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.
The isocyanate functional groups in TDI react with hydroxyl groups to form carbamate (urethane) links. The two isocyanate groups in TDI react at different rates: The 4-position is approximately four times more reactive than the 2-position. 2,6-TDI is a symmetrical molecule and thus has two isocyanate groups of similar reactivity, similar to the 2-position on 2,4-TDI. However, since both isocyanate groups are attached to the same aromatic ring, reaction of one isocyanate group will cause a change in the reactivity of the second isocyanate group. It is also sometimes used in Rocket propellants.
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Shandong S-Sailing Chemical Co. Ltd. is located in Dongying, a beautiful oriental pearl city in the Yellow River Delta. Founded in 2012 with a registered capital of 30 million Yuan, the company has a total asset of 120 million Yuan and 60 staffs. It is a
comprehensive service company with import and export of chemical industry and domestic trade as the basis. To better develop its import and export business, Dongying Juncheng Import and Export Co. Ltd. was founded in 2014. The company has professional marketing team. With its dedicated team of documents and devoted operating team, it has been receiving consensus approval by domestic and overseas partners. The company has been forever going after seeking for trust with services, seeking for cooperation with trust, seeking for support with cooperation, seeking for friendship with support and seeking for perpetual friendship.
So far, our main products including basic inorganic and organic chemicals, such as, Methylene chloride, Trichloroethylene,
Aniline, Propylene glycol,Refined Naphthalene, Dichloropropane, Dimethyl carbonate, Dimethyl formamide and other related products.
Philosophy: Make the business easy for our customers.
Best service for customer.
We welcome your esteemed customer to cooperate with us.