Abstract:
A lubricating oil for refrigerating machines which comprises an oxygenic compound as a base oil and which, when incorporated into a chlorine-free C1 refrigerant in an amount in the range of 3 to 50 wt.% based on the sum of these, is compatible therewith in any of the concentrations at a temperature of -10 DEG C or lower; and a hydraulic composition for refrigerating machines which comprises (A) a chlorine-free C1 refrigerant and (B) the lubricating oil. In the composition, the oil has excellent compatibility with the chlorine-free C1 solvent, especially difluoromethane. The composition is excellent in antiwearing properties, lubricating properties, stability, etc.
Abstract:
A refrigerating machine oil composition for carbon dioxide (CO2) refrigerant for use in compression type refrigerating machines such as car air conditioners, refrigerators, freezers, air conditioners, and heat pumps, which comprises a base oil consisting mainly of an oxygenic organic compound and having a dynamic viscosity at 100 DEG C of 5 to 50 mm /s, a viscosity index of 60 or higher, and a water content of 300 ppm or lower.
Abstract:
High performance engine oils and other liquid lubricants comprise a liquid lubricant basestock of low viscosity from 1.5 to 12 cSt (110C) with two dissolved polymer components of differing molecular weights. The basestock is preferably a single PAO or blend of PAOs with a co-basestock component which is preferably an ester or an alkylated aromatic of comparable viscosity. The lower molecular weight polymer is highly viscoelastic in character and is preferably an HVI-PAO; this component in the lubricant which provides unexpectedly high film thickness and unexpectedly good wear protection under conditions where the second, higher molecular weight polymer may lose some or all of its thickening power. The use of the highly viscoelastic low molecular weight polymer in combination with the higher molecular weight thickener enables the production of very widely cross-graded engine oils, especially oils with a low temperature grading of 0W or better. Oils with cross gradings of 0W20, 0W30, 0W40 or even more widely cross graded, for example 0W70 or higher may be achieved.
Abstract:
An article having a bearing surface with improved wear characteristics is provided. The article may be formed from a composition that includes a polymeric material, a lubricious and reinforcing additive, and a solid lubricant. Methods for forming the compositions and structures are also provided.
Abstract:
A lubricating oil composition which comprises a base oil and incorporated therein at least one cyclic organophosphorus compound represented by general formula (I). The composition is excellent in extreme pressure properties, seizing resistance, and wearing resistance and is useful as a bearing oil, gear oil, hydraulic fluid, refrigerating machine oil, etc. (In the formula, Z represents hydrogen, alkyl, cycloalkyl optionally substituted by C1-12 alkyl and/or hydroxy, aryl optionally substituted by C1-12 alkyl and/or hydroxy, or aryl-substituted alkyl optionally substituted by C1-12 alkyl and/or hydroxy; X and X each independently represents halogeno or hydroxy; and p and q each is an integer of 0 to 3).
Abstract:
The method of the invention comprises reducing friction and wear between solid surfaces which are, or which are to be, in relative motion, comprising applying to at least one of the solid surfaces a polymeric material as a synthetic lubricating oil. The lubricating oils can be used to lubricate solid surfaces where elevated operating temperatures are present.
Abstract:
An effective lubricant for cold working of metals is provided by a combination of a water soluble copolymer of styrene with maleic anhydride, maleic acid, and/or an ammonium or substituted ammonium maleate salt with an ethoxylated alcohol, preferably an alcohol with at least 40 carbon atoms before ethoxylation and about 50 % of its mass in the polyoxyethylene block in the molecule.