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
US5470495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1993 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Nov 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.