Through selection of the acid and alcohol components, custom esters can be designed for use in fire-resistant hydraulic fluids that meet all performance requirements and approvals without the use of polymer-based additives. This makes new polyol ester fluids available for applications that require new FM Approval and/or seventh Luxembourg Report approval and where operators prefer not to use fluids that contain water or phosphate ester. Elimination of polymer additives reduces a fluid's susceptibility to losing viscosity in systems with very high shear. The chemical nature of these new polyol ester bases also makes them readily biodegradable for applications that require environmentally friendly fluids. Fluid lifetime and cold-weather performance are superior to that of vegetable-derived fluids.
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