The Lubrizol Corporation

Stephen J Cook

Alexandra Mayhew

Daniel J Saccomando

Ewan E Delbridge

Mark C Davies

William R S Barton

Michael R Sutton

Yanshi Zhang

Jolanta Z Adamczewska

Gary M Walker

Paul R Vincent

Shawn Dickess

Shaun P Carney

Natasha K Horn

Paul E Adams

David J Moreton

John Kent Pudelski

James P Roski

Christopher L Friend

Mohamed G Fahmy

Joanne L Jones

David Price

Rodney John McAtee

David M Hobson

Chor Huang

Jayasooriya Sujith Perera

W Preston Barnes

Nicolas Proust

Mark F Wilkes

William Barton

Edward P Sampler

David Cressey

Lisa Blanazs

Jamal Kassir

Helena M Cressey

Richard Leahy

Samuel M Kilsby

Natasha Horn

William RS Barton

Shawn P Dickess

Rodney J Mcatee

Alexandria Mayhew

A lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of a substantially sulfur-free alkyl phosphate amine salt, where at least 30 mole percent of the phosphorus atoms are in an alkyl pyrophosphate salt structure, exhibits good antiwear performance. In the phosphate amine salt, at least 80 mole percent of the alkyl groups are typically secondary alkyl groups of 3 to 12 carbon atoms.

Alkyl phosphate amine salts for use in lubricants

A lubricant composition comprising an oil of lubricating viscosity and about 0.01 to about 5 percent by weight of a (thio)phosphoric acid salt ('phos-amine salt') of at least one hydrocarbyl amine. The hydrocarbyl amine may be a hindered hydrocarbyl amine, an aromatic hydrocarbyl amine, or a combination thereof.

The invention provides a method of lubricating a 2-stroke marine diesel cylinder liner with a lubricating composition having a total base number of 10 to 25 mg KOH/g. The invention further provides a lubricating composition for lubricating the 2-stroke marine diesel cylinder liner.

Marine diesel lubricating composition

A lubricating composition suited to use in a marine diesel engine includes an oil of lubricating viscosity and an amino carboxylate compound of formula (I): NRR&#x2014;((CHR)NR)&#x2014;(CHR)&#x2014;COY, where Rand Rare independently selected from &#x2014;(CHR)&#x2014;COY', H, and CCalkyl and wherein at least one of Rand Ris &#x2014;(CHR)&#x2014;COY&#x2032;; or wherein NRRis a cyclic structure; Y and Y&#x2032; are independently selected from &#x2014;OR, NHR, and &#x2014;N(R); each Ris independently selected from C-Calkyl and C-Calkenyl; R, Rand Rare independently selected from H and C-Calkyl; Ris selected from H, C-Calkyl, and (CHR)NH; x is from 2 to 4; and n is at least 1, except where NRRis a cyclic structure, where n is at least 0.

Michael adduct amino esters as total base number boosters for marine diesel engine lubricating compositions

A lubricating composition includes an oil of lubricating viscosity and an N-substituted hydroxyaromatic succinimide or a salt thereof.

Hydroxyaromatic succinimide detergents for lubricating compositions

The invention provides a process to prepare a detergent in the presence of a polyether compound. The invention further provides for a lubricating composition containing the detergent. The invention further relates to the use of the lubricating composition in a mechanical device such as an internal combustion engine.

Lubricating composition containing a detergent

The invention provides a lubricant composition comprising an oil of lubricating viscosity and 0.01 wt % to 15 wt % of a (thio)phosphoric acid salt of an N-hydrocarbyl-substituted gamma- (&#x3b3;-) or delta-amino(thio)ester. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.

Lubricant composition containing an antiwear agent

A lubricant composition containing a metal-containing detergent in an amount to provide at least about 2 TBN to the lubricant, and a dispersant comprising an oleophilic portion comprising at least about 40 carbon atoms and an acid-bearing portion, characterized in having a TAN:TBN ratio of at least about 0.8, exhibits good TBN retention.

Lubricants with good TBN retention

A lubricating composition containing an oil of lubricating viscosity, a high molecular weight polyolefin that is at least substantially free of ethylene-derived monomer units, and an overbased metal containing detergent, is capable of reducing intake valve deposits in a direct injection engine.

Lubricating oil composition with anti-mist additive

The present invention relates to a lubricating composition, particularly marine diesel engine lubricating compositions, comprising: (a) an oil of lubricating viscosity; (b) an asphaltene dispersant comprising an amide group, which may also contain a succinimide group, and which may optionally be used in combination with additional asphaltene dispersants that contain a cyclic headgroup that contains a nitrogen atoms where the additional asphaltene dispersants may also include a succinimide group; and (c) a detergent derived from an alkyl phenol. The invention further provides methods of using such compositions in the operation of engine, particularly marine diesel engines.

Asphaltene dispersant containing lubricating compositions

A marine diesel cylinder is lubricated using a lubricant having a total base number (TBN) of at least about 25, comprising an oil of lubricating viscosity and a metal-containing detergent component. Forty to 90 percent of the TBN derived from the metal-containing detergent component is provided by calcium detergent; 5 to 40 percent of the TBN by sodium detergent; and 5 to 45 percent by magnesium detergent. At least 50 weight percent of the total detergent substrate is sulfonate and less than 50 weight percent is monomeric or oligomeric substrate comprising one or more units of alkyl-substituted phenol having an alkyl group of 8 to 14 carbon atoms. The lubricant is useful when the marine diesel engine is fueled with a liquid fuel containing at least 2 ppm vanadium.

Marine diesel cylinder lubricant

A turbo-charged, sump-lubricated internal combustion engine which is susceptible to contamination of lubricant with liquid fuel, may be lubricated with a lubricant which contains an amount of a rust inhibitor effective to reduce the deterioration of said lubricant and turbo sludge formation.

Rust inhibitors to minimize turbo sludge

A turbo-charged, sump-lubricated internal combustion engine which is susceptible to contamination of lubricant with liquid fuel, is lubricated with a lubricant which contains an amount of an aminic antioxidant, optionally in the absence of a phenolic antioxidant, thereby reducing the deterioration of said lubricant and formation of turbo sludge.

Aminic antioxidants to minimize turbo sludge

The invention provides a lubricating composition containing an oil of lubricating viscosity and a hydrogenated copolymer of an olefin block and vinyl aromatic block, wherein the copolymer is optionally functionalized. The invention further provides a method for preparing a hydrogenated copolymer; and the use of the lubricating composition.

Polymer and lubricating compositions thereof

The invention provides a method of lubricating a marine diesel engine, comprising supplying to said engine a marine diesel cylinder lubricant composition at a feed rate of 0.3 to less than 1.2 g/kW hr, wherein said lubricant composition has a ratio of /&#x3a3;(wt % overbased detergent)/&#x3a3;(wt % of boron from antiwear additives+wt % of phosphorus-containing antiwear additives) of greater than 12.5. The invention further provides a method capable of imparting improved cleanliness and decreased cylinder wear; and reduced deposits.

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Belper, United Kingdom

Stephen J Cook