| abstract |
The present invention relates generally to substantially liquid, chlorine-free, sulfur-bridgednphenols useful as antioxidants and more specifically to the preparation ofnsubstantially liquid, chlorine-free, sulfur-bridged, hindered phenol compositions which areneffective antioxidants in lubricating oils without causing excessive copper corrosion.nThe invention also includes lubricating oils containing an antioxidant additive of thenpresent invention, as well as a method of reducing oxidation in the lubricating oil usednin a machine such as an internal combustion engine. |