| 摘要 |
PURPOSE:To obtain the title agent which can be scattered evenly, by treating a carbon black with an aqueous solution of a humic acid salt and dispersing the treated carbon black in water. CONSTITUTION:A carbon black having an aggregate Stokes' diameter of 10nm or greater is treated with an aqueous solution of an ammonium, potassium or calcium salt of humic acid, and kneaded to form a paste, which is dispersed in water to give the title agent containing 20wt.% or less, preferably 15wt.% or less, carbon black. |
