Patent ID: 8377193
Filing Date: 2013-02-19
Classification: B01F,B82Y,C01P,C08K,C09C,C09D

Abstract:
1. An aqueous dispersion which comprises hydrophobized silicon dioxide particles, at least one polyol having 2 to 15 carbon atoms, at least one dispersing additive, a basic composition, and no color pigments, no inactive fillers, and no binders, wherein: the hydrophobized silicon dioxide particles have a methanol wettability of 30 to 60 and are present in the dispersion with a proportion of 0.1 to 50% by weight based on the dispersion; a proportion of water is 30 to 90% by weight based on the dispersion; the dispersing additive is at least one phosphate ester of an ethoxylated alcohol having 8 to 18 carbon atoms, a proportion of which is 3 to 25% by weight based on the proportion of the hydrophobized silicon dioxide particles; the basic composition comprises at least one amine of formulas RNH the at least one polyol is present with a proportion of 1 to 10% by weight based on the proportion of hydrophobized silicon dioxide particles; the phosphate ester, the basic composition, and the at least one polyol are soluble in an aqueous phase of the dispersion; and the pH of the dispersion is 9 to 11.