Method for producing water-soluble polymer and method for producing water-absorbent resin

• Main Authors: OTA KYUSHU, HOSOMI TETSUYA, NOZAKI TAKAHIRO, MIYATA MANABU, TANAKA ATSUSHI, NISHIMOTO TOMOYUKI
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP

Provided are: a method for producing a water-soluble polymer with high production efficiency; and a method for producing a water-absorbent resin having excellent water absorption performance. The present invention relates to a method for producing a water-soluble polymer, the method comprising: a step (a1) for obtaining a partial decomposition product of starch by reducing the molecular weight of starch; and a step (a2) for introducing an ionic functional group into the partial decomposition product of the starch obtained in the step (a1). 本发明提供生产效率高的水溶性聚合物的制造方法和吸水性能优异的吸水性树脂的制造方法。本发明涉及一种水溶性聚合物的制造方法，其包括：将淀粉低分子量化而得到淀粉的部分分解物的工序(a1)；以及向工序(a1)中得到的淀粉的部分分解物中导入离子性官能团的工序(a2)。