Bio-Based Polyols from Seed Oils for Water-Blown Rigid Polyurethane Foam Preparation

Table 1

Characteristics and fatty acid composition of sesame seed oil and pumpkin seed oil.

	Sesame seed oil	Pumpkin seed oil
Color (naked eyes)	Light brown	Dark green
Viscosity (at 25°C, cps)	136 ± 3	160 ± 6
Acid value (mg KOH/g)	7.23 ± 0.18	2.13 ± 0.14
Water content (wt%)	0.08	0.09
Fatty acid  (FA) profile (wt%)
Palmitic acid (C16:0)	11.40	13.04
Stearic acid (C18:0)	4.30	4.60
Oleic acid (C18:1)	37.00	34.82
Linoleic acid (C18:2)	47.30	47.55
Total unsaturated FAs	84.30	82.37