US Patent No: 4,610,762
Number of patents in Portfolio can not be more than 2000
Method for forming polymer films having bubble release surfaces
Stats
-
Sep 9, 1986
Issued date -
May 31, 1985
filing date -
06/739,933
serial no -
Expired
status
Importance
Loading Importance Indicators...
Abstract
The invention is a method for forming polymer films having a roughened surface using removable substrates comprising: (a) providing a removable substrate with a roughened surface; (b) forming a dispersion of a perfluorinated polymer containing sites convertible to ion exchange groups in a dispersant having: a boiling point less than about 110.degree. C.; a density of from about 1.55 to about 2.2; and a solubility parameter of from greater than about 7.1 to about 8.2 hildebrands; (c) depositing the dispersion onto the roughened, removable substrate; (d) removing the dispersant from the dispersion; and (e) removing the substrate. Particularly preferred as a dispersant is a compound represented by the general formula: XCF.sub.2 --CYZX' wherein: X is selected from the group consisting of F, Cl, Br, and I; X' is selected from the group consisting of Cl, Br, and I; Y and Z are independently selected from the group consisting of H, F, Cl, Br, I and R'; R' is selected from the group of perfluoroalkyl radicals and chloroperfluoroalkyl radicals having from 1 to 6 carbon atoms. The most preferred dispersant is 1,2-dibromotetrafluoroethane.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- International Classification not provided for expired patents
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 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 | 183 | 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 | |
|
|
|||
| 4,212,713 Electrolysis of aqueous solution of alkali metal chloride | 28 | 1978 | |
| 4,259,226 Solution of fluorinated polymer having carboxylic acid salt groups in polar hydroxylic solvent | 22 | 1979 | |
| 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 | |
| 4,468,301 Ion exchange membrane cell and electrolytic process using thereof | 5 | 1983 | |
|
|
|||
| 4,323,434 Process for electrolysis of alkali chloride | 11 | 1980 | |
| 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 | |
|
|
|||
| 4,348,310 Solutions of sulfonyl fluoride compounds and fluoropolymers | 36 | 1980 | |
| 4,349,422 Electrolysis process | 12 | 1981 | |
| 4,437,952 Coextruded multilayer cation exchange membranes | 11 | 1982 | |
|
|
|||
| 4,192,725 Electrolytic production of high purity alkali metal hydroxide | 35 | 1977 | |
| 4,298,697 Method of making sheet or shaped cation exchange membrane | 124 | 1979 | |
|
|
|||
| 4,457,815 Electrolytic cell, permionic membrane, and method of electrolysis | 8 | 1981 | |
|
|
|||
| 4,537,910 Method of producing cation-exchange membrane having roughed surface | 3 | 1983 | |
Patent Citation Ranking
- Citation Ranking not provided for expired patents