Desmodur® BL 3175A

Blocked aliphatic HDI-polyisocyanate. With Desmophen® grades to formulate lightfast one-component polyurethane stoving coatings; as an additive to improve flexibility and adhesion.

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Product Types

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General Characterization

Desmodur BL 3175A is a blocked aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) and dissolved in aromatic 100.

Storage Conditions

Desmodur BL 3175A should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Processability of this product can be adversely affected by contamination. Brief heating to maximum 50ºC has no adverse effect on product properties. Recommended storage temperature is 0º-50ºC. At temperatures above 120°C, Desmodur BL 3175A begins to decompose.


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Technical Properties & Datasheets

Property Name Test Method Unit Value
Hazen color value ≤ 60
Viscosity at 25°C mPa∙s 2,000 - 4,000
Solids % 73 - 77
Free NCO content % ≤ 0.2

Property Name Test Method Unit Value
Specific gravity at 25°C g/cm^3 1.06
Weight per gallon at 25°C lb. 8.83
Flash point (Setaflash) °C 51
Blocked NCO content % 11.1
Appearance Clear, paleyellow liquid


Technical Data Sheet
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