Provided is a method for producing a molded product comprising preparing a polymerizable composition for optical materials and curing the polymerizable composition for optical materials to produce the molded product. The preparation of the polymerizable composition comprises preparing a polythiol compound containing, as a main component, one kind or two or more kinds selected from a defined group of compounds, and preparing the polymerizable composition from the polythiol compound. The preparation of the polythiol compound comprises reacting 2-mercaptoethanol with a defined epihalohydrin compound to obtain a defined compound, reacting the defined compound with sodium sulfide to obtain a defined polyalcohol compound, reacting the polyalcohol compound with thiourea in the presence of hydrogen chloride to obtain an isothiuronium salt, adding aqueous ammonia to a reaction solution containing the isothiuronium salt thereby hydrolyzing the isothiuronium salt to obtain the polythiol compound and purifying the polythiol compound with hydrochloric acid.
提供的是一种制备模塑产品的方法,包括准备用于光学材料的聚合物组合物并使其固化以生成模塑产品。聚合物组合物的制备包括准备含有多
硫化合物的组合物,其中,多
硫化合物的主要成分为从一组定义的化合物中选择的一种或两种或更多种,并从多
硫化合物中制备聚合物组合物。多
硫化合物的制备包括将
2-巯基乙醇与定义的环氧卤代烷化合物反应以获得定义的化合物,将定义的化合物与
硫化
钠反应以获得定义的多元醇化合物,将多元醇化合物与
硫脲在
氯化氢存在下反应以获得异
硫脲盐,将
氨水加入含有异
硫脲盐的反应溶液中,从而
水解异
硫脲盐以获得多
硫化合物,并用
盐酸纯化多
硫化合物。