Colloidal products containing calcium and/or magnesium, as well as sulfur and nitrogen, their preparation and their use particularly as additives in lubricating oils
US5462682A · kind A · utility
2Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Colloidal products containing calcium and/or magnesium plus sulfur and nitrogen are obtained by at least partial neutralization of the basicity reserve of at least one overbasic sulfonate charged with calcium carbonate and/or with magnesium carbonate dispersed within micelles. The neutralization is by means of at least one functional dicarboxylic acid of the formula: ##STR1## where each symbol a is a whole number from 1 to 8, x and z are each a number from 1 to 4, y is a whole number from 0 to 4 and n is 1 or 2. These products can be used as additives in lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.