Toluene diisocyanate (TDI) 80/20, identified by CAS number 584-84-9, is a significant chemical compound primarily used in the production of polyurethanes. It consists of two isomers: approximately 80% of 2,4-toluene diisocyanate and 20% of 2,6-toluene diisocyanate. This mixture is widely utilized in various applications due to its properties and effectiveness.
Properties and Specifications
Appearance: TDI 80/20 is typically a colorless to pale yellow liquid with a strong, pungent odor. It is flammable and insoluble in water but miscible with many organic solvents.
Purity: The product generally has a high purity level, often exceeding 99.7%.
Isomer Composition:
2,4-Isomer: 80% ± 1%
2,6-Isomer: 20% ± 1%.
Acidity: The acidity level (as HCl) is typically maintained below 0.0015%.
Hydrolyzable Chloride: This is kept to a maximum of 0.004%.
Applications
TDI 80/20 is primarily used in the following areas:
Polyurethane Production: It is a key precursor in the manufacturing of flexible polyurethane foams, which are used in furniture, automotive seating, and insulation materials.
Coatings and Adhesives: TDI is also utilized in producing high-performance coatings and adhesives, enhancing durability and resistance to environmental factors.
Elastomers and Synthetic Leather: The compound is integral in creating elastomers and synthetic leather, which are used in various consumer products.
Safety and Handling
Due to its chemical nature, TDI is considered hazardous. It can cause respiratory issues and skin irritation upon exposure. Proper safety measures, including the use of personal protective equipment (PPE), are essential when handling this compound. It is classified as a potential occupational carcinogen, necessitating careful management in industrial settings.
In summary, Toluene diisocyanate 80/20 (CAS 584-84-9) is a versatile chemical with significant applications in the polyurethane industry, characterized by its high purity and specific isomer ratios. Its handling requires adherence to safety protocols due to its hazardous nature.
