Photochromic coating exhibiting improved performance
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United States of America Patent
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Feb 7, 2012
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N/A
app pub date -
Jun 18, 2009
filing date -
Jun 19, 2008
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Abstract
A photochromic coating exhibiting improved performance and photochromic lenses made using the coating. The coating has excellent photochromic darkening and fatigue properties. The coating formulation is made from a monomer blend having at least two different types of monomers. A metal salt catalyst is used along with an initiator. An antioxidant is used in combination with a hindered amine light stabilizer. The coating is suitable for use in an in-mold coating process.
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