Colloidal alkaline or alkaline-earth carbonates containing a compound of calcium, phosphorus and sulphur in micellar form
US5693597A · kind A · utility
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19Claims
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Key dates
| Filing date | Apr 19, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Apr 19, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Colloidal products are described which comprise micelles of alkaline metals or alkaline-earth metals, held in the colloidal state by at least one alkaline metal or alkaline-earth metal alkyl- or alkylarylsulphonate. The products further comprise micelles of a product containing calcium, phosphorus and sulphur resulting from the in situ reaction of calcium oxide or calcium hydroxide with a phosphorus sulphide, in particular tetraphosphorus decasulphide, and water. These colloidal products are used as antiwear and extreme pressure additives for lubricating greases and oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.