公开(公告)号：US20190136147A1

公开(公告)日：2019-05-09

申请号：US16177610

申请日：2018-11-01

Applicant: ExxonMobil Research and Engineering Company

Inventor： David G.L. HOLT ,  Spyridon KORRES ,  David A. RACKE ,  Samuel FLORES-TORRES ,  Tabassumul HAQUE ,  Candice I. PELLIGRA

IPC: C10M171/02 ,  C10M169/04 ,  C10M101/02 ,  C10M111/04 ,  C10M107/02 ,  C10M133/44 ,  C10M129/40 ,  C10M129/08 ,  C10M133/16

Abstract: The present disclosure relates generally to lubricating compositions and methods of making and using the same. Specifically, the present disclosure relates to lubricating compositions and method of making and using the same for modifying friction at a metal-elastomer contact, and therefore improving at least one of elastomer lifetime, reducing elastomer wear, reducing metal wear, reducing energy consumption or a combination thereof. More specifically, one aspect of the present disclosure relates to lubricating compositions including at least two base oils with a viscosity difference between the first and second base oils; another aspect of the present disclosure relates to lubricating compositions comprising an additive that can modify friction at a metal-elastomer contact.

公开(公告)号：US20190127658A1

公开(公告)日：2019-05-02

申请号：US16151454

申请日：2018-10-04

Applicant: ExxonMobil Research and Engineering Company

Inventor： Candice I. PELLIGRA ,  Smruti A. DANCE ,  Jordan C. SMITH

IPC: C10M169/04 ,  C10M105/32 ,  C10M105/06 ,  C10M129/54 ,  C10M135/10 ,  C10M141/08

Abstract: A method for improving wear control of a steel surface lubricated with a lubricating oil through the generation of fast-forming tribofilms. The method includes: (i) using as the lubricating oil a formulated oil, the formulated oil having a composition comprising at least one lubricating oil base stock as a major component, and at least one detergent, as a minor component; and (ii) forming a tribofilm on the steel surface. The time for the tribofilm to reach 95% of its saturation coverage (t95,sat) on the steel surface is less than about 50 minutes, as determined by a high frequency reciprocating rig (HFRR) in accordance with a modified version of ASTM D6079. A lubricating oil including an ester base stock, an alkylated naphthalene base stock, or mixtures thereof, as a major component; and at least one detergent including an alkaline earth metal salicylate, an alkaline earth metal sulfonate, or mixtures thereof, as a minor component.

公开(公告)号：US20190127654A1

公开(公告)日：2019-05-02

申请号：US16151481

申请日：2018-10-04

Applicant: ExxonMobil Research and Engineering Company

Inventor： Candice I. PELLIGRA ,  Smruti A. DANCE ,  Douglas E. DECKMAN ,  Steven KENNEDY

IPC: C10M105/32 ,  C10M105/06 ,  C10M101/02 ,  C10M107/02 ,  C10M129/68 ,  C10M129/54 ,  C10M129/34 ,  C10M133/16 ,  C10M135/10 ,  C10M155/04

Abstract: A method for improving wear control of a steel surface lubricated with a lubricating oil through the generation of thick tribofilms. The method includes: (i) using as the lubricating oil a formulated oil, the formulated oil having a composition comprising at least one lubricating oil base stock as a major component; and at least one lubricating oil additive, as a minor component; and (ii) forming a tribofilm on the steel surface. In time-step tribofilm formation measurements of the lubricating oil by a mini-traction machine (MTM) at constant slide-to-roll ratio (SRR), the saturation traction coefficient (fs), which correlates to tribofilm thickness on the steel surface, is greater than about 0.11. In the method of this disclosure, elongation of timing chain due to wear of chain link pins is less than about 0.07%, as determined by Ford Chain Wear (FCW) test conducted in accordance with ILSAC GF-6 specification. The lubricating oils are useful in internal combustion engines.