Abstract:
Disclosed herein are a lubricating composition comprising 5 to 65% by weight of a solid lubricant powder material, 5 to 20% by weight of a lubricating oil which is in a liquid or paste form at an ordinary temperature, 1 to 8% by weight of a carrier for absorbing and possessing said lubricating oil, 10 to 30% by weight of a thermoplastic resin, and 25 to 50% by weight of a thermosetting synthetic resin, and a sliding member comprising a metal substrate and a solid lubricant composed of the lubricating composition.
Abstract:
This invention provides a refrigerator working fluid composition characterized by excellent compatibility, lubricating ability, thermal stability, and electrical insulation capacity, and comprising a refrigerating machine oil and a hydrofluorocarbon compound, wherein the refrigerating machine oil comprises:
(A) 100 parts by weight of at least one ester compound selected from the group consisting of:
(1) ester compounds obtained from
(a) an aliphatic polyhydric alcohol having 1 to 6 primary hydroxyl groups, (b) a straight or branched chain saturated aliphatic monocarboxylic acid having 2 to 9 carbon atoms or a derivative thereof, and (c) a straight or branched chain saturated aliphatic dicarboxylic acid having 2 to 10 carbon atoms or a derivative thereof; and
(2) ester compounds obtained from
(a) an aliphatic polyhydric alcohol having 1 to 6 primary hydroxyl groups, (d) a straight or branched chain saturated aliphatic monohydric alcohol having 1 to 10 carbon atoms, and (e) a polycarboxylic acid having 2 to 10 carbon atoms or a derivative thereof; and
(B) at least one compound selected from the group consisting of 0.1 to 5.0 parts by weight of a triaryl phosphate, a triaryl phosphite, or a mixture thereof; 0.001 to 0.1 parts by weight of benzotriazole, a derivative thereof, or a mixture thereof; 0.05 to 2.0 parts by weight of an epoxy group-containing compound; and 0.001 to 2.0 parts by weight of a metal deactivator having a chelating function.
Abstract:
Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the piston ring zone of the engine to form soluble neutral salts containing the weak base and the combustion acids. Thereafter, the neutral salts are contacted with a heterogeneous strong base immobilized within the lubrication system but outside the piston ring zone. The strong base displaces the weak base from the neutral salts, returning the weak base to the oil for recirculation to the piston ring zone for further use. The remaining strong base/combustion acid salts are immobilized as deposits with the strong base rather than on the piston. In a preferred embodiment, trioctadecyl amine is the weak base and zinc oxide is the strong base. In a particularly preferred embodiment, the weak base is incorporated on a substrate, preferably a cement binder.
Abstract:
The present invention relates to a lubricating oil composition comprising a mineral oil, an ethylene-α-olefin copolymer, a polymethacrylate and common additives, characterized in that it comprises (A) a mineral oil having a kinematic viscosity at 100°C of 1 . 10⁻⁶ to 50 . 10⁻⁶ m²/s (1 -50 cSt) and a viscosity index of at least 60, (B) 0,5 to 20% by weight based on the total weight of the composition of an ethylene-α-olefin copolymer having a number average molecular weight of 800 to less than 5 000, (C) 0,05 to 20% by weight based on the total weight of the composition of polymethacrylate having a number average molecular weight of 10 000 to 250 000 or a mixture of said polymethacrylate and an olefin copolymer, having a number average molecular weight of 10 000 to 250 000 selected from the group consisting of an ethylene-propylene copolymer and an ethylene-styrene copolymer, and (D-II)0,5 to 20% by weight based on the total weight of the composition of at least one member selected from the group consisting of a extreme pressure agent, an anti-wear agent and an oiliness agent.
Abstract:
The refrigeration oil composition comprises (1) a hydrogenated fluoroethane and (2) an ester compound obtained from (2-a) an aliphatic polyhydric alcohol having 1 to 6 primary hydroxyl groups, (2-b) a saturated aliphatic monocarboxylic acid having 2 to 9 carbon atoms, straight or branched, or a derivative thereof and (2-c) a saturated aliphatic dicarboxylic acid having 2 to 10 carbon atoms, straight or branched, or a derivative thereof, said ester compound having a kinematic viscosity at 100 degree C of 1 to 100 cst.
Abstract:
Fine particles of gallium or gallium alloy that are covered with a coating agent on the surface can be dispersed in a solvent such as an engine oil, n-hexane, etc., to make a variety of useful liquid suspensions which include a modified automotive engine oil which is more powerful than a commercial engine oil; a liquid ski wax which is portable in a cylindrical container; and the like.
Abstract:
Disclosed is a lubricating oil for compression-type refrigerators comprising, as a main component, a polyoxyalkylene glycol derivative which has at least one constitutional unit represented by the general formula: wherein R¹ to R⁴ are as defined in the specification. Said lubricating oil for compression-type refrigerators has good miscibility with refrigerants including R-134a.
Abstract:
This invention relates to an ultrahigh-molecular polyethylene sheet produced by extruding polyethylenic material comprising an ultrahigh-molecular polyethylene of a viscosity-average molecular weight of 0.3 to 2 million into a 100 to 300 µpm thick sheet.