Method for the hydrolysis of a polymer

• Main Authors: Esser, Anton, Haehnle, Hans-Joachim, Isermann, Ralph
• Format: Patent
• Language: English
• Published: 25.06.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; IMPREGNATING OR COATING OF PAPER; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

Methods for producing final polymer A are provided that comprise the following steps:(A) providing a starting polymer V, the starting polymer V being obtainable by radical polymerization of the monomers (i), (ii), (iii), and (iv) as described herein in the amounts provided herein; and(B) hydrolyzing the provided starting polymer V under alkaline conditions to obtain the final polymer A, wherein the N-C(═O)R1 groups of formula (I) at least partially hydrolyze the monomers (i) polymerized into the starting polymer V to form primary amino groups.Certain final polymers A obtained are useful for a method for producing paper or cardboard comprising adding certain final polymers A to a first aqueous pulp suspension, dewatering the obtained second aqueous pulp suspension containing certain final polymers A on a water-permeable substrate to a wet paper structure, and further dewatering of the wet paper structure into a paper or cardboard.