摘要:
A lubricant of (a) an oil of lubricating viscosity; (b) a block copolymer of (i) a hydrophobic first block of C1-30 alkyl (meth)acrylic units having an average total number of carbon atoms of at least 8; and (ii) a second block of (meth)acrylic units, at least some units of which comprise a heteroatom imparting polar character to the block; (c) an overbased calcium detergent; (d) a phosphorus-containing anti-wear agent that does not contribute to the metal content of the lubricant; and (e) a friction modifier suitable to reduce the static coefficient of friction at a metal-composition interface, is suitable for lubricating a farm tractor.
摘要:
The lubricating base oil of the invention is characterized by satisfying at least one of the following conditions (a) or (b). (a) A saturated compound content of 95 % by mass or greater, and a proportion of 0.1-10 % by mass of cyclic saturated compounds among the saturated compounds. (b) The condition represented by the following formula (1). 1.435 ≤ n 20 - 0.002 × kv 100 ≤ 1.450 wherein n 20 represents the refractive index of the lubricating base oil at 20°C, and kv100 represents the kinematic viscosity (mm 2 /s) of the lubricating base oil at 100°C.
摘要:
A multiple function polymer comprising a graft polymer of a polyolefin, a nitrogenous, ethylenically unsaturated, aliphatic or aromatic monomer having from 2 to about 50 carbon atoms, and an organo-metallic compound capable of reacting with said polyolefin is disclosed. Also disclosed is a process for making said multiple function graft polymer. Also disclosed is a lubricating oil comprising a lubricant base oil, the multiple function polymer, and optionally other dispersants. Also disclosed is a multiple function polymer comprising a graft polymer of a polyolefin, and an organo-metallic compound capable reacting with said polyolefin, and a process for making the same.
摘要:
A lubricant composition of an oil, a dispersant viscosity modifier of a poly(meth)acrylate copolymer having a nitrogen-containing monomer in an amount to provide at least about 0.4 percent by weight nitrogen to the copolymer, and a succinimide dispersant prepared in the substantial absence of chlorine gives good performance as a transmission fluid.
摘要:
This invention relates to a method of lubricating an internal combustion engine comprising at least one of a crankcase, a gear and a wet-clutch, said method comprising supplying to said crankcase, gear and wet-clutch a lubricating composition comprising: (a) an oil of lubricating viscosity; and (b) a viscosity modifier with a number average molecular weight from 1000 to 75,000, wherein the lubricating composition has a SAE viscosity grade from XW-Y, wherein X is from 0 to 20 and Y is from 20 to 50; and wherein the lubricating composition has a phosphorus content from a metal hydrocarbyl dithiophosphate of 0.12 wt % or less.
摘要:
A lubricating oil composition comprising an oil of lubricating viscosity and a total of from about 1 to about 50% by weight of copolymers comprising (A) at least one ethylene-aliphatic olefin copolymer wherein the aliphatic olefins contain from 3 to about 24 carbon atoms, said copolymer (A) having Mn ranging from about 600 to about 5000, and (B) at least one copolymer comprising units derived from alkyl acrylate ester monomers containing from 2 to about 25 carbon atoms in the ester group, and optionally, from about 0.1% to about 20% by weight of at least one member of the group consisting of vinyl aromatic monomers and nitrogen-containing vinyl monomers. said copolymer (B) having Mn ranging from about 10,000 to about 350,000, wherein the weight ratio of (A):(B) ranges from about 99:1 to about 1:99.