toluene diisocyanate CAS: 26471-62-5 TDI80/20

Product Details

Toluene diisocyanate (TDI) is an organic compound with the chemical formula C9H6N2O2. It is a colorless liquid with a pungent odor.

Nature:

-Appearance: Colorless liquid

-Ignition temperature: approximately 270 ° C

-Specific gravity: 1.22-1.23 g/cm ³

-Molecular weight: 174.2 g/mol

-Boiling point: 253-254 ° C

Usage:

-TDI is mainly used for the production of polyurethane. Polyurethane has good strength, abrasion resistance and chemical resistance, and is widely used in making foam materials, coatings, adhesives, elastomers and plastic products.

Method:

The product of nitration and hydrogenation of toluene, toluene diamine, is used as the raw material to react with phosgene (COCl2), and then subjected to post-treatment to obtain toluene diisocyanate. The synthesis of toluene diisocyanate using phosgene method is commonly used in industry. There are intermittent and continuous methods in the process. The large equipment is mainly produced using continuous process.

Security information:

TDI has strong toxicity and reactivity. Its volatiles have a strong irritant effect on the skin, eyes, and mucous membranes, causing tears, sore throat, and cough. Long term exposure can cause bronchitis, and in a few cases, asthma, bronchiectasis, and even pulmonary heart disease may occur. When the concentration of TDI in the air exceeds 0.05mg/L, severe coughing and shortness of breath occur when inhaled by the human body. The maximum allowable concentration in the air is 0 02mg/m3. TDI is prone to reacting with moisture and tissues in the skin and body. Therefore, exhaust devices should be installed in the operating area. Operators should wear protective equipment and prohibit contact with the skin when using the product. Galvanized iron drum packaging, with a net weight of 250kg per drum. Store and transport according to the regulations for toxic and dangerous goods. Sealed steel drums are used for transportation, and damage to the drums should be prevented during loading, unloading, and transportation. If the packaging bucket is damaged or the seal is damaged, the product in the bucket should be used as soon as possible, otherwise it should be sealed with nitrogen and oxygen. The product should be stored in a cool, ventilated and dry place, and the container should be kept closed. The storage temperature should be between 15-40 ℃. To prevent rain and sunlight exposure. At the same time, this product is a combustible material, and attention should be paid to fire prevention during transportation, storage, and use. If the product solidifies below the specified storage temperature, it must be melted before use (direct baking with open flames is prohibited) and the product in the bucket must be thoroughly mixed and evenly mixed.