The Lubrizol Corporation

Renee A Eveland

John Kent Pudelski

Matthew D Gieselman

Joanne L Jones

Ewan E Delbridge

Patrick E Mosier

David J Moreton

Christopher L Friend

Michael J Covitch

Virginia A Carrick

Barton J Schober

Mary Galic Raguz

Adam J Preston

Matt D Gieselman

William D Abraham

Frederick W Koch

Ewa A Bardasz

Christopher J Kolp

Gordon D Lamb

Nicolas Proust

Douglas M Barr

Philip W Pike

Nicholas Proust

Robert Ian Wilby

William Ellyatt

The disclosed technology relates to ashless compounds exhibiting neutral pH and having sufficient polarity to act as a dispersant. The disclosed technology additionally relates to the use of the ashless compounds in engine lubricants as dispersants for preventing engine deposit without degrading seals or increasing (i.e. contributing to) corrosion.

Pyran dispersants

The disclosed invention relates to a dispersant composition comprising at least one block derived from (i) a polyester of a hydroxy substituted carboxylic acid and at least one block derived from (ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group. The invention also provides lubricating compositions containing the described dispersant as well as methods of making and using the described dispersant, including method of making the dispersant, methods of lubricating an engine with a lubricant containing the described dispersant, and methods of reducing sludge formation in an engine.

Dispersants derived from hydroxy fatty acid polyesters and polyalkylene glycol dispersants

The disclosed technology relates to a dispersant composition comprising the reaction product of a polyolefin acylating agent and an amine terminated or hydroxyl terminated polyether. In addition, the technology relates to lubricating compositions containing the dispersant composition and an optional synergistic amount of another dispersant, as well as methods of employing the dispersant composition in an engine and engine oils.

Amine terminated and hydroxyl terminated polyether dispersants

The invention provides a lubricating composition containing a compound comprising the reaction product of a polyolefin, an ethylenically unsaturated aromatic acylating agent (or carboxylic reactant), and an amine, and an oil of lubricating viscosity. The invention further relates to the use of the lubricating composition in an internal combustion engine.

Lubricating composition containing a dispersant

Reaction of a carboxylic acid-containing polymer with certain aromatic amines and polyols results in ester containing dispersant viscosity modifiers with improved soot handling performance in heavy-duty diesel engines, compared with non-ester containing dispersants.

Ester dispersant composition for soot handling in EGR engines

Reaction of a carboxylic acid-containing polymer with certain aromatic amines results in dispersant viscosity modifiers with improved soot handling performance in heavy-duty diesel engines, compared with reaction with non-aromatic amines.

Dispersant viscosity modifiers containing aromatic amines

A composition of the reaction product of (a) an isobutylene-diene copolymer having thereon groups containing carboxylic acid functionality or reactive equivalent thereof, derived from an &#x3b1;,&#x3b2;-unsaturated carboxylic compound; and (b) an amine component comprising at least one aromatic amine containing at least one N&#x2014;H group capable of condensing with said carboxylic acid functionality, is a useful dispersant viscosity modifier.

Dispersant viscosity modifiers based on diene-containing polymers

Lubricant compositions comprising (a) an oil of lubricating viscosity; and (b) at least one non-metal-containing additive, comprising a nitrogen-containing dispersant having a total base number of at least about 90 are useful for lubricating an internal combustion engine. The lubricants have less than 1.0% sulfated ash and a total base number of at least about 8.5, and at least 30% of the total base number of the composition is provided by non-metal-containing additives. The lubricants exhibit a high TBN without deterioration of elastomeric seals.

Nitrogen-containing dispersant as an ashless TBN booster for lubricants

A dispersant composition comprising the product of an amine, an alcohol, or an amino alcohol, with a hydrocarbyl-substituted succinic anhydride component exhibits improved viscosity stability and reduced chlorine content, when the hydrocarbyl-substituted succinic anhydride component comprises: (a) 10 to 95 weight percent of a component prepared by reacting a polyisobutylene with maleic anhydride in the presence of chlorine; and (b) 5 to 90 weight percent of a component prepared by reacting a polyisobutylene with maleic anhydride in the substantial absence of chlorine.

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Concord Township, OH, United States of America

Renee A Eveland