Lubricating oil composition containing sulfurized reaction product of mixed tertiary alkyl phenols with formaldehyde
US3992308A · kind A · utility
6Cited by
5References
10Claims
0Family size
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Key dates
| Filing date | Feb 3, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Feb 3, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Organic material is stabilized by addition of a sulfurized product made by heating a mixture of (a) sulfur and (b) a reaction product formed by reacting in the presence of an alkali metal hydroxide catalyst (i) a mixture of at least two different alkylphenols, each having an unsubstituted ortho and/or para position, and (ii) formaldehyde. Preferably, the reaction product is formed in the presence of a small amount of primary lower alkanol such as methanol. When added to lubricating oil the sulfurized products also impart wear and corrosion inhibiting properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.