Method for preparing polythiol compound and polymeric composition for optical material comprising same
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United States of America Patent
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Dec 20, 2016
Grant Date -
May 28, 2015
app pub date -
May 23, 2013
filing date -
May 23, 2012
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Abstract
The present invention relates to novel methods for preparing a polythiol compound for use in an optical material and polymerizable compositions including a polythiol compound prepared by the methods. According to the methods, a polythiol compound with uniform color, high purity and high quality can be prepared at reduced cost. The polymerizable compositions can be used to manufacture clear, transparent optical lenses with good heat resistance and excellent optical properties.
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