Its chemical formula is C₂₄H₃₈O₄ (structural formula: p-C₆H₄(COOCH₂CH(C₂H₅)C₄H₉)₂ and CAS number is 6422-86-2. It is a colorless, transparent, and nearly odorless viscous liquid with low volatility, excellent thermal stability, and superior compatibility with polymers. As a green alternative to traditional phthalate plasticizers (e.g., DOP, DBP), DOTP has gained widespread adoption in the plastic industry due to its environmental and safety advantages.

Key Applications

Primary Plasticizer for PVC: The most dominant application of DOTP is as a primary plasticizer for polyvinyl chloride (PVC). It imparts excellent flexibility, low-temperature resistance, and weather resistance to PVC products, while maintaining high mechanical strength. It is widely used in PVC cables, pipes, profiles, artificial leather, flooring, and medical PVC products (e.g., infusion tubes, blood bags).

Polymer Modifier: Serves as a modifier for ABS, PS, and polyurethane (PU) resins, improving their toughness, impact resistance, and processing performance. It is also used in thermoplastic elastomers (TPEs) to enhance elasticity and durability.

Coatings & Adhesives: Added to industrial coatings, automotive paints, and structural adhesives as a coalescing agent and plasticizing solvent, improving film-forming properties, adhesion, and resistance to water, chemicals, and UV radiation.

Lubricant & Grease Additive: Used as an additive in lubricating oils and greases to improve viscosity index, anti-wear performance, and high-temperature stability. It is particularly suitable for high-performance lubricants for automotive and industrial machinery.