Estolides Synthesis Catalyzed by Immobilized Lipases

Table 2

Comparison between the properties of the product obtained after reaction with oleic acid and methyl ricinoleate using Novozym 435 (6 wt.%) at 80°C and those of commercial lubricants.

Lubricant	Viscosity at 40°C (cSt)	Viscosity at 100°C (cSt)	Viscosity index
Product of this study (oleic acid + methyl ricinoleate)	23.9	5.2	153
Light neutral solvent	30–40	5	125
Medium neutral solvent	40–50	7	95
Heavy neutral solvent	70–300	10–20	95
Mineral oil Spindle 09	10.7	2.7	95
Lubrax Unitractor^a	54	9.3	156

^aBiodegradable synthetic ester marketed by BR for tractors.