Composition for optical materials, process for production thereof, and optical materials made from the composition

Composition for optical materials, process for production thereof, and optical materials made from the composition

  • CN 102,762,637 B
  • Filed: 02/21/2011
  • Issued: 04/01/2015
  • Est. Priority Date: 02/25/2010
  • Status: Active Grant
First Claim
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1. a composition for optical material, is characterized in that, being below 0.5ppm containing episulfide and the turbidity value at initial stage and preserving the turbidity value after 7 days at 50 DEG C is the polythiol of below 0.6ppm,Wherein, described episulfide is the compound that the compound that represents of compound, following formula (2) or formula (3) that following formula (1) represents or following formula (4) represent,

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