This disclosure relates to ester compounds derived from neo-acids, lubricating oil base stocks comprising such ester compounds, lubricating oil compositions comprising such ester compounds, and method for making such compounds and/or base stocks. The lubricating oil base stocks comprising the ester compounds exhibit desirable lubricating properties such as polarity and oxidation stability.

The present invention relates to a method for preparing nanoparticle of active ingredient using lipid as lubricant in milling process, and more specifically, it relates to a method for preparing active ingredient into nanoparticle, which can be properly used in drugs, cosmetics, functional foods, etc., by pulverizing a mixture comprising the active ingredient and a lipid as a lubricant, and a biocompatible polymer having a glass transition temperature of 80 C. or higher by roll mill, and then removing the lipid used as a lubricant therefrom by using supercritical fluid.

A composition including one or more monomethyl ester compounds represented by the formula: ##STR00001##
R.sub.1 is a monomethyl branched C.sub.15 to C.sub.19 alkyl group and R.sub.2 is an unsubstituted C.sub.2 to C.sub.30 linear alkyl group. The composition has a viscosity (Kv.sub.100) from 1 cSt to 10 cSt at 100 C. as determined by ASTM D445, a viscosity index (VI) from 100 to 300 as determined by ASTM D2270, a pour point from 0 C. to 50 C. as determined by ASTM D97, and a Noack volatility of no greater than 50 percent as determined by ASTM D5800. A process for producing the composition, a lubricating oil base stock and lubricating oil containing the composition, and a method for improving one or more of cold flow properties, thermal and oxidative stability, solubility and dispersancy of polar additives, deposit control and traction control in a lubricating oil by using as the lubricating oil a formulated oil containing the composition.

The invention relates to the use of at least one triazole compound as an additive for improving the anti-corrosion properties of a lubricant composition for a propulsion system of an electric or hybrid vehicle, said lubricant composition comprising one or more amino and/or sulfur anti-wear additives. The invention also relates to the use of a lubricant composition for lubricating a propulsion system of an electric or hybrid vehicle.

Provided is a composition for a refrigeration machine capable of reducing a friction coefficient in friction between sliding members in a refrigeration machine, and a composition kit for a refrigeration machine for providing the composition for a refrigeration machine. A composition for a refrigeration machine of the present disclosure includes a refrigeration machine oil, nanodiamond particles dispersed in the refrigeration machine oil, and a dispersant. The refrigeration machine oil preferably contains a polyvinyl ether, a polyol ester, a polyalkylene glycol, an alkylbenzene, or a mineral oil. The composition kit for a refrigeration machine of the present disclosure includes a refrigeration machine oil (A) containing a base oil and nanodiamond particles dispersed in the base oil, and a refrigerant (B).

The present disclosure provides a lithium complex grease with high-temperature resistivity and a method of making the same. The lithium complex grease includes: a lithium complex thickener, a friction modifier, a polymer or copolymer, and at least one synthetic base oil with alkylated naphthalene. The lithium complex grease can be substantially free of polytetrafluoroethylene. Furthermore, the lithium complex grease can have a median failure rate with via ball bearing test (e.g., using the FE9 grease life test method of DIN 51 821) performed at 160 C. of no less than 100 hours.

This disclosure relates to ester compounds formed from gamma-branched aliphatic alcohols, lubricating oil base stocks comprising such ester compounds, lubricating oil compositions comprising such ester compounds, and method of making such base stocks. The lubricating oil base stocks comprising the ester compounds exhibit desirable lubricating properties such as polarity.

The present invention provides a grease composition including a thickener and a base oil, in which the thickener is a urea compound represented by the following formula (1)

R.sup.1NHCONHR.sup.2NHCONHR.sup.3 (1) wherein R.sup.2 represents a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R.sup.1 and R.sup.3 may be the same or different and each represent an alkyl group having 8 to 22 carbon atoms, a cyclohexyl group, or an aryl group having 6 to 12 carbon atoms, and as the base oil, one or more types of a compound represented by the following formula (2) are contained at 40% by mass or more relative to a total mass of the base oil

##STR00001## wherein R.sup.4 and R.sup.5 may be the same or different and each represent a linear or branched alkyl group having 10 to 26 carbon atoms, where m and n are real numbers being 0 or more which satisfy m+n=2.

The present invention relates to lubricant compositions for motorcycle engines where the crankcase lubricant is also used to lubricate a wet clutch. The lubricant compositions contain antimony dithiocarbamates in combination with one or more ash-free friction modifiers.

The invention refers to use of lubricant compositions comprising a specific diester and additives to reduce the fuel consumption of an engine.