| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing water-absorbing resin particles, not causing granulation, aggregation or the like in a dying step, slight in particle stick on the inner wall of a dryer and agitating blades, and enabling the particles to be dried efficiently and quickly. SOLUTION: The method for producing the water-absorbing resin particles comprises carrying out a reverse-phase suspension polymerization of an aqueous solution of a water-soluble ethylenically unsaturated monomer in the presence of a dispersant in a hydrophobic organic solvent. In this method, in drying hydrous water-absorbing resin particles subjected to solid/liquid separation from the suspension reaction liquid after polymerization with a dryer equipped with agitation blades, the hydrous water-absorbing resin particles stuck on the inner wall of the dryer are peeled off by the action of the agitating blades, allowed to flow, and dried in the presence of 1-30 wt.% of a hydrophobic organic solvent based on the hydrous water-absorbing resin particles in a dry inert gas atmosphere. COPYRIGHT: (C)2005,JPO&NCIPI
|
