Rubber Process Oil is produced by crude oil distillation process obtained from the composition and chemical interactions and isolation material extracted called Raffinate. They are high boiling petroleum fractions obtained in refining after gasoline, fuel oil, and other low boiling compounds are removed by distillation. Process oils are made up largely of ring structures.
Rubber process oils can be broadly classified into three basic groups depending on the physical arrangement of the carbon atoms namely, as follows:
- Paraffinic oils:
Paraffinic oils contain high levels of isoparaffinic molecules. They have less odor and more oxidative stability than naphthenic and aromatic oils.
- Naphthenic oils
Contain a higher level of saturated rings than aromatic and paraffinic process oils. They have similar odor to paraffinic oils.
- Aromatic oils
Aromatic oils contain high levels of unsaturated single- and multiple-ring compounds, stronger odor, lower oxidation stability, and higher reactivity compared to paraffinic and naphthenic oils. Highly aromatic oils are conventionally widely used as process oils for rubber and tire compounds, because they have a good compatibility with both natural and diene-based synthetic elastomers. In addition, they have a low price.
|RPO (Rubber Process Oil)|
Kinematic Viscosity @ 100 oC (cSt)
|ASTM D445||35 min||35 max|
Density @ 15 oC
Flash Point ( oC)
RI @ 70 oC
|Kinematic Viscosity @ 40 oC (mm2/s)||ASTN D7042||—|
|Kinematic Viscosity @ 100 oC (mm2/s)||ASTN D7042||40-50|
|Density 15.6 oC (kg/m3)||ASTM D4052||1020|
|Flash Point (oC)||ASTM D92||240|
|Pour Point (oC)||ASTM D97||Max 27|
|Aniline Point (oC)||ASTM D611||Max 40|
|VGC (Typical)||ASTM D2501||0.97|