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Extreme pressure additive for lubricating oil aperfeicoado; lubricant; the composition of oil lubricant; the process aperfeicoado to lubrificacao, and process for preparing a lubricant.
Extreme pressure additive for lubricating oil aperfeicoado; lubricant; the composition of oil lubricant; the process aperfeicoado to lubrificacao, and process for preparing a lubricant.
An extreme-pressure lubricating composition is disclosed comprising an oil of lubricating viscosity having dispersed therein 1 to 60 weight percent of hydrated potassium borate microparticles having a boron-to-potassium ratio of about 2.5 to 4.5 and, optionally, from 0.01 to 5.0 weight percent of an antiwear agent selected from: (a) a zinc dihydrocarbyl dithiophosphate having from 4 to 20 carbons in each hydrocarbyl group; (b) a C1 to C20 ester, C1 to C20 amide, or C1 to C20 amine salt of a dihydrocarbyl dithiophosphoric acid having from 4 to 20 carbons in each hydrocarbyl group; or (c) mixtures thereof.
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