- METHOD OF PRODUCING ORGANIC MERCAPTO COMPOUND
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PROBLEM TO BE SOLVED: To provide a method of producing an organic mercapto compound using guanylthiourea as a thiating agent. SOLUTION: A method of producing an organic mercapto compound represented by general formula (4), Q3-(SH)n, comprises reacting an alcohol compound represented by general formula (1), Q1-(OH)n, with guanylthiourea represented by chemical formula (2), NH2-C(=S)-NH-C(=NH)-NH2, under an acidic condition, and then hydrolyzing the reaction product. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
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Paragraph 0098
(2020/10/21)
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- THIOL COMPOUND PRODUCTION METHOD AND NOVEL THIATING AGENT
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PROBLEM TO BE SOLVED: To provide: a thiol compound production method which allows selective production of a thiol compound of interest, inhibits production of by-products ending up wastes, is excellent in production efficiency, and can reduce production costs; and a novel thiating agent used for the method. SOLUTION: The thiol compound production method comprises: a step 1 of preparing a thiuronium salt by reacting at least one compound represented by the general formula (1) defined by R-(X)m with a thiating agent comprising at least one compound selected from compounds represented by the general formula (2) in the figure; and a step 2 of hydrolyzing the thiuronium salt to prepare a compound represented by the general formula (3) defined by R-(SH)m. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
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Paragraph 0071
(2019/12/25)
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- Preparation method of polybasic thiol
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The invention provides a preparation method of polybasic thiol. Bunte salt is directly generated by reaction of thiosulfate and halogenated hydrocarbon, a polybasic thiol compound is prevented from being oxidized, the process has wide adaptability and high yield and is suitable for synthesis of other polybasic thiol compounds, the indexes of the obtained polybasic thiol compounds are qualified through detection, and the chromaticity is 8-9.
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Paragraph 0031; 0035-0036; 0040-0041; 0045
(2019/11/14)
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- (POLY)THIOL COMPOUND PRODUCTION METHOD
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PROBLEM TO BE SOLVED: To provide an ingredient organic chloro compound and a (poly)thiol compound production method that are capable of realizing a (poly)thiol compound of interest with high yields efficiently and inexpensively in a simple manner. SOLUTION: The (poly)thiol compound production method comprises reacting a thiating agent with an organic chloro compound represented by the general formula (1), where one of A1, A2 and A3 is a chlorine atom and the other two are -S-CH2-CH2-Cl groups. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPO&INPIT
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Paragraph 0089-0092
(2019/12/13)
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- METHOD FOR PRODUCING POLYTHIOL COMPOUND, METHOD FOR PRODUCING CURABLE COMPOSITION, AND METHOD FOR PRODUCING CURED PRODUCT
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The method for producing a polythiol compound includes 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; and obtaining 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).
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- PREPARATION METHOD OF HIGH-QUALITY POLYTHIOL
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Embodiments relate to a method for manufacturing high-quality polythiol, wherein a manufacturing method can easily and economically remove impurities in thiourea to manufacture polythiol having constant and excellent quality. The method for manufacturing polythiol of embodiments has a low impurity content, thereby having excellent quality.COPYRIGHT KIPO 2020
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Paragraph 0123-0126; 0160
(2020/02/11)
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- Preparation method of sulfhydryl compound
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The invention provides a preparation method of a sulfhydryl compound. The preparation method comprises the following step of reacting a compound as shown in formula II and hydrogen sulfide at 30-45 degrees centigrade under the action of a catalyst of lithium aluminum hydride to obtain the sulfhydryl compound as shown in formula I. compared with a conventional method, the method for sulfhydrylationof hydrogen sulfide provided by the invention is simple in reaction conditions and low in raw material cost. (The formula is as shown in the specification).
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Paragraph 0011; 0012; 0013; 0014; 0015; 0016
(2019/01/08)
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- POLYTHIOL COMPOUND FOR OPTICAL MATERIAL HAVING HIGH REFRACTIVE INDEX AND PREPARATION METHOD THEREOF
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The present invention relates to a polythiol compound for an optical material having a high refractive index, and a production method thereof. The polythiol compound synthesized by using alkyl halide as a starting material has a high sulfur content, and thus polythiourethane obtained therefrom has optical properties such as a refractive index and Abbe number as well as excellent impact resistance, thereby being able to be produced in optical materials (Glass lens and camera lens).COPYRIGHT KIPO 2017
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Paragraph 0115; 0118-0119
(2017/07/26)
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- POLYTHIOL COMPOSITION AND METHOD FOR PRODUCING SAME
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The present invention provides a polythiol composition containing, as the main component, a polythiol compound (a) having two or more mercapto groups, and containing 0.5% by mass or less of a nitrogen-containing compound (b) in which at least one mercapto group in the polythiol compound (a) is substituted with a group represented by formula (1).
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Paragraph 0042-0043
(2017/09/13)
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- Polyurethane type high-refraction optical resin monomer containing sulfur and preparation method of polyurethane type high-refraction optical resin monomer
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The invention relates to a polyurethane type high-refraction optical resin monomer containing sulfur and a preparation method of the polyurethane type high-refraction optical resin monomer. The preparation method includes: using mercaptoethanol as the raw material to synthesize a 2, 3-dimercapto ethyl sulfo-propanethiol monomer through sulfo-polyol and sulfo-polymercaptan, and allowing the 2, 3-dimercapto ethyl sulfo-propanethiol monomer to have a polymerization addition reaction with isocyanate to prepare an optical resin lens with high refraction rate and high light transmittance.The polyurethane type optical resin monomer prepared by the method is high in purity, and the monomer and the lens are high in refraction rate, high in light transmittance, and the like. The light transmittance of the monomer is not smaller than 89%, the refraction rate of the monomer is not smaller than 1.66, the abbe number of the monomer is not smaller than 31, and the yellow index of the monomer is not larger than 0.8. The light transmittance of the lens is not smaller than 90%, the refraction rate of the lens is not smaller than 1.67, the yellow index of the lens is not larger than 1.55, and the surface hardness of the lens is 2H.
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Paragraph 0039
(2016/11/17)
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- Preparation method of sulfhydryl compound
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The invention provides a preparation method of a sulfhydryl compound. The preparation method comprises the following steps of under the action of a catalyst, making a compound as indicated in the formula II react with hydrogen sulfide under the action of lithium aluminium hydride at the temperature of 30-45 DEG C, and obtaining the sulfhydryl compound as indicated in the formula I. Compared with a traditional method, the method for sulfhydrylating hydrogen sulfide is simple in reaction condition and low in raw material cost. The formula II and the formula I can be found in the specification.
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Paragraph 0013
(2016/10/07)
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- POLYTHIOL COMPOUND AND METHOD FOR PRODUCING SAME
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According to the present invention, a polythiol compound having a total nitrogen content of 50 to 600 ppm inclusive can be provided. According to the present invention, a method for producing the polythiol compound can also be provided, said method being characterized by comprising the steps of: reacting a polyalcohol with thiourea to prepare a thiuronium salt; and adding at least one base selected from the group consisting of hydrazine (hydrate), ammonia and an amine and an inorganic base (that is different from hydrazine (hydrate) or ammonia) to the thiuronium salt in the presence of an organic solvent to hydrolyze the thiuronium salt.
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Paragraph 0050-0052
(2016/09/12)
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- METHOD FOR PRODUCING POLYTHIOL COMPOUND FOR OPTICAL MATERIALS AND COMPOSITION COMPRISING SAME FOR OPTICAL MATERIALS
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The present invention relates to a polythiol compound for a high quality optical material that exhibits excellent physical properties in terms of color, a composition for an optical material including the polythiol compound, a method for producing an optical material, and a method for preparing the polythiol compound. The method includes reacting an epichlorohydrin compound containing 0.5% by weight or less of impurities with 2-mercaptoethanol. The polythiol compound is prevented from being colored. The polythiol compound can be used to produce a urethane optical material that is prevented from being colored and has a low yellowness index and a good color. The polythiol compound can be used to produce various optical materials including urethane optical materials. The optical material can be used to manufacture an optical lens having a good color. The optical lens can be used as a spectacle lens, a polarizing lens, a camera lens, or the like.
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Page/Page column
(2015/02/18)
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- POLYTHIOL COMPOSITION, POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIALS, AND USE OF POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIALS
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A polythiol composition according to the present invention includes a polythiol compound (A) having three or more mercapto groups and a nitrogen-containing compound (B) in which one of a mercapto group of the polythiol compound (A) is replaced with a group represented by the following formula (a) and other one of a mercapto group of the polythiol compound (A) is replaced with a hydroxyl group, in which the peak area of the nitrogen-containing compound (B) is equal to or less than 3.0 with respect to the peak area of 100 of the polythiol compound (A) in a high performance liquid chromatography measurement.
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- Abrasion-resistant optical article and process for manufacturing thereof
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Optical article comprising a transparent substrate and an abrasion-resistant layer appended to the at least one surface of said substrate, wherein said abrasion-resistant layer results from the reaction mixture of the following compounds: - a first organo-silane chosen from thiocarbamate-silane matrix precursor containing at least one terminal alkoxysilane group, or hydrolysates thereof, - an inorganic oxide selected from the group consisting of silica, iron, titanium, cerium, zirconium, antimony, zinc, tin oxides, and composite oxides thereof, - a curing catalyst for said thiocarbamate-silane, and - a solvent for said organo-silane. The invention also relates to a process for manufacturing said articles, and to the use of the above-mentioned article for the manufacturing of optic glasses or lenses.
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- METHOD FOR PRODUCING POLYTHIOL COMPOUND FOR OPTICAL MATERIAL AND POLYMERIZABLE COMPOSITION CONTAINING SAME
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Provided is a process for producing a polythiol compound for an optical material, the method includes reacting 2-mercaptoethanol with an epihalohydrin compound to give polyalcohol, and preparing a polythiol compound through the polyalcohol, wherein a content of bis(2-hydroxyethyl) disulfide in the 2-mercaptoethanol is 0.5 wt% or less.
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Page/Page column 8-10
(2009/01/24)
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- PROCESS FOR PRODUCTION OF (POLY)THIOL COMPOUND FOR USE AS OPTICAL MATERIAL, AND POLYMERIZABLE COMPOSITION COMPRISING THE COMPOUND
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Disclosed is a process for producing a (poly)thiol compound fo an optical material. The process comprises reacting an organic (poly)halogen compound or a (poly)alcohol compound with thiourea to produce an isothiuronium salt and hydrolyzing the isothiuronium salt to thereby produce the (poly)thiol compound, wherein the thiourea has a calcium content of not more than 1.0 wt %.
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Page/Page column 7-8
(2009/01/24)
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