ABSTRACTS & BIOS 2504
Wednesday, June 11
Do Dispersant VMs Benefit High-Temperature Rerefined Grease? This study investigates whether dispersant viscosity modifiers (VMs), known for their ability to inhibit high temperature wear and oxidation damage in heavy duty diesel engine oil, can extend the high temperature life of greases. These functionalized polymers are able to build viscosity in light oils while providing the ability to inhibit the damaging effects of oxidation, soot, and thin oil films at high temperature. Different dispersant viscosity modifiers were including styrene block copolymers and amine-grafted olefin copolymers were screened against conventional formulations on a novel high temperature bearing test rig to see if the dispersant functionalities are active in preventing changes to the grease that lead to loss of lubricant and bearing failure. This work builds on past developments for the rerefined base oil with viscosity modifier strategy for building sustainable and affordable greases that meet the rising demands of industry. The findings offers valuable perspectives for formulators, manufacturers, and end-users seeking to optimize grease performance and extend bearing life under extreme conditions. Dr. Erik Willett serves as the President of Functional Products Inc., a lubricant additive company specializing in polymer-based technology, located in Northeast Ohio. He holds a Doctorate in Polymer Science from the University of Akron and a Bachelor’s in Chemistry from the University of Connecticut. His achievements include receiving the prestigious PCC Gonsalves Memorial Award, the NLGI Author Award for Development, and the Award for Educational Excellence.
- 68 NLGI Spokesman | VOLUME 89, NUMBER 1 | March/April 2025