Desmocoll® 621/2

Predominantly linear, flexible hydroxyl polyurethane with a high crystallisation rate and low thermoplasticity. Good adhesion on PVC substrates. Suitable to formulate adhesives with a long tack life.

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General Characterization

Desmocoll 621/2 is a predominantly linear hydroxyl polyurethane.
Desmocoll 621/2 is a flexible polyurethane with a high rate of crystallization and low thermoplasticity. It has good adhesion on many flexible PVC substrates. Desmocoll 621/2 is characterized in particular by its long tack live after thermal activation.

Storage Conditions

Desmocoll 621/2 should be stored in tightly sealed original containers and protected from direct sunlight, moisture, heat, and foreign materials. Recommended storage temperature is 10º-25ºC.


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Technical Properties & Datasheets

Property Name Test Method Unit Value
Solution viscosity , 15% inbutanone-2 (MEK)at 23^oC, Haake mPa∙s 2,100 - 3,100

Property Name Test Method Unit Value
Density g/ml approx. 1.2
Crystallization h approx. 2
Minimum activation temperature °C approx. 55
Bondability of materials containing plasticizers Very good
Heat resistance °C approx. 70
Hydroxyl content % < 0.1
Hot tack life min. approx. 8


Technical Data Sheet
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