English
中文简体Trioctyl Trimellitate (commonly abbreviated as TOTM) is a high-performance plasticizer widely used in the production of flexible PVC products that require excellent heat resistance, low volatility, and superior electrical insulation. As a trimellitate ester, Trioctyl Trimellitate stands out among plasticizers for its exceptional long-term performance in demanding environments.
Trioctyl Trimellitate is a type of trimellitate ester produced through the esterification of trimellitic anhydride with 2-ethylhexanol. It is a clear, oily liquid with excellent plasticizing properties. As a high molecular weight plasticizer, TOTM provides outstanding durability and resistance to extraction, making it a preferred choice for critical applications.
Key Features and Benefits
One of the main advantages of Trioctyl Trimellitate is its excellent thermal stability. Unlike conventional plasticizers like DOP (dioctyl phthalate), TOTM can withstand prolonged exposure to high temperatures without significant degradation. This makes it suitable for applications such as wires and cables, automotive interiors, and medical devices.
In addition to heat resistance, Trioctyl Trimellitate offers low volatility. This characteristic ensures that the plasticizer remains within the PVC matrix over time, preventing product shrinkage and surface blooming. As a result, materials retain their flexibility and performance characteristics for years.
Another benefit of TOTM is its resistance to extraction by oils, fuels, and solvents. This feature is especially important in the automotive and electrical industries, where exposure to chemicals is common. TOTM’s resistance ensures long-lasting mechanical and physical properties.
Applications of TOTM
Trioctyl Trimellitate is used in a variety of high-end applications where conventional plasticizers may fail. Common uses include:
Wire and cable insulation: Due to its excellent electrical properties and low volatility, TOTM is a top choice for insulating materials in power and communication cables.
Automotive components: TOTM’s thermal and chemical stability make it suitable for dashboards, seals, and under-the-hood components.
Medical devices: Thanks to its low migration and high purity, TOTM is often used in medical tubing and blood bags as an alternative to phthalate-based plasticizers.
Flexible vinyl films and sheets: These are used in environments requiring consistent performance under stress and varying temperatures.
Comparison with Other Plasticizers
Compared to DOP, DINP (Diisononyl Phthalate), and DOA (Dioctyl Adipate), TOTM delivers better resistance to high temperatures and chemical extraction. While it may come at a higher initial cost, its long service life and superior performance often translate to lower overall lifecycle costs. TOTM is often chosen when product longevity, safety, and compliance are paramount.
