Process for granulating a water-absorbent resin employing (a) water (b) inorganic powder & (c) surfactant in an inert solvent
AssigneeSeitetsu Kagaku Co., Ltd.
InventorsShigeji Obayashi, Morio Nakamura, Takushi Yamamoto, Hitoshi Tanaka, Yuji Sakamoto, Yasuhiro Shimada
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Abstract
A water-absorbent resin having an appropriate particle size and a narrow particle size distribution can be obtained by adding a powdered inorganic material in a proportion of 0.000005-0.2 part by weight to 1 part by weight of a water-absorbent resin containing therein a carboxylate as a component of the polymer with agitation in an inert solvent in the presence of 0.1-5.0 parts by weight of water and 0.005-0.2 part by weight of a surfactant and then removing water and the inert solvent by distillation.
Claims11
A process for granulating a water-absorbent resin, characterized in that 0.000005-0.2 part by weight of a powdery inorganic material is added with agitation in an inert solvent in the presence of 0.1-5.0 parts by weight of water and 0.005-0.2 part by weight of a surface active agent to 1 part by weight of a water-absorbent resin containing a carboxylate as a constituent of the polymer, and the water and the inert solvent are removed by distillation.
Dependencies are inferred from the claim text.