6478-04-2Relevant academic research and scientific papers
Sulfur-containing epoxy compound and its manufacturing method
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Paragraph 0072; 0073, (2017/07/04)
The invention provides a sulfur-containing epoxy component which is stable and does not generate white turbidness when is stored at room temperature, and a method thereof. To solve the problem, the sulfur-containing epoxy compound is manufactured by using hydrogen sulfide or polythiol compound and epichlorohydrin which has a turbidity value below 1.0ppm while manufacturing 30 mass% methanol solution and the manufacturing method are used.
The resin composition
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Paragraph 0023, (2017/04/28)
PROBLEM TO BE SOLVED: To provide a stable sulfur-containing epoxy compound hardly generating cloudiness during storage at a room temperature and a manufacturing method therefor.SOLUTION: There is provided a manufacturing method of a sulfur-containing epoxy compound using a sulfur-containing epoxy compound represented by the following formula having a turbidity value of 10 ppm or less when making 30 mass% methanol solution after storing in a glass bottle at 25°C under nitrogen atmosphere for 30 days, and epichlorohydrin having the turbidity value of 1.0 ppm or less when making 30 mass% methanol solution, hydrogen sulfide or a polythiol compound as raw materials. In the formula, m represents an integer of 0 to 4 and n represents an integer of 0 or 1.
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
NOVEL METHOD FOR PREPARING POLYTHIOL COMPOUND AND POLYMERIC COMPOSITION FOR OPTICAL MATERIAL COMPRISING SAME
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Paragraph 0027, (2015/04/15)
The present invention relates to novel methods for preparing a polythiol compound for use in an optical material and polymerizable compositions including a polythiol compound prepared by the methods. According to the methods, a polythiol compound with uniform color, high purity and high quality can be prepared at reduced cost. The polymerizable compositions can be used to manufacture clear, transparent optical lenses with good heat resistance and excellent optical properties.
NOVEL METHOD FOR PREPARING POLYTHIOL COMPOUND AND POLYMERIC COMPOSITION FOR OPTICAL MATERIAL COMPRISING SAME
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Paragraph 0041; 0042, (2015/06/03)
The present invention relates to novel methods for preparing a polythiol compound for use in an optical material and polymerizable compositions including a polythiol compound prepared by the methods. According to the methods, a polythiol compound with uniform color, high purity and high quality can be prepared at reduced cost. The polymerizable compositions can be used to manufacture clear, transparent optical lenses with good heat resistance and excellent optical properties.
NOVEL EPISULFIDE COMPOUND AND OPTICAL MATERIAL COMPOSITION
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Paragraph 0086, (2015/09/22)
According to a preferred embodiment of the present invention, with an optical material compound including an episulfide compound represented by formula (1) and an episulfide compound represented by formula (2), it is possible to stably and inexpensively store the episulfide compound represented by formula (2) and also provide an optical material having excellent light resistance (in formula (1), m represents an integer from 0 to 4, and n represents an integer from 0 to 2) (in formula (2), m represents an integer from 0 to 4, and n represents an integer from 0 to 2).
METHOD FOR PRODUCING SULFUR-CONTAINING EPOXY COMPOUND
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Paragraph 0072-0073, (2015/01/06)
An object of the present invention is to provide a method for producing a sulfur-containing epoxy compound producing no scum-like insoluble matter. According to the present invention, a sulfur-containing halohydrin compound is dripped into and reacted with a mixed solvent containing an organic solvent and a basic compound to provide the method for producing the sulfur-containing epoxy compound. According to aspects of the present invention, the organic solvent is at least one type of compound selected from toluene and benzene, the basic compound is at least one type of compound selected from sodium hydroxide, potassium hydroxide and calcium hydroxide, and the reaction temperature is between ?5° C. and 30° C.
METHOD FOR PREPARING THIOEPOXY-BASED OPTICAL MATERIAL AND POLYMERIZABLE COMPOSITION THEREOF
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Paragraph 0030, (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.
RADIOLABELED COMPOUNDS AND METHODS THEREOF
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Page/Page column 194, (2011/12/14)
The present invention relates to radiodiagnostic compounds, methods of making those compounds, and methods of use thereof as imaging agents for preferably a HA serotonin 5-HT1A receptor for use in PET or SPECT, preferably PET. Compositions comprising an imaging-effective amount of radiolabeled compounds are also disclosed. The present invention also relates to non-radiolabeled compounds, methods of making those compounds, and methods of use thereof to treat various neurological and/or psychiatric disorders.
Regio- and enantioselective ring-opening of epoxides with HMDST: A straightforward access to 1,2-mercaptoalcohols
Degl'Innocenti, Alessandro,Capperucci, Antonella,Cerreti, Arianna,Pollicino, Salvatore,Scapecchi, Serena,Malesci, Irene,Castagnoli, Giulio
, p. 3063 - 3066 (2007/10/03)
TBAF-catalyzed reaction of a range of substituted epoxides with hexamethyldisilathiane smoothly affords a direct and simple access to β-mercaptoalcohols in a highly regio- and stereo-selective way. Georg Thieme Verlag Stuttgart.
