DiMethylthiotoluenediaMine (DMTDA) cas 106264-79-3

DimethylthioToluene Diamie / DMTDA, CAS number. 106264-79-3, is a diamines curative for both TDI and MDI systems. Being a viscous liquid at room temperature results in significant processing advantages, i.e. easy transferring, ready to use without melting down the solids like MOCA does. DMTDA is an ideal curing agent used to make durable and flexible polyurethane/polyurea elastomers.

DMTDA can be both a curing agent and a chain extender for diisocyanate pre-polymers, especially for polyurea system providing with good mechanical and dynamic properties. DMTDA is an universal curing agent to combined with other liquid diamines, for example DETDA, to vary curing rates and mechanical properties to meet different requirements. Therefore, there is a wide application of DMTDA on polyurethane wheels, tires, casters, rollers, elastomeric coatings and so on. You can find DMTDA-base finished products everywhere, including construction, mining, automotive, electronics, textiles and printing areas.

Unlike MOCA, 4,4'-Methylenebis(2-chloroaniline), DMTDA is not suspected carcinogens. It’s eco-friendly, non-toxic and safe for workers to handle with during the processing. Benefits with being in liquid form, DMTDA won’t cause any toxic dust, fumes nor vapors while operation. Therefore, workers won’t be exposed to the danger while handling with DMTDA. In early times, the EU polyurethane producers use MOCA as the main curing agent for TDI-based polyurethane systems due to it’s low-price, excellent performance on tensile strength, durability, resiliency and abrasion resistance. In order to protect workers and the environment, more and more countries forbidden the usage of MOCA, thus, it forces polyurethane producers to find the MOCA substitute, the DMTDA, also called liquid MOCA. DMTDA eliminates most of the health hazards associated with handling MOCA and provide excellent physical properties in comparison of MOCA-based polyurethanes/polyureas elastomers.

There is another crucial advantage of DMTDA comparing with MOCA. Since DMTDA is in liquid form, it allows operation at lower temperature than MOCA does. Without melting process which is a must on MOCA, you can save much energy cost during manufacturing. The possibility of solidification does not occur in mixing containers or mixing machines. Additionally, it can be handled at lower temperatures than MOCA for its liquid state. The equivalent weight of DMTDA is 107 comparing with MOCA is 133.5. This means a 20% reduction in weight of prepolymer at the same stoichiometr