Description
TDI is manufactured by the reaction of TDA with carbonyl chloride (phosgene).TDI is a colorless-to-amber liquid with a pungent odor. Commercial-grade TDI (which represents more than 95% of TDI industrial usage) is an 80:20 mixture of the two chemical isomers 2,4- and 2,6-TDI.TDA is manufactured by nitrating toluene to produce dinitrotoluene, which is then catalytically reduced to TDA. TDA is a colorless solid that tends to darken on storage and exposure to air.
Application
TDI is one of the most industrially important diisocyanates.TDI is widely used in the manufacture of flexible polyurethane foams, elastomers, surface coatings, fibers, sealants, and adhesives. Applications and uses for these products include packaging, insulation materials, upholstery, and shoe soles.
