Cold preserving agent and preparation method thereof
A cold-preserving agent and mass-part technology, applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems of low freezing point temperature, strict storage environment, short rewarming time, etc., achieve low freezing point temperature, simple and quick preparation Effect
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Embodiment 1
[0020] Under the condition of a temperature of 24 degrees, 180 grams of bentonite with a particle size of 100 to 120 meshes was first wetted with water in a mixer, and then stirred evenly. Then, 800 grams of sodium polyacrylate diluted with water was mixed with the wetted bentonite. Then, add 410 grams of glycerin, 410 grams of absolute ethanol and a salt solution that contains 100 grams of table salt diluted with water. Continue to stir until the raw material becomes a paste, add 400 grams of styrene-butadiene emulsion with a concentration of 40 wt%, and stir. Finally, 100 grams of bamboo charcoal with a particle size of 80 to 150 meshes was added, fully stirred until uniform, and the cooling agent A was obtained. The total amount of water used in the whole process is 980 grams.
[0021] Store the cooling agent A in the refrigerator, cool to -20 degrees, take out the cooling agent A from the refrigerator and pack it with a flexible packaging bag. Apply the packaged cold-pr...
Embodiment 2
[0023] Under the condition of a temperature of 23 degrees, 150 grams of bentonite with a particle size of 80 to 150 meshes was first wetted with water in a mixer, and then stirred evenly. Then, 900 grams of sodium polyacrylate diluted with water was mixed with the wetted bentonite. Then, add 380 grams of glycerin, 400 grams of absolute ethanol and a salt solution diluted with water containing 80 grams of table salt. Continue to stir until the raw material becomes a paste, then add 380 grams of styrene-butadiene emulsion with a concentration of 40 wt%, and stir. Finally, 80 grams of bamboo charcoal with a particle size of 80 to 150 meshes was added, fully stirred until uniform, and the cooling agent B was obtained. The total amount of water used in the whole process is 950 grams.
[0024] Store the cryogenic agent B in the refrigerator, cool to -20°C, take out the cryogenic agent A from the refrigerator and pack it in a flexible packaging bag. Apply the packaged cold-preserv...
Embodiment 3
[0026] Under the condition of a temperature of 23 degrees, 200 grams of bentonite with a particle size of 80 to 150 meshes was first wetted with water in a mixer, and then stirred evenly. Then, 950 grams of sodium polyacrylate diluted with water was mixed with the wetted bentonite. Then, add 420 grams of glycerin, 430 grams of absolute ethanol and a salt solution diluted with water containing 120 grams of table salt. Continue to stir until the raw material becomes a paste, add 420 grams of styrene-butadiene emulsion with a concentration of 40 wt%, and stir. Finally, 140 grams of bamboo charcoal with a particle size of 80 to 150 meshes was added, fully stirred until uniform, and the cooling agent C was obtained. The total amount of water used in the whole process is 1100 grams.
[0027] Store the cooling agent C in the refrigerator and cool it down to -20°C, take out the cooling agent A from the refrigerator and pack it in a flexible packaging bag. Apply the packaged cold-pr...
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