Oxidative Stability of Acylated and Hydrogenated Ricinoleates Using Synthetic and Natural Antioxidants

Table 1

Physicochemical properties of bio-based lubricants, castor oil and mineral oil.

Samples	Specific gravity (g/cm^3)	Pour point (°C)	Flash point (°C)	TAN (mg·KOH/g)	Viscosity (cSt)		Viscosity index
					40°C	100°C
Castor oil	0.9582	−15	286	1.080	261.3	19.60	84
BL1	0.9033	−42	264	0.021	17.6	4.31	159
BL2	0.9138	−36	258	0.025	18.3	4.33	152
BL3	0.9120	−27	268	0.018	26.0	5.57	161
BL4	0.9084	−18	260	0.015	38.4	7.29	157
Mineral oil	0.8931	−33	160	0.001	19.8	4.12	108