- HOLOGRAPHIC RECORDING MATERIALS AND METHODS OF MAKING THE SAME
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Provided herein are compositions suitable for recording holograms containing thiol and/or thioether functionality, and optionally including additional allyl and/or propargyl functional groups. These monomers can be used to synthesize holographic polymers having high Δn values. Also provided herein are methods of making holographic polymers and methods recording holograms using these polymers.
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Page/Page column 28-30
(2021/12/31)
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- METHOD FOR PRODUCING POLYTHIOL COMPOSITION, POLYTHIOL COMPOSITION AND APPLICATION OF THE SAME
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PROBLEM TO BE SOLVED: To provide a method for producing a polythiol composition which can improve nitrogen load of waste water, suppresses production of a nitrogen-containing compound that is an impurity with a simple method, and enables production of a polymerizable composition for an optical material excellent in pot life and a polythiourethane-based resin excellent in hue. SOLUTION: A method for producing a polythiol composition includes: a step a of reacting a polyhalogen compound or a polyol compound and thiourea with an acid, to obtain (poly)isothiuronium; and a step b of decomposing the (poly)isothiuronium in the presence of sodium hydroxide, to obtain a composition containing a polythiol compound. A ratio ((b-c)/a) of a molar number b of the sodium hydroxide that is an excess to a molar number c of the acid to a molar number a of a halogen atom of the polyhalogen compound or a hydroxyl group of the polyol compound is 0.10 to 1.00. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
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Paragraph 0068; 0078-0079
(2021/09/01)
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- METHOD FOR PRODUCING POLYTHIOL COMPOUND, METHOD FOR PRODUCING CURABLE COMPOSITION, AND METHOD FOR PRODUCING CURED PRODUCT
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A method for producing a polythiol compound includes reacting a polyol compound with thiourea in which a content of ammonium thiocyanate is 0.05% by mass or less to obtain an isothiuronium salt.
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Paragraph 0106-0107
(2020/12/13)
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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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Paragraph 0082
(2019/03/08)
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- PRODUCTION METHOD FOR POLYTHIOL COMPOUND, POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIAL AND USE THEREFOR
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Provided is a method for producing a polythiol compound, comprising: a step for reacting 2-mercaptoethanol with an epihalohydrin compound represented by the following formula (1) at a temperature of 10°C to 50°C to obtain a polyalcohol compound represented by the following formula (2); a step for reacting the polyalcohol compound thus obtained with thiourea in the presence of hydrogen chloride to obtain an isothiuronium salt; a step for adding, while maintaining a reaction solution containing the isothiuronium salt thus obtained at a temperature of 15°C to 60°C, aqueous ammonia to the reaction solution within 80 minutes, thereby hydrolyzing the isothiuronium salt to obtain a polythiol compound represented by the following formula (5) ; and a step for adding hydrochloric acid which is a concentration of 25% to 36% to the solution containing the polythiol compound thus obtained, washing the solution at a temperature of 10°C to 50°C to purify the polythiol compound.
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Paragraph 0091
(2015/03/18)
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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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