Polymer, method for producing polymer, and method for producing membrane
AssigneeAGC Inc.
InventorsTakeshi Hirai, Daisuke Jomuta, Chikaya Tamitsuji, Takumi Okuyama
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Abstract
To provide a polymer wherein a linking group that connects the main chain of the polymer and a cyclic perfluoroaliphatic disulfonimide skeleton, is a fluoroalkylene group which may have an ether oxygen atom. A polymer which has either one or both of units represented by formula u1-1 and units represented by formula u1-2: RF1, RF2: a C1-3 perfluoroalkylene group; RF3: a C1-6 perfluoroalkylene group; m: 0 or 1; and X: a hydrogen atom, an alkali metal atom, a fluorine atom, an alkyl group, ammonium or the like.
Claims22
A polymer having either one or both of units represented by the following formula u1-1 and units represented by the following formula u1-2:
- where RF1 and RF2 are each independently a C1-3 perfluoroalkylene group, RF3 is a C1-6 perfluoroalkylene group, m is 0 or 1, and X is a hydrogen atom, an alkali metal, a fluorine atom, a C1-10 alkyl group, a group having an etheric oxygen atom between carbon atoms of a C2-10 alkyl group, ammonium or phosphonium.
A method for producing a polymer, which comprises reacting polymer F having units represented by the following formula u2 with ammonia to obtain polymer Ia having units represented by the following formula u1a:
- where RF1 and RF2 are each independently a C1-3 perfluoroalkylene group, Q is —O— or —(O)nRf(O)m—, Rf is a C1-10 fluoroalkylene group or a group having an etheric oxygen atom between carbon atoms of a C2-10 fluoroalkylene group, m is 0 or 1, and n is 0 or 1.
A method for producing a membrane, which comprises extrusion-molding polymer F having units represented by the following formula u2 into a membrane shape, and then reacting the polymer F with ammonia to obtain a membrane comprising polymer Ia having units represented by the following formula u1a:
- where RF1 and RF2 are each independently a C1-3 perfluoroalkylene group, Q is —O— or —(O)nRf(O)m—, Rf is a C1-10 fluoroalkylene group or a group having an etheric oxygen atom between carbon atoms of a C2-10 fluoroalkylene group, m is 0 or 1, and n is 0 or 1.
Dependencies are inferred from the claim text.