COLLOIDAL SILICA AND METHOD FOR MANUFACTURING THE SAME
PROBLEM TO BE SOLVED: To provide a colloidal silica useful for ink absorbing fillers for printing paper, spreading improvers for coatings, hydrophilic coating material for various types of material surfaces, high-strength binders, high-purity silica gels, raw material for high-purity ceramics, binde...
Gespeichert in:
Hauptverfasser: | , , , |
---|---|
Format: | Patent |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a colloidal silica useful for ink absorbing fillers for printing paper, spreading improvers for coatings, hydrophilic coating material for various types of material surfaces, high-strength binders, high-purity silica gels, raw material for high-purity ceramics, binders for catalysts, abrasives for electronic materials, and the like. SOLUTION: The colloidal silica comprises a group of nonspherical deformed silica particles inside which urea is immobilized, or a group of nonspherical deformed silica particles in which urea is immobilized by disposing a coating containing silica containing urea as a main component, on the surface of the particles. The colloidal silica can be manufacture by bringing a silicic acid alkali aqueous solution into contact with a cation exchange resin to prepare an active silicic acid aqueous solution, thereafter adding urea and an alkali agent to the active silicic acid aqueous solution to make the solution alkali, thereafter heating the solution to form silica particles, and then growing silica particles by build-up means. COPYRIGHT: (C)2011,JPO&INPIT |
---|