Preparation method and application of bead-shaped micro-crosslinking polyacrylamide papermaking reinforcing agent

• Main Authors: WANG HENG, ZHUANG XIANJUN, WU HENGSHAN, ZHANG HUYIN, WU LEXIAN, XIAO JIE, SUN SHILIANG
• Format: Patent
• Language: Chinese; English
• Published: 17.01.2023
• 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

The invention provides a preparation method of a beaded micro-crosslinking polyacrylamide papermaking reinforcing agent, which comprises the following steps: S1, water phase preparation: dissolving acrylamide solid with water, adding a cationic ethylene polymeric monomer and a crosslinking monomer, and mixing to obtain a monomer aqueous solution; preparing an initiator, adding the initiator into the monomer aqueous solution, and uniformly mixing to prepare a water phase; preparing an oil phase: adding a surfactant and cyclohexane and/or methyl cyclohexane of which the volume is 1-3 times of that of the water phase into a reaction container to prepare the oil phase; s2, polymerization reaction and S3, post-treatment: after the reaction is finished, draining a product by adopting a Buchner funnel, and drying in a hot air oven at 60-65 DEG C to obtain the bead-shaped micro-crosslinking type cationic polyacrylamide papermaking reinforcing agent. The reinforcing agent prepared by the method is uniform in particle