公开(公告)号：US20190085256A1

公开(公告)日：2019-03-21

申请号：US16123161

申请日：2018-09-06

Applicant: ExxonMobil Research and Engineering Company

Inventor： Rajeev KUMAR ,  Kevin J. BUZDYGON ,  Kathleen K. COOPER ,  David A. BLAIN ,  David G.L. HOLT

IPC: C10M101/02 ,  C10M137/10 ,  C10M133/48

Abstract: The present disclosure provides a lubricating composition that includes at least one lubricating base oil, an effective amount of at least one overbased detergent; and an effective amount of at least one thermally stable zinc dialkyl dithiophosphate. The disclosure further provides methods of making and using the same.

公开(公告)号：US20190086383A1

公开(公告)日：2019-03-21

申请号：US16123089

申请日：2018-09-06

Applicant: ExxonMobil Research and Engineering Company

Inventor： Walter D. VANN ,  Kathleen K. COOPER ,  Spyridon KORRES ,  Samuel FLORES-TORRES ,  Bhaskar PRABHAKAR ,  Erik HERZ

IPC: G01N33/28 ,  G01N21/25 ,  G01N33/30 ,  G01N27/60

Abstract: Methods are provided for in-situ detection of varnish and/or deposit precursors in a lubricant in a lubricating environment. An electrostatic accumulator can be used within a lubricating environment to enhance accumulation of varnish and/or deposit precursors on portions of the electrostatic accumulator. The deposits accumulated on the electrostatic accumulator can then be characterized in-situ. The potential difference across portions of the electrostatic accumulator can cause an enhanced rate of deposit accumulation on the electrostatic accumulator, which can facilitate characterization of the tendency of a lubricant to accumulate deposits in the lubricating environment.

公开(公告)号：US20190040335A1

公开(公告)日：2019-02-07

申请号：US16053958

申请日：2018-08-03

Applicant: ExxonMobil Research and Engineering Company

Inventor： Alessandro Di MAIO ,  David A. RACKE ,  Kathleen K. COOPER

IPC: C10M169/02 ,  C10M101/02 ,  C10M119/12 ,  C10M119/16

Abstract: The present disclosure provides a lubricating composition with improved high-pressure pumpability and/or reduced viscosity at high pressures, as well as method of making and using the same. The lubricating composition includes a white oil and a polymeric thickener present in an amount equal to or less than about 40 wt % of the lubricating composition. The white oil has a kinematic viscosity of at least one of: about 80 mm2/sec to about 120 mm2/sec at 40° C. and/or about 9.5 mm2/sec to about 14 mm2/sec at 100° C.