98485-71-3Relevant academic research and scientific papers
METHOD FOR PRODUCING (POLY)SULFIDE COMPOUND AND METHOD FOR PRODUCING EPISULFIDE COMPOUND
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Paragraph 0078, (2019/08/21)
PROBLEM TO BE SOLVED: To provide a method for producing (poly)sulfide compound that is excellent in production efficiency and reduced in production cost. SOLUTION: Provided is a method for producing (poly)sulfide compound in which thiol compounds represented by the formula (1) are reacted with each other in the presence of epihalohydrins, one or more selected from M(SH)n, an amine and pyridines, and a sulfur to form (poly)sulfide compound and at the same time by-produced hydrogen sulfide is reacted with the epihalohydrins to form the thiol compound. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
The method for producing an episulfide compound (poly) sulfide compound and method of manufacturing
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Paragraph 0064, (2017/11/09)
In a process for producing a (poly) sulfide compound represented by General Formula (2) of the present invention, thiol compounds represented by General Formula (1) are reacted with each other in the presence of a basic compound represented by General Formula (4) or General Formula (5) and sulfur. €?€?€?€?€?€?€?€?M(SH)n€?€?€?€?€?(4)
Cyclic sulfide preparation method
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Paragraph 0078, (2017/01/17)
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.
Method of Producing Thioepoxy Compound for Optical Material and Polymerizable Composition for Thioepoxy based Optical Material Comprising the Compound
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Paragraph 0063; 0064, (2017/07/04)
The present invention relates to a thioepoxy compound from which a high-quality optical material having a good and clear color and causing no whitening can be obtained, and a polymerizable composition for a thioepoxy-based optical material comprising the same. The present invention provides a method for preparing a thioepoxy compound for an optical material, which uses an epichlorohydrin compound as a starting material, wherein the epichlorohydrin compound has a total content of specific impurities, including acrolein, allyl chloride, 1,2-dichloropropane and 2,3-dichloropropene, of 1 wt% or less. According to the present invention, it is possible to obtain a thioepoxy compound causing less coloration by adjusting the content of specific impurities in the epichlorohydrin compound. In addition, the resultant thioepoxy compound can be used to obtain a high-quality transparent thioepoxy-based optical material having a good color and causing no whitening. The thioepoxy-based optical material according to the present invention is useful for corrective lenses, sunglass lenses, fashion lenses, metachrosis lenses, camera lenses, and lenses for optical devices.COPYRIGHT KIPO 2016
Clean preparation method of episulfides
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Paragraph 0030; 0031, (2016/10/10)
The invention belongs to the technical field of organic synthesis, and particularly relates to a clean preparation method of episulfides. Epoxy compounds I used as a raw material are subjected to solid acid catalysis reaction by using hydrogen sulfide as a thiation reagent, thereby preparing the episulfides. The method has the advantages of mild reaction conditions, low raw material cost and fewer three wastes. The adopted solid acid catalyst can be easily filtered and recovered, and can be reused after being activated.
Optical material for production of (poly) episulfied compd.
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Paragraph 0065, (2016/12/26)
PROBLEM TO BE SOLVED: To provide a method for producing a (poly)episulfide for an optical material in a method for producing a (poly)episulfide by reacting a (poly)epoxy compound with thiourea in which the content of calcium in the thiourea is ≤0.1 wt.%. SOLUTION: The method for producing a (poly)episulfide compound for an optical material is a method for producing a (poly)episulfide by reacting a (poly)epoxy compound with thiourea in which the content of calcium in the thiourea is ≤0.1 wt.%. COPYRIGHT: (C)2012,JPOandINPIT
METHOD FOR PREPARING THIOEPOXY-BASED OPTICAL MATERIAL AND POLYMERIZABLE COMPOSITION THEREOF
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Paragraph 0034, (2014/12/09)
The present invention relates to a thioepoxy compound for an optical material, a polymerizable composition including the thioepoxy compound, and a method for producing a thioepoxy optical material by polymerization of the polymerizable composition. The thioepoxy compound contains 4 to 15% by weight of 2,3-epoxypropyl(2,3-epithiopropyl)sulfide and/or 2,3-epoxypropyl(2,3-epithiopropyl)disulfide. The thioepoxy optical material is free from color instability, demolding, and polymerization imbalance, which are problems encountered in general thioepoxy optical materials.
A polymerizable composition
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, (2008/06/13)
An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above polymerizable composition to which is added primary and/or secondary amines as an yellowing inhibitor in a proportion of 0.001 to 0.5 of the total molar number of NH2and NH groups in the amines to the total molar number of thioepoxy and epoxy groups in the (thio)epoxy compound having at least one intramolecular disulfide bond, can provide a transparent resin in which yellowing and reduction in heat resistance associated therewith are adequately prevented while maintaining a high refractive index.
