Patent ID: 8373011

Claim:
A lubricant composition, comprising: (a) a saturated aliphatic hydrocarbon compound represented by formula (1): where R 61 to R 64 each represent independently a hydrogen atom or a linear or branched alkyl group having 1 to 16 carbon atoms, and the total number of carbon atoms in R 61 to R 64 is an integer of 4 to 64; and/or (b) a saturated aliphatic hydrocarbon compound represented by formula (2): where R 69 is a linear or branched alkyl group having 4 to 6 carbon atoms, R 70 and R 71 each represent independently a hydrogen atom or a liner or branched alkyl group having 1 to 16 carbon atoms, and the total number of carbon atoms in R 69 to R 71 is an integer of 3 to 48; wherein the saturated aliphatic hydrocarbon compound contains 11-methyl-11,13-dioctyl tricosane in an amount of 55% by mass or more, wherein the saturated aliphatic hydrocarbon compound contains 92.5% or more by mass of hydrocarbon with 40 carbon atoms, and wherein the content of 11-methyl-11,13 dioctyl tricosane occupied in the hydrocarbon product with 40 carbon atoms is 75% or more by mass; wherein said saturated aliphatic hydrocarbon compound of formula (1) is prepared using an α-olefin as a raw material by a process comprising: (I) producing a vinylidene olefin by dimerizing the α-olefin in a presence of a metallocene complex catalyst; (II) further dimerizing the vinylidene olefin in a presence of an acid catalyst; and (III) hydrogenating a dimer obtained by the step (II); and (c) at least one member selected from an antioxidant, an oiliness agent, an extreme pressure agent, a detergent-dispersant, a viscosity index improver, a rust preventing agent, a metal deactivator, and an defoaming agent.