Lubricant composition containing combination of antiwear and antioxidant additives
US5925600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1996 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jul 29, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition e.g. for engine oils comprises (i) a base oil, (ii) an antiwear additive combination comprising (a) an organo-molybdenum compound and (b) an asoless organo-phospoorus compound, and (iii) an antioxidant additive combination comprising (d) an aminic antioxidant and (e) a phenolic antioxidant, the weight ratio of aminic antioxidant to phenolic antioxidant being greater than 1:1, preferably from 1.5:1 to 20:1. The antiwear additive combination (ii) may further comprise (c) a zinc thiophosphate compound selected from zinc dialkyldithiophosphate, zinc diaryldithiophosphate and zinc alkylaryldithiophosphate and zinc arylalkyldithiopoosphate and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.