| abstract |
The present invention relates to a method for making a storage stable lubricant additive concentrate containing a silicone antifoaming agent. The method utilizes a high-speed in-line mixer to impart hydraulic and mechanical shear to the lubricant additive concentrate, resulting in improved dispersion of the antifoaming agent within the concentrate. The lubricant additive concentrate produced is storage stable, and when diluted with an oil of lubricating viscosity, results in lubricants and functional fluids having improved antifoaming properties. The silicone antifoaming agent and remaining ingredients of the concentrate form a micro-emulsion. |