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Toluene diisocyanate ( TDI )


Toluene diisocyanate ( TDI )

Toluene diisocyanate (TDI) is an organic compound with the formula CH3C6H3(NCO)2 and a  member of Isocyanates, which is chemically related to polyurethanes. To sensitize TDI, 2,4-TDI is prepared in three steps from toluene via dinitrotoluene and 2,4-diaminotoluene (TDA). Finally, the TDA is subjected to phosgenation, i.e., treatment with phosgene to form TDI. This final step produces HCl as a byproduct and is a major source of industrial hydrochloric acid. TDA, in turn, reacts with carbonyl dichloride (CDC) to produce toluene diisocyanate (TDI). Toluene diisocyanate produced in Karun is an 80/20 mixture of 2,4-TDI (CAS: 584-84-9) and 2,6-TDI (CAS: 91-08-7) isomers with purity of at least 99.5%.
 
Applications of Toluene Diisocyanate ( TDI)
 
TDI has wide variety of applications which range from furniture industry, bedding and carpets underlay to transportation equipment and packaging industries. The substance is also used in the production of surface coatings, sealants, adhesives and elastomers.
 
Loading and shipping conditions:
Careful consideration should be given to loading and transporting of this product. They should be Stored at a temperature of 20 to 24° C. When sampling this product, appropriate safety equipment should be used and skin contact should be avoided. Containers should be carried with caution and delicately, because the residues are combustible. When cleaning or repairing equipment contaminated with this product, all clothing and safety equipment such as masks, suits, gloves and boots must be used to prevent any direct contact. Empty and irreversible barrels of isocyanate can be disinfected using water. Open the barrel seal and idle it for at least 48 hours. After 48 hours, rinse with (5-10%) sodium carbonate solution.
The product should be handled and thoroughly sealed in containers, to avoid direct personnel contact. Keep away from direct sunlight, water and humidity in a safe place. Due to the corrosive nature of the product, do not store in galvanized or other metal based containers for long period of time. Transportation and storage in steel containers are preferable. There is a possibility of water absorption through plastic, consequently, storage in polyethylene containers is hazardous.
 
Packaging Details:
220 liter (about 250 kg) steel barrels are used for the packaging of the TDI product and every 4 barrels are placedon a pallet. 
 
 
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