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Microstructure-bearing articles of high refractive index

  • US 20040132858A1
  • Filed: 01/07/2003
  • Published: 07/08/2004
  • Est. Priority Date: 01/07/2003
  • Status: Active Grant
First Claim
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1. An article which is radiation curable to an optical resinous article having a surface with a replicated microstructure comprising a plurality of utilitarian discontinuities having an optical purpose, said article being curable to a cured article having a haze rating corresponding to a value, as determined by ASTM procedure D1003 on a flat film 3.2 mm thick on a bisphenol A polycarbonate substrate, of up to 5% and comprising:

  • (A) at least one oligomeric urethane multi(meth)acrylate, optionally in combination with at least one other monomer effective to reduce viscosity, improve thermomechanical properties or increase refractive index;

    (B) nanoparticles of at least one ethylenically unsaturated metal compound selected from the group consisting of tetravalent titanium and tetravalent zirconium compounds; and

    (C) at least one photoinitiator.

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