| 摘要 |
PURPOSE:To obtain a method for producing a high-refraction resin using an internal releasant with superior dyeability and processability without occurrence of opaque. CONSTITUTION:When a diisocyanate and a mercaptoalkyl ester of a trivalent or more polyol are casted and polymerized in the presence of an initiator, one of a mineral oil releasant, a phosphate releasant, and a condensate releasant prepared by compounding a glyceride of a fatty alkyl ester and an organic acid with a synthetic resin is preheated in a temperature range of 80-150 deg.C, cooled, and added to a monomer mixture as an internal releasant. |
