MODIFIED CATIONIC POLYMERS, THEIR PREPARATION AND THEIR USE IN PAPERMAKING

摘要

The invention relates to modified cationic polymers which can be obtained by reacting (a) water-soluble, polymeric compounds containing NH groups with (b ) compounds which are at least bifunctional with regard to NH groups, which contain at least one alkyl radical or alkenyl radical having at least 8 C atoms, and which contain, as a functional group, a halohydrin, epoxide, carboxyl, chloroformate or isocyanate group or a halogen atom. The invention also relates to a method for producing the polymers by reacting the compound s of groups (a) and (b), and to the use of the modified cationic polymers duri ng the production of paper as fixing agents for papermaking stock containing interfering substances.