Fluorine-containing polymer processing aid and preparation method thereof
A technology of processing aids and fluorocarbon polymers, which is applied in the field of fluoropolymer processing aids and its preparation, can solve the problems of lowering and modifying processing aids, the use of temperature restrictions, more organic solvents, and more waste water, etc., to avoid Electric breakdown phenomenon, high temperature resistance level, low pollution effect
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Embodiment 1
[0036] Add 6 grams of silane coupling agent A-172, concentrated hydrochloric acid, and 3 ml of deionized water into a 250 ml three-neck flask equipped with a thermometer, reflux device and stirring device. The pH value of the reaction solution is 2, and quickly drop 15 grams of Surface treatment of the nano-silicon, then start stirring, dropwise add 50 grams of poly FKM concentrated dispersion (FKM emulsion L636, 30% solid content, purchased from Solvay Solexis S.P.A) in 1 hour, after 1 hour, add 50ml toluene to extract After 1 hour, the reaction solution was poured into a separatory funnel for stratification, the water layer was partitioned, the oil layer was washed to neutrality, and after distilling and drying to remove toluene, 29.1 grams of white powdery solids were obtained as white microspheres. The weight ratio of the nano-silicon is 60:40, the average particle size is 0.5mm, and the measured hydrogen bond / hydroxyl ratio of nano-silicon is 0.59.
Embodiment 2
[0038] Add 7.2 grams of silane coupling agent KH-570, concentrated hydrochloric acid, and 3 ml of deionized water into a 250 ml three-necked flask equipped with a thermometer, reflux device and stirring device. The pH of the reaction solution is 3, and quickly drop 16 grams of Surface treatment of the nano-silicon, then start stirring, and drop tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer (weight-average molecular weight is 2,000,000) in 1 hour, after 1 hour, add 50ml toluene to extract, 1 After one hour, the reaction solution was poured into a separatory funnel to separate layers, the water layer was partitioned, the oil layer was washed to neutrality, distilled and dried to remove toluene, and 29.1 grams of white powdery solids were obtained as white microspheres, the weight of the core and the shell. The ratio is 50:50, the average particle size is 0.6mm, and the measured hydrogen bond / hydroxyl ratio of nano-silicon is 0.73.
Embodiment 3
[0040]Add 8.3 grams of silane coupling agent KH-560, concentrated hydrochloric acid, and 3 ml of deionized water into a 250 ml three-neck flask equipped with a thermometer, reflux device and stirring device. The pH value of the reaction solution is 5, and quickly drop 20 grams of Surface treatment of nano-silicon, then start stirring, dropwise add 35 grams of poly FKM concentrated dispersion (FKM emulsion L636, 30% solid content, purchased from Solvay Solexis S.P.A) in 1 hour, after 1 hour, add 50ml toluene to extract After 1 hour, the reaction solution was poured into a separatory funnel for stratification, the water layer was partitioned, the oil layer was washed to neutrality, and 29.1 grams of white powdery solids were obtained after distilling and drying to remove toluene, which were white microspheres, the core and the shell The weight ratio of the part is 40:60, the average particle size is 0.73mm, and the measured hydrogen bond / hydroxyl ratio of nano-silicon is 0.82.
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