METHOD FOR PREPARING POLYTHIOL COMPOUND, METHOD FOR PREPARING CURABLE COMPOSITION, AND METHOD FOR PRODUCING CURED PRODUCT
申请人:Hoya Lens Thailand Ltd.
公开号:EP3480185A1
公开(公告)日:2019-05-08
Provided is a method for producing a polythiol compound, the method including: step 1 of reacting 2-mercaptoethanol having a water content of 3000 ppm or less on a mass basis, with epihalohydrin to obtain a halide represented by the formula (1), wherein X represents a halogen atom; step 2 of reacting the halide represented by the formula (1) with an alkali metal compound selected from the group consisting of an alkali metal sulfide and an alkali metal hydroxide to obtain a polyol compound selected from the group consisting of a polyol compound represented by the formula (2) and a polyol compound represented by the formula (3); step 3 of reacting the polyol compound with thiourea in the presence of an acid to obtain an isothiuronium salt; step 4 of hydrolyzing the isothiuronium salt in the presence of a base to obtain a polythiol salt; and step 5 of converting the polythiol salt into a polythiol by an acid to obtain at least one polythiol compound selected from the group consisting of a polythiol compound represented by the formula (4), a polythiol compound represented by the formula (5), a polythiol compound represented by the formula (6), and a polythiol compound represented by the formula (7).
本发明提供了一种生产聚硫醇化合物的方法,该方法包括步骤 1:将水含量为 3000 ppm 或更低的 2-巯基乙醇与表卤代甲醇反应,得到由式(1)代表的卤化物,其中 X 代表卤素原子;步骤 2:将式(1)代表的卤化物与选自碱金属硫化物和碱金属氢氧化物的碱金属化合物反应,得到选自式(2)代表的多元醇化合物和式(3)代表的多元醇化合物的多元醇化合物;步骤 3:在酸存在下,使多元醇化合物与硫脲反应,得到异硫脲盐; 步骤 4:在碱存在下,水解异硫脲盐,得到聚硫醇盐;步骤 5 用酸将聚硫醇盐转化为聚硫醇,得到至少一种聚硫醇化合物,该化合物选自由式 (4) 所代表的聚硫醇化合物、式 (5) 所代表的聚硫醇化合物、式 (6) 所代表的聚硫醇化合物和式 (7) 所代表的聚硫醇化合物组成的组。