Dimethylthiotoluenediamine

Dimethylthiotoluenediamine (CAS 106264-79-3), commercially known as DMTDA, is an aromatic diamine curative used primarily in polyurethane and polyurea elastomer systems.

Where is Dimethylthiotoluenediamine used?

• Cast polyurethane elastomers: chain extender and crosslinker controlling mechanical properties and cure profile; reacts with isocyanate-terminated prepolymers for parts needing high load-bearing capacity and abrasion resistance
• Industrial wheels, rollers and mining screens
• Polyurea coatings: automotive underbody protection, pipeline linings and industrial flooring, for controlled gel times and improved flexibility
• Aerospace and defense: structural adhesives and composite matrix systems where precise cure kinetics are critical
• Lubricant additives: antioxidant and metal deactivator component in gear oils and hydraulic fluids
• It is a liquid at ambient temperature with a characteristic amber to brown color.

Good to know: Proper handling and storage are required to maintain chemical stability and performance.

Commercial specifications

• Purity typically 95% or higher
• Drums and IBC totes; bulk quantities through established chemical distributors