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  • Adhesives

Desmodur® CD-S

Desmodur® CD-S is a modified isocyanate based on diphenylmethane-4,4'-diisocyanate.

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About

Product Types

  • MDI
  • MMDI
  • Aromatic polyisocyanate

Material

Adhesives
Solvent-free

General Characterization

Desmodur® CD-S is a modified isocyanate based on diphenylmethane-4,4'-diisocyanate.
Its main application is as the isocyanate component in the production of polyurethane foams, elastomers and adhesives.

Storage Conditions

- Storage in original sealed Covestro container.

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Recommended storage temperature: 20 - 25 °C.

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Protect from moisture, heat and foreign material.


General information: The product is moisture-sensitive and should therefore always be stored in tightly sealed original containers. Prolonged storage at temperatures above 25 °C results in a reduction in quality as the product becomes increasingly cloudy due to the deposition of low-solubility sediment (dimer formation). If the recommended storage temperature is exceeded for a long period (especially if the temperature of the product rises to above 50 °C), or if the recommended shelf life is exceeded, a chemical reaction may take place. In addition to a reduction in the NCO content and an increase in viscosity, carbon dioxide in particular may be generated. The resultant increase in pressure may cause the container to swell or burst.
Storage at above 25 °C considerably shortens the shelf life. Storage at below 20 °C results in crystallization. The product should under no circumstances be stored in crystallized form as this will promote the formation of insoluble dimers and it will no longer be possible to melt the product completely. Delivered product should be spot-checked for crystallization, and cooling to below 20 °C must be avoided. If the product has been transported or stored below 20 °C for a short time, the material must immediately be melted at 60 - 70 °C. The melting point and the time required for this should not be exceeded as this also significantly promotes dimer formation. The entire container contents must be melted and homogenized before the container is immediately sealed and cooled to the recommended storage temperature. There is no risk that quality will be affected should the product have crystallized briefly, but it can be expected that the shelf life will be reduced. The melted material should be used as soon as possible.
Warning : If the recommended storage temperature is exceeded for a long period (especially if the temperature of the product rises to above 50 °C), or if the recommended shelf life is exceeded, or if the product comes in contact with water or bases such as amines, alkalis or metal compounds, a chemical reaction may take place. In addition to a reduction in the NCO content and an increase in viscosity, carbon dioxide in particular may be generated. The resultant increase in pressure may cause the containers to swell or burst. Consequently, if the product is mixed with other components or processed into a prepolymer, it is advisable to check the shelf life of the mixture or prepolymer.

Sampling

No data available

Packaging Type

Drums, IBCs, tank containers or road tankers

Technical Properties & Datasheets

Property Name Test Method Unit Value
Hydrolyzable chlorides (Cl) MDI-01-04 mg/kg max. 50
NCO MDI-01-01 % 29.0 - 30.0
Viscosity 25 °C MDI-01-02 mPa*s 20 - 50

Property Name Test Method Unit Value
Density 20 °C EG A.3 / DIN 51 757 kg/l 1.217
Vapor pressure at 20 °C (MDI) EG A.4 mbar < 0.00001
Pour Point EG A.1 / DIN ISO 3016 °C - 24
Phenyl isocyanate content MDI-01-09 mg/kg max. 10
Flash point EG A.9 / DIN ISO 2719 °C > 250

Downloads

Technical Data Sheet
Download
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com
Download

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