Lubricant composition for intermediate-speed trunk piston-type engine of ship
A technology of lubricating oil composition and cylindrical piston, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve problems such as unfavorable piston and engine cleaning, lubrication, increase in viscosity of lubricating oil, shortening service life of oil products, etc. To achieve excellent antioxidant properties, good high temperature cleaning effect
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[0060] Preparation Example 1-4 of Composite Antioxidant
[0061] Add antioxidants T534, 1035, and methylidene 4426-S into the mixing container in proportion, heat at 60℃-90℃ under normal pressure, and stir for 1 hour to 2 hours to obtain a uniform transparent light yellow viscous liquid. The component A of the invention is a compound antioxidant. The composition ratio (mass fraction) of preparation examples 1-4 of the composite antioxidant is shown in Table 1.
[0062] Table 1
[0063] Serial number
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[0064] Examples 1-5 and Comparative Examples 1, 2, 3-1, 3-2
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[0065] Examples 1-5 are the composition and main properties of the lubricating oil composition for a medium-speed cylindrical piston engine of the present invention. Add each component to a blending container in proportion, heat at 45°C-80°C under normal pressure, and stir for 1 hour to 2 hours to prepare a medium-speed cylindrical piston engine lubricating oil composition with a viscosity grade of SAE 30 of the present invention . In Comparative Examples 1, 2, and 3-1, single-component antioxidants were added, namely T534, 1035, and methylidene 4426-S. In Comparative Examples 3-2, a two-component prepared according to the patent CN100460490C method was added. Compound antioxidants, where Example 1 and Comparative Example 1, Example 2 and Comparative Example 2 have all the same formula composition except for the antioxidant, and Example 3 and Comparative Examples 3-1, 3-2 also have All the same formula composition except for antioxidants. The composition ratios (mass fraction...
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