Trioctyl trimellitate

Trioctyl trimellitate (TOTM) is a high-performance plasticizer that combines the advantages of both polyester and monomeric plasticizers, widely used across various industrial fields. Its main applications are as follows:

I. Core Applications in Wires and Cables

1. ‌Heat-Resistant Wire and Cable Materials‌
   • As the primary plasticizer for 105°C heat-resistant cables, used in insulation layers and sheath materials, it offers excellent electrical insulation (volume resistivity ≥5×10¹¹ Ω·cm) and high-temperature stability (flash point ≥240°C), ensuring safe operation in long-term high-temperature environments.
   • Suitable for plasticizing systems in 6000V and 10000V high-voltage cables.

II. Plastic and Resin Products

1. ‌High-Performance PVC Products‌
   • Used in automotive interiors (dashboards, seats), artificial leather, sheets, and gaskets to enhance heat resistance (high thermal decomposition temperature), cold resistance, and impact strength.
   • Better compatibility than polyester plasticizers, processing efficiency similar to phthalates, with outstanding migration resistance and water extraction resistance.
2. ‌Other Resin Systems‌
   • Suitable for nitrocellulose, vinyl chloride-acetate copolymers, etc., improving flexibility and low-temperature performance.

III. Medical and Precision Instruments

1. ‌Medical Devices‌
   • Used as a plasticizer for PVC medical catheters, blood bags, etc., meeting biocompatibility requirements, with low migration ensuring safety.
2. ‌High-Precision Components‌
   • Used in optical instruments, semiconductor packaging materials, and automated mechanical parts, providing dimensional stability and durability.

IV. Specialized Industrial Fields

1. ‌Coatings and Sealants‌
   • Modifier for high-temperature paints and marine coatings, enhancing coating flexibility and weather resistance; key component in construction sealants and waterproof membranes.
2. ‌Electronics and Electrical Appliances‌
   • Used in power capacitor impregnating oils and electronic component packaging materials, relying on high insulation (stable dielectric constant) to ensure equipment reliability.
3. ‌Emerging Applications‌
   • Cosmetic creams and emulsions (active ingredient ≥98%), antistatic carbon nanotube composites.

️ Key Performance Advantages

‌Note‌:

• *In food contact materials, limited to reusable vinyl chloride polymers (content ≤50%), prohibited from direct contact with infant food.
• Physical properties: density 0.984–0.991 g/cm³ (20°C), viscosity approx. 210 mPa·s (25°C), refractive index 1.482–1.488.