摘要:
A lubricating oil composition with improved frictional and wear performance, especially when the ratio of polysulfides is controlled, wherein said composition comprises a major amount of an oil of lubricating viscosity, at least one alkali metal borate; at least one dihydrocarbyl polysulfide component comprising a mixture of sulfides and having at least 30% dihydrocarbyl tetrasulfide or higher sulfides; at least one non-acidic phosphorus component comprised of a trihydrocarbyl phosphite; at least one dihydrocarbyl dithiophosphate; and a phosphorus component comprising a dihydrocarbyl phosphite component is disclosed.
摘要:
A functional fluid comprising a base oil with a high viscosity index, wherein the functional fluid has a kinematic viscosity at 100° C. between 2.5 and 5.0 mm2/s, a low Brookfield viscosity, a high aniline point, and excellent air release. Shock absorber fluids with improved performance, comprising a particular base oil, wherein the improved performance includes high viscosity index, low Brookfield viscosity, high aniline point, excellent air release and high flash point.
摘要:
A process to make a shock absorber fluid having improved performance properties, the properties including an air release after 1 minute by DIN 51381 of less than 0.8 vol %, a kinematic viscosity at 100° C. less than 5 mm2/s and an aniline point greater than or equal to 95° C., or meeting the specifications for Kayaba 0304-050-0002 or VW TL 731 class A. The shock absorber fluid is made by blending a base oil having less than 10 wt % naphthenic carbon and a high viscosity index with low levels of (or no) viscosity index improver and pour point depressant.
摘要:
A process to make a shock absorber fluid having improved performance properties, the properties including an air release after 1 minute by DIN 51381 of less than 0.8 vol %, a kinematic viscosity at 100° C. less than 5 mm2/s and an aniline point greater than or equal to 95° C., or meeting the specifications for Kayaba 0304-050-0002 or VW TL 731 class A. The shock absorber fluid is made by blending a base oil having less than 10 wt % naphthenic carbon and a high viscosity index with low levels of (or no) viscosity index improver and pour point depressant.
摘要:
A manual transmission fluid having a VI greater than 160 and a Brookfield viscosity at −40° C. less than 30,000 cP. It comprises: 1) a base oil (made from a waxy feed) having less than 0.06 wt % aromatics, greater than 5 wt % total molecules with cycloparaffinic functionality, and a ratio of molecules with monocycloparaffinic functionality to molecules with multicycloparaffinic functionality greater than 20; and a manual transmission fluid additive package. In another embodiment, the manual transmission fluid comprises: 1) a base oil having a high VI and a kinematic viscosity at 100° C. greater than 5.5 cSt, 2) less than 0.01 wt % pour point depressant, and 3) a manual transmission fluid additive package. This invention is also directed to a process to make the manual transmission fluid, comprising the steps of hydroisomerization dewaxing, selecting base oil fractions having a high VI, and blending the fractions with an additive package.
摘要:
Provided are power steering fluids made from a waxy feed and with improved low temperature properties, such as, for example, a viscosity index of greater than 290 and a Brookfield Viscosity at −40° C. of less than 1900 mPa·s. In an embodiment, the power steering fluid comprises greater than 50 weight % base oil, viscosity index improver, and less than about 1.0 weight % pour point depressant.
摘要:
A functional fluid comprising a base oil with a high viscosity index, wherein the functional fluid has a kinematic viscosity at 100° C. between 2.5 and 5.0 mm2/s, a low Brookfield viscosity, a high aniline point, and excellent air release. Shock absorber fluids with improved performance, comprising a particular base oil, wherein the improved performance includes high viscosity index, low Brookfield viscosity, high aniline point, excellent air release and high flash point.