GREASE COMPOSITION FOR PREVENTING DETERIORATION OF RUBBER

摘要

PURPOSE: A grease composition having a reduced amount of a sulfur-phosphorous-based additive for improving extreme pressure property by adding a borate compound to conventional grease compositions is provided. Therefore, the composition can effectively prevent rubber deterioration while maintaining or improving extreme pressure property and abrasion coefficient characteristic. CONSTITUTION: The titled grease composition is characterized in that 0.3 to 5% by weight of a borate compound is added to grease containing a sulfur-phosphorous-based abrasion preventing agent, a sulfur-based extreme pressure additive and an organic molybdenum compound, wherein a content of a sulfur component and phosphorous component of the total grease does not exceed 2% by weight respectively.