A METHOD OF PREPARING THIOURETHANE BASED OPTICAL MATERIAL

摘要

The present invention relates to a method of preparing a thiourethane based optical material, especially to a method of producing a transparent high quality optical material without colors and deformation in high yield and without generating striae and whitening due to unbalanced polymerization. The present invention provides the method of preparing the thiourethane based optical material polymerizing a polymerizable composition containing a polytiol compound and a polyiso(thio)cyanate compound in a mold, and the mixing, defoamation, and mold injection of the polymerizable composition is performed at 21-40°C. The thiourethane based optical material obtained by the present invention can replace exiting optical materials for various industries.