| 摘要 |
PURPOSE:To efficiently obtained the titled aq. dispersion having high fluidity, excellent stability and useful for pigment and coating material, etc., by adding a specified salt and a water-soluble anionized denaturated PVA to CaCO3 and dispersing into an aq. medium. CONSTITUTION:Water soluble condensation phosphate (A) is obtained by reacting pyrophosphoric acid or hexamethaphosphoric acid with alkali metal such as Na, K and forming salt. Then, the water-soluble anionized denaturated PVA (B) having 30-700 degree of polymn., 30-100mol.% degree of saponification and 0.5-20mol.% degree of anionized denaturation is obtained by saponifying vinyl acetate/anionic monomer copolymer, etc. Then CaCO3 aq. suspension is formed by adding and dispersing 100pts.wt. CaCO3, 0.1-2pts.wt. A component and 0.03-1pt.wt. B component into the aq. medium. |
