The colloidal silica where the mean diameter which is calculated from the specific surface which was measured chemical machine grinding method null

摘要

As for the chemical machine grinding service water type dispersing element which relates to this invention, as for the mean diameter which is calculated from the specific surface which was measured (A) making use of BET method, the colloidal silica which is 10nm - 60nm and, (B) the organic acid which possesses the carboxyl group of two or more and the hydroxyl basis of one or more inside the monad and, (C) are shown with the below-mentioned general formula (1) four class ammonium compounds which and, it includes, at the same time, pH is 3 - 5. Conversion 5 ((1) in formula, R₁ or R₄, independently, displays the hydrocarbon radical. M ^- displays the anion.)