Method for preparing thioepoxy-based optical material and polymerizable composition thereof
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United States of America Patent
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Jun 21, 2016
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Nov 13, 2014
app pub date -
Jan 21, 2013
filing date -
Jan 20, 2012
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Abstract
The present invention relates to a thioepoxy compound for an optical material, a polymerizable composition including the thioepoxy compound, and a method for producing a thioepoxy optical material by polymerization of the polymerizable composition. The polymerizable composition further includes 4.1 to 15% by weight of 2,3-epoxypropyl(2,3-epithiopropyl)sulfide and/or 2,3-epoxypropyl(2,3-epithiopropyl)disulfide. The thioepoxy optical material is free from color instability, demolding, and polymerization imbalance, which are problems encountered in general thioepoxy optical materials.
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