The Lubrizol Corporation

Mary F Salomon

Jack L Karn

John M Cahoon

Kirk E Davis

Scott T Jolley

Richard M Lange

Mary Galic

Mark R Baker

William R S Barton

Craig D Tipton

Joseph W Pialet

William Barton

Michael E Huston

Franklin Paul Abbott

Donald J Marn

Julie A Edgar

Thomas R Smith

Michael Huston

Julie Edgar

The present invention relates to a lubricating composition containing an oil of lubricating viscosity and a dimercaptothiadiazole salt of a copolymer comprising units derived from monomers (i) an ?-olefin and (ii) an ethylenically unsaturated carboxylic acid or derivatives thereof (typically carboxylic acid groups or an anhydride), are partially esterified with an alcohol, or mixtures thereof, and wherein at least a portion of carboxylic acid groups not esterified are reacted with an amine. The invention further provides for a lubricating composition containing said copolymer. The invention further provides a method and use of lubricating composition in a mechanical device.

Functionalized copolymers and lubricating compositions thereof

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

The invention relates to a composition, comprising: at least one basic alkali metal salt of at least one hydrocarbyl-substituted acidic organic compound, wherein the hydrocarbyl group is derived from a polyalkene having an Mn of at least 600, provided that when the organic compound is a sulfonic acid, the polyalkene has an Mn of at least 900; and provided that when the acidic organic compound is a mixture of acidic organic compounds containing a carboxylic acid and a sulfonic acid which has a hydrocarbyl group derived from a polyalkene having an Mn of less than 900, then the carboxylic acid comprises at least 10% of the equivalents of the mixture. Methods for preparing the salts and lubricating compositions containing the salts are described.

Overbased alkali salts and methods for making same

Functional fluids characterized as effective over a wide range of temperature including very high temperatures can be prepared, comprising:

Functional fluids useful at high temperatures

The present invention deals with a particular antiemulsion agent which is useful in retarding foam and/or emulsion formation in an engine. In particular, the agent is effective at preventing or retarding emulsion or foaming in an engine oil.

Antiemulsion/antifoam agent for use in oils

This invention describes various compositions obtained from thiodiglycol or thiodiglycol polymers. The compositions have unique antioxidant capability and are useful in a variety of functional fluids, hydraulic fluids, automatic transmission fluids and generally in oils of lubricating viscosity such as crankcase oils or greases.

Antioxidant products

This invention describes lubricant compositions comprising phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

N-substituted thio alkyl phenothiazines

This invention describes phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.

A thermal oxidatively stable synthetic fluid composition is disclosed. The composition is essentially comprised of an aromatic carboxylic acid ester of the general formula ##STR1## wherein Ar is an aromatic moiety, R is a neo hydrocarbyl group containing from about 5 to about 18 carbon atoms, with the proviso that R is not a cycloalkyl substituted neo hydrocarbyl group, R.sub.1 is a mono, di, tri or tetra functional hydrocarbyl group containing from 1 to about 18 carbon atoms, n is an integer from about 2 to about 4 and represents the total number of carboxylic acid ester groups on the aromatic moiety, a is an integer from about 1 to about 4, when a is 1 R.sub.1 is monovalent, when a is 2 R.sub.1 is divalent, when a is 3 R.sub.1 is trivalent and when a is 4 R.sub.1 is tetravalent, R.sub.2 is a hydrocarbyl group derived from a diol containing from about 2 to about 18 carbon atoms and x is an integer from 0 to about 4.

Thermal oxidatively stable synthetic fluid composition

The present invention deals with a particular antiemulsion agent which is useful in retarding foam and/or emulsion formation in an engine. In particular, the agent is effective at preventing or retarding emulsion of foaming in an engine oil.

The present invention deals with compositions containing sulfur and oxygen which are useful in lubricants and automatic transmission fluids.

Growing community of inventors

Cleveland Heights, OH, United States of America

Mary F Salomon