Lubricating grease and preparation method thereof
A technology of lubricating grease and lubricating base oil, applied in the field of lubricating grease, can solve the problems of poor dropping point, easy oil separation, affecting use and storage life, etc.
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Embodiment 1
[0034] Raw material components: perfluorooctadecanoic acid (30kg); perfluorosebacic acid (8kg); lithium hydroxide monohydrate (2.8kg); perfluoropolyether base oil (PFPE, viscosity 160mm at 40°C 2 / s, viscosity 18mm at 100°C 2 / s, viscosity index 124, pour point -36°C) (70kg).
[0035] Add 60kg of PFPE oil, 30kg of perfluorooctadecanoic acid and 8kg of perfluorosebacic acid into a reaction kettle with a volume of 150L and equipped with heating, stirring, circulation and cooling, stir, and after the temperature is raised to 100°C, 2.8kg of monohydrate Lithium hydroxide and 10kg of water were slowly added to it, heated to 105°C, drained and saponified for 1 hour, then raised to 215°C, kept at a constant temperature for 5 minutes, added 10kg of PFPE quenching oil, stirred to cool down, homogenized, filtered, degassed, and discharged from the kettle to obtain the finished product. The composition of lubricating grease is: base oil 64.6%, compound thickener 35.4%.
[0036] The phy...
Embodiment 2
[0038] Raw material components: perfluorohexadecanic acid (20kg); trifluoroacetic acid (14kg); calcium hydroxide (5.74kg); perfluoropolyether base oil (PFPE, viscosity 450mm at 40°C 2 / s, viscosity 42mm at 100°C 2 / s, viscosity index 145, pour point -30°C) (70kg).
[0039] Add 60kg of PFPE oil, 20kg of perfluorohexadecanic acid and 14kg of trifluoroacetic acid into a reaction kettle with a volume of 150L and equipped with heating, stirring, circulation and cooling, stir, and after heating up to 70°C, add 5.74kg of calcium hydroxide and Slowly add 20kg of water, raise the temperature to 105°C, drain and saponify for 2 hours, raise the temperature to 180°C, keep the temperature constant for 10 minutes, add 10kg of PFPE quenching oil, stir to cool down, homogenize, filter, degas, and leave the kettle to get the finished product. The composition of lubricating grease is: base oil 65.4%, compound thickener 34.6%.
[0040] The physical and chemical properties of the obtained fat a...
Embodiment 3
[0042] Raw material components: perfluorooctadecanoic acid (15kg); pentafluorobenzoic acid (3.25kg); aluminum isopropoxide (3.4kg); T351 (1kg); MoS 2 (1kg); perfluoropolyether base oil (PFPE, viscosity 450mm at 40°C 2 / s, viscosity 42mm at 100°C 2 / s, viscosity index 145, pour point -30°C) (50kg).
[0043] Add 50kg of PFPE oil, 15kg of fluorooctadecanoic acid, and 3.25kg of pentafluorobenzoic acid into a reaction kettle with a volume of 150L and equipped with heating, stirring, circulation, and cooling. Add aluminum, add 0.2kg of water after 60 minutes of reaction, heat up to 200°C after the water is removed, keep the temperature for 15 minutes, stir and cool down, add 1kg of T351 and 1kg of MoS at 100°C 2 , homogenized, filtered, degassed, and discharged from the kettle to obtain the finished product. The composition of the grease is: base oil 70.5%, compound thickener 26.7%, T351 1.4%, MoS 2 1.4%.
[0044] The physical and chemical properties of the obtained fat are sh...
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