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润滑科技信息平台
机械工程学会摩擦学分会 固体润滑国家重点实验室 摩擦学学报
润滑油成分
专利摘要

本发明提供了一种润滑油组合物,其包含基于该润滑油组合物总重量的至少80wt%的基础油,其中该基础油选自第II类、第III类和费-托衍生的基础油及其混合物 [0070] 除柠檬酸外的一种或多种添加剂,选自由抗磨添加剂、防锈剂和腐蚀抑制剂、分散剂、极压添加剂、摩擦改进剂、粘度指数改进剂、倾点下降剂、抗氧化剂组成的组,和 或多种柠檬酸及其衍生物。 本发明还提供选自一种或多种柠檬酸及其衍生物的添加剂在润滑油组合物中的用途,所述润滑油组合物包含基于润滑油组合物总重量至少80wt%的基础油,其中所述基础油选自 II类、III类和费-托衍生的基础油及其混合物和除柠檬酸之外的一种或多种添加剂,所述添加剂选自由抗磨添加剂、防锈剂和腐蚀抑制剂、分散剂、极压添加剂、摩擦改进剂组成的组 、粘度指数改进剂、倾点下降剂、抗氧化剂,以改善所述润滑油组合物的空气释放性能,如通过ASTM D3427测量的。 ......

基本信息
  • 专利类型:

    发明专利

  • 申请/专利号:

    PCT/EP2024/058878

  • 申请日期:

    2024-04-02

  • 专利申请人:

    ["国际壳牌研究有限公司","SHELL USA INC"]

  • 分类号:

    ["C10M169/00","C10N30/18","C10N30/00","C10N40/08"]

  • 发明/设计人:

    CROM, LORI ANN ， SEDELMEIER, GREGORY J ， PROFILET, ROBERT

  • 权利要求: SP2943 - 12 - C L A I M S 1. A lubricating oil composition comprising at least 80wt%, based on the overall weight of the lubricating oil composition, of base oil, wherein the base oil is selected from Group II, Group III and Fischer-Tropsch derived base 5 oils and mixtures thereof, one or more additives, other than citric acid, selected from the group consisting of anti-wear additives, rust and corrosion inhibitors, dispersants, extreme pressure additives, friction modifiers, viscosity index improvers, pour point 10 depressants, anti-oxidants, and one or more of citric acid and a derivative thereof. 2. A lubricating oil composition as claimed in Claim 1, wherein the lubricating oil composition is formulated for use in a hydraulic fluid. 15 3. A lubricating oil composition as claimed in Claim 1 or Claim 2, wherein the lubricating oil composition comprises at least 85wt%, more preferably at least 90wt%, and no more than 99.5wt% of base oil based on the overall weight of the lubricating oil composition. 20 4. A lubricating oil composition as claimed in any one of Claims 1 to 3, wherein the base oil comprises at least one Fischer-Tropsch derived base oil. 5. A lubricating oil composition as claimed in any one of claims 1 to 4, wherein the one or more additives other 25 than citric acid, selected from the group consisting of anti-wear additives, rust and corrosion inhibitors, dispersants, extreme pressure additives, friction modifiers, viscosity index improvers, pour point depressants, anti-oxidants are present in the lubricating 30 oil composition in an amount in the range of from 0.001wt%to 10.0wt% based on the overall weight of the lubricant oil composition. 6. A lubricating oil composition as claimed in any one of claims 1 to 5, wherein one or more of citric acid and its 5 derivatives is present in or added to the lubricating oil composition in an amount in the range of from 0.005wt% to 0.1wt% relative to the overall weight of the lubricating oil. 7. A lubricating oil composition as claimed in any one of 10 claims 1 to 6, wherein said lubricating oil composition has a kinematic viscosity at 40˚C in the range of from 20 to 75 mm2/s, more preferably in the range of from 30 to 75 mm2/s, most preferably in the range of from 40 to 75 mm2/s. 8. The use of an additive selected from one or more of 15 citric acid and its derivatives in a lubricating oil composition comprising at least 80wt% based on the overall weight of the lubricating oil composition of base oil, wherein the base oil is selected from Group II, Group III and Fischer-Tropsch derived base oils and mixtures thereof 20 and one or more additives, other than citric acid, selected from the group consisting of anti-wear additives, rust and corrosion inhibitors, dispersants, extreme pressure additives, friction modifiers, viscosity index improvers, pour point depressants, anti-oxidants, in order 25 to improve the air release properties of said lubricating oil composition as measured by ASTM D3427. 9. The use according to claim 8, wherein the air release properties are improved with no worsening of the foaming performance as measured by ASTM D892. 30 10. The use according to claim 8 or claim 9, wherein the air release properties are improved with no worsening of the demulsification performance as measured by ASTM D1401.

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