For procurement specialists and R&D scientists in the polyurethane sector, understanding the critical specifications of Toluene Diisocyanate (TDI) 80/20 is fundamental to ensuring product quality and process efficiency. As a prominent chemical intermediate manufacturer and supplier, we emphasize the importance of precise technical data when you buy TDI 80/20. This article outlines the essential specifications to look for and why they matter.

The primary identifier for this widely used grade of TDI is its CAS Number: 26471-62-5. Commercially, TDI 80/20 refers to a mixture where approximately 80% is the 2,4-toluene diisocyanate isomer and 20% is the 2,6-toluene diisocyanate isomer. This specific isomer ratio is carefully controlled during production as it significantly influences the reactivity and the properties of the final polyurethane product, particularly in flexible foam applications.

Key quality parameters for TDI 80/20 typically include:

  • Purity: High-purity TDI 80/20 usually exceeds 99.8% by weight. This high purity is crucial as impurities can interfere with the polymerization process, leading to inconsistent foam structure, reduced physical strength, or unwanted side reactions.
  • Isomer Content: As mentioned, the 80/20 ratio of 2,4-TDI to 2,6-TDI is standard. Minor deviations might occur, but significant discrepancies can alter product performance.
  • Acidity: Measured as hydrochloric acid (HCl), acidity levels are typically very low, often around 0.0004%. High acidity can negatively impact catalyst activity and product stability.
  • Hydrolyzable Chloride: This is another critical indicator of purity, usually specified at less than 0.0033%. High levels can lead to corrosion and affect product shelf life.
  • Color (APHA): A low APHA color value, such as 5, indicates a clear, pale yellow liquid, free from significant color-forming impurities. Color can be an important aesthetic factor in some polyurethane applications.

When you inquire about the TDI 80/20 price, ensure that the quoted product meets these stringent specifications. Sourcing from a reliable Toluene Diisocyanate supplier that provides Certificates of Analysis (CoA) with each batch is vital for quality assurance and regulatory compliance. These documents verify that the product conforms to the agreed-upon standards.

We are committed to delivering TDI 80/20 that consistently meets or exceeds these specifications. Our advanced manufacturing processes and rigorous quality control ensure that you receive a product that performs reliably in your applications. Contact us today to learn more about our product specifications and to discuss your sourcing needs.