Institut Francais Du Pe'trole

Francoise Dixmier

Maurice Born

Bruno Delfort

Jacques Garapon

Jacques Lallement

Jacques Denis

Jean-Claude Hipeaux

Pierre Marchand

Bertrand Daoudal

Monique Prigent

Anti-wear and high pressure lubricating compositions with a major proportion of lubricating oil and a minor proportion of at least one amine phosphate containing a terminal imide ring result from the reaction, under conditions for the formation of an amine salt, of at least one phosphate having the general formula (I): ##STR1## in which n is equal to 1 or 2, R.sup.1 is a divalent hydrocarbon group with 1 to 32 carbon atoms, R.sup.6 represents a hydrogen atom or a monovalent hydrocarbon group containing usually from 1 to 200 carbon atoms, with at least one amine.

Lubricating compositions containing an amine phosphate with a terminal

Colloidal products according to the invention are obtained by a method comprising a step (a) providing a colloidal product containing at least one alkaline earth metal carbonate in micelle form, optionally reacted with at least one compound selected from alkylsulphonic acids and alkylarylsulphonic acids and salts thereof and long chain aliphatic carboxylic acids and salts thereof such as to modify a proportion of up to 70% of the basicity reserve of the original colloidal product and a step (b) in which the residual basicity reserve is neutralized by at least one acid containing at least one element selected from boron, phosphorus and sulphur. These colloidal products can be used as wear resistance and extreme pressure additives in lubricants.

Colloidal products containing calcium and/or magnesium, as well as boron

Growing community of inventors

Sceaux, France

Francoise Dixmier