Plastic lens
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United States of America Patent
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-
Aug 3, 1982
Grant Date -
N/A
app pub date -
Feb 12, 1981
filing date -
Feb 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plastic lens composed of a cured product of a mixture or a reaction produce of (A) a compound containing at least 2 unsaturated cycloacetal groups per molecule, (B) a compound containing at least 2 mercapto groups per molecule and (D) an aliphatic polyvinyl compound selected from the group consisting of ethylene glycol diacrylate, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetraacrylate and dipentaerythritol hexaacrylate.
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