Process for producing fluorinated copolymer having ion-exchange groups
AssigneeAsahi Glass Company, Limited
InventorsHiroshi Ukihashi, Tatsuro Asawa, Masaaki Yamabe, Haruhisa Miyake
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Abstract
A 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 0 to 10 mole of an inert organic solvent per 1 mole of the functional monomer under the pressure of higher than 6 kg/cm.sup.2 whereby the copolymer having high molecular weight (T.sub.Q of higher than 150.degree. C) and an ion exchange capacity of 0.5 to 4 meq/g dry polymer is produced.
Claims6
A fluorinated copolymer consisting essentially of 1-50 mole % of a functional fluorovinyl monomer having the formula:
- CF.sub.2 = CX--OCF.sub.2 CFY).sub.l (O).sub.m (CFY').sub.n A
- wherein l is 0 to 3;
- m is 0 or 1;
- n is 0 to 12;
- X represents --F or --CH.sub.3 ;
- Y and Y' represent --F or a C.sub.1-10 perfluoroalkyl group;
- A represents --CN, COF, --COOH, COOR.sub.1, COOM, or CONR.sub.2 R.sub.3 ;
- R.sub.1 represents a C.sub.1-10 alkyl group;
- R.sub.2 and R.sub.3 represent --H or --R.sub.1 ;
- M represents an alkali metal atom or a quaternary ammonium group;
- and 50-99 mole % of a copolymerizable fluorinated ethylenically unsaturated monomer, characterized by having the combination of properties of a T.sub.Q greater than 150.degree. C. and an ion exchange capacity of 0.5 to 4 meq/g of dry polymer;
- and which is produced by copolymerizing the constituent monomer in 0 to 10 moles of an inert organic solvent per 1 mole of said functional monomer under a pressure greater than 6 Kg/cm.sup.2.
A fluorinated copolymer consisting essentially of 1-50 mole % of a functional fluorovinyl monomer having the formula:
- CF.sub.2 = CX--OCF.sub.2 CFY).sub.l (O).sub.m (CFY').sub.n A
- wherein l is 0 to 3;
- m is 0 to 1;
- n is 0 to 12;
- X represents --F or --CH.sub.3 ;
- Y and Y' represent --F or a C.sub.1-10 perfluoroalkyl group;
- A represents --CN, COF, --COOH, COOR.sub.1, COOM, or CONR.sub.2 R.sub.3 ;
- R.sub.1 represents a C.sub.1-10 alkyl group;
- R.sub.2 and R.sub.3 represent --H or --R.sub.1 ;
- M represents an alkali metal atom or a quaternary ammonium group;
- and 50-99 mole % of a copolymerizable fluorinated ethylenically unsaturated monomer, characterized by having the combination of properties of a T.sub.Q greater than 150.degree. C. and an ion exchange capacity of 0.5 to 4 meq/g of dry polymer.
Dependencies are inferred from the claim text.