Patent ID: 7374787
Filing Date: 2008-05-20
Classification: B41M,C01P,C09C,C09D,C09G,C09K,D21H

Abstract:
1. A product aqueous dispersion, comprising: a silicon powder having a silicon dioxide content of 10 to 60 wt. %, wherein the aqueous dispersion is stable in the pH range of 2 to 6, the aqueous dispersion additionally contains at least one compound, which is at least partially soluble in aqueous solution in the pH range of 2 to 6 in the form of polyvalent cations, these being stable in a silicate-like environment as an anionic component of the particle surface of the silicon dioxide powder, the quantity of cation-providing compound in relation to the surface of the silicon dioxide is 0.001 to 0.1 mg cation-providing compound/m the zeta potential of the aqueous dispersion has values of less than or equal to zero, whereby the surface of the SiO