Gas-generating agent, and process for producing foamed object using same
A technology of gas generating agent and carbon number, which is applied in the generation of compressed gas, chemical instruments and methods, explosives, etc., and can solve problems such as corrosion and mold pollution
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[0132] The present invention will be described more specifically with reference to Examples and Comparative Examples below, but the present invention is not limited to these Examples at all. In the examples and comparative examples shown below, unless otherwise specified, the structure of the compound used in the gas generating agent is determined by 1 H-NMR and melting point confirmation, the temperature at which the gas generating agent starts to decompose, the gas generation amount, and the evaluation of the ammonia gas generation amount were performed by the following methods, respectively.
[0133]
[0134] Regarding the temperature at which the gas generating agent starts to decompose, using a differential calorimetry-thermogravimetric simultaneous measurement device (EXSTAR6000 manufactured by SII Nanotechnology Co., Ltd.), under the atmosphere, 25°C was set as the starting temperature, and the temperature was raised at a rate of 10°C / min. Next measure. The temperatu...
Synthetic example 1
[0139] (Synthesis example 1) Synthesis of urea iminoacetic acid (5)
[0140]
[0141] Add 1.33 g (12 mmol) of semicarbazide hydrochloride (manufactured by Kanto Chemical Co., Ltd.) and 6 mL of water to a 30 mL eggplant-shaped flask, stir at room temperature using a magnetic stirrer until a uniform solution is formed, and then add a 50% by mass aqueous solution of glyoxylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.) 1.91 g (13 mmol). Immediately after adding glyoxylic acid, a white solid precipitated. After stirring for 1.0 hour, the reaction solution was filtered, washed with water, and vacuum-dried at 50° C. for 17 hours to obtain 1.458 g (11 mmol) of a white solid. use 1 H-NMR analyzes the obtained solid and confirms that it is urea iminoacetic acid (5) ( 1 H-NMR (DMSO-d 6 , 500 MHz, δ: ppm) = 6.6-6.9 (br; 2H), 7.1 (s; 1H), 10.9 (s; 1H)). The molar yield was 92%. In addition, when the melting point of the obtained solid was measured using a micro meltin...
Synthetic example 2
[0142] (Synthesis Example 2) Synthesis of Carbohydrazide Diacetic Acid (8)
[0143]
[0144] 1.07 g (12 mmol) of carbohydrazide (manufactured by Wako Pure Chemical Industries, Ltd.) and 12 mL of water were added to a 30 mL eggplant-shaped flask, stirred at room temperature using a magnetic stirrer until a uniform solution was formed, and then a 50 mass % aqueous solution of glyoxylic acid ( Tokyo Chemical Industry Co., Ltd.) 3.840 g (26 mmol). Immediately after adding glyoxylic acid, a white solid precipitated. After stirring for 1.0 hour, the reaction solution was filtered, washed with water, and vacuum-dried at 50° C. for 17 hours to obtain 2.52 g (11 mmol) of a white solid. use 1 H-NMR analyzes the resulting solid, confirming that it is carbohydrazide diacetic acid (8) ( 1 H-NMR (DMSO-d 6 , 500MHz, δ:ppm) = 7.4(s; 2H), 11.5(s; 2H)). The molar yield was 93%. In addition, when the melting point of the obtained solid was measured using a micro melting point measuring d...
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