Quaternary ammonium konjac glucomannan derivatives and their preparation process and use
A konjac glucoside and quaternization technology, applied in cosmetic preparations, cosmetics, cosmetics and other directions, can solve the problems of poor solubility and rheology, unstable aqueous solution, application limitations, etc., and achieve improved moisturizing performance, The effect of low cost and simple preparation process
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Embodiment 1
[0023] Weigh 2 grams of konjac glucosidan powder, prepare an aqueous solution with a concentration of 0.1% (w / w), and place it at 0°C for 2 hours to disperse it evenly, then add 30% (w / w) of hydroxide Sodium aqueous solution 8.2 milliliters (maintain the molar ratio of konjac glucosidan and inorganic base is 1:5), after stirring evenly, alkalize for 1 hour, add 50% (w / w) 3-chloro- 2-Hydroxypropyltrimethylammonium chloride in water. The mixture was vigorously stirred, and the aqueous solution of the quaternizing agent was controlled to be dripped within 1 hour (the molar ratio of sodium hydroxide to the quaternizing agent was controlled to be 1.1:1). In order to prevent konjac glucan from forming insoluble matter, which is not conducive to the reaction. The mixed system was reacted at 0°C for 4 hours. After the reaction, use dilute hydrochloric acid to adjust the pH value to 6-7, and use precipitant acetone to precipitate the crude product of the quaternized ammonium derivati...
Embodiment 2
[0025] Weigh 2 grams of konjac glucosidan powder, prepare an aqueous solution with a concentration of 1% (w / w), and place it at 10°C for 2 hours to make it disperse evenly, then add 30% (w / w) of hydroxide Potassium aqueous solution 23.0 milliliters (maintain the molar ratio of konjac glucosidan and inorganic base is 1: 10), after stirring evenly, basify for 1 hour, add 30% (w / w) 3-chloro- 2-Hydroxypropyltrimethylammonium chloride in water. The mixture was vigorously stirred, and the aqueous solution of the quaternizing agent was controlled to be dripped within 1 hour (the molar ratio of sodium hydroxide to the quaternizing agent was controlled to be 1.1:1). In order to prevent konjac glucan from forming insoluble matter, which is not conducive to the reaction. The mixed system was reacted at 0°C for 4 hours. After the reaction, use dilute hydrochloric acid to adjust the pH value to 6-7, and use precipitant acetone to precipitate the crude product of the quaternized ammonium ...
Embodiment 3
[0027] Weigh 2 grams of konjac glucosidan powder, prepare an aqueous solution with a concentration of 1.5% (w / w), and place it at 30°C for 2 hours to make it disperse evenly, then add 30% (w / w) of hydroxide Sodium aqueous solution 39.5 milliliters (maintain the molar ratio of konjac glucosidan and inorganic base is 1: 24), after stirring evenly, basify for 1 hour, add 10% (w / w) 3-chloro- 2-Hydroxypropyldimethyloctylammonium chloride in water. The mixture was vigorously stirred, and the aqueous solution of the quaternizing agent was controlled to be dripped within 1 hour (the molar ratio of sodium hydroxide to the quaternizing agent was controlled to be 1.2:1). In order to prevent konjac glucan from forming insoluble matter, which is not conducive to the reaction. The mixed system was reacted at 30°C for 16 hours. After the reaction, use dilute hydrochloric acid to adjust the pH value to 6-7, and use precipitant acetone to precipitate the crude product of the quaternized ammo...
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