• Coatings

Desmodur® BL 3660 IB/X

Diethyl malonate blocked, aliphatic polyisocyanate based on HDI / IPDI.

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Product Types

  • PIC
  • Aliphatic polyisocyanate
  • Crosslinkers
  • Hardeners
  • Polyisocyanurate
  • Isocyanate


Solventborne, Flexible

General Characterization

Diethyl malonate blocked, aliphatic polyisocyanate based on HDI / IPDI.
In combination with Desmophen® grades to formulate lightfast, one-component stoving polyurethane coatings; as an additive in conventional stoving coating systems to improve the reactivity, flexibility and adhesion.

Storage Conditions

- Storage in original sealed Covestro container.

- Recommended storage temperature: 5 - 25 °C.

- Protect from frost, moisture, heat and foreign material.

General information: The product is sensitive to moisture. Storage at higher or lower temperatures can lead to irreversible changes to the product.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Viscosity at 25 °C mPa*s 100 - 600
Color value Hazen ≤ 150
Non-volatile content % 58 - 62

Property Name Test Method Unit Value
Equivalent weight approx. 660
Blocked NCO content % approx. 6.3
Density at 20 °C g/ml approx. 1.02
Flash point °C approx. 25


Technical Data Sheet
Safety Data Sheet
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