Triphenyl phosphate CAS 115-86-6 TPP

1. Effective Flame Retardancy

• Gas-Phase Mechanism: TPP acts primarily in the gas phase. When heated, it decomposes to form PO· radicals, which scavenge the highly reactive H· and OH· radicals responsible for propagating the combustion cycle, effectively quenching the flame.

• Synergistic Effect: It often works well in combination with other flame retardants (e.g., nitrogen-based ones) to enhance overall flame retardant efficiency.

2. Excellent Plasticizing Performance

• TPP is an efficient solvating plasticizer. It effectively reduces the glass transition temperature of polymers, increasing their flexibility, processability, and elongation.

• It exhibits outstanding solvating power for cellulose esters like nitrocellulose and cellulose acetate, resulting in films with high clarity and good mechanical properties.

3. Good Thermal and Chemical Stability

• TPP offers good thermal stability, making it suitable for many plastic processing techniques that require moderate to high temperatures.

• It is chemically stable and generally does not react adversely with host polymer matrices.

4. Low Volatility

• Compared to many common phthalate plasticizers, TPP has low volatility. This helps finished products maintain their properties over time by reducing losses due to evaporation, which can cause embrittlement.

5. Cost-Effectiveness

• As a well-established commodity chemical with stable production processes, TPP is a cost-competitive option, offering excellent value for its performance.

1. As a Flame Retardant (Major Application)

• Engineering Plastics: Widely used in PC/ABS alloys, modified polyphenylene oxide (PPO), and phenolic resins to provide flame retardancy for electronic enclosures (e.g., laptop housings, printer parts), connectors, and components, often helping to achieve a UL94 V-0 rating.

• Polymers & Rubber: Used in PVC, polyurethane (PU) foam, and various rubber applications such as wire and cable coatings, conveyor belts, and mining hoses to enhance fire safety.

2. As a Plasticizer

• Cellulose Plastics: Serves as a classic and high-performance plasticizer for nitrocellulose (CN) and cellulose acetate. It is used to manufacture products like spectacle frames, tool handles, toys, and film, offering transparency, toughness, and good water resistance.

• PVC and Other Polymers: Also used as a plasticizer for PVC, particularly in applications requiring low volatility and some inherent flame retardancy.

3. Other Specialized Applications

• Solvent and Extracting Agent: Used as a solvent for rare metal extraction and as a reaction medium in organic synthesis.

• Chemical Intermediate: Acts as a key intermediate for synthesizing other phosphate ester derivatives.

• Adhesives and Coatings: Incorporated as an additive to improve flexibility in adhesives or to impart flame retardancy to coatings.