Method for manufacturing resin for urethane-based optical material, resin composition for same, and optical material manufactured thereby
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United States of America Patent
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Jun 9, 2015
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Nov 14, 2013
app pub date -
Dec 29, 2011
filing date -
Dec 29, 2010
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Abstract
A method of preparing an optical material by polymerizing a resin composition including a thiol group-containing compound and an isocyanate group-containing compound, particularly, a method of preparing a high-quality urethane-based optical material using a universal polyisocyanate compound. According to one aspect, a resin composition including a polythiol compound and a widely available polyisocyanate compound, as main components, and having a moisture content of 300 to 3,000 ppm is template-polymerized to prepare the optical material. A colorless, transparent, and high-quality urethane-based optical material may be efficiently prepared in high yield using a low-cost and widely available isocyanate compound through template-polymerization using a tape while minimizing generation of white tape residues and foaming.
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