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Desmophen® 670

Slightly branched, hydroxyl-bearing polyester.As a co-reactant, usually with Desmodur® N 75 and Desmodur® N 3390, in the formulation of flexible, weather-stable coatings.

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General Characterization

Desmophen 670 is a slightly branched, hydroxyl-bearing polyester.
Desmophen 670 is suitable for use a co-reactant, usually with Desmodur® N 75A and Desmodur® N 3390A, in the formulation of flexible, weather-stable coatings.

Storage Conditions

Desmophen 670 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Under certain conditions (temperatures below 15°C, long storage) the product may become cloudy. It can be completely rehomogenized by heating to around 40°C or adding solvent, and can be further processed without any loss of quality. Recommended storage temperature is less than 30ºC.

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Density at 20°C g/ml approx. 1.17
Flash point °C approx. 195
Pour point °C approx. 8
Equivalent weight approx. 395

Specifications

Property Name Test Method Unit Value
Acid value mg KOH/g 2 ± 1
Water content % ≤ 0.1
Hydroxyl content % 4.3 ± 0.4
Viscosity at 23°C80% in butyl acetate mPa∙s 2,200 ± 400
Hazen color value ≤ 150

Downloads

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

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