润滑科技信息平台

专利摘要

本发明提供一种能够同时满足操作稳定性和乘坐舒适性(特别是在微小振幅时)的缓冲器用润滑剂组合物、缓冲器以及缓冲器用润滑剂组合物的摩擦调整方法。减震器用润滑剂组合物含有基础油和摩擦调节剂,其中摩擦调节剂含有季戊四醇酯,季戊四醇酯含有最高比例或含量为50质量%以上的季戊四醇四酯,并且季戊四醇酯含量为0.5质量%以上。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US17/766508
申请日期:
专利申请人:
分类号:
["F16F9/32","C10M125/24","C10M129/74"]
发明/设计人:
KATO, SHINJI
权利要求: 1. A lubricant composition for shock absorbers, comprising:a base oil, a friction adjusting agent and zinc dithiophosphate, whereinthe friction adjusting agent contains a pentaerythritol ester,the pentaerythritol ester is a mixture of a pentaerythritol tetraester and a pentaerythritol ester other than the pentaerythritol tetraester,the mixture of the pentaerythritol ester contains a pentaerythritol tetraester at the largest proportion,a content of the pentaerythritol ester is 0.5 mass % or more, andthe zinc dithiophosphate has an alkyl group having 3 to 5 carbon atoms.2. The lubricant composition for shock absorbers according to claim 1, wherein the mixture of pentaerythritol tetraester and the pentaerythritol ester other than the pentaerythritol tetraester has an average number of an ester group of more than 3.3. The lubricant composition for shock absorbers according to claim 1, wherein the mixture of pentaerythritol tetraester and the pentaerythritol ester other than the pentaerythritol tetraester has an average number of a hydroxyl group of less than 1.4. The lubricant composition for shock absorbers according to claim 1, wherein a ratio of a friction coefficient μ2 at the time of a minute amplitude and a friction coefficient μ1 at the time of a normal amplitude (μ2/μ1) is 0.8 or more.5. The lubricant composition for shock absorbers according to claim 1, wherein a friction coefficient μ3 of a lubricant immediately before sliding is stopped or immediately after sliding is started is larger than a friction coefficient μ4 of the lubricant in a sliding state.6. The lubricant composition for shock absorbers according to claim 1, wherein a hydroxyl value is 0.5 mgKOH/g or more.7. The lubricant composition for shock absorbers according to claim 1, wherein a content of the pentaerythritol ester is 5 mass % or more.8. A shock absorber using the lubricant composition for shock absorbers according to claim 1.