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US Patent 4330654 - Novel polymers having acid functionality
US Patent Issued on May 18, 1982
Estimated Patent Expiration Date:
June 11, 2000Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
June 11, 2000Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractPolymers and the process for producing polymers by the polymerization of at least three monomers wherein at least one monomer is selected from the group consisting of tetrafluoroethylene, trifluoromonochloroethylene, trifluoroethylene, vinylidene fluoride, 1,1-difluoro-2,2-dichloroethylene, 1,1-difluoro-2-chloroethylene, hexafluoropropylene, 1,1,1,3,3-pentafluoropropylene, octafluoroisobutylene ethylene, vinylchloride, trifluoronitrosomethane, perfluoronitrosoethane and alkyl vinyl ether,and at least one other monomer is selected from the group represented by the general formula: ##STR1## and at least one monomer is selected from the group of monomers represented by the general formula: ##STR2## These polymers are useful as ion exchange membranes in electrolytic cells, especially chlor-alkali electrolytic cells. Other uses include solid, strong acid catalyst useful in corrosive environments, electrodialysis and other similar membrane separation processes.Other References
| InventorsApplicationNo. 06/158425 filed on 06/11/1980US Classes:526/243, Fluorine-containing monomer contains a sulfur atom521/27, Membrane or process of preparing526/240, From metal containing monomer526/245, Fluorine containing monomer is a mono-carboxylic acid ester526/247, Fluorine containing monomer is an ether528/392, POLYMER OF AN ETHYLENICALLY UNSATURATED REACTANT WITH A SATURATED REACTANT528/401FROM FLUORINE-CONTAINING REACTANTField of Search526/247, Fluorine containing monomer is an ether526/240, From metal containing monomer526/243Fluorine-containing monomer contains a sulfur atomExaminersPrimary: Wong, Harry Jr.Attorney, Agent or FirmUS Patent References2393967, 2559752, 2593583, 3041317, 3114778, 3214478, 3242218, 3250806, 3282875, 3301893, 3351619, 3450684, 3536733, 3560568, 3784399, 3909378, 3969285, Heat-treated fluorocarbon sulfonylamine cation permselectivityIssued on: 07/13/1976 Inventor: Grot4025405, Electrolytic production of high purity alkali metal hydroxide Issued on: 05/24/1977 Inventor: Dotson , et al.4035254, OPERATION OF A CATION EXCHANGE MEMBRANE ELECTROLYTIC CELL FOR PRODUCING CHLORINE INCLUDING FEEDING AN OXIDIZING GAS HAVING A REGULATED MOISTURE CONTENT TO THE CATHODE Issued on: 07/12/1977 Inventor: Gritzner4035255, OPERATION OF A DIAPHRAGM ELECTROLYLYTIC CELL FOR PRODUCING CHLORINE INCLUDING FEEDING AN OXIDIZING GAS HAVING A REGULATED MOISTURE CONTENT TO THE CATHODE Issued on: 07/12/1977 Inventor: Gritzner4065366, Process for producing alkali metal hydroxide Issued on: 12/27/1977 Inventor: Oda , et al.4085071, Ion exchange polymer film, consisting of fluorinated polymer with N-monosubstituted sulfonamido groups method and apparatus for electrolysis of alkali or alkaline earth metal halide Issued on: 04/18/1978 Inventor: Resnick, et al.4126588, Fluorinated cation exchange membrane and use thereof in electrolysis of alkali metal halide Issued on: 11/21/1978 Inventor: Ukihashi , et al.4132682, Process for preparing cation-exchange membrane Issued on: 01/02/1979 Inventor: Seita , et al.4138373, Process for producing fluorinated copolymer having ion-exchange groups Issued on: 02/06/1979 Inventor: Ukihashi , et al.4138426, Alkyl perfluoro-ω-fluoroformyl esters and monomers therefrom Issued on: 02/06/1979 Inventor: England4151053, Cation exchange membrane preparation and use thereof Issued on: 04/24/1979 Inventor: Seko , et al.4166165, Terpolymers of tetrafluoroethylene, ethylene and fluorovinyl ether and process for producing the same Issued on: 08/28/1979 Inventor: Hisasue , et al.4192725, Electrolytic production of high purity alkali metal hydroxide Issued on: 03/11/1980 Inventor: Dotson , et al.4197179Electrolyte series flow in electrolytic chlor-alkali cells Issued on: 04/08/1980 Inventor: Ezzell , et al. International ClassesC08F 214/18 (20060101)C08F 214/00 (20060101) |
