US Patent No: 4,731,263
Number of patents in Portfolio can not be more than 2000
Method for the preparation of ionomer films
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Mar 15, 1988
Issued date -
Sep 26, 1986
filing date -
06/912,701
serial no -
Expired
status
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Abstract
The invention is a method for forming a perfluorosulfonate ionomer film comprising: (a) forming a solution of a perfluorosulfonate ionomer in its salt form; (b) coating a substrate with the perfluorosulfonate ionomer solution; and (c) heating the coated substrate to a temperature of at least about 120.degree. C. for sufficient time to deposit a solvent-resistant film of a perfluorosulfonate ionomer onto the substrate.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,330,654 Novel polymers having acid functionality | 120 | 1980 | |
| 4,337,137 Composite ion exchange membranes | 41 | 1980 | |
| 4,337,211 Fluorocarbon ethers having substituted halogen site(s) and process to prepare | 44 | 1980 | |
| 4,358,412 Preparation of vinyl ethers | 50 | 1980 | |
| 4,358,545 Sulfonic acid electrolytic cell having flourinated polymer membrane with hydration product less than 22,000 | 180 | 1980 | |
| 4,470,889 Electrolytic cell having an improved ion exchange membrane and process for operating | 43 | 1980 | |
| 4,417,969 Sulfonic acid electrolytic cell membranes | 66 | 1982 | |
| 4,462,877 Composite ion exchange membranes | 23 | 1982 | |
| 4,478,695 Sulfonic acid electrolytic cell membranes and use thereof in the electrolysis of sodium chloride | 39 | 1983 | |
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| 4,212,713 Electrolysis of aqueous solution of alkali metal chloride | 28 | 1978 | |
| 4,209,635 Process for producing perfluorinated vinyl ether having ester group | 33 | 1979 | |
| 4,251,333 Electrolysis of aqueous solution of alkali metal chloride | 27 | 1979 | |
| 4,270,996 Cation exchange membrane of fluorinated polymer for electrolysis and electrolysis using the membrane | 24 | 1979 | |
| 4,340,680 Cation exchange membrane of fluorinated polymer for an electrolysis | 28 | 1980 | |
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| 4,329,435 Novel fluorinated copolymer with tridihydro fluorosulfonyl fluoride pendant groups and preparation thereof | 50 | 1980 | |
| 4,357,218 Cation exchange membrane and use thereof in the electrolysis of sodium chloride | 34 | 1980 | |
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| 4,433,082 Process for making liquid composition of perfluorinated ion exchange polymer, and product thereof | 140 | 1981 | |
| 4,453,991 Process for making articles coated with a liquid composition of perfluorinated ion exchange resin | 58 | 1982 | |
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| 4,192,725 Electrolytic production of high purity alkali metal hydroxide | 35 | 1977 | |
| 4,434,116 Method for making a porous fluorinated polymer structure | 13 | 1981 | |
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| 4,277,344 Interfacially synthesized reverse osmosis membrane | 150 | 1979 | |