Agip Petroli

Euron S.p.a.

Snamprogetti

Consiglio Nazionale Delle Ricerche

Ministero Dell 'universita'e Della Ricerca Scientifica E Technologica

Ministero Dell `universita` E Della Ricerca Scientific E Technologica

Paolo Koch

Alberto Santambrogio

Paola Gambini

Stefano Maiorana

Emilio Perrotti

Emilio Gatti

Giampaolo Gerbaz

Orazio Pianta

Fulvio Giavazzi

Luciano Mattei

Alfonso Di Serio

Gabriella Brandi

Antonio Tontodonati

Piero Dalla Croce

Clara Baldoli

A description follows of an additive for lubricating oils which is a viscosity-index improver, with dispersing properties and stable towards fluoroelastomers, having a greater shear stability and improved rheological behaviour at low temperature. The above additive is prepared by the polymerization of a composition of particular poly(meth)acrylates.

Multifunctional additive for lubricating oils compatible with

Oil-soluble additives with dispersant properties inert towards fluoroelastomers are described, prepared by reacting an alkyl or alkenyl disuccinimide with an anhydride of an unsaturated bicarboxylic aliphatic acid or the corresponding acid. The reaction is conducted at a temperature of between 130.degree. and 170.degree. C. The molar ratio of anhydride to disuccinimide is between 1.05 and 1.95

Oil-soluble adducts of disuccinimides and anhydrides of unsaturated

Viscosity index improver and friction modifier additive constituted by a on-containing poly-(alkyl)-acrylate, process for preparing said additive and use of said additive in the formulation of lubricating oils.

Boron-containing additive for lubricating oils, and process for

A lubricating oil viscosity index improvement additive with dispersant and ntioxidant properties of general formula: ##STR1## where R' is hydrogen or an alkyl, R.sub.a and R.sub.b are alkyl radicals, R.sub.c is a nitrogenated alkyl radical and x, y and z represent relative quantities. The invention also relates to the process for preparing said additive and lubricating oil compositions which contain it.

Multifunctional additive for lubricating oils

Detergent additive for liquid fuels, obtained by means of the trans-esterification of a tertiary amine bearing at least two hydroxy functions, with a dialkyl carbonate and a higher aliphatic alcohol, and process for preparing said detergent additive.

Detergent additive for fuels

An additive for fuels and lubricating oils with detergent, dispersant and anti-rust properties is described, consisting essentially of the product of condensing a mixture of alkenylsuccinic acids or anhydrides of formula (I) ##STR1## where m and n, mutually independently, represent 0 or a whole number between 1 and 10 and are such that their sum is 9 or 10, and &gt;R is &gt;O or (--OH, --OH), with triethylenetetramine of formula (II)

Detergent, dispersant and anti-rust additive for fuels and lubricating

The alkali-metal and alkaline-earth-metal salts are disclosed of a monoester of a bicarboxy acid having the formula: ##STR1## wherein R is alkyl, R.sup.1 is either hydrogen or alkyl, R.sup.2 is alkyl and A is nothing or alkylene, and the corresponding hyperbasic derivatives, useful as detergent additives for lubricants. Also the lubricating compositions containing such additives are disclosed.

Compounds useful as detergent additives for lubricants and lubricating

Multifunctional additive for lubricating oils consisting of a base copolymer and of monomers grafted to said base copolymer;

Multifunctional additive for lubrificating oils and process for the

Dispersing additives for lubricating fluids are disclosed, which contain the oxazoline function and are prepared by reacting amino alcohols with mono or bicarboxylic linear or branched chain aliphatic acids having from 2 to 51 carbon atoms. These additives are characterized by a very high dispersing power which makes them particularly suitable for engines used in stop-and-go service.

Dispersing additives for lubricants, and the method for their preparation

The process for the production of superbasic detergents from sulphonates and/or sulphophenates and an oxide or an hydroxide of an alkali metal or an alkaline earth metal is carried out in the presence of an ester of the carbonic acid, preferably in the presence of dimethylcarbonate.

Process for producing superbasic detergents for lubricant compositions

A ketonic heterocyclic compound having at least two heteroatoms in the ring is prepared by reacting a difunctional compound having the general formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are members of the group consisting of aliphatic, aromatic, cycloaliphatic and heterocyclic hydrocarbons which may contain functional groups selected from --OH, --OR.sub.5, --COOH, --COOR.sub.5, --CN, --Cl, --Br, --I, --F, and --CO--R.sub.5, wherein R.sub.5 is an aliphatic, aromatic, cycloaliphatic or heterocyclic hydrocarbon; X is oxygen or sulphur; Y is sulphur or nitrogen; n is an integer ranging from 1 to 3, or zero; R.sub.6 is a hydrogen or a hydrocarbon radical included in the above definition of R.sub.1 R.sub.2 R.sub.3 and R.sub.4 ; and m is the valence of Y, with carbon monoxide and oxygen in the presence of a catalyst selected from selenium, selenium compounds and complexes of copper, in the temperature range of from room temperature to 80.degree. C and in the pressure range of from 1 to 10 atmospheres.

Growing community of inventors

Melegnano, Italy

Paolo Koch