Dimethyl thio-toluene diamine (DMTDA), CAS No. 106264-79-3, is a high-performance, environmentally friendly liquid aromatic diamine curing and chain-extending agent specially developed for polyurethane and polyurea systems. As an upgraded alternative to traditional MOCA curing agents, it features a unique thioether molecular structure, low chemical equivalent, low viscosity, and excellent low-temperature constructability, making it a core auxiliary material for manufacturing high-performance polyurethane elastomer products.
Different from conventional solid curing agents, DMTDA exists as a stable low-viscosity liquid at room temperature, requiring no heating melting before use. It solves the construction pain points of poor fluidity and difficult operation of traditional curing agents in low-temperature environments, enabling smooth construction and complete curing in cold working conditions. Its low chemical equivalent effectively improves the cross-linking reaction efficiency of polyurethane systems, reduces material consumption, and endows finished products with more uniform and stable molecular structure.
Benefiting from its special molecular composition, this product boasts outstanding comprehensive performance including excellent hydrolysis resistance, chemical corrosion resistance and mechanical toughness. The thioether structure significantly enhances the wear resistance, tear resistance and aging resistance of polyurethane elastomers, greatly extending the service life of finished products. Meanwhile, DMTDA has good compatibility with various aliphatic and aromatic isocyanates, polyols and resin raw materials, with stable formulation adaptability and no adverse reaction with conventional additives.
In addition, DMTDA is a low-toxic, non-MOCA environmentally friendly material, compliant with modern environmental protection and safety production standards. It features moderate curing speed, easy process control, no rapid curing burst phenomenon, and excellent mold filling and leveling performance, which can effectively improve product yield and surface finish.
It is widely applicable in numerous high-end industrial fields, including cast polyurethane elastomers, SPUA spray polyurea coatings, RIM reaction injection molding materials, industrial rubber rollers, solid tires, sealing gaskets, as well as high-performance adhesives, sealants and epoxy resin curing systems. It is the preferred curing cross-linking agent for manufacturing wear-resistant, corrosion-resistant and high-toughness polyurethane finished products.
| Dimethyl thio-toluene diamine Chemical Properties |
| Boiling point | 200°C (1.68 mmHg) |
| density | 1.206 |
| vapor pressure | 10Pa at 25℃ |
| Water Solubility | 162mg/L at 20℃ |
| InChI | InChI=1S/C9H14N2S2/c1-5-4-6(12-2)8(11)9(13-3)7(5)10/h4H,10-11H2,1-3H3 |
| InChIKey | AOFIWCXMXPVSAZ-UHFFFAOYSA-N |
| SMILES | C1(C=C(C)C(N)=C(SC)C=1N)SC |
| LogP | 2.5 at 20℃ |
| CAS DataBase Reference | 106264-79-3(CAS DataBase Reference) |
| EPA Substance Registry System | 1,3-Benzenediamine, 2(or 4)-methyl-4,6(or 2,6)-bis(methylthio)-(106264-79-3) |
| Safety Information |
| Hazard Codes | Xn;N,N,Xn |
| Risk Statements | 43-50/53-22 |
| Safety Statements | 2-24-37-60-61 |
| RIDADR | 2810 |
| HazardClass | 6.1 |
| PackingGroup | III |
