High elastohydrodynamic shear strength fluid compositions

摘要

A lubrication fluid including cyclic hydrocarbons in combination with dimethylsilicone fluids and/or di-alkyl or di-cycloalkyl or alkyl-cycloalkyl, or mixtures thereof, and di-end-capped polypropylene oxides or highly branched esters to produce very high traction elastohydrodynamic (EHD) traction fluids and to modify the low temperature viscometric properties of the mixed fluids without adversely affecting the very high elastohydrodynamic shear strength or traction coefficients of the very high shear strength cyclic hydrocarbon fluid in the resulting mixed fluids with improved low temperature viscosity.

主权项

1. A lubrication fluid comprising: a polycyclic hydrocarbon fluid and a dimethylsiloxane compound having a viscosity range of 20 cSt at 77° F. to 50 cSt at 77° F. F., wherein said dimethylsiloxane compound is present in an amount ranging from 0.1 wt. % and 25 wt. % based on the lubricating fluid, and said dimethylsiloxane fluid contains not more than 10 wt. % of functional groups other than methyl functional groups, wherein the polycyclic hydrocarbon fluid is a linear perhydro dimer of alpha-methylstyrene.