| abstract |
The invention provides a method of making a novelnspherical form of granulated products that can be effectivelynused in various product forms in drug, fertilizer, foodstuff,nfeed, agricultural chemical, catalyst, ceramics, powdernmetallurgy, detergent, plastic, and bio-material fields, forninstance, as catalysts, lightweight materials, sound-insulatingnmaterials, microcapsules, and lightweightnaggregates. To obtain a granulated product comprising anspherical solid shell and having a spherical space therein, anpolymer having high water absorption properties is swollen bynthe absorption of water therein, and then brought in contactnwith a powder to form a powder layer all over the surface ofnthe swollen polymer particle. Then, this spherical particlenis dried, and fired if required. |