High viscosity index synthetic lubricant compositions
AssigneeMobil Oil Corporation
InventorMargaret M. Wu
Life of this patent
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Abstract
Novel lubricant compositions comprising polyalphaolefins are disclosed having high viscosity indices with low pour point. The compositions are characterized by a uniform molecular structure with low branch ratios. The invention describes a liquid lubricant composition comprising C.sub.30 -C.sub.1300 hydrocarbons, said composition having a branch ratio of less than 0.19, weight average molecular weight between 300 and 45,000 number average molecular weight between 300 and 18,000, molecular weight distribution between 1 an 5 and pour point below -15.degree. C. 1-decene trimer comprising 9-methyl, 11-octylheneicosane and 11-octyldocosane is disclosed.
Claims27
A liquid lubricant composition comprising C.sub.30 -C.sub.1300 hydrocarbons, said composition having a branch ratio of less than 0.19, weight average molecular weight between 300 and 45,000, number average molecular weight between 300 and 18,000, molecular weight distribution between 1 and 5 and pour point below -15.degree. C.
A liquid lubricant hydrocarbon composition comprising the polymeric residue of 1-alkenes taken from the group consisting essentially of linear C.sub.6 -C.sub.20 1-alkenes, said composition having a branch ratio of less than 0.19, weight average molecular weight between 300 and 45,000, number average molecular weight between 300 and 18,000, molecular weight distribution between 1 and 5 and pour point below -15.degree. C.
A liquid lubricant hydrocarbon composition having the recurring polymeric structure ##STR4## where m is 3 to 12 and n is 5 to 500.
A hydrocarbon composition useful as a lubricant comprising a mixture of C.sub.30 alkanes consisting essentially of 9-methyl,11-octylheneicosane and 11-octyldocosane.
A hydrocarbon composition useful as a lubricant comprising C.sub.30 H.sub.62 alkanes having a branch ratio less than 0.19 and pour point below -15.degree. C.
A composition of matter comprising 11-octyldocosane having the structure, ##STR5##
A lubricant composition comprising 11-octyldocosane.
A liquid lubricant composition comprising the product of the oligomerization of C.sub.6 to C.sub.20 alpha-olefin feedstock, or mixtures thereof, under oligomerization conditions in contact with a reduced valence state Group VIB metal catalyst on porous support, said lubricant having a branch ratio less than 0.19, viscosity index greater than 130 and a pour point less than -15.degree. C.
Dependencies are inferred from the claim text.