润滑科技信息平台

专利摘要

本发明提供一种疲劳寿命长且低粘度的变速器用润滑油组合物,其含有基础油和烯烃共聚物,且所述烯烃共聚物的质均分子量为5,000以上且30,000以下, 烯烃共聚物的流体力学半径为1.00nm以上且5.00nm以下,并且基于组合物总量的烯烃共聚物的含量为1.0质量%以上且8.0质量%以下; 以及该组合物的制造方法、使用变速器用润滑油组合物的润滑方法以及变速器。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US17/601800
申请日期:
2020-04-22
专利申请人:
分类号:
C10M143/04 ; C10M169/04 ; C10M101/00 ; C10N40/04 ; C10N20/02 ; C10N20/04 ; C10N20/06 ; C10N30/02
发明/设计人:
TAMURA, KAZUSHI
权利要求: 1. A lubricating oil composition for transmissions comprising a base oil and an olefin copolymer, wherein the mass-average molecular weight of the olefin copolymer is 5,000 or more and 30,000 or less, the hydrodynamic radius of the olefin copolymer is 1.00 nm or more and 5.00 nm or less, and the content of the olefin copolymer based on the total amount of the composition is 1.0% by mass or more and 8.0% by mass or less.2. The lubricating oil composition for transmissions according to claim 1, satisfying the following numerical formula (1):25.00≤−23.00×Rh2+139.00×Rh+4.75×C−179.88 (1)wherein:Rh is a hydrodynamic radius of the olefin copolymer (nm),C is a content of the olefin copolymer based on the total amount of the composition (% by mass).3. The lubricating oil composition for transmissions according to claim 1, wherein the hydrodynamic radius of the olefin copolymer is 2.00 nm or more and 4.00 nm or less.4. The lubricating oil composition for transmissions according to claim 1, wherein the 100° C. kinematic viscosity of the base oil is 1.0 mm2/s or more and 15.0 mm2/s or less.5. The lubricating oil composition for transmissions according to claim 1, wherein the base oil is a mineral oil.6. The lubricating oil composition for transmissions according to claim 1, having a 100° C. kinematic viscosity of 10.0 mm2/s or less.7. The lubricating oil composition for transmissions according to claim 1, which is for automatic transmissions or continuously variable transmissions.8. A lubricating method using a lubricating oil composition for transmissions of claim 1.9. The lubricating oil composition for transmissions according to claim 1, wherein the 100° C. kinematic viscosity of the olefin copolymer of 2.1 mm2/s or more and 2.8 mm2/s or less.10. A method for producing a lubricating oil composition for transmissions, comprising blending a base oil and an olefin copolymer having a mass-average molecular weight of 5,000 or more and 30,000 or less and having a hydrodynamic radius (Rh) of 1.00 nm or more and 5.00 nm or less, in such a manner that the content (C) of the olefin copolymer based on the total amount of the composition can be 1.0% by mass or more and 8.0% by mass or less.11. The method for producing a lubricating oil composition for transmissions according to claim 8, wherein the components are blended so as to satisfy the following numerical formula (1):25.00≤−23.00×Rh2+139.00×Rh+4.75×C−179.88 (1)wherein:Rh is a hydrodynamic radius of the olefin copolymer (nm),C is a content of the olefin copolymer based on the total amount of the composition (% by mass).