US 5,627,146 A · Lubricating oil composition

Abstract

The present invention is directed to providing a lubricating oil composition which contains an alkyl group asymmetric type molydbdenum dithiocarbamate (MoDTC) as an essential component thereof and which exhibits far more excellent lubrication performance than a conventional lubricating oil composition containing an alkyl group symmetric type MoDTC conventional used in the field of lubricating oils. The lubricating oil composition according to the present invention comprises a base oil for a lubricating oil consisting of a mineral oil and/or a synthetic oil and having a viscosity index of at least 115 and a viscosity at 100.degree. C. falling within the range of 2 to 50 cSt, and a specific alkyl group asymmetric type MoDTC as an essential component.

Claims14

Dependent claims

A lubricating oil composition comprising:

a base oil for a lubricating oil consisting of a mineral oil and/or a synthetic oil, having a viscosity index of at least 115, and having a viscosity of 2 to 50 Cst at 100.degree. C.;
and
a molybdenum dithiocarbamate expressed by the following general formula (1) as Component (A) :
##STR21## wherein both R.sup.1 and R.sup.2 each represent a C.sub.8 to C.sub.13 alkyl group having a branched chain, both R.sup.3 and R.sup.4 each represent a C.sub.8 to C.sub.13 alkyl group having a branched chain and/or a straight chain, with the provision that, R.sup.1 and R.sup.2 are the same, R.sup.3 and R.sup.4 are the same, and R.sup.1 is different from R.sup.3, and X.sup.1 represents a sulfur atom or oxygen atom.

1 more element

Dependencies are inferred from the claim text.

Lubricating oil composition

Life of this patent

Lubricating oil composition

Life of this patent

Abstract

Claims14