Synthesis method and application of a kind of polymer cationic bleach activator
A bleach activator, cationic technology, applied in the synthesis field of polymer cationic bleach activator, can solve the problems of low bleaching efficiency, poor water solubility, limited application, etc., achieves good water solubility, strong affinity, and reduces organic solvents. the effect of using
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Embodiment 1
[0026] Add 0.02mol caprolactam into a 250mL three-neck flask filled with 0.03mol sodium carbonate and 25mL toluene, and heat to reflux under nitrogen protection. 5 mL of toluene solution dissolved with 0.02 mol of 4-chloromethylbenzoyl chloride was added dropwise to the reaction solution, and heated to reflux for 4 hours. The reaction solution was washed with a cold toluene solution, dried over anhydrous sodium sulfate, and the reaction solvent was removed to obtain 4-chloromethylbenzoyl caprolactam. 4-Chloromethylbenzoyl caprolactam was added to 25 mL of water, heated to reflux with stirring, and then 5 mL of an aqueous solution in which 0.04 mol of 2-(dimethylamino)ethyl methacrylate was dissolved was slowly added and reacted for 6 hours. After the reaction was completed, the solvent was removed by evaporation. The obtained product was washed with hot acetone and suction filtered to obtain a white solid which was the desired monomer with a yield of 94%. 1 g of the monomer ...
Embodiment 2
[0028] Add 0.02mol of butyrolactam into a 250mL three-neck flask filled with 0.03mol of sodium carbonate and 25mL of toluene, and heat to reflux under nitrogen protection. 5 mL of toluene solution dissolved with 0.02 mol of 4-chloromethylbenzoyl chloride was added dropwise to the reaction solution, and heated to reflux for 3 hours. The reaction solution was washed with a cold toluene solution, dried over anhydrous sodium sulfate, and the reaction solvent was removed to obtain 4-chloromethylbenzoyl butyrolactam. 4-Chloromethylbenzoyl butyrolactam was dissolved in 25mL of water, heated to reflux with stirring, and then 5mL of 2-(dimethylamino)ethyl ethyl acrylate dissolved in 5mL of aqueous solution was slowly added and reacted for 7 hours . After the reaction was completed, the solvent was removed by evaporation. The obtained product was washed with acetone and suction filtered to obtain a white solid which was the desired monomer with a yield of 92%. 1 g of the monomer and ...
Embodiment 3
[0030] Add 0.02mol valerolactam into a 250mL three-necked flask filled with 0.03mol sodium carbonate and 25mL toluene, and heat to reflux under nitrogen protection. 5 mL of toluene solution dissolved with 0.02 mol of 4-chloromethylbenzoyl chloride was added dropwise to the reaction solution, and heated to reflux for 4 hours. The reaction solution was washed with cold toluene solution, dried over anhydrous sodium sulfate, and the reaction solvent was removed to obtain 4-chloromethylbenzoyl butyrolactam. 4-Chloromethylbenzoyl valerolactam was dissolved in 25mL of water, heated to reflux with stirring, then 5mL of 0.04mol 2-(dimethylamino)methyl methacrylate dissolved in an aqueous solution was slowly added, and reacted for 6 hours . After the reaction was completed, the solvent was removed by evaporation. The obtained product was washed with acetone and suction filtered to obtain a white solid which was the desired monomer with a yield of 90%. 1 g of the monomer and 10 mg of ...
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