Method for preparing thioepoxy-based optical material and polymerizable composition thereof
AssigneeKoc Solution Co., Ltd.
InventorsDong Gyu Jang, Soo Gyun Roh, Jong Hyo Kim
Life of this patent
Estimating the term…
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.
Claims17
A polymerizable composition comprising a thioepoxy compound (A) and a compound (B) formed as a by-product in the preparation of the thioepoxy compound (A) wherein the compound (B) is at least one of 2,3-epoxypropyl(2,3-epithiopropyl)sulfide and 2,3-epoxypropyl(2,3-epithiopropyl)disulfide represented by Formula 1 and is present in an amount of 4.5 to 15% of the total weight of the compounds (A) and (B):
Dependencies are inferred from the claim text.