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Desmodur® 44 M Flakes

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  • MMDI
  • Aromatisches Polyisocyanat
  • Isocyanat
  • Reaktives System

Material

Klebstoffe
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Allgemeine Charakterisierung

Desmodur® 44 M Flakes is a monomeric diphenylmethane-4,4'-diisocyanate (MDI).
Desmodur® 44 M Flakes is a monomeric diisocyanate that is solid at room temperature and liquid above around 40 °C. It is suitable for combination with Baycoll®, Desmophen® and Acclaim® in the formulation of adhesives and polyurethane coating resins.

Lagerungsbedingungen

- Storage in original sealed Covestro container.

- Recommended storage temperature: < 5 °C.

- Protect from moisture, heat and foreign material.

General information: The product is sensitive to moisture. Like all isocyanates, it reacts with water to form insoluble urea derivatives and carbon dioxide. In closed containers, the formation of carbon dioxide can results in a dangerous build-up of pressure. Contact with air, especially coupled with exposure to light, accelerates the yellowing of the product. Generally speaking, the processing properties are not affected by yellowing. As a result of dimerization (formation of uretdione), the product is sensitive to heat. The solid product dimerizes more quickly at room temperature than the liquid product stored at 42 °C. Therefore, solid product should be stored at temperatures below 5 °C and melted quickly and carefully. Although dimerization declines with decreasing temperature, the storage stability is also limited at 5 °C. Handling instructions, safety data, information and proposals for melting units can be supplied on request.

Probenahme

Keine Daten verfügbar

Verpackungsart

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Technische Eigenschaften & Datenblätter

Name der Eigenschaft Prüfverfahren Einheit Wert
4,4'-MDI MDI-01-06 % min. 98.2
Hydrolysable chlorine MDI-01-04 mg/kg max. 50
2,4'-MDI MDI-01-06 % max. 1.8

Name der Eigenschaft Prüfverfahren Einheit Wert
Freezing point (2011-0260102-92) °C min. 38.4
Viscosity at 40 °C (2011-0313703-95) mPa*s 4.1
Density at 40 °C DIN 51 757 g/cm3 approx. 1.19
Phenyl isocyanate content (2011-0489801-95) ppm max. 10
NCO content (theoretical) % by wt. 33.6
Vapor pressure at 20 °C hPa -5

Downloads

Technisches Datenblatt
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Sicherheitsdatenblatt
Kein direkter Download verfügbar, bitte besuchen Sie www.productsafetyfirst.covestro.com
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