Rubber Process Oil (RPO):
The most important item of rubber process oil (RPO) is the kinematic viscosity @ 100° ,kinematic viscosity at 100° c. Can be vary from 10 up to 70, most preferable viscosity is between 30 and 60. When the kinematic viscosity is lower than 10, ordinary properties of a vulcanized rubber are decreased. When it is higher than 70 process ability and an operability in blending with a rubber become poor. Especially, in case of an aromatic vulcanized rubber, when the rubber process oil having this range of the kinematic viscosity is appropriately used according to properties of the rubber, the prevention of bleeding of a plasticizer from the vulcanized rubber can be improved. The kinematic viscosity is measured according to astm d 445.
Paraffinic RPO :
Paraffinic process oil well-known according to its viscosity which meet ASTM D-445 with HS code 27079900. This class of hydrocarbons constitutes branched chain or straight linked hydrocarbon molecules of various viscosities. As the chain length increases, the viscosity increases and the rubber process oil (furfural extract RPO) becomes more viscous. They find extensive usage in Butyl rubbers. Paraffinic process oils with high viscosity and high flash point is better shelf life of the end product. Because paraffinic Furfural ekstrakt has higher viscosity and paraffinic content are preferred for achieving high retention of properties after ageing and higher loading of oil in applications like heat resistant / steam hoses and conveyor belts.
Aromatic RPO :
Aromatic extender oil well-known according to its viscosity which meet ASTM D-445 and Kinematic viscosity of transparent and opaque liquids HS code 27079900 it has different grades famous as high(heavy) , medium , low(light) viscosity, TDAE , MES and DAE .
The primary characteristics of aromatic hydrocarbons are the presence of the double bonded mix ring carbon structure. Aromatic furfural extract rubber process oil (RPO) procured from selected refineries and suitably blended to meet stringent specifications, are used for compounding batches to manufacture tyres, lactic , automotive tyres and tubes, bi-cycle tyres, tyre re-treading materials, belting, hoses, battery casings and containers, extruded products, technical molded goods and rubber articles with reclaim rubber due to high solvency., calendared and moulded sheets, Tread rubber TDAE oil.also process oil (furfural extract) has a colour stability, solubility and good thermal stability makes RPO ideal for moulded articles, slippers, LPG tubes, floor tiles, etc.
Naphthenic are 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. Naththenic rubber process oil has unique colour stability, solubility and good thermal stability makes them ideal for moulded articles, slippers, LPG tubes, floor tiles, etc.