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Valérie Doyen

Denis Lancon

Isabelle Rogues De Fursac

Modestino De Feo

Gregory Chao

Florence Bredon

Jean-Marie Bourmaud

Denis Lançon

Chantal Herault

Céline Chalancon

Jean-Baptiste Martin

Jean-Claude De Wit

Benmedakhene Imane Haihal

The present invention relates to the use of a copolymer (C) comprising repeat units corresponding to alkyl methacrylate monomers, said monomers comprising at least one or more monomer(s) (A), the same or different, selected from among (C6-C10) alkyl methacrylate monomers; one or more monomer(s) (B), the same or different, selected from among (C10-C18) alkyl methacrylate monomers, in a lubricant composition comprising at least one base oil for reducing and/or controlling abnormal gas combustion in an engine, preferably a marine engine or a controlled-ignition engine.

Method for reducing and/or controlling abnormal gas combustion in a marine engine or a controlled-ignition engine

A product resulting from the reaction of at least: a hydroxybenzoic acid, optionally substituted by a hydrocarbyl group, or an alkali and/or alkaline earth metal salt thereof, a boron compound, a polyalkylamine component selected from triamine and tetramine compounds. Also, a lubricant composition including this product. Use of this product as a lubricant for two-stroke marine engines and four-stroke marine engines, more preferably two-stroke marine engines.

Compound comprising polyamine, acidic and boron functionalities and its use as a lubricant additive

A lubricant for marine engine, notably for a two-stroke marine engine. More particularly, a lubricant for a marine engine including at least one lubricant base oil and at least one di-alkylaminopolyalkylamine.

Lubricant for a marine engine

A product resulting from the reaction of at least: a hydroxybenzoic acid substituted by a hydrocarbyl group, a boron compound, and a quaternary ammonium salt. A lubricant composition including this product. Use of this product as a lubricant for two-stroke marine engines and four-stroke marine engines, more preferably two-stroke marine engines.

Compound comprising quaternary monoammonium, acidic and boron functionalities and its use as a lubricant additive

A product resulting from the reaction of at least: a hydroxybenzoic acid, optionally substituted by a hydrocarbyl group, a boron compound, an amine component selected from compounds including two or three amine functions, wherein at least one amine function is substituted by at least one hydrocarbyl group. A lubricant composition including this product. Use of this product as a lubricant for two-stroke marine engines and four-stroke marine engines, more preferably two-stroke marine engines.

Compound comprising pol y amine, acidic and boron functionalities and its use as a lubricant additive

A product resulting from the reaction of at least: a hydroxybenzoic acid, optionally substituted by a hydrocarbyl group, a boron compound, an amine component selected from a di-fatty-alkyl(ene) polyalkylamine composition including one or more polyalkylamines of formulae (I) or (II). A lubricant composition includes this product. Use of this product as a lubricant for two-stroke marine engines and four-stroke marine engines, more preferably two-stroke marine engines.

The invention relates to the use of one or more fatty amines that are soluble in a lubricant composition comprising at least one detergent in order to reduce and/or control the abnormal combustion of gas in a marine engine, the amine/detergent weight 1-1 ratio being between 0.01 and 0.5. The invention also relates to a process for reducing and/or controlling the abnormal combustion of gas in a marine engine in which the gas is in contact with one or more fatty amines that are soluble in a lubricant composition comprising at least one detergent, the amine/detergent weight ratio being between 0.01 and 1, preferably between 0.01 and 0.9, more preferentially between 0.02 and 0.8, for example between 0.03 and 0.8, in particular between 0.01 and 0.5, preferably between 0.01 and 0.4, for el example between 0.02 and 0.4.

Use of a fatty amine for reducing and/or controlling the abnormal combustion of gas in a marine engine

One or more fatty amines are soluble in a lubricating composition for preventing and/or reducing the metal losses of the parts of an engine, such as a marine engine. The parts are brought into contact with the lubricating composition in order to prevent or reduce the metal losses.

Use of a fatty amine for preventing and/or reducing the metal losses of the parts in an engine

Relating to the field of lubricant, more particularly relates to lubricant for marine engine, notably for a two-stroke marine engine. More particularly, relates to a lubricant for a marine engine including at least one lubricant base oil and at least one fatty amine.

Lubricant for a two-stroke marine engine

A lubricant composition for engines has at least one base oil and one fatty amine.

Lubricant for marine engines

The present disclosure relates to a lubricant for marine engines including at least one base oil, at least one overbased detergent, at least one neutral detergent and at least one fatty amine.

Lubricant for marine engine

A cylinder lubricant having a BN determined according to the standard ASTM D-2896 greater than or equal to 15 milligrams of potash per gram of lubricant, including: one or more lubricant base oils for marine engines, at least one detergent based on alkali or alkaline-earth metals, overbased with metallic carbonate salts, at least one neutral detergent, one or more oil-soluble alkoxylated fatty amines, having a BN determined according to the standard ASTM D-2896 comprised between 100 and 600 milligrams of potash per gram, where the percentage by mass of alkoxylated fatty amines with respect to the total weight of lubricant is chosen such that the BN provided by these compounds represents a contribution comprised between 2 and 8 milligrams of potash per gram of lubricant, and where the BN provided by the metallic carbonate salts represents a contribution of at the most 65%.

Cylinder lubricant for a two-stroke marine engine

The present invention relates to a cylinder lubricant having a BN, determined according to the ASTM D-2896 standard, of greater than or equal to 40 milligrams of potassium hydroxide per gram of lubricant, comprising a lubricant base oil for a marine engine and at least one overbased detergent that is based on alkali or alkaline-earth metals, and which also contains an amount of 0.01% to 10% by weight relative to the total weight of the lubricant, of one or more compounds (A) chosen from esters of saturated fatty monoacids comprising at least 14 carbon atoms and of alcohols comprising at most 6 carbon atoms.

Marine lubricant

The present invention for a two-stroke marine engine, which can be used with both high-sulphur content fuel oils and low-sulphur content fuel oils. It relates to a cylinder lubricant having a BN determined according to the standard ASTM D-2896 greater than or equal to 40 milligrams of potash per gram of lubricant, comprising a lubricant base stock for marine engines and at least one overbased detergent based on alkali metals or alkaline-earth metals, characterized in that it also contains a quantity of 0.01% to 10% preferably 0.1% to 2% by weight relative to the total weight of the lubricant, of one or more (A) compounds chosen from the primary, secondary or tertiary monoalcohols the alkyl or alkylene chain of which is saturated or unsaturated, linear or branched and comprises at least 12 carbon atoms. This lubricant has a sufficient neutralization capacity vis-&#xe0;-vis the sulphuric acid formed during the combustion of high-sulphur fuel oils, while limiting the formation of deposits during the use of low-sulphur fuel oils.

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Four, France

Valérie Doyen