Process for producing fluorinated copolymer having ion-exchange groups
Patent 4138373 Issued on February 6, 1979. Estimated Expiration Date: 
September 27, 1997. Estimated 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.
September 27, 1997. Estimated 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.Patent References3654245 InventorsAssigneeApplicationNo. 05/837225 filed on 09/27/1977US Classes:521/38, From ethylenically unsaturated reactant only525/326.2, Polymer derived from fluorine monomer526/247Fluorine containing monomer is an etherExaminersPrimary: Schafer, Joseph L.Assistant: Kulkosky, Peter F. Attorney, Agent or FirmInternational ClassesC08J 5/20 (20060101)C08J 5/22 (20060101) C08F 214/18 (20060101) C08F 214/00 (20060101) C08F 216/00 (20060101) C08F 216/14 (20060101) Foreign Application Priority Data1976-10-15 JPAbstractA fluorinated copolymer having 1 to 50 mole % of a component having functional group of carboxylic acid group or a group which can be converted to carboxylic acid group, is produced by copolymerizing a fluorinated ethylenic unsaturated monomer and a functional monomer having the functional group in the presence of a polymerization initiator source in an aqueous medium under the pressure of higher than 7 kg/cm2 whereby the copolymer having high molecular weight (TQ of higher than 150° C.) and an ion exchange capacity of 0.5 to 4 meq/g dry polymer is produced. | |
