GREASE COMPOSITION FOR CONSTANT VELOCITY JOINT AND CONSTANT VELOCITY JOINT

摘要

A grease composition which provides, in the working range of 150° C. to −40° C., an enhanced temperature control performance, a reduced low-temperature rotational torque and an improved boot resistance; and a constant velocity joint wherein the grease composition is filled; are provided. A grease composition for a constant velocity joint comprising the following components (A) to (E):;(A) a base oil containing 10 to 95% by mass of an ester synthetic oil produced from an aliphatic alcohol and an aromatic carboxylic acid and 90 to 5% by mass of a synthetic hydrocarbon oil;;(B) a thickener;;(C) molybdenum disulfide;;(D) molybdenum dialkyldithiocarbamate e; and;(E) zinc dithiophosphate.

主权项

1. A method for lubricating a cross groove type constant velocity joint for a propeller shaft with a grease composition, which comprises the following components (A) to (E):
(A) a base oil containing 10 to 95% by mass of an ester synthetic oil produced from an aliphatic alcohol and an aromatic carboxylic acid and 90 to 5% by mass of a synthetic hydrocarbon oil; (B) a diurea thickener consisting of one or more compounds represented by the following General Formula (I)
R1NH—CO—NH—C6H4-p-CH2-C6H4-p—NH—CO—NHR2  (I)wherein R1 and R2 are the same or different and are selected from the group consisting of hexadecyl, octadecyl and oleyl;
(C) molybdenum disulfide; (D) molybdenum dialkyldithiocarbamate; and (E) zinc dithiophosphate,wherein the content of the diurea thickener is 5 to 20% by mass based on the total mass of the grease composition.