Lubricant Additives

14 Lubricant Additives: Chemistry and Applications

TABLE 1.2Structure, Physical Properties, and Typical Applications of Commercial Hindered Phenols for LubricantsPhenols

Structure

Melting Point (°C)

Solubility (in mineral oils)

Applications

2,6-Di-

tert

-butyl-phenol

OH

36–37

>

5

Industrial oils, power transmission fl uids, greases, fuels

2,6-Di-

tert

-butyl-4-methylphenol (BHT)

OH

69

>

5

Industrial oils, power transmission fl uids, food grade lubricants, greases

(3,5-Di-

tert

-butyl-4-

hydroxyhydrocinnamate)methane

HO

OCH

2

C

O

4

110–125

0.1–0.5

Industrial oils, food grade lubricants, greases

Octadecyl 3-(3

′,5

′-di-

tert

-butyl-4

′-

hydroxyphenyl)propionate

HO

OC

18

H

37

O

50–55

>

5

Industrial oils, eco-friendly oils