| abstract |
WATER-INSOLUBLE, CROSS-LINKED POLYELECTROLYTE COPOLYMERS OF (A) AN UNSATURATED MONOMER OF 2 TO 12 CARBON ATOMS AND (B) A MONOMER SELECTED FROM THE GROUP CONSISTING OF (1) A MIXTURE OF AN UNSATURATED POLYCARBOXYLIC ACID OR ANHYDRIDE AND AN UNSATURATED POLYCARBOXYLIC ACID AMINE-IMIDE, AND (2) AN UNSATURATED POLYCARBOXYLIC ACID AMINE-IMIDE, THE POLYMERIC UNITS OF THE POLYELECTROLYTE CONTAINING AT LEAST THREE PERCENT OF AN AMINE-IMIDE GROUP, WHICH GROUP IS A DILOWERALKYLAMINOLOWERALKYLIMIDE GROUP WHEREIN LOWER ALKY HAS 1 TO 5 CARBON ATOMS INCLUSIVE, INCLUDING ACID ADDITION AND QUATERNARY AMMONIUM SALTS THEREOF, THE POLYELECTROLYTE HAVING A MOLECULAR WEIGHT OF AT LEAST 1000. THE POLYELECTROLYTES ARE USED FOR PURIFYING WATER CONTAMINATED WITH VIRUSES, COLIFORM BACTERIA, OTHER MICROORGANISMS OR SURFACE ACTIVE AGENTS BY ADSORPTION. |