The disclosed technology provides a lubricating composition comprising an oil of lubricating viscosity and a detergent comprising a polyolefin-substituted hydroxy-aromatic carboxylic acid or salt thereof, wherein the polyolefin is derived from a branched alkene having at least 4 carbon atoms and wherein the polyolefin has a number average molecular weight of 150 to 800. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.

Lubricant composition, in particular a cooling lubricant solution, based on ionic and/or organoelemental compounds.

A lubricant composition includes a base lubricant and a plurality of lubricant additive molecules functioning as precursor molecules to induce tribopolymerization and forming in situ protective tribofilm with desirable robustness and low shear resistance. Each lubricant additive molecule includes one or more surface-active groups attractable to target surface, and a carbon containing component operable connected to the one or more surface active groups. The carbon containing component comprise a carbon ring structure having a high ring strain that is metastable and activatable with a ring-opening reaction. A less stable carbon ring structure is more readily activated to the intermediate state, preferable to form more active fragments. Increasing the adsorption strength further is beneficial to prolonging the residence time of additive molecules on the target surface, thereby facilitating the dissociation of molecules and subsequent polymerization.

The present invention discloses with the development of ecofriendly and biodegradable lubricant formulation useful for micro electro mechanical systems and process thereof. The new generation Mineral oil free lubricant formulations were developed by esterification of polyols such as 2,2-dimethyl, 1,3-Propanediol, 2,2-diethyl-1,3-propane diol, and aliphatic di carboxylic acids like adipic and azelaic and with mono alcohol, using heterogeneous catalyst Indion 140 with cation exchange properties. The said formulation has a viscosity in the range of 31 to 47 cSt at 40° C., a high viscosity index of 139-196, pour point of approximately <−39° C. with a multifunctional EP additive of recommended dose of 1.5-4%. These new generation lubricants exhibited excellent biodegradability, a high viscosity index, and a low pour point, a high flash point, good lubricity, good oxidative stability, very good protection, against wear, no evaporation loss, good adherence to metal, corrosion inhibiting characteristics and suitability for use with commercial additives. In addition the products are non toxic to the sewage bacteria.

A polyisobutylene-substituted hydroxyaromatic compound and derivatives thereof which are suitable for use as additives in lubricating compositions. The polyisobutylene-substituted hydroxyaromatic compound may include the reaction product of a hydroxyaromatic compound with a polyisobutylene having a number average molecular weight of 150 to 800.

A hydrofluoroolefins-containing refrigerant composition is disclosed. The composition includes the following ingredients in part by weight: 50-90 parts of 2,3,3,3-tetrafluoropropene, 5-30 parts of trans-1,3,3,3-tetrafluoropropene, and 5-20 parts of fluoroethane. The composition of this invention has the advantages of low GWP, environmental friendliness, good refrigeration effect and high compatibility with lubricants.

An environmentally acceptable lubricating grease, comprising: a) 50 wt % to 90 wt % of a biodegradable base oil comprising a biodegradable ester as base oil; b) 3 wt % to 25 wt % of a thickener selected from b1) 3 wt % to 12 wt % biodegradable calcium soap, b2) 3 wt % to 25 wt % bentonites, b3) and mixtures thereof; c) 4 wt % to 40 wt % additives, comprising c1) 1 wt % to 12 wt % fumed silicon dioxide and/or polytetrafluoroethylene and/or mixtures thereof, c2) 2 wt % to 45 wt % of a polymer selected from polyisobutylene, polyisobutylene/butene copolymer, polymethacrylates, polyesters and mixtures thereof, c3) 0.5 wt % to 20 wt % of a solid lubricant.

The disclosed technology relates to hydrocarbyl- (e.g. alkyl-) phenol detergents and their salts, where the hydrocarbyl group includes moieties equivalent to 5 to 10 carbon branched polyene compounds. Such compounds and their salts are useful as lubricant additives.

The present invention describes a process for obtaining a biolubricant from vegetable oil, which comprises the steps of (a) esterification reaction of the product of vegetable oil hydrolysis using a branched aliphatic alcohol; (b) epoxidation reaction of the esters obtained in step (a); and (c) nucleophilic substitution reaction of the epoxidated esters obtained in step (b) using a branched aliphatic alcohol. The present invention also describes a biolubricant obtained from the process. More specifically, a biolubricant is described that is produced from a ricinoleic fatty acid, whose formula is illustrated in FIG. 1 of the present invention, and where R.sub.1 is a hydroxyl or it is from the formula R.sub.3COO.sup.−, with R.sub.3 being an alkyl radical C.sub.1-C.sub.3, preferably a methyl radical; and R.sub.2 consists of a straight chain of hydrocarbons C.sub.4-C.sub.8 and a branched chain of hydrocarbons C.sub.1-C.sub.3.

A hydrofluoroolefins-containing refrigerant composition is disclosed. The composition includes the following ingredients in part by weight: 50-90 parts of 2,3,3,3-tetrafluoropropene, 5-30 parts of trans-1,3,3,3-tetrafluoropropene, and 5-20 parts of fluoroethane. The composition of this invention has the advantages of low GWP, environmental friendliness, good refrigeration effect and high compatibility with lubricants.