A kind of lithium-based lubricating grease with layered potassium magnesium phosphate as additive and preparation method thereof
A lithium-based grease, potassium magnesium phosphate technology, applied in the directions of additives, lubricating compositions, chemical instruments and methods, etc., can solve the problem of no potassium magnesium phosphate, etc., and achieve rich sources, good load-bearing and anti-wear ability, appearance and color. light effect
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Embodiment 1
[0030] Pour 23.3 g of PAO8 into the fat-making kettle, start the agitator, heat up to 80 ° C, put in 30.0 g of 12-hydroxystearic acid, and wait until the 12-hydroxystearic acid is completely dissolved, then add the pre-dissolved hydroxide Lithium solution (containing 0.2 g of lithium hydroxide), the temperature was controlled at 130 °C, and the reaction was carried out for 1 h. After saponification, 23.3 g of PAO8 was added, the temperature was controlled at 220 °C, and the heating was stopped after 10 min. When the temperature drops to 160°C, add 23.3 g of PAO8, and when the system cools down to 100°C, add 0.05 g of diphenylamine, stop stirring, grind evenly with a three-roller machine to obtain basic lithium-based grease A.
[0031] Add 0.475 g of magnesium chloride and 8.7 g of dipotassium hydrogen phosphate as raw materials into a 30 mL polytetrafluoroethylene stainless steel kettle, and react in 15 mL of aqueous solution. Temperature 100 ℃, react for 3 days, filter, wash...
Embodiment 2
[0036] Pour 31.7 g of liquid paraffin into the fat-making kettle, start the agitator, heat up to 70 ° C, add 5.0 g of 12-hydroxystearic acid, and wait until the 12-hydroxystearic acid is completely dissolved, then add the pre-dissolved in water Lithium solution (containing 3.0 g lithium hydroxide), the temperature was controlled at 120 °C, and the reaction was carried out for 5 h. After saponification, 31.7 g of liquid paraffin was added, and the temperature was controlled at 200 °C for 10 min, then the heating was stopped. When the temperature drops to 190°C, add 31.7 g of liquid paraffin, and when the system cools down to 100°C, add 5 g of 2,6-di-tert-butyl-p-cresol, stop stirring, and grind evenly with a three-roller machine to obtain the basic lithium base Grease B.
[0037] Add raw materials 0.36 g magnesium acetate, 0.29 g dipotassium hydrogen phosphate and 2.9 g potassium sulfate into a 30 mL polytetrafluoroethylene stainless steel kettle, and react in 15 mL aqueous so...
Embodiment 3
[0042] Pour 30.0 g of simethicone into the fat-making kettle, start the agitator, heat up to 70 ° C, add 10.0 g of stearic acid, and wait until the stearic acid is completely dissolved, then add the lithium hydroxide solution ( containing lithium hydroxide 0.2 g), the temperature was controlled at 120 °C, and the reaction was carried out for 5 h. After saponification, 30.0 g of simethicone oil was added, and the temperature was controlled at 210 °C for 10 minutes, then the heating was stopped. When the temperature drops to 180°C, add 30.0 g of simethicone oil, and when the system cools down to 100°C, add 0.5 g of phenothiazine, stop stirring, grind evenly with a homogenizer to obtain basic lithium-based grease C.
[0043] Add raw materials 0.475 g magnesium chloride, 3.4 g potassium dihydrogen phosphate and 1.4 g potassium hydroxide into a 30 mL polytetrafluoroethylene stainless steel kettle, and react in 5 mL aqueous solution. Temperature 180 ℃, react for 3 days, filter, was...
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