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Novel hybrid sol for the production of abrasion-resistant sio2 antireflection coatings

  • US 20040248995A1
  • Filed: 03/19/2004
  • Published: 12/09/2004
  • Est. Priority Date: 09/21/2001
  • Status: Active Grant
First Claim
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1. Hybrid sol comprising [SiOx(OH)y]n particles, where 0<

  • y<

    4 and 0<

    x<

    2, which consist of a mixture of a first fraction of particles having a particle size of 4-15 nm and a second fraction of particles having a mean particle size of 20-60 nm, water and a solvent, obtainable by hydrolytic polycondensation of tetraalkoxysilanes in an aqueous, solvent-containing medium, giving silicon oxide hydroxide particles having a particle size of 4-15 nm, with addition of a monodisperse silicon oxide hydroxide sol having a mean particle size of 20-60 nm and a maximum standard deviation of 20%.

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