The preparation method of episulfide compound

Abstract

The invention provides a cyclic sulfide preparation method. The cyclic sulfide preparation method includes the following steps that (A) one of halogenated alcohol and halogenated epoxy propane is mixed with an alkaline catalyst in a solvent to obtain a mixed solution; (B) the mixed solution is mixed with a sulfur hydrogenated metallic solution, reaction is performed after air is led, and a compound with a structure shown by a formula (II); (C) thiourea and a water-soluble solvent are mixed, a catalyst is added, then the compound with the structure shown by the formula (II) is added, cooling is performed after first reaction, the obtained product is mixed with an alkaline solution, and the cyclic sulfide with a structure shown by a formula (I) is obtained after second reaction. This application also provides a preparation of sulfur compounds, the difference is that step C). The difference of the cyclic sulfide preparation method is the step (C). The cyclic sulfide prepared by means of the cyclic sulfide preparation method is short in reaction time, high in reaction efficiency and high in yield and content.

Description

technical field [0001] The invention relates to the technical field of monomer compounds, in particular to a preparation method of episulfide compounds. Background technique [0002] Plastic materials are light, tough, and easy to dye, so they are widely used in various optical materials, especially eyeglass lenses, in recent years. For the properties required by optical materials, especially spectacle lenses, in terms of physical properties, low specific gravity, high transparency, high heat resistance, high strength, etc. are required, and in terms of optical properties, high refractive index and high Abbe number are required , the high refractive index makes it possible to thin the lens, and the high Abbe number reduces the chromatic aberration of the lens. In recent years, plastics formed by polymerization of episulfide compounds have characteristics of high refractive index, high Abbe number, high heat resistance, and high strength, and thus are used as materials with ...

AI Technical Summary

Problems solved by technology

Secondly, when using this method to manufacture episulfide compounds, the high reactivity of episulfide compounds will cause the formation of polymers, and then the reaction between episulfide compounds and thiating agents will occur, so it is difficult to obtain episulfide compounds in high yield. The problem

In addition, the reaction between epoxy compounds and thiating agents is slow, so the reaction time is long, and improvement in production efficiency is also required.

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