US 5,470,495 A · Colloidal products containing calcium and/or magnesium, as well as boron and/or phosphorus and/or sulfur, their preparation and their utilization as additives for lubricants

Abstract

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.

Claims28

Dependent claims

A modified colloidal product obtained by a method comprising:

step (a) providing an original colloidal product having a basicity reserve and containing at least one alkaline-earth metal carbonate in micelle form, said original colloidal product having been reacted with at least one compound selected from the group consisting of alkylsulphonic and alkylarylsulphonic acids, salts thereof and long chain aliphatic carboxylic acids and salts thereof in such a way as to modify a proportion of the basicity reserve of the original colloidal product of not more than 70% and
step (b) completely neutralizing the residual basicity reserve of said colloidal product from step (a) with at least one acid containing at least one element selected from the group consisting of boron, phosphorus and sulphur so as to obtain a new micelle devoid of carbonate without affecting the colloidal stability of the resultant product.

Dependencies are inferred from the claim text.

Facts

Application

08/155,509Filed 18 Nov 1993

Priority

FR 92 1393418 Nov 1992

Granted

28 Nov 1995

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C10M 159/24
Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products: containing sulfonic radicals
C10M 159/12
Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution: reaction products
C10M 159/123
Reaction products: obtained by phosphorus or phosphorus-containing compounds, e.g. P x S x with organic compounds
C10M 159/20
Reaction products: reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products

Colloidal products containing calcium and/or magnesium, as well as boron and/or phosphorus and/or sulfur, their preparation and their utilization as additives for lubricants

Life of this patent

Colloidal products containing calcium and/or magnesium, as well as boron and/or phosphorus and/or sulfur, their preparation and their utilization as additives for lubricants

Life of this patent

Abstract

Claims28