Ethyl Corporation

Afton Chemical Corporation

Afton Chemical Japan Corp.

Jeffrey L Milner

Roger M Sheets

Nubar Ozbalik

Anthony J Rollin

Rodney I Barber

Kenji Yatsunami

Ronald L Phillips

John M Pietras

David R Ellis

Peter L Leitner

Masao Seki

The present disclosure relates to a lubricant composition comprising a first phosphorus compound, a second phosphorus compound, and a third phosphorus compound, wherein the first phosphorus compound is present in the lubricant composition in an amount to provide between about 120 and 350 ppm phosphorus. The lubricant composition may provide robust anti-wear and reduced pitting.

Combinations of phosphorous-containing compounds for use as anti-wear additives in lubricant compositions

There is disclosed a Super Tractor Oil Universal lubricating composition comprising an oil of lubricating viscosity formulated with an additive package comprising at least one metal detergent, at least one phosphorus-based wear preventative, and at least one molybdenum compound. Methods for improving the braking performance of a tractor and the anti-wear protection of a tractor engine are also disclosed.

High TBN / low phosphorus economic STUO lubricants

In its broadest concept, the present invention relates to an improved gear oil comprising:

Extended drain, thermally stable, gear oil formulations

Gear oils meeting GL-5 specifications are obtained by blending a base oil, a thermally stable phosphorus-containing anti-wear agent; and a metal-free sulfur-containing extreme-pressure agent; wherein the thermally stable phosphorus-containing anti-wear agent is present in an amount sufficient to provide from 100 to 350 ppm phosphorus to the formulated gear oil and wherein the metal-free sulfur-containing extreme-pressure agent is present in an amount sufficient to provide at least 10,000 ppm sulfur to the formulated gear oil and wherein the formulated gear oil contains 350 ppm of phosphorus or less.

Low phosphorus clean gear formulations

Sulfurized phosphorous compounds, which are effective anti-wear, extreme pressure agents, may be formed without odor by reacting phosphorous compounds with other reactive sulfur sources, including elemental sulfur, before addition of polysulfides. The process of the present invention yields a lubricant additive package which is odor free or very low odor, thermally stable, and which contains polysulfides. Particularly useful embodiments of this invention include low odor gear lubricant additive packages.

Growing community of inventors

Chesterfield, VA, United States of America

Jeffrey L Milner