A kind of spherical polytetrafluoroethylene micropowder wax and preparation method thereof
The technology of polytetrafluoroethylene micropowder and polytetrafluoroethylene is applied in the field of spherical polytetrafluoroethylene micropowder wax and its preparation, and achieves the effects of improving conversion rate, reducing damage, and being beneficial to chemical modification.
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Embodiment 1
[0031] 1) Stir 1000g of PTFE resin and 20g of KH560 evenly, place it in an irradiation box, and irradiate it with high-energy electron beams, and the irradiation dose is 20Mrad;
[0032] 2) Pulverize the irradiated product with a jet mill, then disperse it in acetone, add acetic acid to stir, leave it to stand for stratification, and filter to obtain polytetrafluoroethylene micropowder;
[0033] 3) Disperse 100g of the treated polytetrafluoroethylene micropowder in 500ml of ethylene glycol, add 5g of polyvinylpyrrolidone and ultrasonically disperse it evenly, react with water at 140°C for 5h, wash and dry after treatment to obtain carboxyl-terminated polytetrafluoroethylene micropowder ;
[0034] 4) Add 100g of carboxyl-terminated polytetrafluoroethylene micropowder and 10g of hydroxyethyl methacrylate into the reaction flask, add 500ml of solvent DMF, and disperse it evenly by ultrasonication, then add 2g of dimethylimidazole, and react at 150°C for 8h. Filter and dry after ...
Embodiment 2
[0037] Step 1) Stir 1000g PTFE resin with 40g KH570 evenly, place it in an irradiation box, and use high-energy electron beams to irradiate, and the irradiation dose is 50Mrad;
[0038] 2) Pulverize the irradiated product with a jet mill, then disperse it in acetone, add acetic acid to stir, leave it to stand for stratification, and filter to obtain polytetrafluoroethylene micropowder;
[0039] 3) Disperse 100g of the treated polytetrafluoroethylene micropowder in 500ml of ethylene glycol, add 5g of polyvinylpyrrolidone and ultrasonically disperse it evenly, react with water at 140°C for 5h, wash and dry after treatment to obtain carboxyl-terminated polytetrafluoroethylene micropowder ;
[0040] 4) Add 100g of carboxyl-terminated polytetrafluoroethylene micropowder and 10g of hydroxyethyl methacrylate into the reaction flask, add 500ml of solvent DMF, and disperse it evenly by ultrasonication, then add 2g of dimethylimidazole, and react at 150°C for 8h. Filter and dry after c...
Embodiment 3
[0043] 1) Stir 1000g of PTFE resin and 60g of KH560 evenly, place it in an irradiation box, and irradiate it with high-energy electron beams, and the irradiation dose is 100Mrad;
[0044] 2) Pulverize the irradiated product with a jet mill, then disperse it in acetone, add acetic acid to stir, leave it to stand for stratification, and filter to obtain polytetrafluoroethylene micropowder;
[0045] 3) Disperse 100g of the treated polytetrafluoroethylene micropowder in 500ml of ethylene glycol, add 5g of polyvinylpyrrolidone and ultrasonically disperse it evenly, react with water at 140°C for 5h, wash and dry after treatment to obtain carboxyl-terminated polytetrafluoroethylene micropowder ;
[0046]4) Add 100g of carboxyl-terminated polytetrafluoroethylene micropowder and 10g of hydroxyethyl methacrylate into the reaction flask, add 500ml of solvent DMF, and disperse it evenly by ultrasonication, then add 2g of dimethylimidazole, and react at 150°C for 8h. Filter and dry after ...
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