▎ 摘　　要

NOVELTY - Grease composition comprises base oil, thickening agent and additive. The base oil is ester synthetic oil. The thickening agent is aliphatic dipolyurea. The additive comprises graphene. The mass ratio of the graphene and the aliphatic dipolyurea is (1-2):(9-20). USE - Grease composition used in bearing, preferably, micro bearing (claimed) used in 5G communication base station. ADVANTAGE - The grease composition has excellent oxidation resistance and wear resistance, suitable for severe working conditions of the miniature bearing, realizes a lifelong lubricating effect on the miniature bearing, has long service life, and solves the problem of high fan noise and poor energy saving performance of the lubricating grease in the operation process of the existing 5G communication base station. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a grease composition, which involves: i. mixing organic amine for preparing a thickening agent with portion of base oil to obtain a first material; ii. mixing diisocyanate for preparing a thickening agent with the rest of the base oil to obtain a second material; iii. mixing the first and second materials, densifying mixed material and mixing with additives.