Glycerol-containing functional fluid

a functional fluid and glycerol technology, applied in the field of functional fluids, can solve the problems of fluid friction coefficients that tend to decline, and achieve the effect of reducing friction

Inactive Publication Date: 2012-06-28
CHEVRON ORONITE CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]The present invention is directed to a method of reducing friction comprising contacting a metal surface with a functional fluid comprising a major amount of an oil of lubricating viscosity and greater than about 0.05 wt-% glycerol.

Problems solved by technology

However, the friction coefficient of fluids has a tendency to decline due to the temperature effects as the fluid heats up during operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0067]The invention will be further illustrated by the following examples, which set forth particularly advantageous method embodiments. While the Examples are provided to illustrate the present invention, they are not intended to limit it. This application is intended to cover those various changes and substitutions that may be made by those skilled in the art without departing from the spirit and scope of the appended claims.

example a

[0068]A baseline formulation was prepared which contained:[0069](i) 1.85 wt % of a 27 TBN oil concentrate of a Ca sulfonate detergent;[0070](ii) 1.89 wt % of a 320 TBN oil concentrate of a Ca sulfonate detergent;[0071](iii) 1.39 wt-% of an oil concentrate of a zinc dithiophosphate derived from a primary alcohol; and[0072](iv) the balance, a Group II base oil.

example c (comparative)

[0074]A lubricating oil composition was prepared by top-treating the baseline formulation of Example A with 0.5 wt. % of a sodium borate dispersion.

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Abstract

A functional fluid comprising a major amount of an oil of lubricating viscosity, and greater than about 0.05 wt-% glycerol. A method of preparing a functional fluid comprising adding glycerol to a functional fluid, wherein the glycerol is not glycerol monooleate. A method of preparing an additive concentrate comprising adding glycerol to a diluent oil wherein the concentrate contains from about 1% to about 99% by weight of said diluent. A method of reducing friction comprising contacting a metal surface with a functional fluid comprising a major amount of an oil of lubricating viscosity and greater than about 0.05 wt-% glycerol.

Description

FIELD OF INVENTION[0001]The present invention relates to functional fluids useful in systems requiring power transmission fluids, hydraulic fluids and / or lubrication of moving parts. In particular, the present invention relates to a functional fluid containing an organic friction modifier for use in tractor hydraulic fluids.BACKGROUND OF THE INVENTION[0002]Modern lubricating oil formulations are formulated to exacting specifications often set by original equipment manufacturers. To meet such specifications, various additives are used, together with base oil of lubricating viscosity. Depending on the application, a typical lubricating oil composition may contain dispersants, detergents, anti-oxidants, wear inhibitors, rust inhibitors, corrosion inhibitors, foam inhibitors, and friction modifiers just to name a few. Different applications will govern the type of additives that will go into a lubricating oil composition.[0003]A functional fluid is a term which encompasses a variety of ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M137/02C10M135/10C10M129/74
CPCC10M129/08C10M141/10C10N2240/08C10N2230/52C10N2230/06C10M2223/045C10M2219/106C10M2219/068C10M2219/046C10M2215/08C10M2215/042C10M2201/087C10M2203/1025C10M2207/022C10M2207/028C10M2207/046C10M2207/289C10M2209/084C10N2210/02C10N2210/06C10N2210/01C10N2030/06C10N2030/52C10N2040/08C10N2010/12C10N2010/02C10N2010/04
Inventor LI, YUE-RONGWALKER, DEANE S.MCDOUGALL, PATRICK J.NELSON, KENNETH
Owner CHEVRON ORONITE CO LLC
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