has a pore size of from about 0.1 μ
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17. A process for preparing an integral porous membrane comprising an amorphous halopolymer, the process comprising:
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(a) providing a solution of said halopolymer the halopolymer comprising a fluorocopolymer including tetrafluoroethylene and a perfluoro-1,3-dioxide;
(b) shaping the solution to form a pre-membrane; and
(c) causing phase inversion of the pre-membrane to obtain the integral porous membrane, wherein the membrane has an average pore size of about 0.1 μ
m to about 10 μ
m.- View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification