Stable aqueous silica dispersions

Stable aqueous silica dispersions

  • CN 101,568,491 A
  • Filed: 10/17/2007
  • Published: 10/28/2009
  • Est. Priority Date: 10/20/2006
  • Status: Active Application
First Claim
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1. comprise the dispersion of at least a silicon-dioxide, it is characterized in that:

  • -described silicon-dioxide, preferred precipitated silica and/or silicate have greater than 50m 2The BET surface-area of/g;

    Silicon-dioxide coacervate in the-described dispersion has the median particle size d of 130~

    800nm 50-based on the total mass of described dispersion, the ratio of described silicon-dioxide is 5~

    50 weight %;

    The pH of-described dispersion is greater than 8;

    The ζ

    Dian Shi of-described dispersion when pH 9 is less than-20mV.

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