The invention relates to superstrong extreme pressure antiwear lubricating
grease and a preparation method thereof; particularly, a densifier is generated by
calcium sulfonate with a high
base number through a
phase inversion reaction, and the lubricating
grease is prepared by combining
base oil with other functional additives, wherein the
base oil is combined by
base oil with high
viscosity and
medium viscosity. The method comprises the following steps: stirring and mixing the composite base oil and the
calcium sulfonate in a reaction vessel, heating, adding a
phase inversion promoter, glacial
acetic acid, and water, heating and reacting at a constant temperature, adding
calcium hydrate, aliphatic acid and
boric acid after the
phase inversion is completed, reacting at a constant temperature, heating and dehydrating, adding an anti-oxidant, refining, transferring the materials into a blending vessel, adding an eutectic rolling additive and an adhesion improver, dispersing and homogenizing the mixture, filtering, and degassing to obtain the finished product. The lubricating
grease of the invention has excellent water sprinkling resistance, excellent high and low temperature performance, superstrong extreme pressure antiwear performance, excellent pumping performance, outstanding shearing stability, and antirust performance.