Sulfurized metallic dithiophosphates and their use as additives for lubricating oils
US4293430A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 29, 1980 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Feb 29, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/253
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Metallic dithiophosphates obtained by the sulfurization of a composition containing: PA1 (A) from about 100 to 20 percent by weight of a metallic dithiophosphate of the formula: ##STR1## in which R.sub.1 is an alkenyl or unsaturated cycloaliphatic radical, R.sub.2 and R.sub.3 are alkyl radicals, m is equal to the valence of the metal M, and M represents a metal of Groups IIB, IIIB, IVB, or VIII of the Periodic System of the Elements, preferably zinc; PA1 (B) from about zero to 80 percent of an R.sub.4 -COOR.sub.5 alkyl ester in which R.sub.4 is an alkenyl radical and R.sub.5 an alkyl radical, by means of 0.5 to 10 percent by weight of sulfur, referred to the composition to be sulfurized. Use as extreme-pressure and anti-wear additives for lubricating oils, in an amount of between about 0.3 and 15 percent of the weight of lubricating oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.