Anion exchange resin, electrolyte membrane, binder for forming electrode catalyst layer, and battery electrode catalyst layer

An anion exchange resin, comprising:

• a divalent hydrophobic group (a) comprising a bisphenol residue represented by following formula (1);
• a divalent hydrophobic group (b) being composed of a singular aromatic ring, or being composed of a plurality of aromatic rings which are bonded 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 carbon-carbon bond;
• and
• a divalent hydrophilic group being composed of a singular aromatic ring, or being composed of a plurality of aromatic rings which are bonded to each other via a linking group and/or carbon-carbon 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, and at least one of the linking group or the aromatic ring is bonded to an anion exchange group via a divalent saturated hydrocarbon group having a carbon number of 2 or more;
• wherein the anion exchange resin comprises:
• a hydrophobic unit (a) being composed of the hydrophobic group (a) alone, or being composed of a plurality of the hydrophobic groups (a) repeated via ether bond, thioether bond, or carbon-carbon bond;
• a hydrophobic unit (b) being composed of the hydrophobic group (b) alone, or being composed of a plurality of the hydrophobic groups (b) repeated via ether bond, thioether bond, or carbon-carbon bond;
• and
• a hydrophilic unit being composed of the hydrophilic group alone, or being composed of a plurality of the hydrophilic groups repeated via ether bond, thioether bond, or carbon-carbon bond;
• and
• wherein the hydrophobic unit (a), the hydrophobic unit (b), and the hydrophilic unit are bonded via ether bond, thioether bond, or carbon-carbon bond.
• (In the formula, Alk are same or different from each other and represent an alkyl group or an aryl group;
• R represents a divalent hydrocarbon group forming an alicyclic structure;
• and a, b, c, and d are same or different from each other and represent an integer of 0 to 4.)