| abstract |
The present invention provides a method for preparing a resin lens, comprising: A) after mixing polyvalent isocyanate, modified isocyanate, catalyst and mold release agent, vacuum defoaming at 0-30° C. for 10-90 minutes to obtain material a; B ) Mix the material a with the sulfur-containing compound, and vacuum defoaming at 15-20° C. for 20-120 minutes to obtain a mixed monomer; C) After the mixed monomer is poured, it is cured to obtain a resin lens. The invention adopts polyvalent isocyanate and modified isocyanate at the same time, the glass transition temperature of the prepared resin lens is higher, the surface hardness is higher, and the phenomenon of material grain and edge fogging will not be generated at the same time. The present invention further limits the preparation method of the modified isocyanate, and the obtained modified isocyanate is used in combination with the polyvalent isocyanate, which can further improve the glass transition temperature and surface hardness of the resin lens, and at the same time, the phenomenon of material grain and edge fogging will not be generated. |