• Adhesives

Desmodur® T 80

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Product Types

  • Isocyanate
  • TDI



General Characterization

Desmodur® T 80 is a mixture of the two isomeric forms 2,4-toluene diisocyanate [A] and 2,6-toluene diisocyanate [B] in the ratio 80:20. At room temperature the product is a water-clear liquid. Desmodur® T80 CN is used for the production of Polyurethanes. Desmodur® T 80 is used for the production of polyurethanes.

Storage Conditions

- Storage in original sealed Covestro container.
- Recommended storage temperature: 18 - 40°C.
- Protect from moisture, heat and foreign material.
General information:
The product is sensitive to moisture and heat. It should be protected against contact with atmospheric moisture. Higher storage temperatures for prolonged periods may result in discoloration or the formation of insoluble deposits. The product crystallizes at temperatures below 18°C. However, careful melting at up to 50°C will reliquify the product without any detrimental effect on its quality. The contact surface temperature may not exceed 80°C. The reliquified product must be homogenized as crystallisation causes a shift in the isomer ratio between the crystalline and the still liquid phases.
Opened containers must be resealed after removing product. If stored for long periods, the product should be overlaid with nitrogen. The product reacts with water to release carbon dioxide. During storage, transfer and handling of the product, contact with water in any form (damp containers, solvents containing water, moist air) must be prevented as the generation of carbon dioxide may result in a dangerous increase in pressure. The polyureas which are formed at the same time may result in turbidity. They may also cause blockages and breakdowns in filters, pumps and pipes.
Storage time:
Covestro represents that, for a period of twelve months following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in section "specifications or characteristic data" above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under section "storage" above and is otherwise handled appropriately.
The lapse of the twelve months period does not necessaril ... text to long! (max 2000 characters)


The access of moisture in any form must be prevented.

Packaging Type

No data available

Technical Properties & Datasheets


Property Name Test Method Unit Value
Freezing point DIN 53175 °C approx. 13
Flash point DIN 51758 °C 127
Density 25 °C DIN 51757 g/cm³ approx. 1.22
NCO content DIN 53185 % by wt. min. 48
Viscosity 25 °C DIN 53015 mPa*s approx. 3
Appearance DIN ISO 6271 Colorless to pale liquid


Property Name Test Method Unit Value
Purity TDI-01-01 % by wt. ≥ 99.5
Purity TDI-01-01 % by wt. ≥ 99.5
Hydrolysable chlorine TDI-01-03 mg/kg ≤ 100
2,4-isomer content TDI-01-04 % by wt. 79.5 - 81.5
2,4-isomer content TDI-01-04 % by wt. 79.5 - 81.5
Acidity TDI-01-02 mg/kg ≤ 40
Hydrolysable chlorine TDI-01-03 mg/kg ≤ 100
Acidity TDI-01-02 mg/kg ≤ 40


Technical Data Sheet
Safety Data Sheet
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