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)
RPO (Rubber Process Oil)
Characteristic Test Method Value
Heavy Light

Kinematic Viscosity @ 100 oC (cSt)

ASTM D445 35 min 35 max

Density @ 15 oC

ASTM D1298 1.050 1.010

Flash Point ( oC)

ASTM D93 200-230 200-230

RI @ 70 oC

ASTM D1218 1.56 1.55

RPO 145
RPO 145
Characteristic Test Method Result
Grade 145
Type Aromatic
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


  • Bulk
  • Brand New and/or Used Reconditioned Iron Drums

Rubber Process Oil Application:

Rubber processing oils (RPOs) are organic substances which are usually added to polymers to improve the process ability of such polymers. Further advantages of the RPOs are increments in desirable polymer properties, such as softness, elongation and low-temperature flexibility. Moreover, the RPOs provide the rubber compounds with lowered intermolecular forces, and so a lower glass transition temperature (Tg )1,2.

  • As component in rubber formulations and manufacturing of products such as automobile tires, rubber shock absorbers, footwear, industrial hoses, wire and cable coverings, flooring materials and carrier fluid or solvent in manufacture of adhesives, sealants, polishes and carbon black
  •  To improve physical properties of vulcanizatio to reduce the cost of finished rubber compounds
  •  Efficient secondary plasticizers in order to reduce cost
  •  Used as a Lubricant in Rubber Processing
  •  Production of Diesel
  • Used in manufacturing of White Oil
  •  Used as a component in Ink Production

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