Method for producing anion exchange resin and method for producing electrolyte membrane

A method for producing an anion exchange resin, comprising:

• (A) preparing a monomer for forming a hydrophobic group, being composed of a single aromatic ring or being composed of a plurality of aromatic rings which are connected to each other via a divalent hydrocarbon group, a divalent silicon-containing group, a divalent nitrogen-containing group, a divalent phosphorus-containing group, a divalent oxygen-containing group, a divalent sulfur-containing group, or direct bond, wherein two chlorine atoms are bonded to the single aromatic ring, or to each of two terminal aromatic rings of the plurality of aromatic rings;
• (B) preparing a monomer for forming a hydrophilic group, being composed of a single aromatic ring or being composed of a plurality of aromatic rings which are connected to each other via a linking group and/or via direct bond;
• wherein the linking group is a divalent hydrocarbon group, a divalent silicon-containing group, a divalent nitrogen-containing group, a divalent phosphorus-containing group, a divalent oxygen-containing group, or a divalent sulfur-containing group;
• two chlorine atoms are bonded to the single aromatic ring or to each of the two terminal aromatic rings of the plurality of aromatic rings;
• and at least one of the linking group or the aromatic ring of the single aromatic ring or the plurality of aromatic rings is connected to a precursor functional group for an anion exchange group via a divalent saturated hydrocarbon group or direct bond;
• (C) reacting the monomer for forming a hydrophobic group with the monomer for forming a hydrophilic group in the presence of bis(1,5-cyclooctadiene)nickel(0) as a catalyst, 2,2′-bipyridine as a co-ligand, a bromide or an iodide as a co-catalyst, and a reducing agent to synthesize a polymer;
• and
• (D) producing an anion exchange group by ionizing the precursor functional group to form the anion exchange resin;
• wherein a mole number of bis(1,5-cyclooctadiene)nickel(0) used in the step (C) is 0.3 to 1.8 times a total mole number of the monomer for forming a hydrophobic group and the monomer for forming a hydrophilic group;
• and
• wherein, in the anion exchange resin, a residue of the monomer for forming a hydrophobic group forms a divalent hydrophobic group;
• a residue of the monomer for forming a hydrophilic group having the anion exchange group forms a divalent hydrophilic group;
• and the hydrophobic group is connected to the hydrophilic group via direct bond.