| Inspection Item |
Standard |
Inspection Result |
| The content of Toluene Diisocyanate%≧ |
99.5 |
99.9 |
| Isomer Ratio(2,4/2,6) |
80.0/20.0±1.0 |
80.0/20.0 |
| Hydrolysis chlorine% ≤ |
0.01 |
0.0021 |
| Acidity(as HCL)% ≤ |
0.004 |
0.001 |
| Chroma(Hazen)≤ |
25 |
﹤15 |
TDI (toluene diisocyanate) is one of the commonly used polyisocyanates, and polyisocyanates are polyurethane (PU) materials and important basic raw materials. TDI commonly used in polyurethane industry is a mixture of 2,4-TDI and 2,6-TDI isomers, including three commonly used brands: TDI-80/20, TDI-100 and TDI-65/35. The preceding figures indicate the content of 2,4-TDI in the composition. For example, 80 in TDI-80/20 indicates that its composition is 80% 2,4-TDI and 20% 2,6-TDI; 100 in TDI-100 basically represents 2,4-TDI (about 98%) and 2,6-TDI has few isomers.
TDI is mainly used for producing flexible polyurethane foam and polyurethane elastomers, coatings, adhesives and so on
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