Patent ID: 7148319

Claim:
A process for the alkylation of crosslinked polymers containing an amine N atom which comprises: a) deprotonating a gelled polymer obtained by polymerization and crosslinking in water, an organic solvent or in an organic solvent/water mixture by addition of a base, b) optionally washing the gelled polymer one or more times with water, an organic solvent or an organic solvent/water mixture, then c) adding one or more alkylators at atmospheric or elevated pressure at a temperature of between 5 and 160° C. to a gel suspension formed by stirring said gel polymer in water, an organic solvent or in an organic solvent/water mixture, and, after a mixing time of 1 to 60 minutes, adding the base continually or in plural portions in such a way that the pH is between 8 and 13.5, and d) reprotonating by means of a mineral acid, after one or more optional washing steps, whereby the correspondingly alkylated, crosslinked polymers containing an amine N atom is obtained.