Thio-bis-(alkyl lactone acid esters) and thio-bis-(hydrocarbyl diacid esters) are useful additives for lubricating compositions
Thio-bis-(Hydrocarbyl substituted diacid materials), such as thio-bis-(Polyalkyl lactone acid) and/or their precursors, the adducts of sulfur chloride and unsaturated diacid materials, E.G. , 4,8-bis-polyalkyl-4,8-dichloro-6-thiaundecane-1,2,10,11tetracarboxylic acid bis-anhydride and their dehydrochlorinated analogs, when esterified with an alcohol, preferably a polyol, such as pentaerythritol, polypentaerythritol or a polyalkylene glycol with or without acid catalysts and/or metal template reagents yield thio-bis-(Alkyl lactone acid esters) and thio-bis(Hydrocarbyl diacid esters) which can be characterized in part, as macrocyclic and/or macrocyclic-like structures, are useful as stable additives in lubricating compositions, E.G. As varnish inhibiting dispersants for lubricating oils and fuels.
- Assignee:
- Exxon Research And Engineering Co
- Patent Number(s):
- US 4239636
- OSTI ID:
- 6796802
- Country of Publication:
- United States
- Language:
- English
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