Kenneth H Macleod

US Patent:

20210040411, Feb 11, 2021

Filed:

Feb 8, 2019

Appl. No.:

16/969136

Inventors:

- Shelton CT, US
Joseph Stieber - Prospect CT, US
Kenneth Cory MacLeod - Prospect CT, US

Assignee:

LANXESS Solutions US Inc. - Shelton CT

International Classification:

C10M 129/72
C10M 133/16
C10M 137/10
C10M 169/04

Abstract:

Certain citric esters and amides, and certain mixtures thereof, e.g., mixtures comprising citrate oligomers, exhibit excellent anti-wear activity in lubricants. Many of these compounds or mixtures of compounds also exhibit a high degree of anti-wear synergy in combination with zinc dihydrocarbyldithiophosphates. The compounds of the invention are thus valuable tools that can allow one to reduce the amounts of zinc, and phosphates, that are used in the lubricant without sacrificing anti-wear performance.