A particulate water absorbent contains a water absorbent resin as a main component, the water absorbent resin being a crosslinked polymer of a water-soluble unsaturated monomer. The water absorbent resin is particular in shape and contains particles of a particle size in a range of not less than 106...http://www.google.com/patents/US20050221980?utm_source=gb-gplus-sharePatent US20050221980 - Particulate water absorbent containing water absorbent resin as a main component
