| 摘要 |
PURPOSE: Provided is a grease composition for a wiper linkage of a car, which is excellent in adhesive property, washing water resistance, and shear stability by using a urea-based grease thickener and polybutene and ethylene propylene polymer as adhesion improvers. CONSTITUTION: The grease composition contains a base oil, 10-25wt% of the urea-based grease thickener(formula 1: R1NH-CO-NH-C6N4-p-CH2-p-NH-CO-NHR2), 2.0-4.0wt% of the polybutene having a molecular weight of 50,000-100,000, and 1.0-2.0wt% of the ethylene propylene polymer having a molecular weight of 100,000-200,000, wherein the base oil is a synthetic lubricant oil comprising poly alpha olefin and mineral oil and has a kinematic viscosity of 6-10cSt at 100deg.C. In the formula, R1 and R2 are independently or simultaneously C6-C7 aromatic hydrocarbon or cyclohexyl or C6-C20 aliphatic hydrocarbon.
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