Edwin Cooper & Company Limited

Castrol Limited

John Scotchford Elliott

Bryan Terence Davis

Richard Martin Howlett

Herbert Frank Askew

Gerald John Jayne

Colin John Harrington

Monty Frederick Crook

Stephen Norman

Norbornenyl compounds such as dicyclopentadiene are sulfurized by reaction with a controlled amount of sulfur in the absence of a solvent or using a non-polar solvent to give a normally liquid oil-soluble sulfur-containing compound useful as a lubricating oil additive.

Process for sulfurizing norbornenyl compounds

Amides of C.sub.50-200 alkylphenoxy-substituted aliphatic carboxylic acids made by reacting a C.sub.50-200 alkylphenol with a halocarboxylic ester (e.g., butyl chloroacetate) followed by displacement of the ester group with an amide group have a much higher content of amide than a product made using a halocarboxylic acid reactant in place of the ester. The product is an effective lubricating oil dispersant.

Lubricating oil containing reaction products of polyisobutylphenol,

Polyesters suitable for use as lubricant additives are prepared by reacting a di-carboxylic acid or anhydride having a branched chain alkyl or alkenyl substituent containing at least 30 carbon atoms with a compound having the formula: ##STR1## wherein R and R.sup.1 are specified substituents which between them possess from 2 to 6 free hydroxyl groups. Lubricating compositions containing these polyester additives are also described.

Polyester lubricant additives, their preparation and compositions

As novel compounds, orthosilicate esters having the general formula: ##STR1## wherein R.sup.1 is a propylene glycol monoalkyl ether residue containing from 1 to 8 carbon atoms in the terminal alkyl group or is a tertiary alkyl group; each of R.sup.2, R.sup.3 and R.sup.4 is the same or different and is an ethylene or propylene glycol monoalkyl ether residue containing from 1 to 8 carbon atoms in the terminal alkyl group or is a tertiary alkyl group, provided that when R.sup.1 is a propylene glycol monoalkyl ether residue each of R.sup.2, R.sup.3 and R.sup.4 are also propylene glycol monoalkyl ether residues; the total number of carbon atoms in R.sup.1, R.sup.2, R.sup.3 and R.sup.4 being at least 15 and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 being a glycol monoalkyl ether residue. Also disclosed are hydraulic fluids containing the novel compounds.

Hydraulic fluids comprising orthosilicate esters

Bis-substituted phenols bridged through a carbon atom of an aliphatic carboxylic amide or ester are effective ashless dispersants for lubricating oil. Preferably, the phenols are substituted with a high molecular weight poly-alpha-olefin group.

Lubricating oil containing alkanoic amide or ester-bridged hydrocarbyl

Alkylphenoxy alkanoic esters are made in high yield by reaction of a C.sub.50-200 alkylphenol with a halo-substituted alkanoic ester in the presence of a base. The reaction product contains little unreacted alkylphenol and is converted without separation to a reaction mixture containing mainly alkylphenoxy alkanoic amide by reaction with amines. The amide reaction mixture is an effective ashless dispersant for lubricating oil.

Process for making a high molecular weight alkylphenoxy substituted

A heterocyclic phosphorus mono-, di- or polyester has the constitution of the product prepared by reacting an intermediate of specified type with a di- or polyol or derivative thereof capable of yielding the di- or polyol on hydrolysis, said intermediate of specified type being a heterocyclic phosphorus compound having the constitution of the compound prepared by reacting an olefin polymer or copolymer having at least 50 carbon atoms and containing olefinic unsaturation with a phosphorus trihalide in the presence of a Friedel-Crafts catalyst, preferably consisting of an aluminium halide, to form a reaction product having halogen atoms attached to phosphorus, and thereafter reacting the reaction product with a hydroxy compound, preferably water or methanol, to remove one or both of the halogen atoms attached to the phosphorus atom. Lubricating compositions containing the mono-, di- or polyesters of the invention are also described.

Heterocyclic phosphorus compounds

Novel compounds which are amides of bis(phenol substituted)carboxylic acids, or derivatives thereof are described by specified general formula and as reaction products of at least one bis(phenol substituted)carboxylic acid, or derivative thereof, having at least one alkyl substituent of at least 30 carbon atoms on a phenol substituent, and at least one aliphatic, cycloaliphatic or heterocyclic primary or secondary di- or polyamine or a hydroxy alkyl amine. Also described are lubricating compositions containing the novel compounds of the invention.

Lubricant additives, their preparation and compositions containing them

Novel compounds, useful as intermediates in the preparation of lubricant additives, are described by specified general formulae and as condensation products of (i) an alkyl-substituted monohydric phenol, phenol sulphide or alkylene bis-phenol in which the alkyl substituent contains at least 8 carbon atoms and (ii) a carbonyl-substituted compound selected from the group consisting of glyoxylic acid, pyruvic acid, levulinic acid, 3-oxoglutaric acid, 2-oxoglutaric acid and esters of such acids.

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Beaconsfield, United Kingdom

John Scotchford Elliott