摘要:
A semi-solid lubricant composition for transmission elements which is excellent in lubricity, antiwear properties, and energy-saving performance, has high reliabilitiy, and is for use as turbine oil, machine tool oil, metal working oil, plastic working oil, cutting oil, compressor oil, vacuum-pump oil, electrical-contact oil, grease, or machine oil; and a mechanical system provided with the composition. The composition, which reduces the wear of sliding parts of a transmission element, comprises: an amide compound having one or two amide groups and forming a three-dimensional network structure; and a liquid base oil ingredient having a dynamic viscosity at 100°C of 25 mm 2 /s or lower and a viscosity index of 120 or higher. The composition contains substantially no ingredients other than the amide compound and liquid base oil ingredient. The mechanical system has a transmission element including sliding parts which are provided with the semi-solid lubricant composition for transmission elements.
摘要:
High oleic acid triglyceride compositions that comprise fatty acid components of at least 75 % oleic acid, less than 10 % diunsaturated fatty acid component; less than 3 % triunsaturated fatty acid component; and less than 8 % saturated fatty acid component; and having the properties of a dielectric strength of at least 35 KV/100 mil gap, a dissipation factor of less than 0.05 % at 25 °C, acidity of less than 0.03 mg KOH/g, electrical conductivity of less than 1 pS/m at 25 °C, a flash point of at least 250 °C and a pour point of at least -15 °C are disclosed. Electrical insulation fluids comprising the triglyceride composition are disclosed. Electrical insulation fluids that comprise the triglyceride composition and a combination of additives are disclosed. Electrical apparatuses comprising the electrical insulation fluids and the use of electrical insulation fluids to provide insulation in electrical apparatuses are disclosed. A process for preparing the high oleic acid triglyceride composition is disclosed.
摘要:
A surface-lubricated metal product, with excellent shapability, comprising a metal having coated on both surfaces, or one surface, thereof an alkali-soluble lubricating film mainly comprising an alkali-soluble polyurethane aqueous composition containing a carboxyl group or a sulfonic acid group within the molecule, and a lubricating function-imparting agent in an amount of 1 to 30 mass% based on the alkali-soluble polyurethane aqueous composition, the film being coated to have a film thickness of 0.5 to 10 mu m and the elastic modulus of the film after coating being 0.5 to 20 GPa at 25 DEG C.
摘要:
The present invention is directed to a composition for use in a combustion engine either as a fuel additive or as an additive for a crankcase lubricant. The composition may include a polyunsaturated aliphatic or alicyclic compound having at least three, but no more than six, double bonds to improve the combustion process by acting as pseudo-catalyst in the combustion reaction. The compo sition may further include a derivative of dihydrobenzo-gamma-pyrane to improve the combustion process by acting as pseudo-catalyst in the combustion reaction. The composition may further include sufactants such as polyethylene glycol and/or one or more polyoxyalkene derivatives of either polypropylene glycol, polyethylene glycol or sorbitol. A media of fatty acid esters is provided to dilute the combustion promoters, surfactants and other ingredients allowing accurate concentrations of these ingredients to be introduced into the fuel chamber.
摘要:
The invention relates to novel compositions of material which can be used as lubricants and pressure transmitting means or for functional liquids and lubricant additives in an advantageous manner. The inventive lubricants represent the reaction product of an electrophilic addition of linear or branched aliphatic or aromatic carboxylic acids, carboxylic acid anhydrides, carboxylic acid halogenides or novel neo acids to the double bonds of fatty acids, the esters thereof and/or other fatty acid derivatives as well as of synthetic esters. The novel class of compounds of synthetic esters on the basis of oleo chemicals can be used in novel environmentally friendly lubricants, pressure transmitting systems, functional liquids and lubricant additives by virtue of the increased oxidation resistance compared with the starting materials and by virtue of the low toxicity thereof.
摘要:
A compressor for use with HFC refrigerant, comprising:
a sealed casing; a motor housed within the sealed casing; compression machinery also housed within the sealed casing, the compression machinery including a cylinder, a roller housed in the cylinder, a blade dividing the inner space between the cylinder and the roller into suction space and discharge space; a blade groove slidably housing the blade therein; the surface accuracy of the blade groove inner surface of at least the suction side of the cylinder blade grooves which compose the sliding members of the said compressor being formed to not more than 1.6s; and an at least tetravalent ester oil for the refrigerating machine oil which lubricates the compression machinery.
摘要:
The present invention concerns a lubricant intended for varnished wires and containing pentaerythritol fatty acid esters, fatty acid methyl esters and solvents or solvent mixtures.
摘要:
Lubricant compositions comprising biodegradable ester base stocks are provided for water-cooled or air-cooled two-cycle engines. Grease compositions comprising biodegradable ester base stocks are provided for a wide variety of machinery including chain saws, truck chassis, and the rail, wheel flanges and switches on the railroads.
摘要:
The present invention resides in a turbo oil composition exhibiting enhanced antioxidancy and resistance to deposit formation, and to a method for achieving that result in turbo oils. The gas turbine lubricating oil of the present invention comprises a major proportion of synthetic polyol ester based base stock including diesters and polyol esters, preferably polyol ester based base stock and a minor proportion of an antioxidant/deposit control additive, specifically a sulfur-containing carboxylic acid (SCCA) derivative. Other conventional additives such as extreme pressure, pour point reduction, oxidative stability, anti-foaming, hydrolytic stability, improved viscosity index performance, anti-wear, and corrosion inhibitor additives and others may also be employed. The use of SCCA derivative produces a turbo oil exhibiting markedly superior oxidation stability and deposit control performance compared to that exhibited by turbo oil without the SCCA derivative.
摘要:
Lubricating oil compositions for two-cycle (two-stroke) engines are described, of three types, comprising by weight (viscosity being kinetic at 100 DEG C) : 1. (a) 30 to 70% of a polyol ester having a viscosity of 9 to 15 cSt, (b) 30 to 70% of a diester having a viscosity of 2 to 5 cSt, (c) 1 to 5% of a polybutene having a molecular weight of 500 to 2,500 and/or 1 to 5% of a polymethacrylate having a molecular weight of 5,000 to 40,000, and (d) 5 to 25% of a dispersant. 2. (a) 30 to 70% of a polyol ester having a viscosity of 4 to 15 cSt, (b) 0 to 35% of a complex ester having a viscosity of 10 to 14 cSt, (c) 10 to 70% of a diester having a viscosity of 2 to 5 cSt, and (d) 5 to 25% of a dispersant. The dispersant (d) is preferably a polyamide; it prevents formation of deposits on the engine. 3. A lubricating base oil contains 5 to 25% of a polyamide type of dispersant and also a neutral calcium sulfonate and a neutral calcium salicylate which together amount to 0.1 to 5% by weight of the composition. The base oil can be a mixture of components (a) to (c) of composition 1 or 2, a mineral oil or a poly- alpha -olefin. The compositions can have other additives, and can be used as a low-oil, e.g. 100:1, mixture with gasoline, and they have good biodegradibility.