Industrial use:

TDI (toluene diisocyanate) is one of the commonly used polyisocyanate, and polyisocyanate is an important base material of polyurethane (PU). The TDI commonly used in the polyurethane industry is a mixture of 2,4-TDI and 2,6-TDI isomers, including three commonly used grades: TDI-80/20, TDI-100 and TDI-65/35. The preceding number indicates the amount of 2, 4-TDI in the composition. For example, 80 in TDI-80/20 means that its composition is 80% 2, 4-TDI and 20% 2, 6-TDI; The 100 in TDI-100 means that almost all of them are 2, 4-TDI (about 98%), and 2, 6-TDI is rarely isomers. Mainly used in the production of soft polyurethane foam and polyurethane elastomer, coatings, adhesives and so on.

Usage management:

PUWORLD (2007/06/14) -- TDI is a colorless liquid with a pungent, pungent odor with a boiling point of 247℃ and a pour point of 12.5 -- 14.5℃. It is stable at room temperature and will polymerize at 50 degrees Celsius. In addition, TDI is insoluble in water but can react quickly with water. Therefore, attention should be paid to the low temperature drying of the container and environment when storing TDI. TDI is easy to react with bases, amines, and polyols, which is also a factor to be considered during the storage and transportation of TDI. High temperatures accelerate the reaction, which releases heat and carbon dioxide, posing a risk of burns and pressure.

Effects of TDI on human body and first aid measures:

High concentrations of TDI steam can irritate the eyes. When inhaled, TDI steam can severely irritate the nose and throat, causing chest tightness that can lead to asthma and even bronchospasm. Liquid TDI can also cause severe irritation to the skin and eyes. It has low toxicity when ingested and can irritate the stomach and intestines. So if someone comes into contact with or ingests TDI, what first aid should we take?

Skin polluters should be washed immediately with soap and water; Patients with eye contamination should immediately rinse their eyes with water for at least 15 minutes. If contact lenses are worn, remove them and seek medical advice. For patients who ingest TDI, symptoms usually appear several hours after ingestion. Do not induce vomiting. Let the patient rest and seek medical attention. At present, there is no specific antidote for TDI poisoning, and it is generally treated as primary stimulation or bronchospasm. When necessary, artificial respiration should be done in time.

About TDI product management:

The management of TDI products consists of the following important steps: issue of MSDS, correct labeling, emergency response capacity, pre-supply and marketing audit, audit method and qualification, compliance enforcement, etc. Among them, the purposes of issuing SAFETY data Sheets (MSDS) are as follows: to meet the regulatory requirements of dangerous goods, to provide users with information about the dangers of products, to help users establish a safe workplace, to protect the environment, to label products correctly, to provide promotional materials, and to prepare a comprehensive and understandable technical manual for all kinds of readers.