Water-absorbent resin and preparation method and application thereof

• Main Authors: WU XUEPING, REN JINGTIAN, YANG HUIJUAN, CUI CHENGXING, LIU ZUNCHUN
• Format: Patent
• Language: Chinese; English
• Published: 19.02.2019
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses water-absorbent resin and a preparation method and application thereof. The preparation method includes: taking 55-60 parts of acrylic acid, 30-35 parts of potassium hydroxide,0.02-0.04 part of N, N methylene bisacrylamide, 0.2-0.4 part of ammonium persulfate, 1-2 parts of inorganic clay, 0.5-1 part of aluminum sulfate, 0.4-0.8 part of surfactant and 4-8 parts of thickener; taking potassium hydroxide, dissolving for standby use, and using a potassium hydroxide solution to neutralize the acrylic acid to obtain a potassium acrylate solution of 60-80% in neutralizing degree; sequentially adding aluminum sulfate, the surfactant and N, N methylene bisacrylamide into the potassium acrylate solution; continuing to add the thickener, the inorganic clay and ammonium persulfate into the above solution, stirring well, and allowing polymerization and crosslinking reaction for 5min. The water-absorbent resin is used for seedling cultivation and is high in compatibility withplants, a crosslinking ag