Color-neutral UV blocking coating for plastic lens
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United States of America Patent
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-
Sep 7, 1999
Grant Date -
N/A
app pub date -
Feb 13, 1997
filing date -
Feb 13, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Polymeric coatings containing both UV absorbers and dyes are employed to produce transparent, durable film coatings that can significantly increase the level of UV radiation blockage when coated onto substrates including ophthalmic lenses. The dye comprises 1-?(4-methylphenyl)amino!-4-hydroxy-9, 10-anthracenedione. The color-neutral film coatings are resistant to weather and UV degradation.
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Cited Art Landscape
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