Chemie Linz Gesellschaft M.b.h.

Dsm Fine Chemcials Nfg Gmbh & Co Kg

Dsm Fine Chemicals Austria Nfg Gmbh & Co. Kg

Georg Häubl

Michael Stanek

Walter Raml

Erich Steinwender

Marion Wagner

Gerhard Schoppel

Ernst Wressnegger

Willibald Scheuchenstuhl

Process for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, in which the gelled and washed polymers obtained by polymerization, crosslinkage and optionally alkylation are dried continuously using a gaseous medium under normal pressure or overpressure in a fluidized bed.

Process for the continuous drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups

Absorbing polymer consisting of a polymer A which is an optionally modified polyvinyl alcohol or an optionally modified polysaccharide or a mixture of these, and of a polymer B which is a maleic anhydride homo- or copolymer having a hydrolysis time of 5 to 120 minutes, the anhydride groups being open and 0.005 to 5 mol % of the acid functions being esterified with hydroxyl groups of polymer A, and the remaining acid functions being present as free acid groups, as salts or as acid amide groups, an absorbing product containing this polymer and a process for their preparation.

Absorbing polymer

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Linz, Austria

Georg Häubl