The present disclosure concerns a lubricant composition including: at least one base oil; and at least two glycerol esters E.sub.1 and E.sub.2, ester E.sub.1 being an ester of glycerol and of a C.sub.12-C.sub.26 carboxylic acid and ester E.sub.2 being an ester of glycerol and of a C.sub.4-C.sub.10 carboxylic acid. The lubricant composition has good friction properties, and the use thereof promotes fuel savings.

The invention provides a refrigerating machine oil comprising as a base oil at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less, and being used in combination with a (Z)-1,1,1,4,4,4-hexafluoro-2-butene refrigerant.

Provided herein are processes for preparing estolides and estolide base oils from fatty acid reactants utilizing catalysts. Further provided herein are processes for preparing carboxylic esters from at least one carboxylic acid reactant and at least one olefin.

Disclosed is a lubricating oil composition comprising an oil of lubricating viscosity and an oil soluble synergistic mixture of antioxidants, said mixture comprising: a) a hindered amine antioxidant according to formula (I)

##STR00001## wherein each R.sup.1 is independently selected from a substituted or unsubstituted, branched or linear, C.sub.1-C.sub.20 hydrocarbyl group; R.sup.2 is selected from the group consisting of a hydrogen atom or a, substituted or unsubstituted, branched or linear, C.sub.1-C.sub.20 hydrocarbyl group; each R.sup.3 is independently selected from the group consisting of a hydrogen atom or a, substituted or unsubstituted, branched or linear, C.sub.1-C.sub.20 hydrocarbyl group; each R.sup.4 is independently selected from the group consisting of a hydrogen atom or a, substituted or unsubstituted, branched or linear, C.sub.1-C.sub.20 hydrocarbyl group; n is an integer from 1 to 4; and m is an integer from 1 to 5; and b) a molybdenum succinimide complex.

Object

Objective is to provide a grease composition for a pivot assembly and a pivot assembly bearing filled with the grease composition, and to provide a bearing apparatus as well as a drive apparatus including the bearing apparatus, which is capable of suppressing adhesion of a volatilized component to a magnetic disk or the like even when the grease composition is volatilized by application of the grease composition and the bearing, thereby suppressing occurrence of read/write errors of an HDD.

Solution

Provided are: a grease composition for a pivot assembly bearing including an aromatic ester-based base oil and a thickener, the aromatic ester-based base oil containing an aromatic ester compound having an ester group *(CO)O as a substituent on a ring, where * is a bonding site to an aromatic ring, and having an alkyl group with a total of 8 or more carbon atoms bonded to an oxygen atom of the ester group; a pivot assembly bearing filled with the grease composition for pivot assembly bearing; a bearing apparatus including the pivot assembly bearing; and a disk drive apparatus equipped with the bearing apparatus.

The present invention generally relates, in certain aspects, to corrosion inhibiting compositions useful for metalworking fluids, as well as concentrates, additives and metalworking fluids containing such compositions. The invention furthermore relates, in some aspects, to the use of such compositions for providing to a metalworking fluid one or more of anticorrosion performance, antifoam performance, antiwear performance, load carrying capacity, long fluid life, biological stability, lubricity, hard water tolerance, formulation stability.

The invention provides a composition comprising a mixture of pentadecanols wherein at least about 60 wt % of the mixture is linear pentadecanol and at least about 10 wt % of the mixture is branched pentadecanols wherein the branched pentadecanols have branching on the second carbon atom. The mixture of pentadecanols may be converted to one or more derivatives, and these derivatives may be used in laundry detergents, cleaning products or as an agricultural adjuvant, an emulsifying agent, a lubricant additive, a pour point depressant, or a personal care ingredient.

The invention provides a composition comprising a mixture of tridecanols wherein at least about 60 wt % of the mixture is linear tridecanol and at least about 10 wt % of the mixture is branched tridecanols wherein the branched tridecanols have branching on the second carbon atom. The mixture of tridecanols may be converted to one or more derivatives, and these derivatives may be used in laundry detergents, cleaning products or as an agricultural adjuvant, an emulsifying agent, a lubricant additive, a pour point depressant, or a personal care ingredient.

Through a lubricating oil additive including an amide compound represented by the following general formula (1) and a lubricating oil composition using the same, a lubricating oil additive and a lubricating oil composition exhibiting not only a high intermetal friction coefficient but also excellent intermetal friction-coefficient/slipping-velocity characteristics are provided.

R.sup.aCO(NH-L.sup.1).sub.n-NR.sup.bR.sup.c (1)

In the formula, R.sup.a is a straight-chain alkyl group having 8 to 22 carbon atoms or a branched-chain alkyl group having 8 to 22 carbon atoms, or a straight-chain alkenyl group having 8 to 22 carbon atoms or a branched-chain alkenyl group having 8 to 22 carbon atoms; L.sup.1 is an alkylene group having 1 to 6 carbon atoms; n is an integer of 1 to 4; and NR.sup.bR.sup.c is a primary amino group or a piperazyl group.

The invention provides a composition comprising a mixture of pentadecanols wherein at least about 60 wt % of the mixture is linear pentadecanol and at least about 10 wt % of the mixture is branched pentadecanols wherein the branched pentadecanols have branching on the second carbon atom. The mixture of pentadecanols may be converted to one or more derivatives, and these derivatives may be used in laundry detergents, cleaning products or as an agricultural adjuvant, an emulsifying agent, a lubricant additive, a pour point depressant, or a personal care ingredient.