摘要:
The grease composition for constant velocity joints of the invention is characterized by comprising a lubricating base oil, a thickener, carbon black with a mean particle size of not greater than 500 nm, and an organic molybdenum compound. A grease composition for constant velocity joints according to the invention can achieve a highly satisfactory balance between anti-flaking, anti-seizure and anti-wear without using lead compounds, and can sufficiently maintain these properties with long-term use.
摘要:
A grease composition containing a lubricant base oil, diurea compounds represented by the following general formulas (1) to (3), and at least one species selected from the group consisting of paraffin oxides and phosphorus compounds; wherein respective contents of the diurea compounds represented by the following general formulas (1) to (3) satisfy conditions defined by the following expressions (4) and (5); and wherein the total content of the paraffin oxides and phosphorus compounds is 0.1 to 15 mass % based on the total amount of the grease composition: where R1 is a hydrocarbon group containing an aromatic ring, R2 is a divalent hydrocarbon group, and R3 is a hydrocarbon group containing an aliphatic ring; 5≦W1+W2+W3≦30 (4) 0.3≦(W1+0.5×W2)/(W1+W2+W3)≦0.7 (5) where W1, W2, and W3 are respective contents (mass %) of the diurea compounds represented by general formulas (1) to (3) based on the total amount of the grease composition.
摘要:
A lubricant composition for ball joints exhibits excellent low friction not only at ordinary temperatures but also from higher to lower temperatures, and will not leak out of ball joints at higher temperatures. A ball joint has the lubricant composition sealed therein. The lubricant composition contains a base oil including a synthetic hydrocarbon oil, a thickener, and a fatty acid salt of a compound represented by the formula (1): R1—NH—R2—NH2 (1) (R1: hydrocarbon group of C1 to C24; R2: alkylene group of C2 to C4).
摘要:
A grease composition containing a lubricant base oil, diurea compounds represented by the following general formulas (1) to (3), and at least one species selected from the group consisting of paraffin oxides and phosphorus compounds; wherein respective contents of the diurea compounds represented by the following general formulas (1) to (3) satisfy conditions defined by the following expressions (4) and (5); and wherein the total content of the paraffin oxides and phosphorus compounds is 0.1 to 15 mass % based on the total amount of the grease composition: where R1 is a hydrocarbon group containing an aromatic ring, R2 is a divalent hydrocarbon group, and R3 is a hydrocarbon group containing an aliphatic ring; 5≦W1+W2+W3≦30 (4) 0.3≦(W1+0.5×W2)/(W1+W2+W3)≦0.7 (5) where W1, W2, and W3 are respective contents (mass %) of the diurea compounds represented by general formulas (1) to (3) based on the total amount of the grease composition.
摘要:
A lubricant composition for ball joints exhibits excellent low friction not only at ordinary temperatures but also from higher to lower temperatures, and will not leak out of ball joints at higher temperatures. A ball joint has the lubricant composition sealed therein. The lubricant composition contains a base oil including a synthetic hydrocarbon oil, a thickener, and a fatty acid salt of a compound represented by the formula (1): R1—NH—R2—NH2 (1) (R1: hydrocarbon group of C1 to C24; R2: alkylene group of C2 to C4).
摘要:
A grease composition containing a lubricant base oil, diurea compounds represented by the following general formulas (1) to (3), and an organic molybdenum compound; wherein respective contents of the diurea compounds represented by the following general formulas (1) to (3) satisfy conditions defined by the following expressions (4) and (5); and wherein the organic molybdenum compound is contained by 0.1 to 20 mass % based on the total amount of the grease composition: where R1 is a hydrocarbon group containing an aromatic ring, R2 is a divalent hydrocarbon group, and R3 is a hydrocarbon group containing an aliphatic ring; 5≦W1+W2+W3≦30 (4) 0.1≦(W1+0.5×W2)/(W1+W2+W3)≦1.0 (5) where W1, W2, and W3 are respective contents (mass %) of the diurea compounds represented by general formulas (1) to (3) based on the total amount of the grease composition.
摘要:
A lubricant composition for ball joints exhibits excellent low friction not only at ordinary temperatures but also from higher to lower temperatures, and will not leak out of ball joints at higher temperatures. A ball joint has the lubricant composition sealed therein. The lubricant composition contains a base oil including a synthetic hydrocarbon oil, a thickener, and a fatty acid salt of a compound represented by the formula (1): R1—NH—R2—NH2 (1) (R1: hydrocarbon group of C1 to C24; R2: alkylene group of C2 to C4).
摘要:
The grease composition of the present invention contains, in a lubricant base oil, 0.01 to 10% by mass of a fatty acid salt, 0.01 to 10% by mass of carbonate, 2 to 30% by mass of a thickener, and 0.1 to 20% by mass of a sulfur type extreme-pressure agent on the basis of the total amount of composition.
摘要:
A grease composition comprising a lubricating base oil combined with (A) 2-30 wt % of a thickener and (B) 0.1-10 wt % of at least one type of compound selected from the group consisting of phosphorus compounds represented by general formulas (1) and (2) below and their metal salts or amine salts, based on the total weight of the composition. [wherein X1, X2 and X3 each represent an oxygen atom or sulfur atom, with at least two from among X1, X2 and X3 being oxygen atoms, and R1, R2 and R3 each represent hydrogen or a C1-30 hydrocarbon group] [wherein X4, X5, X6 and X7 each represent an oxygen atom or sulfur atom, with at least three from among X4, X5, X6 and X7 being oxygen atoms, and R4, R5 and R6 each represent hydrogen or a C1-30 hydrocarbon group].
摘要:
A grease composition to be encapsulated in a boot made from TPC for use in a tripot type constant velocity joint having a base oil, a thickener of a urea based compound, a solid molybdenum dithiocarbamate and an alkali metal borate hydrate, wherein the liquid component in the grease composition has a sulfur content of 0.6 mass % or less relative to the total amount of the liquid component.