98 results about "Calcium Salicylate" patented technology

The invention discloses a synthesis method of a calcium-magnesium salicylate composite detergent in the field of lubricant additives. The method comprises the following steps: adding alkyl salicylic acid and solvent xylene in a reaction container, adding calcium oxide, accelerant, auxiliary promoter and the like in a stirring state, and carrying out a neutralization reaction when a reaction temperature rises to the temperature needed by the neutralization reaction; after the neutralization reaction is ended, adding magnesium oxide, water, ammonia water, auxiliary promoter and the like, charging carbon dioxide and carrying out a carbonation reaction; after the carbonation reaction is ended, carrying out product post-treatment to obtain a lubricant detergent product. The method disclosed by the invention achieves the following beneficial effects: the alkali number of the calcium-magnesium salicylate composite detergent prepared by the method is greater than 400mg KOH / g, the thermal oxidation stability and the high-temperature detergency of lubricant oil are obviously improved, the dispersibility and the wear resistance of the lubricant oil are improved to a certain extent, and the product stability is great.

[Problem] To provide a lubricating oil composition capable of attaining high-level fuel efficiency, durability and piston detergency in internal-combustion engines. [Means for Resolution] The lubricating oil composition according to the present invention contains a viscosity index improver and a metallic detergent in at least one base oil selected from mineral oils and synthetic oils therein, wherein the viscosity index improver contains a polymethacrylate viscosity index improver and an olefin copolymer viscosity index improver, the polymethacrylate viscosity index improver is contained in an amount of from 3.0% by mass to 9.5% by mass based on the total amount of the lubricating oil composition, the metallic detergent is at least one selected from calcium sulfonate, calcium phenate and calcium salicylate, the calcium amount derived from the metallic detergent is from 500 ppm to 1500 ppm based on the total amount of the lubricating oil composition, the high-temperature high-shear viscosity at 150°C of the lubricating oil composition is 2.6 mPa·s or more, the high-temperature high-shear viscosity at 80°C of the lubricating oil composition is 7.8 mPa·s or less, and the ratio of the high-temperature high-shear viscosity at 100°C of the lubricating oil composition to the high-temperature high-shear viscosity at 150°C thereof is 2.05 or less.

Provided is a lubricating oil composition for a continuously variable transmission, said composition exhibiting a low viscosity whilst maintaining the viscosity required of the lubricating oil composition throughout a period of use in a mechanism, and maintaining a high friction coefficient between metals so as to ensure a high power-transmitting force provide the wet clutch friction characteristics and the shudder prevention properties required in a transmission. The composition also achieves improved fuel economy due to a low traction coefficient. In the composition, (B) a phosphorus compound, (C) a calcium salicylate and / or a calcium sulfonate, (D) a boron-modified ashless dispersant, and (E) a friction regulating agent are included, each at a specified amount, in a base-oil that has been adjusted so that the product (ECxV40) of the mass percent (EC(mass%)) of a saturated cyclic component, as based on the total base-oil mass, and the kinematic viscosity (V40(mm2 / s)) at 40 DEG is equal to or less than 500, and the kinetic viscosity at 100 DEG is 3.6-4.1mm2 / s. The lubricating oil composition has a kinematic viscosity at 100 DEG of 5.2-5.6mm2 / s and a viscosity index of equal to or greater than 165.

Lubricating oil compositions having a sulfated ash content of no more than 1.0 mass %, which contain a major amount of oil of lubricating viscosity, a minor amount of calcium salicylate detergent, an amount of a magnesium-based detergent providing the lubricating oil composition with at least 200 ppm of magnesium, an amount of a sulfur-containing molybdenum compound providing the lubricating oil composition with at least 20 ppm of molybdenum, and at least one nitrogen-containing dispersant providing the lubricating oil composition with at least 0.9 mass % nitrogen, which compositions provide improved top ring wear protection in internal combustion engines.

Lubricating oil compositions having a sulfated ash content of no more than 1.0 mass %, which contain a major amount of oil of lubricating viscosity, a minor amount of calcium salicylate detergent, an amount of a magnesium-based detergent providing at least 200 ppm of magnesium, and a basic, low molecular weight, nitrogen-containing dispersant, which compositions provide improved top ring wear protection in internal combustion engines.