Mixed anhydrides of alkylxanthic and phosphorus-containing acids as antiwear additives for lubricating oils

1972 ◽  
Vol 8 (1) ◽  
pp. 69-71
Author(s):  
L. S. Kharchenko ◽  
Yu. T. Gordash
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils ◽  
Phosphorus Containing ◽  
Mixed Anhydrides

Study of phosphorus-containing compounds as anti-seize and anti-wear additives for transmission and engine oils

2021 ◽  
Vol 05 ◽  
pp. 15-22
Author(s):  
N.N. Novotrozhina ◽  
◽  
Yu.B. Ramazanova ◽  
G.A. Gakhramanova ◽  
B.I. Musayeva ◽  
...  
Keyword(s):  
Functional Groups ◽  
Dithiophosphoric Acid ◽  
Lubricating Oils ◽  
Engine Oils ◽  
Phosphorus Containing ◽  
Acid Esters ◽  
Petroleum Oils

Dithiophosphoric acid esters containing various functional groups have been synthesized. On the basis of allyloxybenzyl- and allyloxymethylbenzylchlorides, as well as sodium diisopropyldithiophosphate, allyloxybenzyl- and allyloxymethylbenzyldialkyldithiophosphates were obtained, respectively. 5-methyl-2-hydroxyphenylcarbonylmethyldiisopropyldithiophosphate was synthesized by the interaction of 5-methyl-2-hydroxy-chloroacetophenone and sodium diisopropyldithiophosphate. The synthesized compounds were studied as anti-wear and anti-seize additives for lubricating oils. Were also investigated their thermo-oxidative and anticorrosive properties. It was found that all synthesized compounds provide an improvement in the anti-wear and anti-seize properties of petroleum oils, and the efficiency depends on the presence of certain functional groups in the molecules of additives.

Effect of magnetic field on tribological performances of two lubricating oils with phosphorus-containing additives

2017 ◽  
Vol 30 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Zeqi Jiang ◽  
Jianhua Fang ◽  
Boshui Chen ◽  
Kecheng Gu
Keyword(s):  
Magnetic Field ◽  
Lubricating Oils ◽  
Phosphorus Containing

New ashless antiwear additives for lubricating oils

1979 ◽  
Vol 15 (8) ◽  
pp. 601-603 ◽  
Author(s):  
T. A. Rogachevskaya ◽  
V. L. Lashkhi ◽  
A. B. Vipper ◽  
T. G. Malysheva ◽  
E. V. Kaidala ◽  
...  
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils

Certain aspects of the mechanism of antiwear additives for lubricating oils

1976 ◽  
Vol 12 (9) ◽  
pp. 723-727 ◽  
Author(s):  
V. L. Lashkhi ◽  
A. B. Vipper ◽  
A. A. Markov ◽  
V. A. Trofimov ◽  
F. N. Ermolov
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils

scholarly journals Tribofilm Formation, Friction and Wear-Reducing Properties of Some Phosphorus-Containing Antiwear Additives

2020 ◽  
Vol 68 (3) ◽  
Author(s):  
Juli Felicio Luiz ◽  
Hugh Spikes
Keyword(s):  
Friction And Wear ◽  
Film Formation ◽  
Antiwear Additives ◽  
Wear Properties ◽  
Metal Compounds ◽  
Small Component ◽  
Mild Wear ◽  
Phosphorus Containing ◽  
Ashless Additives ◽  
Almost All

Abstract The film-forming, friction and wear properties of a range of model and commercial ashless P and P/S antiwear additives have been studied. A method has been developed for removing the tribofilms formed by such additives in order to effectively quantify mild wear. In general the P/S additives studied formed thinner tribofilms but gave lower wear than the S-free P ones. In extended wear tests, three P/S additives gave wear as low, or lower, than a primary zinc dialkyldithiophosphate (ZDDP). For almost all lubricants tested the wear rate measured in short tests was considerably higher than that in long tests due to the greater contribution of running-in wear in the former. This highlights the importance of basing antiwear additive choice on reasonably long tests, where running-in becomes only a small component of the wear measured. It has been found that for both P and P/S ashless additives the addition of oil-soluble metal compounds based on Ti and Ca boosts tribofilm formation and can lead to very thick films, comparable to those formed by ZDDP. However, this thick film formation tends to be accompanied by an increase in mixed friction and also does not appear to reduce wear but may even increase it.

Phosphorus containing mixed anhydrides—their preparation, labile behaviour and potential routes to their stabilisation

2012 ◽  
Vol 10 (18) ◽  
pp. 3677 ◽  
Author(s):  
Jacorien Coetzee ◽  
Graham R. Eastham ◽  
Alexandra M. Z. Slawin ◽  
David J. Cole-Hamilton
Keyword(s):  
Phosphorus Containing ◽  
Mixed Anhydrides
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