摘要:
PROBLEM TO BE SOLVED: To provide a grease composition excellent in high temperature high speed durability, and a grease prelubricated bearing prelubricated with the grease composition. SOLUTION: The grease prelubricated bearing 1 is prelubricated with a grease composition 7 obtained by compounding an additive with a base grease comprising a base oil and a thickener. The thickener is a diurea compound represented by formula (1), wherein R 1 and R 2 may be the same or may differ from each other, and represent a monovalent aliphatic hydrocarbon group, an alicyclic hydrocarbon group, or an aromatic hydrocarbon group; and R 3 and R 4 may be the same or may differ from each other, and represent a divalent aliphatic hydrocarbon group, an alicyclic hydrocarbon group, or an aromatic hydrocarbon group. COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method for producing a mixture of an isomer phthalic acid dialkyl ester having specified viscosity. SOLUTION: The mixture of an isomer phthalic acid dialkyl ester has viscosity and a composition represented by formula IV and is produced by mixing a pure isomer phthalic acid dialkyl ester and/or a mixture of a phthalic acid dialkyl ester (wherein the alkyl ester has the same number of carbon and the number of carbon that corresponds to the viscosity). COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a grease composition improving the temperature-rise-suppressive tendency of the constant-velocity joint containing the composition within the range of service temperature of 150°C to -40°C and reducing low-temperature rotating torque, thus improving the boot resistance of the joint, and to provide such a constant-velocity joint which seals-in the grease composition. SOLUTION: The grease composition comprises (A) a base oil comprising 10-95 wt.% of an ester-based synthetic oil produced from an aliphatic alcohol and an aromatic carboxylic acid and 90-5 wt.% of a synthetic hydrocarbon oil, (B) a thickening agent, (C) molybdenum disulfide, (D) molybdenum sulfurized dialkyl dithiocarbamate and (E) zinc dithiophosphate. The constant-velocity joint which seals-in the above grease composition is also provided. COPYRIGHT: (C)2008,JPO&INPIT
摘要:
A lubricating grease composition that is a mixture of(a) a hydrocarbon-based oil,(b) a perfluoro-polyalkyl ether oil of the formula in whichA' is -CF3, -C2F5, -C3F7, or -CF2T where T is H or Cl,A'' is A' or -CF3, C2F5, -C3F7, or -CF2T, where T is H or Cl1 andv, w, x, y and z are whole numbers >=0,(c) a dicarbamide as a thickening agent,(d) typical additives and(e) organic and inorganic solid lubricants.A process for the production of the lubricating grease composition is also provided.
摘要:
The present invention relates to a lubricant composition for a high temperature of which the amount evaporated in a thin film at a high temperature is controlled and of which the fluidity is maintained for a long period of time, and it is a lubricant composition for a high temperature which is obtained by mixing a base oil composition comprising (a) 20 to 100% by weight of a specific aromatic ester and (b) 0 to 80% by weight of another base oil with (c) 0.1 to 10% by weight, based on the total amount of the lubricant composition, of an antioxidant.