摘要:
There is disclosed lubricant additives that comprise combination of vegetable oil as a triglyceride or a wax ester, sulfurized triglyceride vegetable oil or sulfurized wax ester of vegetable oil, and phosphite adducts of triglyceride vegetable oil, wax ester of vegetable oil or jojoba oil. There is also disclosed a process for sulfurizing triglyceride vegetable oil that is soluble in a lubricant base, such as mineral oil.
摘要:
This invention generally relates to new polyol ester derivatives of polyamines for use as dispersant additives compatible in synthetic ester-based turbo oils. The dispersant additives of the present invention consist of a hydrocarbon acid, a polyol, an amine carrier such as diacid or cyclic anhydride and a polyamine. The hydrocarbon acid makes up the non-polar hydrocarbon portion of the dispersant and the polyamine functions as the polar headgroup. The diacid or cyclic anhydride provides a means for attaching the polar polyamine to the dispersant structure through an amide linkage. Different dispersant structures are obtained by varying the hydrocarbon acid, the polyol and the nature of the polyamine.
摘要:
A turbine oil used in a turbine of a jet engine, containing: a base oil (A) containing a polyol ester (A1); an antioxidant (B) containing an amine-based antioxidant (B1); a polymethacrylate (C) having a weight average molecular weight of 50,000 to 600,000; and an alkyl aromatic compound (D), having a content of the component (D) of 1,000 parts by mass or less per 100 parts by mass of a total resin content of the component (C), and satisfying the following requirements (1) and (2): requirement (1): a viscosity index of 140 or more; and requirement (2): a coking amount attached to a panel of 80 mg or less after a panel coking test under the prescribed condition. The turbine oil has a high viscosity index to such an extent that an oil film can be retained in the use under a high temperature environment as in a turbine of a jet engine mounted on an aircraft, and is excellent in low temperature viscosity characteristics while retaining excellent heat resistance.
摘要:
A dry film, low coefficient of friction lubricant for titanium pieces is prepared by mixing together solid lubricant particles, poly(tetrafluoroethylene), a suspending agent, and a curable resin in an evaporable carrier. The mixture is applied to titanium or titanium alloy surfaces that contact each other in service. The carrier is evaporated during a subsequent thermal cure, leaving a lubricating film on the surfaces.
摘要:
The present invention relates, generally, to a high temperature stable mixed polyol ester lubricant composition partly containing an aromatic carboxylic acid ester and a process of making the same. Typically, the aromatic acid ester is benzoic acid, and the lubricant composition preferably comprises a mixture of linear C5, i-C9, and linear C7-10 aliphatic carboxylic acid. The esters are preferably formed from an aliphatic polyol. These mixed polyol esters are useful in aero-derived gas turbine engines.
摘要:
A synthetic ester base stock having reduced deposit formation which comprises the reaction product of technical pentaerythritol and a mixture of carboxylic acids. The mixture of carboxylic acids comprises (1) at least one C.sub.8 -C.sub.10 carboxylic acid having 6 or less reactive hydrogens, (2) at least one C.sub.5 -C.sub.7 carboxylic acid having 6 or less reactive hydrogens and (3) at least one C.sub.6 -C.sub.10 carboxylic acid having 6 or more reactive hydrogens.
摘要:
The invention relates to the use of an oil that does not include tricresyl phosphate and includes as an anti-wear additive at least one diphosphorus compound for the prophylaxis of aerotoxic syndrome, especially in case of fume event. It also relates to the oil as such.
摘要:
A carboxylic ester of the formula in which A is —(CH2)x— where x=1.10, a process for its preparation which esters are useful lubricated and plasticizers for high molecular polymeric thermoplastics.
摘要:
A synthetic ester composition which exhibits thermal and oxidative stability, lower friction coefficient and lower wear, wherein the ester composition comprises the reaction product of: a linear or branched alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and at least one linear and/or branched acid which has a carbon number in the range between about C.sub.4 to C.sub.20, wherein the synthetic ester composition has a hydroxyl number of between about greater than 5 to 180, preferably between about greater than 5 to 100, and more preferably between about 10 to 80.
摘要:
The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of an alkyl substituted hydroxy aromatic compound with formaldehyde and an amine, wherein the alkyl-moiety of the aromatic compounds is derived from at least one ethylene alpha-olefin copolymer of 300 to 20,000 number average molecular weight, wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as dispersants.