Novel vi enhancing compositions and newtonian lube blends

Details Novel vi enhancing compositions and newtonian lube blends Novel vi enhancing compositions and newtonian lube blends

C - Chemistry, Metallurgy

10

M

253/113, 402/556

C10M 143/08 (2006.01) C08F 4/22 (2006.01) C08F 10/14 (2006.01) C10G 50/02 (2006.01) C08F 110/14 (2006.01) C08F 210/14 (2006.01)

Patent

CA 2031492

A novel composition is disclosed that is particularly useful as a lubricant viscosity index improver. The composition comprises branched C30-C10000 hydrocarbons that have a branch ratio of less than 0.19 and viscosity at 100° C between 725 mm2/s and 15,000 mm2/s. The novel compositions comprise the product of the oligomerization of C6 to C20 alpha-olefin feedstock, or mixtures thereof, under oligomerization conditions at a temperature between -20° C and + 90°C in contact with a reduced valence state Group VIB metal catalyst on porous support. The compositions have viscosities at 100°C between 725 mm2/s and 15,000 mm2-/s. Using the foregoing compositions in admixture with mineral oil and synthetic lubricants provides novel lubricant blends that show an elevated viscosity index. The mixtures also show an increased stability to shear stress at high temperature with all blends notable by exhibiting Newtonian flow.

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