167 results about "Zinc dithiophosphate" patented technology

A lubricating composition for internal combustion engines especially useful with fuels having less than 350 ppm sulfur comprises a lubricating oil basestock, a boron containing ashless dispersant, a molybdenum containing friction reducing agent, a metal type detergent and zinc dithiophosphate.

Lubricant compositions comprise a lubricant base oil, and (A) a mono substituted amide type bissuccinimide in an amount from 0.5 to 20 percent by mass, (B) zinc dithiophosphate in an amount from 0.05 to 0.3 percent by mass of phosphorus, and (C) a metal-based detergent in an amount form 0.5 to 4.0 percent by mass of sulfated ash, based on the total mass of the composition. Lubricant compositions preferably further comprises (D) a dispersant type viscosity index improver in an amount from 0.1 to 20 percent by mass, based on the total mass of the composition.

A piston for an internal combustion engine of an automotive vehicle. The piston has a piston ring and a piston skirt section each of which has a sliding section in slidable contact with a cylinder bore section of a cylinder block in presence of a lubricating oil. The cylinder bore section is formed of eutectic or hyper-eutectic aluminum alloy. Additionally, a hard carbon thin film is coated on the sliding section of the piston and contains hydrogen atom in an amount of not more than 1 atomic %. Here, the lubricating oil contains at least one selected from the group consisting of ashless fatty acid ester friction modifier, ashless aliphatic amine friction modifier, polybutenyl succinimide, derivative of polybutenyl succinimide, zinc dithiophosphate, and derivative of zinc dithiophosphate.

The present invention provides: a tread rubber composition having high grip performance, wear resistance, and tensile performance, in which the incidence of blowouts can be suppressed even during high-temperature travel in a high-softener formulation thereof in which at least a certain amount of a softener is blended with respect to a rubber component including a diene-based rubber; and a pneumatic tire having tread fabricated using the tread rubber composition. The present invention is a tread rubber composition including: a diene-based rubber including styrene butadiene rubber; at least one type of softener selected from the group consisting of a low-temperature plasticizer, a process oil, and a resin having a softening point of 160 DEG C or lower; zinc dithiophosphate; and sulfur; the content of the softener being 40 parts by mass or greater, the content of the zinc dithiophosphate being 0.2-15 parts by mass, and the content of zinc oxide being less than 2.5 parts by mass with respect to 100 parts by mass of the diene-based rubber.

The present invention provides: a rubber composition for treads, which contains a diene rubber as a rubber component and is capable of achieving a good balance among wet grip performance, wear resistance and blowout resistance on dry roads; and a pneumatic tire having a tread which is produced using this rubber composition for treads. The present invention is a rubber composition for treads, which contains: a diene rubber containing a styrene butadiene rubber; zinc dithiophosphate; an inorganic filler which is composed of at least one substance selected from the group consisting of compounds represented by the formula described below, magnesium sulfate and silicon carbide, and which has a BET value of 5-120 m<2> / g and a linseed oil absorption of 30-80 ml / 100 g; and sulfur. Relative to 100 parts by mass of the diene rubber, the content of the zinc dithiophosphate is 0.2-15 parts by mass, the content of the inorganic filler is 1-70 parts by mass, and the content of zinc oxide is less than 2.5 parts by mass. In the formula of mM.xSiOy.zH2O, M represents at least one metal selected from the group consisting of Al, Mg, Ti, Ca and Zr, or an oxide or hydroxide of the metal; m represents an integer of 1-5; x represents an integer of 0-10; y represents an integer of 2-5; and z represents an integer of 0-10.

The present invention provides a long-life gasoline engine oil composition, which contains a hydrogenated styrene-diene compound, zinc alkyldithiophosphate, monoalkyl molybdenum dithiocarbamate, polyol ester, a hindered phenol antioxidant, and a base oil. With this composition, vehicle fuel efficiency can be improved, oxidation stability can be increased, and the life span of engine oil can be extended.

Lubricating oil composition for use in diesel engines which comprises, in the base oil, not more than 0.3% by mass of sulphated ash, from 0.01 to 0.2% by mass of nitrogen in succinimides, from 0.05 to 0.12% by mass of zinc in zinc dithiophosphates, from 0.02 to 0.3% by mass of nitrogen in amine-based anti-oxidants, and from 0.01 to 0.08% by mass of boron, which further has a total value of [(zinc amount in zinc dithiophosphates) x (nitrogen amount in succinimides)] and [(zinc amount in zinc dithiophosphates) x (nitrogen amount in amine-based anti-oxidants) ] as regards the aforementioned of from 0.015 to 0.06, and which does not contain salicylate, phenate or sulphonate metallic detergents. The intention is to obtain a lubricating oil composition for use in diesel engines which does not contain a metallic detergent yet maintains excellent engine (piston) detergency while preventing DPF clogging, and which reduces valve-train wear.