Composition and method of manufacturing calcium magnesium sulfonate greases
US10519393B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Sep 28, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A sulfonate-based grease composition and method of manufacture comprising (1) addition of both overbased calcium sulfonate and overbased magnesium sulfonate in a ratio range of 60:40 to 100:1, with the magnesium sulfonate added all at once, a portion prior to conversion and another portion after conversion, and/or one more delay periods between the addition of water or other reactive ingredient and the addition of magnesium sulfonate; (2) one or more delay periods between the addition of at least a portion of a facilitating acid and at least a portion of the next subsequently added ingredient; (3) no conventional non-aqueous converting agents added prior to conversion; or (4) a combination thereof. The grease has a high dropping point and reduced thickener yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.