Abstract:
The use of a basestock of lubricating viscosity containing 40 to 80 mass % of one or more Group IV basestocks, as defined by API 1509, in an SAE 10W-X or SAE 5W-X or SAE 0W-X crankcase lubricating oil composition, wherein X is 20, 30 or 40, comprising two or more additive components including one or more ashless dispersants and one or more metal detergents, to pass the VW PVI449 or T-4 test.
Abstract:
Provided are novel succinimide compounds obtained by reacting a polyamine having a carbon/nitrogen weight ratio of from 0.85 to 1.25 with a succinic acid compound in a molar ratio to the polyamine of up to 1.40; a process for producing them; a lubricating oil additive containing the compound; and a lubricating oil composition for internal combustion engines which comprises a lube base oil, (a) at least one compound selected from the group consisting of overbased sulfonates, phenates and salicylates with alkaline earth metals, and (b) the succinimide compound, and which has a total base number of from 30 to 150 mg-KOH/g. The composition is for use in internal combustion engines that may discharge a large amount of sulfur oxides (SOx), having the advantage of good corrosion resistance against SOx to be discharged in large quantities.
Abstract:
A lubricant having improved rust protection and demulsibility has a specific balance of an ashless dispersant and a rust inhibitor additive combination comprising a metallic and ashless rust inhibitor.
Abstract:
A lubricant composition for continuous variable transmissions which comprises a base oil and auxiliaries incorporated therein which are a sulfur-based extreme pressure additive (A), a phosphorus-based extreme pressure additive (B), and an alkaline earth metal-based detergent (C). It is superior in wear resistance and extreme pressure properties and keeps the coefficient of friction high for a long period of time, so that it is capable of transmitting a large capacity of torque when it is applied to an continuous variable transmission. It is particularly suitable for a transmission of metal belt type.
Abstract:
PROBLEM TO BE SOLVED: To provide a lubricant composition containing essentially no zinc dialkyldithiophosphate anti-abrasion agent. SOLUTION: The lubricant composition found is constituted by containing: a large amount of a base oil; and a lead corrosion-inhibiting amount of a reaction product of a hydrocarbyl carbonyl compound with an amine compound selected from guanidine, urea, and thiourea, with the proviso that the lubricant essentially contains neither zinc dialkyldithiophosphate anti-abrasion agents nor chlorinated paraffins nor calcium Mannich phenates. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of low potency friction modifiers and phosphorus-containing compounds. The anti-shudder durability of these fluids may be further enhanced by inclusion of a metallic detergent and/or a polyol ester friction modifier.
Abstract:
PROBLEM TO BE SOLVED: To provide a multi-functional lubricant additive useful as a dispersant in internal combustion engines. SOLUTION: This oil-soluble lubricant additive composition is produced by a method including reacting a copolymer with at least one polyether compound and at least one aliphatic compound capable of reacting with at least one monocarboxylic acid or its ester or dicarboxylic acid, its anhydride or its ester. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
The invention relates to the use of an effective quantity of borated compounds having the following general formula I: in which X is S or O, and R is a hydrocarbyl group containing at least 3 carbon atoms, in particular between 3 and 50 carbon atoms and preferably between 3 and 17 carbon atoms, as an additive improving the compatibility of a lubricating oil composition, comprising dispersants containing basic nitrogen atoms, with fluorocarbon elastomers. In a preferred fashion, the compound of genral formula I is borated glycerol monooleate and the concentraion of the compound of general formula I is such that the % Boron/% basic N ratio of the lubricating composition varies from 0.25 to 5.