Effect of dicarboxylic acid esters on selective transfer under friction was written by Chigarenko, G. G.;Ponomarenko, A. G.;Barchan, G. P.;Belevantseva, Z. P.. And the article was included in Khimiya i Tekhnologiya Topliv i Masel in 1984.Product Details of 1190-39-2 This article mentions the following:
The addition of dialkyl dicarboxylic acid esters to lubricating oils increase the maximum loading stress before the start of rapid wear (P) and decreases both the friction coefficient (f) and wear (w, 5 h at 0.8 m/s sliding rate, steel 45/bronze bearing). Thus, P,f, and w of a Soviet industrial oil were 19 MPa, 0.096, and 0.0234 g, resp., but when the oil contained 30% dinonyl adipate (I) [151-32-6] P,f, and w became 54 MPa, 0.010, and 0.0017 g, resp. Similar, but less pronounced, lubricity improvement was obtained when instead of I lower mol. diesters were added to the oil. A spectroscopic examination of the spent, I-containing, oil identified copper adipate [50603-05-9]. Thus, the diesters form salt films on the bearing surfaces. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Product Details of 1190-39-2).
malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Product Details of 1190-39-2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics