Rubber process oils

In the broadest sense, any compounding ingredient added to rubber to reduce the cost of the compound. The use of the term is now usually limited to certain cheap petroleum rubber processing oils. 

In rubber compounding, the addition of a high proportion (40-50 phr) of a rubber processing oil to an elastomer with the object of improving the processibility of a tough polymer and/or cheapening the compound. 

Rubber process oils can be classified using the VGC classification ... 

Process Oils, Plasticizers. Petroleum-based rubber process oils generally contain a mixture of paraffinic, naphthenic, and aromatic components. These oils vary in composition from grade to grade, but most contain some unsaturated moieties and this unsaturation can compete with the polymer for curatives. Therefore, state of cure can be decreased. This is not easily detected because oil softens the compound which masks the loss of state of cure. 

For rubbers, process oils, which are simply some hydrocarbons, function to plasticise the system (polybutenes are plasticisers in polybutadiene rubber based membranes used for roofing systems). 

Refers to an empirical analysis of rubber process oil composition that expresses the percentages of carbon atoms in aromatic, naphthenic, and paraffinic components, respectively. See Rubber Oil, Aromatic, Naphthene, Paraffin. 

Ratio of the velocity of light at a specified wave length in air to its velocity in a substance under examination. The refractive index can be determined by test method ASTM D642, using a refractometer and a monochromatic light source. Refractive index is an excellent test for uniform composition of solvents, rubber process oils, and other petroleum products. It may also be used in combination with other simple tests to estimate the distribution of naphthenic, paraffinic, and... 

Any petroleum process oil used in the manufacture of rubber and rubber products. Rubber oils may be used either as rubber extender oils or as rubber process oils. Rubber extender oils are used by the synthetic rubber manufacturer to soften stiff elastomers and reduce their unit volume cost while improving performance characteristics of the rubber. Rubber process oils are used by the manufacturer of finished rubber products (tires, footwear, tubing, etc.) to speed mixing and compounding, modify the physical properties of the elastomer, and facilitate processing of the final product. 

For rubbers, process oils, which are simply hydrocarbons, do plasticise the system. 

Recently, a group of Indian researchers developed a new elastomer product based on NR/BR blend with reclaim rubber (RR) from ground rubber tires (GRT). The reclaiming was carried out by tetra methyl thiuram disulfide (TMTD) in the presence of spindle oil, a paraffin-based rubber process oil. Thermogravimetric analysis of RR, NR/BR and different NR/BR/RR vulca-nizates was carried out in order to measure the thermal stability of the vulca-nizates. Isothermal ageing test of fresh rubber RR composites showed that the ageing performance of RR containing vulcanizates are superior than that of the fresh rubber vulcanizates, which do not contain any reclaimed rubber. 

The assembly of concentric bush components which involve an interference fit between the inner rubber core and the inner and outer metal cylinders, can be lubricated by the application of a small amount of a rubber process oil. This will reduce the risk of damaging the Chemosil film during component assembly. Process oils such as Circolight Oil (Sun Oil Company) or Petrofina 2059 (Petrofina UK Ltd.) are suitable. 

Lower cost general purpose bagasse-rubber composite formulations are identical to those for the fire-retarded formulation, except that a non-chlorinated rubber processing oil (e.g., Sun-dex 790) is substituted for the chlorinated paraffin oil, no... 

Also, certain grades of paraffinic oils are lighter and clearer in color than other types of rubber processing oils. Some grades of paraffinic oil are colorless. This is very important when manufacturing rubber products that are light in color where appearance is important. As a result, paraffinic oils cost more to manufacture than... 

At one time the principal influence on the American rubber process oil market was Sun Oil with familiar trademarks Circosol, Sundex, Sunpar, and Sunthene. In recent years many changes have taken place. Exxon Mobil increased their presence and... 

In the area of hydrocarbon rubber process oils, straight paraffinic grades are essentially innocuous and safe mineral oils. The aromatics content and molecular configuration of the naphthenic and aromatic oils have been examined extensively and severe hydro-treating and solvent extraction has upgraded most of the naphthenic product used in the rubber industry today while the highly aromatic extracts need to be labeled as carcinogenic. 

Common name hydrotreated naphthenic rubber process oil ... 

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