Weak Base Styrene Anion Exchange Resin Weak Base Anion Exchange Resin is macroporous structure styrene and divinyl benzene copolymer molecule with tertiary amine groups ion exchange resin. Its basicity is weaker. Weak base anion resin can exchange inorganic acid effectively in acid, nearly neutral medium. Weak anion exchange resin feature: 1. High mechanical strength 2. Good anti-pollution performance 3. Good adsorption performance 4. High exchange capacity Appilcation: D301 is a macroporous weakly basic styrene-based Anion Exchange Resin. It can be used in desalination systems to protect strong alkaline anion exchange resins from organic pollution.