Patent ID: 7105631

Claim:
A process for the preparation of alkylated N- or amino, ammonium or spirobicyclic or ammonium group-containing, crosslinked polymer gels, wherein a) in the crosslinkage step an aqueous solution of a polymer provided by polymerization of the corresponding monomer is adjusted to a pH of 7.5–14 at a temperature of 0 to 90° C., then the appropriate crosslinking agent is metered in and precrosslinkage is carried out with stirring and the precrosslinked polymer is transferred for complete curing to a curing container, whereupon b) the cured crude gel is cut into a defined shape, then c) washed with methanol batchwise in a static or stirred bed and directly following this d) in methanol, the alkylation is carried out by addition of one or more alkylators at a temperature from 5 to 90° C. and a pressure from 1 to 3 bar, addition of a base and optionally reprotonation, after which the alkylated gel e) is first washed batchwise by means of methanol/NaCl washes in a static or stirred bed or continuously, then f) batchwise by means of NaCl washes and final water washes with deionized water in a static or stirred bed or continuously.