What is TDI product and what does TDI mean?

TDI is a colorless liquid with a spicy, pungent smell and a boiling point of 247, pour point. It is stable in the room temperature environment, it will polymerize at 50 degrees Celsius, and TDI is insoluble in water but can react quickly with water, so it is necessary to pay attention to the low temperature drying of the container and environment when storing TDI. TDI reacts easily with bases, amines, and polyols, which is also a factor to consider during the storage and transportation of TDI.

High temperatures accelerate the reaction, which releases heat and carbon dioxide, which poses a risk of burns and pressure.

TDI: English abbreviation for toluene diisocyanate.

There are several important steps in the management of TDI products: issuance of MSDS, proper labeling, emergency response capability, pre-marketing audit, audit methods and qualifications, and compliance with regulations. Among them, the main purposes of issuing Safety Data Sheets (MSDS) are as follows:

Regulatory requirements for dangerous goods, provide users with information on product hazards, help users establish a safe workplace, protect the environment, provide promotion materials for the correct labeling of products, and compile a comprehensive and easy-to-understand set of technical specifications for all kinds of readers. Dangerous goods must be labeled: dangerous goods barrels must have safety labels, transport vehicles must have transport labels, and for countries that do not have regulations on the transport of dangerous goods, it is recommended to adopt international standards.

For dangerous goods, use the hazard warning (R) to indicate the danger of the product, and use the safety warning (S) to provide safe handling and emergency advice. In addition, precautions should be taken when handling and storing TDI to ensure the safe handling, handling and storage of products (drums) with compatible and incompatible packaging materials.

TDI: toluene diisocyanate.

Generally, there are three grades: 80, 65, and 100.

BASF, BYER, Mitsui all have production.

Now that the market is bleak, it is better not to intervene.

The TDI product is toluene diisocyanate.

The full name of TDI is the English abbreviation of toluene diisocyanate.

TDI (toluene diisocyanate) is a commonly used polyisocyanate, and polyisocyanate is an important basic raw material for polyurethane (PU) materials. Polyurethane is an emerging organic polymer material.

Known as the "fifth largest plastic", it is widely used in many fields of the national economy because of its excellent performance. The product application fields involve light industry, chemical industry, electronics, textile, medical, construction, building materials, automobile, national defense, aerospace and aviation.

1. Turbocharged direct injection (diesel engine).

TDI is the abbreviation of Turbo Direct Injection in English, which means turbocharged direct injection (diesel engine). In order to solve the congenital deficiency of SDI, people have installed a turbocharging device on the diesel engine, so that the intake pressure is greatly increased, and the compression ratio is generally more than 10, so that a large torque can be achieved at a very low speed, and because the combustion is more sufficient, the content of harmful particles in the emission is also greatly reduced.

2. TDI (toluene diisocyanate) is generally toluene diisocyanate

Toluene diisocyanate, there are six isomers, namely toluene-2,3-diisocyanate, toluene-2,4-diisocyanate, toluene-2,5-diisocyanate, toluene-2,6-diisocyanate, toluene-3,4-diisocyanate, toluene-3,5-diisocyanate.

Among them, toluene-2,4-diisocyanate and toluene-2,6-diisocyanate are the most common. Toluene diisocyanate in industry is usually a mixture of toluene-2,4-diisocyanate and toluene-2,6-diisocyanate.

Toxicology data for TDI

TDI has an LD50 of 5800 mg kg (mouth) and an LC50 of 610 mg M3 (steam). According to this dose, although it is classified as "low toxicity", it is still classified as "highly toxic" by the European Community.

In the United States, OSHA sets a permissible exposure limit of ppm (mg M3), while NIOSH does not because it is classified as a possible occupational carcinogen.

The above content refers to Encyclopedia-tdi

Encyclopedia-tdi

TDI: English abbreviation for toluene diisocyanate.

Molecular Formula: C9H6N2O2 Molecular Weight :

Synonyms: toluene diisocyanate, toluene 2,4-diisocyanate, methyl phenylene group, 2,4-diisocyanate, 4-methyl-1,3-phenyl diisocyanate.

TDI and MDI serve very different purposes.

TDI and MDI are both the main raw materials of polyurethane, but due to differences in structure and performance, the subdivision and use are very different. PolyMDI is mainly used in polyurethane venerate rigid foam and semi-rigid foam, which is used in insulation materials, automotive trim parts, and construction industries. TDI is mainly used in polyurethane flexible foams, which are used in furniture cushions, sound-absorbing materials and toys.

PolyMDI is mainly used in polyurethane rigid foam and semi-rigid foam, which is used in thermal insulation materials, automotive trim parts, and construction industries. TDI is mainly used for polyurethane flexible foam, which is used in furniture cushions, sound-absorbing materials, toys and other industries. At the same time, due to the severe toxicity of TDI, its application is limited to a certain extent, and it is far less extensive than MDI.

Applications of MDI:

As one of the indispensable raw materials for polyurethane, MDI has no ideal substitute. Through the analysis of the five forces of the MDI industry, it can be seen that MDI has strong bargaining power in the upstream and downstream of the industrial chain, and there are extremely high technical barriers, so the threat from potential entrants and substitutes is very low.

With demand far outstripping supply, competition is not fierce, and product margins are high, so it can be expected that this trend of high margins will continue in the next two years. <>

TDI, that is, toluene diisocyanate, has two isomers, 2,4 toluene diisocyanate and 2,6 toluene diisocyanate (TDI), which are mainly used as raw materials for polyurethane flexible foams, coatings, rubber, fibers, and adhesives.

MDI is methylene diphenyl diisocyanate, which is an organic substance and the main downstream product of aromatic hydrocarbons, which is widely used in the production of polyurethane elastomers and polyurethane materials such as synthetic fibers, artificial leather, and solvent-free coatings.

It is a mixed system of TDI and MDI isocyanates, MDI and TDI are not interchangeable, because TDI only contains one benzene ring, while MDI is connected by two benzene rings, which has different effects on the rigidity and flexibility of the elastomer. The application in foaming is not very clear, so I will not explain it.

TDI stands for turbocharged in-cylinder injection.

Many turbocharged and naturally aspirated engines are equipped with in-cylinder direct injection limb search technology.

In the past, many cars used air intake injection, also known as multi-point injection.

The fuel injector of an engine equipped with direct injection technology is located in the cylinder. This injection method can make the gasoline atomized more thoroughly, so that the gasoline and the air can be fully mixed.

Generally, engines with direct injection technology are more powerful than engines with multi-point injection technology.

Most turbocharged engines use in-cylinder direct injection technology.

Some cars will also have engines equipped with hybrid injection technology, including in-cylinder direct injection and multi-point injection.

The hybrid jet scattering technology is better, so that the engine can use different injection methods under different working conditions, which can improve the fuel economy and power of the engine.

One disadvantage of most in-cylinder direct injection engines is that they are prone to carbon deposits.

Direct injection engines are susceptible to carbon build-up, especially in the valves and combustion chambers.

Therefore, it is recommended that owners of in-cylinder direct injection engines regularly clean up the carbon deposits in the engine.

When removing carbon deposits, it is recommended that riders use the walnut sand removal method, which is more effective.

Some repair shops will use hanging bottles to remove carbon deposits, but this method is actually very ineffective.

Millions of car purchase subsidies.