Preparation and application of a kind of hyperbranched organosilicon modified paraffin
An organosilicon and paraffin technology, which is applied in the application field of hyperbranched organosilicon modified paraffin and phosphogypsum waterproofing, can solve the problems of easy water absorption and decreased strength of gypsum blocks, and achieves increased coating effect, excellent waterproof performance, good filling effect
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Embodiment 1
[0038] (1) Weigh 1mol of amino-terminated silicone oil, 2mol of glutaric anhydride, and 120ml of xylene, add them into a four-necked bottle, heat at 80°C, and stir to dissolve. Reflux for 24 hours, and distill off the solvent under reduced pressure to prepare carboxyl-terminated silicone oil.
[0039] (2) Weigh 3 mol of carboxyl-terminated silicone oil prepared in the previous step, 1 mol of triethanolamine, and an appropriate amount of p-toluenesulfonic acid, add them to another four-neck flask and heat at 140°C, and slowly add oxalyl chloride dropwise after depressurizing for 6 hours 3mol, appropriate amount of dichloromethane as solvent, DMF as catalyst, reflux at 80°C for 2h, then add 3mol of diethanolamine, appropriate amount of triethylamine, stir at room temperature for 2h to obtain the first generation hydroxyl-terminated hyperbranched organosilicon polymer.
[0040] (3) Add 6 mol of acrylic acid, appropriate amount of DCC and DMAP to the four-necked flask of the previ...
Embodiment 2
[0044] (1) Weigh 1mol of amino-terminated silicone oil, 2mol of glutaric anhydride, and 120ml of xylene, add them into a four-necked bottle, heat at 80°C, and stir to dissolve. Reflux for 24 hours, and distill off the solvent under reduced pressure to prepare carboxyl-terminated silicone oil.
[0045](2) Weigh 3 mol of carboxyl-terminated silicone oil prepared in the previous step, 1 mol of triethanolamine, and an appropriate amount of p-toluenesulfonic acid, add them to another four-neck flask and heat at 140°C, and slowly add oxalyl chloride dropwise after depressurizing for 6 hours 3mol, appropriate amount of dichloromethane as solvent, DMF as catalyst, reflux at 80°C for 2h, then add 3mol of diethanolamine, appropriate amount of triethylamine, stir at room temperature for 2h, then add 6mol of carboxyl-terminated silicone oil, appropriate amount of p-toluenesulfonic acid to react at 140°C, After decompression reaction for 6 hours, slowly add 6 mol of oxalyl chloride, approp...
Embodiment 3
[0050] (1) Weigh 1mol of amino-terminated silicone oil, 2mol of glutaric anhydride, and 120ml of xylene, add them into a four-necked bottle, heat at 80°C, and stir to dissolve. Reflux for 24 hours, and distill off the solvent under reduced pressure to prepare carboxyl-terminated silicone oil.
[0051] (2) Weigh 3 mol of carboxyl-terminated silicone oil prepared in the previous step, 1 mol of triethanolamine, and an appropriate amount of p-toluenesulfonic acid, add them to another four-neck flask and heat at 140°C, and slowly add oxalyl chloride dropwise after depressurizing for 6 hours 3mol, appropriate amount of dichloromethane as solvent, DMF as catalyst, reflux at 80°C for 2h, then add 3mol of diethanolamine, appropriate amount of triethylamine, stir at room temperature for 2h, then add 6mol of carboxyl-terminated silicone oil, appropriate amount of p-toluenesulfonic acid to react at 140°C, After decompression reaction for 6 hours, slowly add 6 mol of oxalyl chloride, appro...
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