For chemists, formulators, and procurement specialists in the chemical industry, understanding the precise technical specifications of key ingredients is paramount to successful product development and manufacturing. Tris(4-isocyanatophenyl) thiophosphate (TPTI), CAS 4151-51-3, is a specialized fine chemical intermediate that demands careful consideration of its properties and handling protocols. As a leading supplier, we provide essential technical insights to facilitate your purchase and application of TPTI.

Key Technical Properties of TPTI

Tris(4-isocyanatophenyl) thiophosphate is a trifunctional isocyanate with a unique molecular structure that dictates its performance as a crosslinker. Understanding these specifications is crucial for any manufacturer looking to buy TPTI:

  • Chemical Name: Tris(4-isocyanatophenyl) thiophosphate
  • CAS Number: 4151-51-3
  • Molecular Formula: C21H12N3O6PS
  • Molecular Weight: Approximately 465.38 g/mol
  • Appearance: Typically a White to Light Yellow Powder. (Note: Some sources may indicate a liquid form depending on formulation/purity, but the powder is common for this CAS number in its pure state).
  • Melting Point: Approximately 84-86 °C. This solid form at room temperature requires appropriate heating for processing in liquid-phase applications.
  • NCO Content: For solutions, it might be around 7.2 ± 0.2%, indicating the active isocyanate content crucial for crosslinking reactions.
  • Purity: Available typically at 98% or higher, ensuring reliable reaction kinetics and performance.
  • Solubility: Soluble in anhydrous and alcohol-free solvents like ethyl acetate, dichloropropane, toluene, acetone, and methyl ethyl ketone. Compatibility with aliphatic hydrocarbons can lead to turbidity, but solutions in natural rubber show good compatibility.
  • Hydrolytic Sensitivity: Generally stable with water under neutral conditions, but moisture exposure should be minimized due to the reactivity of isocyanate groups.

Handling and Usage Recommendations

Due to the reactive nature of isocyanate groups, proper handling is essential:

  • Moisture Prevention: Store in tightly sealed containers in a cool, dry place to prevent moisture absorption, which can lead to unwanted reactions and loss of active NCO content.
  • Controlled Temperature: If melting is required for processing, controlled heating is necessary. Avoid overheating, which can cause decomposition.
  • Personal Protective Equipment (PPE): Always use appropriate PPE, including gloves, eye protection, and respiratory protection, as isocyanates can be irritants.
  • Pot Life Management: When mixed with polyols or other reactive components, TPTI has a limited pot life. Formulations must be used within the designated timeframe to ensure optimal performance.

Sourcing TPTI: Your Trusted Partner

When you need to buy Tris(4-isocyanatophenyl) thiophosphate, relying on experienced manufacturers and suppliers is key. We are committed to providing high-quality TPTI with comprehensive technical support. Understanding these specifications allows you to make informed decisions and ensure successful integration into your production processes. Contact us to discuss your needs and get a quote.