Chemistry of hydrocarbon compounds – Product blend – e.g. – composition – etc. – or blending process... – Component of indefinite molecular weight greater than 150
Patent
1989-05-01
1991-04-30
Pal, Asok
Chemistry of hydrocarbon compounds
Product blend, e.g., composition, etc., or blending process...
Component of indefinite molecular weight greater than 150
585 12, 585 18, 585520, 585530, C07C 210, C07C 202
Patent
active
050120204
ABSTRACT:
A novel composition is disclosed that is particularly useful as a lubricant viscosity index improver. The composition comprises branched branched C.sub.30 -C.sub.10000 hydrocarbons that have a branch ratio of less than 0.19 and viscosity at 100.degree. C. between 725 CS and 15,000 cS. The novel compositions comprise the product of the oligomerization of C.sub.6 to C.sub.20 alpha-olefin feedstock, or mixtures thereof, under oligomerization conditions at a temperature between -20.degree. C. and +90.degree. C. in contact with a reduced valence state Group VIB metal catalyst on porous support. The compositions have viscosities at 100.degree. C. between 725 cS and 15,000 cS. 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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Weiss et al., J. Catalysis (1984), vol. 88, pp. 424-430.
Jackson Andrew
Wu Margaret M.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Pal Asok
Speciale Charles J.
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