With the continuous increase in the demand for efficient, environmentally friendly and high-performance additives in new materials industries such as polyurethane and epoxy resin, dimethyl thio-toluene diamine (DMTDA, CAS number: 106264-79-3) has gradually become a core driving force for industry upgrading due to its unique product characteristics and wide application scenarios. As a new type of aromatic diamine curing agent and chain extender, DMTDA is gradually replacing traditional solid curing agents. Dimethyl thio-toluene diamine has been applied on a large scale in multiple fields such as automobiles, construction, cold chain, and anti-corrosion, promoting the industry to transform towards low-carbon, high-efficiency and high-end development.
The characteristics of dimethyl thio-toluene diamine (DMTDA)
The core advantages of Dimethyl thio-toluene diamine (DMTDA) stem from its physical property of being in a liquid state at room temperature and its excellent chemical performance. Compared with the traditional solid curing agent MOCA, this product can be directly pumped and used without heating. This not only significantly reduces energy consumption and operational complexity in the production process, but also can be adapted for low-temperature construction scenarios, effectively addressing industry pain points such as crystallization of the curing agent during winter production and inconvenient construction.
Data shows that the reactivity of DMTDA is 3.7 times that of MOCA. It can quickly form a rigid urea structure with isocyanates, enhancing the tensile strength and tear strength of elastomer products by 20%-30%. At minus 40 degrees Celsius, it still maintains excellent elasticity and its hydrolysis performance is improved by 30% compared to MOCA, making it suitable for extreme conditions such as humidity and low temperatures.
The application of dimethyl thio-toluene diamine (DMTDA)
In the field of polyurethane elastomers, DMTDA has become a key raw material for the production of high-end products. It is widely used in processes such as casting polyurethane elastomers, reaction injection molding (RIM), and spraying polyurea (SPUA), and can be used to produce products such as high-mobility rubber rollers, industrial casters, oil pipe scrapers, and automotive shock absorption components. Due to its outstanding mechanical strength and oil resistance, aging resistance, dimethyl thio-toluene diamine (DMTDA) meets the strict requirements of mechanical manufacturing and the automotive industry for the durability of components. Particularly in the field of cold chain transportation, the seals and shock absorption pads prepared with DMTDA can adapt to extreme low-temperature environments, providing a guarantee for the stable operation of cold chain vehicles and refrigeration equipment, and becoming an important support for the upgrade of cold chain logistics.
Architecture and anti-corrosion engineering is another core application scenario of DMTDA. As an epoxy resin curing agent, dimethyl thio-toluene diamine can be used to prepare high-performance anti-corrosion coatings and fireproof coatings, which are widely applied in the anti-corrosion of metal pipeline inner walls, fireproof treatment of building roofs and side walls, etc. The cured coating has excellent adhesion, chemical corrosion resistance and structural stability, which can effectively extend the service life of infrastructure. In scenarios with severe corrosion such as marine engineering and mining equipment, DMTDA-based coatings can resist erosion from seawater, acidic and alkaline media, significantly reduce equipment maintenance costs, and help upgrade technologies in the field of high-end anti-corrosion.
The development prospects of dimethyl thio-toluene diamine (CAS 106264 79 3)
Environmental compliance and market potential have further accelerated the substitution process of dimethyl thio-toluene diamine. With regions such as the EU implementing restrictions on the use of toxic solid curing agents like MOCA, the low-toxicity and environmentally friendly DMTDA amine has become the preferred alternative in the industry. It not only complies with international environmental protection regulations but also reduces dust pollution during the production process and enhances the safety of workshop operations. From the market trend perspective, the global market size of DMTDA and similar products reached 2.873 billion yuan in 2024. It is expected to grow at a compound annual growth rate of 17.06% from 2025 to 2030. Among them, the casting polyurethane elastomer field is the largest application scenario, and the growth in demand from high-end manufacturing has become the core driving force for market expansion.
Industry experts have stated that the large-scale application of DMTDA ethacure 300 not only promotes the product iteration in the curing agent industry, but also helps the downstream industries achieve cost reduction, efficiency improvement, and high-end upgrading. In the future, with the continuous breakthroughs in new material technologies, the application of DMTDA amine in aerospace, medical devices, and high-end adhesives and other fields will further expand. At the same time, high-purity (≥99%) and customized ratio DMTDA products will become the focus of market competition and lead the industry towards a more refined and high-performance direction. Unilong Industry, through technological innovation and capacity expansion, is gradually enhancing its voice in the global DMTDA market and providing important support for the autonomy and controllability of the industrial chain.
Post time: Jan-23-2026