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Naphthenic Rubber Process Oil Definition

Naphthenic RPO is a class of hydrocarbons also referred to as ‘cycloparaffins’. Though their structure is similar to the aromatic ring, these are single bonded thus having a stable structure. Several such hydrocarbon rings may be linked indicating a variety of available grades. Naphthenic Rubber Process Oils has good color stability, solubility & thermal stability. It is extensively uses in the manufacturing of foot wear, LPG tubes, hot water bags, moulded & extruded products. It may be use as a banbury lubricants in Rubber Industries. Their unique colour stability, solubility and good thermal stability makes them ideal for moulded articles, slippers, LPG tubes, floor tiles and…

Naphthenic Rubber Process Oil Benefits

  1. very available and inexpensive
  2. yield medium viscosity
  3. used in Nitriles and other elastomers
  4. Cyclopentane, Cyclohexane
  5. Not very good resistance to oxidation
  6. Lower spill point due to no wax
  7. Lower viscosity index
  8. Higher volatility and thus lower flash point
  9. Higher relative density
  10. Better solubility

Naphthenic RPO General CHARACTERISTICS

Naphthenic oils are generally used for low temperature ranges and when low pour point, especially in hydraulic oils, cooling oils, rubber processing oils, metal oils, in cylinder lubricants for large engines and lubricants.

NO

CHARACTERISTIC

TEST METHOD

VALUE

 

Appearance

ASTM D 4176

BRIGHT & CLEAR

 

Density @ 15 ºC

ASTM D 4052

  1. 850 – 0.900
 

API Gravity @ 60 ºC

ASTM D - 4052

25 Min

 

  Viscosity @ 40 ºC, cSt

ASTM D- 445

  1. 0 – 110.0 CST
 

Flash Point, ºC

ASTM D - 93

210 ºC Min

 

Colour  Saybolt

ASTM D - 156

+20

 

Total Acid Number, mgKOH/gm,

ASTM D - 974

  1. 03 max.
 

Viscosity Gravity Constant

ASTM D - 02501

  1. 800 – 0.830
 

UV Absorbance

ASTM D - 2269

 

  1. 0 Max.

280 – 289

290 – 299

  1. 3 Max.

300 – 329

  1. 3 Max.

330 - 350

  1. 8 Max.
 

Colour  Saybolt

ASTM D - 156

+20

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