Afton Chemical Corporation

Ethyl Corporation

Lee D Saathoff

Samuel Harry Tersigni

Kenji Yatsunami

Hong-Zhi Tang

Marsha J Lester

Mark Thomas Devlin

Naresh Mathur

Nubar Ozbalik

Timothy J Henly

Ian MacPherson

Naresh C Mathur

A lubricant composition comprising lubricating oil and a compound containing phosphorus and an amine of formula I: wherein Ris a hydrocarbon group and at least one of Ris selected from: &#x2014;(C-C)alkyl, &#x2014;(C-C)alkenyl, &#x2014;(C-C)cycloalkyl; R is selected from: &#x2014;(C-C)alkyl, &#x2014;(C-C)alkenyl, &#x2014;(C-C)cycloalkyl; and wherein R, Rand Rare independently selected from: &#x2014;H, &#x2014;(C-C)alkyl, &#x2014;(C-C)alkenyl, &#x2014;(C-C)cycloalkyl, wherein at least one of R, Rand Ris not H; X is O or S; Yand Yare selected from S and O; m is 1 or 2, n is 0 or 1, p is 1 or 2, provided that m+n+p=3 and q=0.8 to 1.2*p, wherein the compound provides at least 48 ppm of phosphorus and a molar ratio phosphorus to nitrogen (P/N) in the range of about 0.40 to about 1.50.

Lubricant composition

There is provided an automatic transmission fluid composition comprising a major amount of a base oil; one or more friction modifiers, wherein total nitrogen content provided by the one or more friction modifiers is greater than or equal to about 300 ppm; and one or more ashless dispersants, wherein the total nitrogen content provided by the one or more ashless dispersants is greater than or equal to about 500 ppm. The automatic transmission fluid may have a kinematic viscosity at 100&#xb0; C. of from about 4 cSt to about 6.5 cSt and a Brookfield viscosity at &#x2212;40 &#xb0; C. of from about 4,000 cP to about 20,000 cP.

Lubricating compositions

A dispersant additive composition, a lubricant composition containing the dispersant additive, a transmission containing the dispersant additive, and a method of providing a versatile lubricating fluid. The dispersant includes a reaction product of a hydrocarbyl substituted carboxylic acid or anhydride and an amine. The reaction product has a nitrogen content up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0:1 to about 0.8:1. The dispersant additive composition is effective to provide an electrical conductivity to a lubricant composition containing the dispersant additive composition and a metal detergent of less than about 1700 pS/m.

Hybrid electric transmission fluid

A power transmission fluid composition having improved characteristics. The fluid may include a base oil and an additive composition, wherein the additive composition includes an ashless dispersant and an oil-soluble aliphatic tertiary amine. The resulting fluid may have improved durability characteristics.

Power transmission fluids

A clean performing gear oil for use in transmission oils and axle lubricants is provided. The gear oil having a Brookfield Viscosity at -12.degree. C. ranging from about 1,000 to about 150,000 cP, comprises a base oil having a kinematic viscosity at 100.degree. C. ranging from about 4.0 to about 41.0 cSt. Combined with the base oil is preferably a dispersant pour point depressant and/or a dispersant viscosity index improver. In a further preferred embodiment, the gear oil is essentially devoid of carboxylic-type ashless dispersants (e.g., succinimide dispersants) and Mannich base dispersants, thus realizing a cost saving over conventional gear oils which are used as transmission and axle lubricants. Functionalized polymethylacrylates (PMA) are disclosed as agents that improve the properties of the gear oil and allow for the omission of conventional dispersants.

Clean performing gear oils

The present invention relates to a clean gear boron-free gear additive employing a boron-free ashless dispersant, a sulfur source and a phosphorus source. More particularly, the preferred boron-free ashless dispersant is a hydrocarbyl succinimide. This additive composition when blended with a suitable base oil meets MT-1 and MIL-PRF-2105E requirements without the need for boron. MT-1 is a requirement for a clean gear manual transmission oil. MIL-PRF-2105E is a requirement for a rear axle oil.

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Glen Allen, VA, United States of America

Lee D Saathoff