Basic Zinc Double Salts of O,O-Dialkyl Hydrogen Phosphorodithioates

Bacon, W. E.; Bork, John F.

doi:10.1021/jo01051a532

Cited by 16 publications

(3 citation statements)

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“…However, the ionic liquid term was not well-known during those days. 17 In lubricant industry, zinc dithiophosphates (ZDDPs) are considered to be most successful additives owing to their antiwear, oxidation inhibition, extreme-pressure and friction-reducing properties. 18 Over the last two decades, several studies have been made to replace the use of ZDDP as lubricant additive because of its toxicity to aquatic wildlife, adverse effects to human-health and poisoning of automotive exhaust gas catalyst components.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Since, then several studies have been made on different types of ionic liquids, applying them as lubricants and lubricant additives. − Prior to these studies on lubrication properties of ionic liquids as additives, liquid zinc salt of O,O-dialkyl hydrogen phosphorodithioates have been applied as lubricant additives during 1960s. However, the ionic liquid term was not well-known during those days . In lubricant industry, zinc dithiophosphates (ZDDPs) are considered to be most successful additives owing to their antiwear, oxidation inhibition, extreme-pressure and friction-reducing properties .…”

Section: Introductionmentioning

confidence: 99%

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Halogen-Free Bis(imidazolium)/Bis(ammonium)-Di[bis(salicylato)borate] Ionic Liquids As Energy-Efficient and Environmentally Friendly Lubricant Additives

Gusain

Gupta

Saran

et al. 2014

ACS Appl. Mater. Interfaces

132

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Bis(imidazolium)- and bis(ammonium)-di[bis(salicylato)borate] ionic liquids with variable alkyl chain and cyclic ring structures, were synthesized and then evaluated them as potential lubricant additives. The copper strip test results revealed noncorrosive properties of these ionic liquids. Introduction of halogen content in bis(imidazolium) ionic liquid by replacement of bis(salicylato)borate (BScB) anion with hexafluorophosphate (PF6(-)), severely corroded the copper strip. Thermogravimetric results showed that bis(imidazolium) ionic liquids exhibited higher thermal stability than bis(ammonium) ionic liquids owing to compact structure provided by imidazolium rings, higher intermolecular interactions, smaller free volume and low steric hindrance. The lubrication properties of these ionic liquids as additives to synthetic lubricant poly(ethylene) glycol (PEG 200) were evaluated for steel balls. Results showed that bis(ammonium)- and bis(imidazolium)-(BScB)2 ionic liquids as additives significantly reduced both friction coefficient and wear of PEG 200. The structure of cations, particularly the variation in substituted alkyl chain length monitored the degree of reduction in friction and wear. The excellent lubrication properties were attributed to the formation of adsorbed tribo-thin film and tribochemical product during the tribo-contact. Being halogen-, phosphorus-, and sulfur-free, these ionic liquids (a) protects contact surfaces from tribo-corrosive events, (b) reduces the friction and wear, and (c) keep environment green and clean.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Halogen-Free Bis(imidazolium)/Bis(ammonium)-Di[bis(salicylato)borate] Ionic Liquids As Energy-Efficient and Environmentally Friendly Lubricant Additives

Gusain

Gupta

Saran

et al. 2014

ACS Appl. Mater. Interfaces

132

View full text Add to dashboard Cite

show abstract

“…The proportion of the alcohols was varied, but the average molecular weight was held constant. Note that the average molecular weight corresponded to the molecular weight of [ (f-C4H 90) 2PSS ]3Zn2OH, a crystalline solid, melting at 138-140°C and practically insoluble in mineral oil (Bacon and Bork, 1962).…”

Section: Redistribution Mixtures Of [(Ro)2pss]3zn2ohmentioning

confidence: 99%