Multi‐steps synthesis and properties of tetraurea grease

Abstract

Purpose

Modern technology is giving some new requirements for the lubricating grease, and there are also some weaknesses for the existing diurea grease, especially its lower anti‐shear stability. This paper aims to address this issue. In this work, in order to meet the new industrial requirements and improve the weaknesses of diurea grease, the tetraurea grease has been synthesized.

Design/methodology/approach

Tetraurea grease was synthesized by multi‐steps, characterized by FT‐IR, NMR, ESI‐MS. The properties were evaluated by the ASTM method, such as dropping point, penetration, oil separation and shear stability, as well as four‐ball machine experiment.

Findings

The result shows that tetraurea grease is indeed synthesized successfully and it has a better performance than the existing diurea grease, the main properties of it have been increased, such as high‐temperature performance, structural stability, anti‐shear stability and extreme pressure performance.

Originality/value

This enriches the kinds of polyurea grease. Enhanced lubricating grease performance would have better industrial prospects, and a larger application field than existing diurea grease.

Citation

Lei, L. and Hongwei, S. (2011), "Multi‐steps synthesis and properties of tetraurea grease", Industrial Lubrication and Tribology, Vol. 63 No. 6, pp. 453-455. https://doi.org/10.1108/00368791111169043