Production method of environment-friendly chlorine-free polyacrylamide wet strength agent and application thereof to papermaking

• Main Authors: XIE RUI, XIAO HANYU, PENG JING, XU BAOMING, YUAN SHIJU, PENG GUOQI, HU RONGYUE, LIU SHIYU
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2019
• 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 relates to a production method of a chlorine-free polyacrylamide wet strength agent and application thereof to papermaking. The process of the production method comprises three steps: 1,synthesizing a hydroxyacrylamide monomer from acrylamide and glyoxal; 2, hydrolyzing polysaccharide under the action of an enzyme, and then oxidizing to produce oxidized polysaccharide; 3, polymerizing the hydroxyacrylamide monomer and the oxidized polysaccharide to synthesize a final product, namely the polyacrylamide wet strength agent. The polyacrylamide wet strength agent produced according to the production method provided by the invention has the solid content of 15-25%, and the viscosity thereof is controlled at 30-35 mPa.s. The polyacrylamide paper wet strength agent achieves zero emission of chlorine and is environmentally friendly; moreover, the production method is simple in operation and low in cost, and is suitable for industrial production; in addition, the wet strength agent produced by the product