Blown Castor Oil
Blown or oxidized castor oil is prepared by blowing air or oxygen into it at temperatures of 80 – 1300C, with or without catalyst to obtain oils of varying viscosity .The process is called oxidative polymerization. This increases the viscosity and specific gravity of the oil.
Blown castor oil is available in the standard viscosity 5-10 poise, 20-25 poise, 30-35 poise, 45-55 poise, 90-110 poise.
Applications:
· Blown castor oil is a potential replacement for phthalates and is used primarily as a plasticizer for lacquers, inks, adhesives, hydraulic fluids and leathers.
· Castor oil has been long used as a plasticizer for celluloid and in lacquers but the blown oil has been discovered to perform better.
Chemical, Physical Properties and Specifications:
|
Colour Gardner |
Acid Value |
Hydroxyl Value |
Iodine Value |
Saponification Value |
Viscosity Gardner- Holdt/Strokes |
Z-1 |
6 Max |
12-16 |
151-158 |
69-73 |
200-220 |
Z-1/25-35 |
Z-6 |
12 Max |
10-17 |
130-140 |
56-65 |
210-230 |
Z-5,6/100-150 |
Z-8 |
16 Max |
11-16 |
125-135 |
58-66 |
220-245 |
Z-8/450-600 |