| abstract |
WET-STRENGTH RESINS ARE PROVIDED WHICH AFFORD TEMPORARY WET STRENGTH TO PAPER PRODUCTS. THE RESINS ARE CATIONIC POLYMERS OF UNSATURATED ALIPHATIC ALCOHOLS REACTED WITH POLYALDEHYDES. THEY ARE PREPARED, FOR EXAMPLE, BY CYANAMIDE MODIFICATION OF POLYVINYL ALCOHOL POLYMERS, FOLLOWED BY GLYOXAL CROSS-LINKING; OR BY COPOLYMERIZATION OF VINYL ACETATE AND DIALLYLDIMETHYLAMMONIUM CHLORIDE, FOLLOWED BY HYDROLYSIS AND GLYOXAL CROSS-LINKING. THESE RESINS ARE ADSORBED ON PAPERMAKING FIBERS IN AQUEOUS SUSPENSION DURING THE PAPERMAKING PROCESS AND IMPART TEMPORARY WET STRENGTH TO RESULTING PAPER PRODUCTS SUCH AS TISSUE, PAPER TOWELS AND THE LIKE. |