Patent ID: 7053129

Claim:
A process for preparing monodisperse anion exchangers comprising (a) reacting monomer droplets made from at least one monovinylaromatic compound including styrene and at least one polyvinylaromatic compound to give a monodisperse, crosslinked bead polymer, wherein the polyvinylaromatic compound is an amount from about 1% to 20% by weight based on the mixture with the monomer or mixture with other monomers, wherein the monomer droplets include initiators or mixtures of initiators in an amount of about 0.05% to 2.5% by weight based on the mixture with the monomer or mixture with other monomers, (b) amidomethylating the monodisperse, crosslinked bead polymer from step (a) with phthalimide or methylphthalimide, (c) convening the amidomethylated bead polymer from step (b) to an aminomethylated bead polymer, and (d) alkylating the aminomethylated bead polymer from step (c).