meeting unique needs.

Current Thermo-Oxidative Stability Issues with Bio-Oils & Biolubricants

The poor oxidative stability of vegetable oils is a major issue that prevents their wide use in industrial applications.  Due to their structural composition as esters of unsaturated fatty acids, the thermo-oxidative stability of bio-oils and bio-lubricants is relatively poor than that of oils and lubricants derived from petroleum. Major vegetable oils used as raw materials for bio-oils and biolubricants include soybean, canola, and corn oil.  Non-food vegetable oils derived from Jatropha and algae oil can also be used.  In bio-oils, oxidation causes a deterioration of product quality during storage, while in biolubricants, oxidation’s reduces stability at elevated temperatures.

The Solution: Innovation with Polnox Technology

Polnox has developed novel antioxidants based on its DT-mPM™ technology to enhance the thermo-oxidative stability of a wide variety of materials including vegetable oils, bio-oils, and biolubricants.

The benefits of our technology include:

  1. Expanding the use of bio-oils and biolubricants in higher performance applications which they would be excluded from due to oxidative instability.

  2. Substituting less oxidatively stable oils in existing biolubricant and biofuel formulations.

  3. Reducing stabilization costs in existing formulations by reducing antioxidant treat levels.

The Benefit of DT-mPM Technology

Figure 1 below shows the thermo-oxidative stability of canola oil treated with Polnox® 8020 vs. commercial antioxidant with concentration ranging from 0.5% to 3%, as measured by OIT in minutes. Performance was evaluated by measuring their thermo-oxidative stability at 150 ˚C (302 ˚F) in the presence of 500 PSI (3,447 kPa) of oxygen by ASTM D6186 method at various antioxidant (AO) treat levels and compared against the commercial AO.

Because of its unique regenerative mechanism, Polnox’s DT-mPM significantly enhances the thermo-oxidative stability of bio-oils, opening doors to use bio-oils and biolubricants in high-performance applications where they are typically excluded due to oxidative instability.  Polnox-treated bio-oils can also substitute less stable bio-oils in existing biolubricant formulations for enhanced performance.

Differentiating Your Product in the Market Place with Polnox

It is easy to differentiate your product in the market place by improving its thermo-oxidative stability with Polnox® 8020.  The enhancement of your biolubricant’s stability depends on the treat level you choose.

Figure 2 below shows significant improvements in a vegetable oil-based commercial biolubricant’s thermo-oxidative stability for various Polnox® 8020 treat levels.  Adding 0.5% Polnox® 8020 can enhance your biolubricant’s thermo-oxidative stability by 131%; adding 2.0% Polnox® 8020 can improve thermo-oxidative stability by 200%.

Greater performance can be seen depending on the quality of the base stock oil of your biolubricant.  For example, in polyol-ester base stock oil, 0.3% Polnox® 8020 enhances thermo-oxidative stability by 200%.

View more performance tests showcasing Polnox’s cutting-edge technology for biolubricants and bio-oils:

Please contact us for all of your antioxidant needs.

Canola Oil Treated with Various Concentrations of Antioxidants

ASTM D6186 Test at 150 ˚C and 500 PSI of O2

Commercial Biolubricant Treated with Polnox® 8020 at Various Treat Levels