Thio-bis-(alkyl lactone acid esters) and thio-bis-(hydrocarbyl d

Details Thio-bis-(alkyl lactone acid esters) and thio-bis-(hydrocarbyl d Thio-bis-(alkyl lactone acid esters) and thio-bis-(hydrocarbyl d

1989-08-31

1990-10-23

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D40712

Patent

active

049653750

ABSTRACT:
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-1,2,10,11-tetracarboxylic 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 ragents 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 additive in lubricating compositions, e.g. as varnish inhibiting dispersants for lubricating oils and fuels.

REFERENCES:
patent: 4568756 (1986-02-01), Brois et al.

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