NOVEL PAPERMAKING PROCESS USING A BASIC COPOLYMER HAVING REACTED WITH ALDEHYDE AS DRY RESISTANCE, RETENTION, DRIP, AND MACHINABILITY AGENT

摘要

A method of manufacturing a sheet of paper and / or paperboard and the like, wherein the cellulosic material is contacted with at least one dry strength agent, characterized in that said agent is a cationic (co) polymer or amphoteric resulting from the reaction between at least one aldehyde and at least one (co) polymer base comprising at least one nonionic monomer, said base copolymer being modified with at least one polyfunctional compound comprising at least 3 heteroatoms chosen from N, S, O, P, of which at least 3 of these heteroatoms each have at least one mobile hydrogen