The Lubrizol Corporation

Kirk E Davis

Jack L Karn

John M Cahoon

Mary F Salomon

Stephen A DiBiase

Thomas F Holden

James D Burrington

Calvin W Schroeck

Joseph W Pialet

Roger L Sowerby

Stephen A Di Biase

Norman Anthony Meinhardt

Ralph E Kornbrekke

Thomas A Tagliamonte

Scot Eric Jaynes

William C Ward

Emil Thomas Wierber

Kenneth W Lee

Thomas R Smith

Ann E Wykoff

Arthur N Arakelian

Ghebrehiwet N Ghebremeskel

Joseph P Fischer

Benny R Richardson

A coupler is described for use in carbon black filled rubber compositions. The coupler includes an amine group and a thiol group or a polysulfidic linkage. The coupler improves the interaction of the carbon black with the rubber as measured by a decrease in the tan delta at 60&deg; C. while substantially maintaining the tan delta at 0&deg; C.

Carbon black coupler

A lubricating oil composition is described which comprises a major amount of an oil of lubricating viscosity and

Lubricating compositions and concentrates

A lubricating oil composition is described which comprises a major amount of an oil of lubricating viscosity and (A) at least about 1% by weight of at least one carboxylic derivative composition produced by reacting

This invention relates to a lubricating oil composition, comprising:

Lubricating compositions

Copper and sulfur containing compositions, and additive concentrates and lubricating compositions containing the copper and sulfur containing compositions are described. The sulfur compounds have the formula:

Sulfur and copper-containing lubricant compositions

A short-term test procedure for comparing the engine sludge performance of different engine oils to a reference oil. The test procedure involves establishing a base line by operating one or more engines on the reference oil while maintaining a substantially constant volume of the reference oil in the engines without changing the oil until a Coordinating Research Council (CRC) sludge rating within a preferred range of 8.5 to 9.0 is achieved. In like manner, a series of engine tests are performed on one or more test oils using engines substantially identical to the reference oil engines for substantially the same number of miles as the average test miles of all of the reference oil engines under substantially the same test conditions as the reference oil engines while maintaining substantially the same volume of the test oil in the engines as the reference oil without changing the test oil in the engines throughout the tests. The average overall sludge rating for each test oil is then calculated based on all of the tests on each test oil, and compared to the average overall sludge rating for the reference oil to determine relative sludge performance.

Short-term engine oil sludge test

A lubricating oil formulation is described which is useful in internal combustion engines. More particularly, lubricating oil compositions for internal combustion engines are described with comprises (A) at least about 60% by weight of oil of lubricating viscosity, (B) at least about 2.0% by weight of at least one carboxylic derivative composition produced by reacting (B-1) at least one substituted succinic acylating agent with (B-2) from about 0.70 equivalent up to less than one equivalent, per equivalent of acylating agent, of at least one amine compound characterized by the presence within its structure of at least one HN&lt; group, and wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of abotu 1300 to about 5000 and an Mw/Mn value of about 1.5 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups, and (C) from about 0.01 to about 2% by weight of at least one basic alkali metal salt of sulfonic or carboxylic acid. The oil compositions of the invention also may contain (D) at least one metal dihydrocarbyl dithiophosphate and/or (E) at least one carboxylic ester derivative composition, and/or (F) at least one partial fatty acid ester of a polyhydric alcohol, and/or (G) at least one neutral or basic alkaline earth metal salt of at least one acidic organic compound. In one embodiment, the oil compositions of the present invention contain the above additives and other additives described in this specification in amounts sufficient to enable the oil to meet all the performance requirements of the new API Service Classification identified as SG.

Lubricating oil compositions

The present invention describes carbonated overbased products which have been borated. The products have a very small particle size.

Borated overbased material

Lubricating oils are described which are useful in two-cycle engines. These oils contain a minor amount of at least one phenolic compound of the general formula:

Two-cycle engine oils containing sulfurized alkyl phenols

Additive combinations useful in lubricating compositions containing a major amount of an oil of lubricating viscosity are described. The additive compositions comprise a mixture of at least one alkyl phenol and at least one amino phenol, each having at least one hydrocarbon-based group of at least about 10 aliphatic carbon atoms. The additive compositions also are useful in fuel-lubricant mixtures for use in two-cycle internal combustion engines. Generally, the additive combinations also will contain a detergent/dispersant.

Alkyl phenol and amino phenol compositions and two-cycle engine oils and

Lubricating oils are described which are useful in two-cycle engines. These oils contain a minor amount of at least one phenolic compound of the general formula

Two-cycle engine oils containing alkyl phenols

This invention relates to a composition comprising the combination of

Alkyl phenol and amino compound compositions and two-cycle engine oils

Sulfur-containing, oil-soluble compositions are described which are useful as lubricating oil additives, particularly in lubricants containing little or no phosphorus. In one embodiment, the compositions of the invention comprise (A) at least one metal salt of at least one dithiocarbamic acid of the formula

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Euclid, OH, United States of America

Kirk E Davis